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SDLRC - Scientific Articles all years by Author - Sn-Ss


The Sheahan Diamond Literature Reference Compilation
The Sheahan Diamond Literature Reference Compilation is compiled by Patricia Sheahan who publishes on a monthly basis a list of new scientific articles related to diamonds as well as media coverage and corporate announcementscalled the Sheahan Diamond Literature Service that is distributed as a free pdf to a list of followers. Pat has kindly agreed to allow her work to be made available as an online digital resource at Kaiser Research Online so that a broader community interested in diamonds and related geology can benefit. The references are for personal use information purposes only; when available a link is provided to an online location where the full article can be accessed or purchased directly. Reproduction of this compilation in part or in whole without permission from the Sheahan Diamond Literature Service is strictly prohibited. Return to Diamond Resource Center
Sheahan Diamond Literature Reference Compilation - Scientific Articles by Author for all years
A-An Ao+ B-Bd Be-Bk Bl-Bq Br+ C-Cg Ch-Ck Cl+ D-Dd De-Dn Do+ E F-Fn Fo+ G-Gh Gi-Gq Gr+ H-Hd He-Hn Ho+ I J K-Kg Kh-Kn Ko-Kq Kr+ L-Lh
Li+ M-Maq Mar-Mc Md-Mn Mo+ N O P-Pd Pe-Pn Po+ Q R-Rh Ri-Rn Ro+ S-Sd Se-Sh Si-Sm Sn-Ss St+ T-Th Ti+ U V W-Wg Wh+ X Y Z
Sheahan Diamond Literature Reference Compilation - Media/Corporate References by Name for all years
A B C D-Diam Diamonds Diamr+ E F G H I J K L M N O P Q R S T U V W X Y Z
Tips for Users
Posted/Published Reference CodesThe SDLRC provides 3 types of references identified in the reference code. DS for scientific article, DM for a media article, and DC for a corporate announcement. Consider DS0512-0001. The DS stands for "diamond scientific". 05 stands for 2005, the year the reference was posted. 12 represents the month the reference was posted. For all years prior to 2015 the default month is 12. -0001 is the reference's identifier and it does not mean anything. The number below the refence code, ie 2015, is the year the article was published. Note that the posted year may sometimes be later than the published year.
Sort OrderReferences are sorted by the "author" name and when the reference was posted to the compilation.
Most RecentIf the reference code is highlighted yellow, the reference was made available through the most recent monthly compilation of new literature. Use this to check out new references. When new references are posted, we make it our priority to track down an online link and obtain an abstract. With regard to older references, tracking down an abstract and an online link is a work in progress.
Link to external location of article: If the title has a link, it means we have found a location online where you can either retrieve the full article free, or purchase access to it. The Sheahan Diamond Literature Service is not a technical article procurement service; if you want a restricted article, you must deal directly with the vendor who controls the copyright to the article.
Searching this page for a specific term or authorIn your Firefox browser click Edit in the menu bar and then Find. In the Find box that shows up at the bottom of the web page enter your search term. Firefox will highlight all occurrences. This is particularly helpful when the author you are seeking was not the lead author by whom the compilation is sorted.
Sending or sharing a referenceThe left column (Posted/Published) has an embedded hyperlink for each reference. In Firefox, if you right click on it, you can obtain the link url for that reference's location within the page, which you can copy and paste into an email or any other document. You can also use the "share this link" option to tweet, facebook etc the link.
Author Index
A-An Ao+ B-Bd Be-Bk Bl-Bq Br+ C-Cg Ch-Ck Cl+ D-Dd De-Dn Do+ E F-Fn Fo+ G-Gh Gi-Gq Gr+ H-Hd He-Hn Ho+ I J K-Kg Kh-Kn Ko-Kq Kr+ L-Lh
Li+ M-Maq Mar-Mc Md-Mn Mo+ N O P-Pd Pe-Pn Po+ Q R-Rh Ri-Rn Ro+ S-Sd Se-Sh Si-Sm Sn-Ss St+ T-Th Ti+ U V W-Wg Wh+ X Y Z
Sheahan Diamond Literature Reference Compilation - Scientific Articles by Author for all years - Sn-Ss
Posted/
Published
AuthorTitleSourceRegionKeywords
DS1989-0581
1989
Snail, K.A.Hannssen, L.M., Carrington, W.A., Butler, J.E., Snail, K.A.Diamond synthesis using an oxygen acetylene torchMaterial Letters, Vol. 7, No. 7-8, Dec. pp. 289-292GlobalDiamond synthesis
DS201911-2564
2019
Snatish, M.Snatish, M., Tsunogae, T., Yang, C-X., Han, Y-S., Hari, K.R., Prasanth, M., Uthup, S.The Bastar craton, central India: a window to Archean-paleoproterozoic crustal evolution.Gondwana Research, in press available 69p. PdfIndiacraton

Abstract: The Bastar craton in central India, surrounded by cratonic blocks and Paleoproterozoic to Neoproterozoic orogenic belts, is a window to investigate the Archean-Paleoproterozoic crustal evolution and tectonic processes. Here we propose a new tectonic classification of the craton into the Western Bastar Craton (WBC), Eastern Bastar Craton (EBC), and the intervening Central Bastar Orogen (CBO). We present petrologic, geochemical and zircon U-Pb, REE and Lu-Hf data from a suite of rocks from the CBO and along the eastern margin of the WBC Including: (1) volcanic successions comprising meta-andesite and fine-grained amphibolite, representing arc-related volcanics along a convergent margin; (2) ferruginous sandstone, in association with rhyolite, representing a volcano-sedimentary succession, deposited in an active trench; and (3) metamorphosed mafic-ultramafic suite including gabbro, pyroxenite and dunite invaded by trondhjemite representing the section of sub-arc mantle and arc root adjacent to a long-lasting subduction system. Petrologic studies indicate that the mafic-ultramafic suite crystallized from an island arc tholeiitic parental magma in a suprasubduction zone environment. The chondrite-normalized and primitive mantle normalized diagrams of the mafic and ultramafic rocks suggest derivation from MORB magma. The mixed characters from N-MORB to E-MORB of the studied samples are consistent with subduction modification of a MORB related magma, involving partial melting of the metasomatized mantle wedge. Our zircon U-Pb age data suggest that the cratonic nuclei was constructed as early as Paleoarchean. We present evidence for active subduction and arc magmatism through Mesoarchean to Neoarchean and early Paleoproterozoic, with the trench remaining open until at least 2.3 Ga. Two major crust building events are recognized in the Bastar craton: during Mesoarchean (recycled Paleoarchean subduction-related as well as juvenile/depleted mantle components) and Neoarchean (accretion of juvenile oceanic crust, arc magmatism including granite batholiths and related porphyry mineralization). The final cratonization occurred during latest Paleoproterozoic, followed by collisional assembly of the craton and its incorporation within the Peninsular Indian mosaic during Mesoproterozoic. In the global supercontinent context, the craton preserves the history of Ur, the earliest supercontinent, followed by the Paleo-Mesoproterozoic Columbia, as well as minor thermal imprints of the Neoproterozoic Rodinia and associated Grenvillian orogeny.
DS1984-0684
1984
Snead, J.I.Snead, J.I., Mcculloh, R.P.Geologic Map of LouisianaLousiana Geological Survey, MAP 1: 500, 000GlobalGeology, Mid Continent
DS1989-1416
1989
Sneath, P.H.A.Sneath, P.H.A., Langham, C.D.OUTLIER: a BASIC program for detecting outlying members of multivariate clusters based on presence-absencedataComputers and Geosciences, Vol. 15, No. 6, pp. 939-964GlobalComputer, Program -OUTLIER.
DS1975-0776
1978
Snedden, T.Kay, S.M., Kay, R.W., Hangas, J., Snedden, T.Crustal Xenoliths from Potassic Lavas, Leucite Hills, WyominGeological Society of America (GSA), Vol. 10, No. 7, P. 432. (abstract.).United States, Wyoming, Rocky Mountains, Leucite HillsBlank
DS1981-0382
1981
Snedden, W.T.Snedden, W.T., Kay, S.Initial Stages of Kimberlite Eruption: Evidence from Mantle minerals in Ithaca Kimberlites.Geological Society of America (GSA), Vol. 13, P. 557. (abstract.).United States, Appalachia, New YorkGenesis, Mineral Chemistry
DS1981-0383
1981
Snedden, W.T.Snedden, W.T., Kay, S.Mineral Chemistry of Kimberlite and Included Xenocrysts Ithaca, New York.Geological Society of America (GSA), Vol. 13, No. 3, P. 178. (abstract.).United States, Appalachia, New YorkGeochemistry
DS1983-0348
1983
Snedden, W.T.Kay, S.M., Snedden, W.T., Foster, B.P., Kay, R.W.Upper Mantle Crustal Fragments in the Ithaca KimberlitesJournal of GEOLOGY, Vol. 91, No. 3, PP. 277-290.United States, Appalachia, New YorkNodules, Xenoliths, Petrography
DS1983-0586
1983
Snedden, W.T.Snedden, W.T.Mineralogy and Setting of the Ithaca KimberlitesMsc. Thesis, Cornell University, 91P. AND 72P. APPENDICES.United States, Appalachia, New YorkChemistry, Petrography, Regional Geology, Tectonics, Geophysics
DS1988-0649
1988
Sneddon, M.V.Sneddon, M.V., Hall, D.R.Polycrystalline diamond, manufacture, wear mechanism sand implications for bit designJournal of Petr. Technology, Vol. 40, No. 12, pp. 1593-1601GlobalDiamond Application, CVD.
DS1989-0589
1989
Snee, L.W.Harlan, S.S., Geissman, J.W., Snee, L.W., Schmidt, C.J.Paleomagnetism of Proterozoic mafic dikes, southwest Montana foreland, USANew Mexico Bureau of Mines Bulletin., Continental Magmatism Abstract Volume, Held, Bulletin. No. 131, p. 121 Abstract held June 25-July 1MontanaPaleomagnetics, Dike
DS1991-0667
1991
Snee, L.W.Harlan, S.S., Mehnert, H.H., Snee, L.W., Meen, J.K.Preliminary isotopic (K-Ar and 40Ar/38Ar) age determinations from selected Late Cretaceous and Tertiary igneous rocks in MontanaGuidebook of the Central Montana Alkalic Province, ed. Baker, D.W., Berg. R., No. 100, pp. 136. extended abstractMontanaGeochronology, Igneous rocks
DS1995-1985
1995
Snee, L.W.Verplanck, P.L., Farmer, G.L., Snee, L.W.Isotopic evidence on the origin of compositional layering in an epizonal magma bodyEarth and Planetary Science Letters, Vol. 136, No. 1-2, Nov. 1, pp. 31-42GlobalLayered intrusions, Geochronology
DS1996-0599
1996
Snee, L.W.Harlan, S.S., Geissman, J.W., Snee, L.W., Reynolds, R.L.Late Cretaceous remagnetization of Proterozoic mafic dikes southern Highland Mountains southwest Montana -Ar40 Ar39Geological Society of America (GSA) Bulletin., Vol. 108, No. 6, June pp. 653-668.MontanaGeochronology, Paleomagnetics -Highland Mountains
DS2003-0304
2003
Snee, L.W.Cunningham, D., Owen, L., Snee, L.W., Jiliang, L.Structural framework of a major transcontinental orogenic termination zone: the extremeJournal of the Geological Society of London, Vol. 160, 4, July pp. 575-590.ChinaTectonics - not specific to diamonds
DS200412-0392
2003
Snee, L.W.Cunningham, D., Owen, L., Snee, L.W., Jiliang, L.Structural framework of a major transcontinental orogenic termination zone: the extreme easternmost Tien Shan, China.Journal of the Geological Society, Vol. 160, 4, July pp. 575-590.ChinaTectonics - not specific to diamonds
DS201312-0008
2013
Snegirev, O.V.Afanasiev, V.P., Snegirev, O.V., Tychkov, N.S., Pokhilenko, N.P.Stability of kimberlite garnets exposed to chemical weathering: relationship with Cr contents.Doklady Earth Sciences, Vol. 448, 1, pp. 103-105.TechnologyGarnet mineralogy
DS2002-0375
2002
Sneider, R.Deschamps, F., Trampert, J., Sneider, R.Anomalies of temperature and iron in the uppermost mantle inferred from gravity dat a and tomographic...Physics of the Earth and Planetary Interiors, Vol.129, 3-4, pp.245-64.MantleGeophysics - gravity, Tomography - models
DS200412-0680
2004
Sneider, R.Godey, S., Deschamps, F., Trampert, J., Sneider, R.Thermal and compositional anomalies beneath the North American continent.Journal of Geophysical Research, Vol. 109, B1, 10.1029/2003 JB002263United States, CanadaGeothermometry
DS1992-1439
1992
Sneider, R.M.Sneider, R.M.The economic value of a synergistic organization. Paper quoted duringWoodall's address to SEG Denver MeetingPreprint, 9pAustraliaEconomics, Exploration philosophy
DS2002-0824
2002
Snell, C.S.Kendall, J.M., Sol, S., Thomson, C.J., White, D.J., Asudeh, I., Snell, C.S.Seismic heterogeneity and anisotropy in the western Superior Province, Canada:Geological Society of London Special Publication, No. 199, pp. 27-44.Northwest Territories, Ontario, Manitoba,SaskatchewanGeophysics - seismics
DS200912-0011
2009
Snelling, A.A.Armitage, M.H., Snelling, A.A.Radiohalos and diamonds Are diamond really for ever? Answers in genesis.Proceedsings of the Sixth International Conference on Creationism, Sept. 9, 20p.MantleJust for interest!
DS1960-0776
1967
Snelling, N.J.Allen, P.M., Snelling, N.J., Rex, D.C.Age Determinations from Sierra LeoneM.i.t. Annual Report 15th., NOS. 1381-1415.Sierra Leone, West AfricaGeochronology, Kimberlite
DS1984-0179
1984
Snelling, N.J.Cahen, L., Snelling, N.J., Delhal, J., Vail, J.R.The Geochronology and Evolution of AfricaOxford Clarendon Press, 512P.Africa, South Africa, West Africa, Central Africa, East AfricaKimberley, Tectonics, Structure, Regional Geology
DS1998-0866
1998
SnelsonLevander, A., Henstock, T.J., Snelson, Keller, GormanThe deep probe experiment: what is the role of inherited structure in thecontinents?Geological Society of America (GSA) Annual Meeting, abstract. only, p.A161.Northwest TerritoriesTectonics, Lithoprobe
DS1999-0356
1999
SnelsonKeller, G.R., Miller, Snelson, Sheehan, Levander, GrauchCrustal structure of the Rocky Mountain region, review and recent resultsGeological Society of America (GSA), Vol. 31, No. 7, p. 186. abstract.Alberta, WyomingTectonics
DS200512-0503
2005
SnelsonKeller, G.R., Karlstrom, K.E., Williams, M.L., Miller, K.C., Andronicos, C., Levander, A.R., Snelson, ProdehlThe dynamic nature of the continental crust-mantle boundary: crustal evolution in the southern Rocky Mountain region as an example.American Geophysical Union, Geophysical Monograph, No. 154, pp. 403-420.United States,Wyoming, Colorado PlateauTectonics
DS1997-1069
1997
Snelson, C.M.Snelson, C.M., Keller, G.R., et al.Western North American crustal structure: deep probe 1995Geological Society of America (GSA) Abstracts, Vol. 29, No. 2, March 20-21, p. 48.Alberta, Wyoming, MontanaTectonics, Crustal structure
DS1998-0575
1998
Snelson, C.M.Hanstock, T.J., Levander, A.R., Snelson, C.M., et al.The deep probe experiments: continent scale active source seismic profilingAmerican Geophysical Union (AGU) Annual Meeting, Vol 79, No. 17, p. 229. abstract.Alberta, Montana, Colorado PlateauGeophysics - seismics
DS1998-0865
1998
Snelson, C.M.Levander, A., Henstock, T.J., Snelson, C.M., KellerThe Deep Probe experiment; what is the role of inherited structure in the continents?Geological Society AmericanAnn.Meet., Vol. 30, No. 7, p. 161. abstract.Alberta, Western CanadaLithoprobe
DS1998-1364
1998
Snelson, C.M.Snelson, C.M., Henstock, T.J., Keller, Miller, LevanderCrustal and uppermost mantle structure along the Deep Probe seismic profileRocky Mountain Geol., Vol. 33, No. 2, pp. 181-98.Alberta, Western CanadaGeophysics - seismics, Lithoprobe
DS2003-0163
2003
Snelson, C.M.Brocher, T.M., Parsons, T., Trehu, A.M., Snelson, C.M., Fisher, M.A.Seismic evidence for Wide spread serpentinized forearc upper mantle along theGeology, Vol. 31, 3, pp. 267-70.California, Oregon, Washington, CascadiaGeophysics - seismics, Subduction
DS2003-0164
2003
Snelson, C.M.Brocher, T.M., Parsons, T., Trehu, A.M., Snelson, C.M., Fisher, M.A.Seismic evidence for Wide spread serpentinized forearc upper mantle along theGeology, Vol. 31, 3, pp. 267-70.California, OregonGeophysics - seismics
DS2003-0165
2003
Snelson, C.M.Brocher, T.M., Parsons, T., Trehu, A.M., Snelson, C.M., Fisher, M.A.Seismic evidence for Wide spread serpentinized forearc upper mantle along theGeology, Vol. 31, 3, March, pp. 267-270.California, Oregon, CascadesGeophysics - seismics, Subduction, slabs
DS2003-0166
2003
Snelson, C.M.Brocher, T.M., Parsons, T., Trehu, A.M., Snelson, C.M., Fisher, M.A.Seismic evidence for Wide spread serpentinized forearc upper mantle along theGeology, Vol. 31, 3, March pp. 267-70.California, United StatesGeophysics - seismics
DS200412-0212
2003
Snelson, C.M.Brocher, T.M., Parsons, T., Trehu, A.M., Snelson, C.M., Fisher, M.A.Seismic evidence for Wide spread serpentinized forearc upper mantle along the Cascadia margin.Geology, Vol. 31, 3, March pp. 267-70.United States, CaliforniaGeophysics - seismics
DS200512-1011
2005
Snelson, C.M.Snelson, C.M., Keller, G.R., Miller, K.C., Rumpel, H.M., Prodehl, C.Regional crustal structure derived from the CD-ROM 99 Seismic Refraction/Wide Angle Reflection Profile: the lower crust and upper mantle.American Geophysical Union, Geophysical Monograph, No. 154, pp. 271-292.United States,Wyoming, Colorado PlateauGeophysics - seismics, tectonics
DS201412-0855
2014
Snetkov, V.I.Snetkov, V.I., Talgamer, B.L.Appraisal and exploitation of mining and dressing waste at dredge sites. Journal of Mining Science, Vol. 50, 1, pp. 108-114.Russia, TransbaikaliaDiamond alluvials
DS201412-0856
2014
Snetkov, V.I.Snetkov, V.I., Talgamer, B.L.Appraisal and exploitation of mining and dressing waste at dredge sites. ( Mainly gold but diamonds as well).Journal of Mining Science, Vol. 50, 1, pp. 108-114.RussiaDredging
DS1991-0622
1991
Snieder, R.Gubbins, D., Snieder, R.Dispersion of P waves in subducted lithosphere: evidence for an eclogitelayerJournal of Geophysical Research, Vol. 96, No. B 4, April 10, pp. 6321-6335GlobalMantle, Eclogites
DS2000-0825
2000
Snieder, R.Rohm, A.H.E., Snieder, R., Goes, S., Trampert, J.Thermal structure of continental upper mantle inferred from S wave velocity and surface heat flow.Earth and Planetary Science Letters, Vol.181, No.3, Sept.15, pp.395-407.MantleGeothermometry, Geophysics - seismics
DS2001-0247
2001
Snieder, R.Deschamps, F., Snieder, R., Trampert, J.The relative density to shear velocity scaling in the uppermost mantlePhysical Earth and Planetary Interiors, Vol. 124, No. 3-4, Aug. pp. 193-212.MantleGeophysics - seismics, gravity
DS201504-0220
2015
SNL Metals & MiningSNL Metals & MiningWorld exploration trends 2015SNL Metals Economics Group, March 3, 11p.GlobalExploration - prices, budgets, arenas
DS201312-0853
2012
SNL Metals Economics GroupSNL Metals Economics Group23rd edition of corporate exploration strategies estimates worldwide total exploration budgets to surpass $ 21.5 billion in 2012.SNL Metals Economics Group, Dec. 6, 2p. SummaryGlobalEconomics
DS201312-0854
2013
SNL Metals Economics GroupSNL Metals Economics GroupGroup pipeline activity index Nov-Dec 2012. SNL Metals Economics Group, Feb. 5, 2p.GlobalFinancing
DS201312-0855
2013
SNL Metals Economics GroupSNL Metals Economics GroupWorldwide exploration trends 2013.PDAC 2013, 5p.GlobalEconomics
DS1994-1646
1994
Snoeyenbos, D.K.Snoeyenbos, D.K., Williams, M.I.An Archean eclogite facies terrane from the Snowbird tectonic zone, northern Saskatchewan.Eos, Vol. 75, No. 16, April 19, p. 355.SaskatchewanTectonics, Eclogite facies
DS1995-1785
1995
Snoeyenbos, D.R.Snoeyenbos, D.R., Williams, M.C., Hanmer, S.Archean high pressure metamorphism in the western Canadian ShieldEur. Journal of Mineralogy, Vol. 7, No. 6, Nov. 1, pp. 1251-1272Cordillera, British Columbia, Alberta, Yukonmetamorphism, Shield
DS201509-0434
2015
Snoeyenbos, D.R.Valley, J.W., Reinhard, D.A., Cavosie, A.J., Ushikubo, T., Lawrence, D.F., Larson, D.J., Kelly, T.F., Snoeyenbos, D.R., Strickland, A.Nano- and micro-geochronology in Hadean and Archean zircons by atom-probe tomography and SIMS: new tools for old minerals.American Mineralogist, Vol. 100, pp. 1355-1377.AustraliaGeochronology

Abstract: Atom-probe tomography (APT) and secondary ion mass spectrometry (SIMS) provide complementary in situ element and isotope data in minerals such as zircon. SIMS measures isotope ratios and trace elements from 1–20 µm spots with excellent accuracy and precision. APT identifies mass/charge and three-dimensional position of individual atoms (±0.3 nm) in 100 nm-scale samples, volumes up to one million times smaller than SIMS. APT data provide unique information for understanding element and isotope distribution; crystallization and thermal history; and mechanisms of mineral reaction and exchange. This atomistic view enables evaluation of the fidelity of geochemical data for zircon because it provides new understanding of radiation damage, and can test for intracrystalline element mobility. Nano-geochronology is one application of APT in which Pb isotope ratios from sub-micrometer domains of zircon provide model ages of crystallization and identify later magmatic and metamorphic reheating.
DS1997-1070
1997
Snoke, A.W.Snoke, A.W., Tullis, J., Todd, V.R.Princeton atlas of fault related rocksPrinceton University of Press, $ 125.00 see date 1998 availabilityGlobalBook - ad, Atlas - Fault related rocks
DS1994-0826
1994
Snoke, J.A.James, D.E., Snoke, J.A.Structure and tectonics in the region of flat subduction beneath centralPeru: crust and uppermost mantleJournal of Geophy. Research, Vol. 99, No. B4, April 10, pp. 6899-6912PeruTectonics, Structure
DS1994-1647
1994
Snoke, J.A.Snoke, J.A., James, D.E.Structure of the continental lithosphere beneath southeast Brasil from surfacewave inversion: prel. results.International Symposium Upper Mantle, Aug. 14-19, 1994, pp. 121-123.BrazilTectonics, Lithosphere
DS200612-0766
2006
Snoke, J.A.Larson, A.M., Snoke, J.A., James, D.E.S-wave velocity structure, mantle xenoliths and the upper mantle beneath the Kaapvaal Craton.Geophysical Journal International, Vol. 167, 1, Oct., pp. 171-186.Africa, South AfricaGeophysics - seismics
DS2002-0103
2002
Snook, I.K.Barnard, A.S., Russo, S.P., Snook, I.K.Comparative Hartree-Fock and density functional theory study of cubic and hexagonal diamond.Philosophical Magazine B., Vol. 82, 17, pp. 1767-1776.GlobalDiamond - morphology
DS2003-0070
2003
Snook, I.K.Barnard, A.S., Russoa, S.P., Snook, I.K.Coexistence of bucky diamonds with nanodiamond and fullerene carbon phasesPhysical Review, Vol. 68, 7, 4p.GlobalDiamond - morphology
DS200412-0095
2003
Snook, I.K.Barnard, A.S., Russoa, S.P., Snook, I.K.Coexistence of bucky diamonds with nanodiamond and fullerene carbon phases.Physical Review Letters, Vol. 68, 7, 4p.TechnologyDiamond - morphology
DS1995-1014
1995
Snopkov, S.V.Kozhevnikov, N.O., Snopkov, S.V.Supermagnetism of traps and its relation to TEM anomaliesRussian Geology and Geophysics, Vol. 36, No. 5, pp. 89-100.Russia, YakutiaGeophysics -TEM., Deposit -Ivushka, Amakinskaya
DS1998-0158
1998
SnowBrandon, A.D., Walker, Morgan, Snow190 Pc 186 Os isotopic systematics of the upper mantle and some plumesMineralogical Magazine, Goldschmidt abstract, Vol. 62A, p. 227-8.MantleConvection, Chromitites, peridotites
DS201510-1811
2015
Snow, A.M.Vandenberg, J.A., Herrell, M., Faithful, J.W., Snow, A.M., Lacrampe, J., Bieber, C., Dayyani, S., Chisholm, V.Multiple modeling approach for the aquatic effects assessment of a proposed northern diamond mine development. Gahcho KueMine Water and the Environment, in press available, 19p.Canada, Northwest TerritoriesDeposit - Gahcho Kue

Abstract: Eight water models were used to assess potential aquatic environmental effects of the proposed Gahcho Kué diamond mine on groundwater and surface water flow and quality in the Northwest Territories, Canada. This sequence of models was required to cover different spatial and temporal domains, as well as specific physico-chemical processes that could not be simulated by a single model. Where their domains overlapped, the models were interlinked. Feedback mechanisms amongst models were addressed through iterative simulations of linked models. The models were used to test and refine mitigation plans, and in the development of aquatic component monitoring programs. Key findings generated by each model are presented here as testable hypotheses that can be evaluated after the mine is operational. This paper therefore offers a record of assumptions and predictions that can be used as a basis for post-validation.
DS201609-1754
2016
Snow, A.M.Vandenberg, J.A., Herrell, M., Faithful, J.W., Snow, A.M., Lacrampe, J., Bieber, C., Dayyani, S., Chisholm, V.Multiple modeling approach for the aquatic effects assessment of a proposed northern diamond mine development.Mine Water and the Environment, Vol. 35, pp. 350-368.Canada, Northwest TerritoriesDeposit - Gahcho Kue

Abstract: Eight water models were used to assess potential aquatic environmental effects of the proposed Gahcho Kué diamond mine on groundwater and surface water flow and quality in the Northwest Territories, Canada. This sequence of models was required to cover different spatial and temporal domains, as well as specific physico-chemical processes that could not be simulated by a single model. Where their domains overlapped, the models were interlinked. Feedback mechanisms amongst models were addressed through iterative simulations of linked models. The models were used to test and refine mitigation plans, and in the development of aquatic component monitoring programs. Key findings generated by each model are presented here as testable hypotheses that can be evaluated after the mine is operational. This paper therefore offers a record of assumptions and predictions that can be used as a basis for post-validation.
DS200612-1292
2006
Snow, C.A.Shragge, J., Snow, C.A.Bayesian geochemical discrimination of mafic volcanic rocks.American Journal of Science, Vol. 306, 3, pp. 191-209.TechnologyGeochemistry - not specific to diamonds
DS1981-0384
1981
Snow, D.Snow, D.Ashton Mining Venture Clamps Security on Kimberleys SiteThe National Times, JANUARY 18TH-24TH., P. 5.Australia, Western AustraliaArgyle, Description Of Site, Aborigine
DS2002-1517
2002
Snow, G.G.Snow, G.G., Juhas, A.P.Trends and forces in mining and mineral explorationSociety of Economic Geologists Special Publication, No.9,pp.1-16.GlobalEconomics - trends, evolutionary, consolidation, Statistics, charts, information, discoveries
DS1989-0183
1989
Snow, J.Brown, G., Bracewell, H., Snow, J.Gems of the Mud Tank carbonatiteThe Australian Gemologist, Vol. 17, No. 2, May pp. 52-59AustraliaCarbonatite, Mineralogy
DS1995-1786
1995
Snow, J.A.Snow, J.A.Legal aspects of due diligenceProspectors and Developers Association of Canada (PDAC) Short Course, March 4, pp. 7-40CanadaDue diligence, Legal -Ore reserves
DS1994-1648
1994
Snow, J.E.Snow, J.E., Hart, S.R., Dick, H.J.B.neodymium and Strontium isotope evidence linking mid-ocean ridge basalts and abyssal peridotitesNature, Vol. 371, Sept. 1, pp. 57-60GlobalPeridotites, Geochronology
DS1998-1365
1998
Snow, J.E.Snow, J.E., Schmidt, G.Constraints on Earth accretion deduced from noble metals in the oceanicmantleNature, Vol. 391, No. 6663, Jan. 8, pp. 166-168MantleAccretion, Noble metals, gold, PlatinuM.
DS2002-0701
2002
Snow, J.E.Hellebrand, E., Snow, J.E., Muhe, R.Mantle melting beneath Gakkel Ridge ( Arctic Ocean): abyssal peridotite spinel compositions.Chemical Geology, Vol.182, 2-4, Feb.15, pp.227-55.Arctic OceanPeridotites
DS201112-1009
2011
Snow, J.E.Stracke, A., Snow, J.E., Hellebrand, E., Von der Handt, A., Bourdon, B., Birbaum, K., Gunther, D.Abyssal peridotite Hf isotopes identify extreme mantle depletion.Earth and Planetary Science Letters, Vol. 308, 3-4, pp. 359-368.Mantle, Europe, GreenlandGeochronology
DS201112-1010
2011
Snow, J.E.Stracke, A., Snow, J.E., Hellebrand, E., Von der Handt, A., Bourdon, B., Birbaum, K., Guther, D.Abyssal peridotite Hf isotopes identify extreme mantle depletion.Earth and Planetary Science Letters, Vol. 308, 3-4, pp. 359-368.OceanGakkel Ridge
DS201701-0032
2016
Snow, J.E.Snow, J.E.Petit spots go big. Mantle enrichment processes.Nature Geoscience, Vol. 9, pp. 862-3.MantlePlume, hotspots

Abstract: Mantle enrichment processes were thought to be limited to parts of oceanic plates influenced by plumes and to continental interiors. Analyses of mantle fragments of the Pacific Plate suggest that such enrichment processes may operate everywhere.
DS1993-0799
1993
Snow, M.Kelmelis, J.A., Snow, M.Proceedings of the U.S. Geological Survey global change research forumUnited States Geological Survey (USGS) Circular, No. 1086, 121pUnited StatesBook -ad, Global change
DS1995-1787
1995
Snow, R.A.Snow, R.A.Directors and officers liabilitiesMining and the Environment: regulation and liability, 52pCanadaEconomics, Legal
DS1975-1001
1979
Snowden, D.V.Eales, E.V., Snowden, D.V.Chromiferous Spinels of the Elephant's Head DikeMineralium Deposita., Vol. 14, No. 2, PP. 227-242.Tanzania, East AfricaRelated Rocks
DS1981-0385
1981
Snowden, D.V.Snowden, D.V.Mineralogy and Petrology of Two Kimberlites at Dutoitspan Mine, kimberley.Msc. Thesis, Rhodes University, 134P.South AfricaMicroprobe, Analyses
DS1996-1336
1996
Snowden, D.V.Snowden, D.V.Practical interpretation of resource classification guidelinesAusIMM Conference Perth March 24-28, pp. 305-308AustraliaEconomics, Geostatistics, reserves, resources
DS2000-0341
2000
Snowden, D.V.Glacken, I.M., Snowden, D.V.Mineral resource estimationMin. Res. Ore Res. Est. AusIMM Guide, Mon. 23, pp. 189-98.AustraliaEconomics - geostatistics, ore reserves, exploration, Not specific to diamonds
DS2000-0906
2000
Snowden, D.V.Snowden, D.V.Practical interpretation of mineral resource and ore reserve classification guidelines.Min. Res. Ore Res. Est. AusIMM Guide, Mon. 23, pp. 643-52.AustraliaEconomics - geostatistics, ore reserves, exploration, Not specific to diamonds
DS1994-1649
1994
Snowden, V.Snowden, V.Improving predictions by studying realityGeostatistics for the Next Century, pp. 330-337GlobalGeostatistics, Reserve estimation
DS1992-1153
1992
Snowdon, L.R.Osadetz, K.G., Brooks, P.W., Snowdon, L.R.Oil families and their sources in Canadian Williston Basin (southeastern Saskatchewan and southwestern Manitoba)Canadian Petroleum Geologists Bulletin, Vol. 40, No. 3, September pp.254-273Saskatchewan, ManitobaWilliston Basin, Bakken Formation
DS1984-0685
1984
Snyatkova, O.L.Snyatkova, O.L., Pronyagin, N.I., et al.The carbonatite complex of the Khibiny massif and the discovery perspectives of economically important accumulations of natural soda.(Russian)Izves. Akad. Nauk SSSR (Russian), No. 11, pp.124-128RussiaCarbonatite
DS1998-0672
1998
SnyderJacob, D., Jagoutz, E., Zinngrebe, E., Snyder, TaylorComment and reply on the origins of Yakutian eclogite xenolithsJournal of Petrology, Vol. 39, No. 8, Aug. 1, pp. 1527-1539.Russia, YakutiaEclogites, Diamond genesis
DS1998-0728
1998
SnyderKeller, R., Taylor, L., Snyder, Sobolev, Carlson3- D petrography of a Diamondiferous eclogite from Udachnaya Siberia7th International Kimberlite Conference Abstract, pp. 405-7.Russia, SiberiaTomography, petrography, eclogite, Deposit - Udachnaya
DS1998-0729
1998
SnyderKeller, R.A., Remley, D., Snyder, Taylor, SobolevMantle xenoliths from the Obnazhennaya kimberlite, Yakutia7th International Kimberlite Conference Abstract, pp. 402-4.Russia, YakutiaXenoliths, Deposit - Obnazhennaya
DS1998-1375
1998
SnyderSobolev, V.N., Taylor, L.A., Snyder, Jerde, NealMetasomatism of the mantle beneath Yakutia: a quantitative study of secondary chemistry and mineral..7th International Kimberlite Conference Abstract, pp. 835-7.Russia, YakutiaXenoliths, Deposit - Udachnaya
DS1999-0617
1999
SnyderRuzicka, A., Riciputi, Taylor, Snyder, GreenwoodPetrogenesis of mantle derived sulphide inclusions in Yakutian diamonds: chemical and isotopic disequilibriuM.7th International Kimberlite Conference Nixon, Vol. 2, pp. 741-49.Russia, YakutiaQuenching from high temperatures, Deposit - Mir, 23rd., Aikhal, Udachnaya
DS2000-0908
2000
SnyderSobolev, N.V., Sobolev, V.N., Snyder, Yefimova, TaylorSignificance of eclogitic and related parageneses of natural diamonds #2Snyder, Neal, Ernst, Plan. Petrology and Geochemistry, pp. 15-26.GlobalDiamond - morphology, Diamond - genesis
DS2002-0143
2002
SnyderBerman, R., Pehrsson, S.J., Davis, W.J., Snyder, TellaA new model for ca 1.9 Ga tectonometamorphism in the western Churchill province: linked upper crustal thickGac/mac Annual Meeting, Saskatoon, Abstract Volume, P.9., p.9.SaskatchewanTectonic reconstructions
DS2002-0144
2002
SnyderBerman, R., Pehrsson, S.J., Davis, W.J., Snyder, TellaA new model for ca 1.9 Ga tectonometamorphism in the western Churchill province: linked upper crustal thickGac/mac Annual Meeting, Saskatoon, Abstract Volume, P.9., p.9.SaskatchewanTectonic reconstructions
DS2002-1456
2002
SnyderShearer, S., Bankey, Hill, Finn, Daniels, Snyder, RobertsUnited States aeromagnetic database: a companion to the North American magnetic anomaly map.Geological Society of America Annual Meeting Oct. 27-30, Abstract p. 387.United States, CanadaMap - magnetic
DS1995-1788
1995
Snyder, D.Snyder, D., Tait, S.Replenishment of magma chamber: comparison of fluid mechanic experiments with field relationsContributions to Mineralogy and Petrology, Vol. 122, No. 3, pp. 230-240MantleMagma, Genesis
DS1997-1071
1997
Snyder, D.Snyder, D., Crambes, C., Tait, S., Wiebe, R.A.Magma mingling in dikes and sillsJournal of Geology, Vol. 105, No. 1, Jan. pp. 75-86GlobalPetrology - experimental, Composite dikes
DS1998-1242
1998
Snyder, D.Roberts, B., Snyder, D.Upper crustal structures in the Slave Craton near Yellowknife - results from SNORCLE LINE 1.Yellowknife Geoscience Forum Nov. 25-27, p. 94-5. abstractNorthwest TerritoriesCraton, Tectonics
DS1999-0690
1999
Snyder, D.Snyder, D., Hobbs, R.The BIRPS Atlas II: a second decade of deep seismic reflection profilingGeological Society of London, CD-ROM approx. $ 165.00 United StatesEuropeCD-ROM data, Geophysics - seismics, Caledonia Orogen
DS2000-0455
2000
Snyder, D.Jones, A.G., Snyder, D., Asudeh, I., White, D., EatonLithospheric architecture at the Rae Hearne boundary revealed through magnetotelluric and seismic experimentGeological Association of Canada (GAC)/Mineralogical Association of Canada (MAC) 2000 Conference, 6p. abstract.Northwest Territories, Churchill, AlbertaGeophysics - seismics, magnetotellurics, Crustal - boundary
DS2001-0346
2001
Snyder, D.Fumagalli, P., Stixrude, L., Snyder, D.The 10 algorithm phase: a high pressure expandable sheet silicate stable during subduction of hydrated ...Earth and Planetary Science Letters, Vol. 186, No. 2, March 30, pp. 125-42.MantleSubduction, Lithosphere
DS2001-0547
2001
Snyder, D.Jones, A.G., Snyder, D., Ford, K.L., Spratt, J., EvansGeophysical experiments in central Baffin Island29th. Yellowknife Geoscience Forum, Nov. 21-23, abstract p. 38-9.Northwest Territories, Baffin IslandGeophysics, Trans Hudson Orogen
DS2002-0788
2002
Snyder, D.Jones, A.G., Snyder, D., Hanmer, S., Asudeh, I., White, D., Eaton, D., Clarke, G.Magnetotelluric and teleseismic study across the Snowbird Tectonics Zone of theGeophysical Research Letters, Vol. 29, 17, 10.1029/2002GL015359Manitoba, Saskatchewan, AlbertaGeophysics - MT, seismics
DS200512-1012
2005
Snyder, D.Snyder, D., Bellefleur, G.Feasibility study for using high resolution seismic methods to estimate kimberlite deposit volumes at Snap Lake diamond mine, Northwest Territories.Geological Survey of Canada, Current Research 2005-C3, 11p.Canada, Northwest TerritoriesGeophysics - crosshole seismology, vibrating, radar
DS200612-0187
2005
Snyder, D.Bruneton, M., Snyder, D.Probing the lithosphere of the Slave Craton through seismic surface wave analysis.32ndYellowknife Geoscience Forum, POSTERCanada, Northwest TerritoriesGeophysics - seismics
DS200612-1327
2005
Snyder, D.Snyder, D., et al.3-D model of the central Slave Craton.32ndYellowknife Geoscience Forum, p. 70 abstractCanada, Northwest TerritoriesTomography
DS200712-0066
2005
Snyder, D.Bellefleur, G., Matthews, L., Roberts,B., McMonnies, B., Salisbury, M., Snyder, D., Perron, G., McGaughty, J.Downhole seismic imaging of the Victor kimberlite, James Bay Lowlands, Ontario: a feasibility study.Geological Survey of Canada Current Research, 2005- C1, 7p.Canada, OntarioGeophysics - seismics
DS200712-1004
2006
Snyder, D.Snyder, D., Bruneton, M.The latest Slave mantle architecture and more on kimberlite trends.34th Yellowknife Geoscience Forum, p. 53. abstractCanada, Northwest TerritoriesGeophysics - seismics
DS200712-1005
2006
Snyder, D.Snyder, D., Bruneton, M.Mantle structure beneath the Wopmay margin of the Slave: Archean or Proterozoic?34th Yellowknife Geoscience Forum, p. 52. abstractCanada, Northwest TerritoriesGeophysics - seismics
DS201112-0772
2010
Snyder, D.Pawlak, A., Eaton, D.W., Bastow, I.D., Kendall, J-M., Helffrich, G., Wookey, J., Snyder, D.Crustal structure beneath Hudson Bay from ambient noise tomography: implications for basin formation.Geophysical Journal International, Vol. 184, 1, pp. 65-82.Canada, Ontario, Quebec, James Bay LowlandsGeophysics -
DS201312-0856
2013
Snyder, D.Snyder, D.Integrated 3-D models of the Slave & Rae cratons.GEM Diamond Workshop Feb. 21-22, Noted onlyCanada, Northwest Territories, AlbertaGeophysics - seismics
DS201312-0857
2013
Snyder, D.Snyder, D.Lithospheric structure and diamond potential of northern Canada.PDAC 2013, 27 ppt slidesCanada, Nunavut, Northwest TerritoriesTectonics
DS201312-0858
2013
Snyder, D.Snyder, D.Imaging Archean -age whole mineral systems.Precambrian Research, Vol. 229, pp. 125-132.Canada, Northwest TerritoriesSlave craton, metasomatism
DS201708-1767
2017
Snyder, D.Snyder, D.Construction and destruction of some North American cratons.11th. International Kimberlite Conference, OralUnited States, Canadacratons

Abstract: Construction histories of Archean cratons remain poorly understood; their destruction is even less clear because of its rarity, but metasomatic weakening is an essential precursor. By assembling geophysical and geochemical data in 3-D lithosphere models, a clearer understanding of the geometry of major structures within the Rae, Slave and Wyoming cratons of central North America is now possible. Little evidence exists of subducted slab-like geometries similar to modern oceanic lithosphere in these construction histories. Underthrusting and wedging of proto-continental lithosphere is inferred from multiple dipping discontinuities, emphasizing the role of lateral accretion. Archean continental building blocks may resemble the modern lithosphere of oceanic plateau, but they better match the sort of refractory crust expected to have formed at Archean ocean spreading centres. Radiometric dating of mantle xenoliths provides estimates of rock types and ages at depth beneath sparse kimberlite occurrences, and these ages can be correlated to surface rocks. The 3.6–2.6 Ga Rae, Slave and Wyoming cratons stabilized during a granitic bloom at 2.61–2.55 Ga. This stabilization probably represents the final differentiation of early crust into a relatively homogeneous, uniformly thin (35–42 km), tonalite-trondhjemite-granodiorite crust with pyroxenite layers near the Moho atop depleted lithospheric mantle. Peak thermo-tectonic events at 1.86–1.7 Ga broadly metasomatized, mineralized and recrystallized mantle and lower crustal rocks, apparently making mantle peridotite more ‘fertile’ and more conductive by introducing or concentrating sulfides or graphite at 80–120 km depths. This metasomatism may have also weakened the lithosphere or made it more susceptible to tectonic or chemical erosion. Late Cretaceous flattening of Farallon lithosphere that included the Shatsky Rise conjugate appears to have weakened, eroded and displaced the base of the Wyoming craton below 140–160 km. This process replaced the old re-fertilized continental mantle with relatively young depleted oceanic mantle.
DS1998-0875
1998
Snyder, D.B.Line, C.E.R., Hobbs, R.W., Snyder, D.B.Estimates of upper crustal heterogeneity in the Baltic Shield from seismic scattering and borehole logs.Tectonophysics, Vol. 286, No. 1-4, Mar. 10, pp. 171-184.Baltic Shield, Sweden, Norway, FinlandGeophysics - seismic
DS2001-1094
2001
Snyder, D.B.Snyder, D.B., Asudeh, I., Bostock, M.G., Lockhart, G.D.Ongoing teleseismic studies of the Slave Craton29th. Yellowknife Geoscience Forum, Nov. 21-23, abstract p. 78.Northwest Territories, Saskatchewan, AlbertaGeophysics - seismics
DS2001-1095
2001
Snyder, D.B.Snyder, D.B., Berman, R., Jones, A.G., Asudeh, I.Tectonic model for the unroofing of the northeastern Hearne domain based on geophysical petrological....29th. Yellowknife Geoscience Forum, Nov. 21-23, abstract p. 79.Northwest Territories, Saskatchewan, AlbertaTectonics
DS2002-1518
2002
Snyder, D.B.Snyder, D.B.Lithospheric growth at margins of cratonsTectonophysics, Vol. 355, 1-4, pp.7-22.MantleGeophysics - seismics, Subduction
DS2002-1519
2002
Snyder, D.B.Snyder, D.B., Bostock, M.G., Lockhart, G.D.Mantle layers in the Slave Craton30th. Yellowknife Geoscience Forum, Abstracts Of Talks And Posters, Nov. 20-22, p. 63. abstractNorthwest TerritoriesGeophysics - seismics, discontinuity
DS2003-1301
2003
Snyder, D.B.Snyder, D.B.Teleseismic investigations of the lithosphere beneath Central Baffin IslandGeological Survey of Canada Current Research, 2003-C14, 10p.NunavutGeophysics - seismics
DS2003-1302
2003
Snyder, D.B.Snyder, D.B., Bostock, M.G., Lockhart, G.D.Mapping the mantle lithosphere for diamond potential8 Ikc Www.venuewest.com/8ikc/program.htm, Session 9, AbstractMantleCraton studies - geophysics seismics, earthquakes, Review
DS2003-1303
2003
Snyder, D.B.Snyder, D.B., Bostock, M.G., Lockhart, G.D.Two anisotropic layers in the Slave CratonLithos, Vol. 71, 2-4, pp. 529-539.Northwest Territories, NunavutGeophysics - seismics
DS2003-1304
2003
Snyder, D.B.Snyder, D.B., Lockhart, G.D.Toward a mantle stratigraphy beneath the Central Slave Craton31st Yellowknife Geoscience Forum, p. 91. (abst.)Northwest TerritoriesGeophysics - seismics
DS200412-0357
2004
Snyder, D.B.Cook, F.A., Clowes, R.M., Snyder, D.B., Van der Velden, A.J., Hall, K.W., Erdmer, P., Evenchick, C.A.Precambrian crust beneath the Mesozoic northern Canadian Cordillera discovered by lithoprobe seismic reflection profiling.Tectonics, Vol. 23, 2, TC2012 10.1029/2003TC001412Canada, Northwest Territories, British Columbia, YukonGeophysics - seismics
DS200412-1864
2003
Snyder, D.B.Snyder, D.B.Teleseismic investigations of the lithosphere beneath Central Baffin Island.Geological Survey of Canada Current Research, 2003-C14, 10p.Canada, NunavutGeophysics - seismics
DS200412-1865
2003
Snyder, D.B.Snyder, D.B., Bostock, M.G., Lockhart, G.D.Mapping the mantle lithosphere for diamond potential.8 IKC Program, Session 9, AbstractMantleCraton studies - geophysics seismics, earthquakes Review
DS200412-1866
2003
Snyder, D.B.Snyder, D.B., Bostock, M.G., Lockhart, G.D.Two anisotropic layers in the Slave Craton.Lithos, Vol. 71, 2-4, pp. 529-539.Canada, NunavutGeophysics - seismics
DS200412-1867
2003
Snyder, D.B.Snyder, D.B., Lockhart, G.D.Toward a mantle stratigraphy beneath the Central Slave Craton.31st Yellowknife Geoscience Forum, p. 91. (abst.)Canada, Northwest TerritoriesGeophysics - seismics
DS200412-1868
2004
Snyder, D.B.Snyder, D.B., Rondenay, S., Bostock, M.G., Lockhart, G.D.Mapping the mantle lithosphere for diamond potential using teleseismic methods.Lithos, Vol. 77, 1-4, Sept. pp. 859-872.Canada, Northwest TerritoriesSlave Craton, exploration geophysics - seismics, imagin
DS200512-1013
2005
Snyder, D.B.Snyder, D.B.Seismic evidence for the growth of cratonic keels.GAC Annual Meeting Halifax May 15-19, Abstract 1p.Canada, Ontario, Northwest TerritoriesGeophysics - seismics, tectonics, Superior and Slave
DS200512-1014
2005
Snyder, D.B.Snyder, D.B., Lockhart, G.D.Kimberlite trends in NW Canada.Journal of the Geological Society, Vol. 162, 5, pp. 737-740.Canada, Northwest Territories, NunavutBrief overview
DS200512-1015
2004
Snyder, D.B.Snyder, D.B., Lockhart, G.D.Kimberlite trends at the surface and at depth.32nd Yellowknife Geoscience Forum, Nov. 16-18, p.72-73. (talk)Canada, Northwest TerritoriesGeophysics - seismics, SKS, Lac de Gras
DS200512-1016
2005
Snyder, D.B.Snyder, D.B., Lockhart, G.D.Kimberlite trends in NW Canada.Journal of the Geological Society, Vol. 162, 5, pp. 737-740.CanadaHistory
DS200612-1090
2006
Snyder, D.B.Pilkington, M., Snyder, D.B., Hemant, K.Weakly magnetic crust in the Canadian Cordillera.Earth and Planetary Science Letters, Vol. 248, 1-2, Aug. 15, pp. 461-470.Canada, British ColumbiaGeophysics - magnetics
DS200712-0909
2006
Snyder, D.B.Rondenay, S., Snyder, D.B., Chen, C.W., Straub, K.M., Bank, C.G., Bostock, M.G.Insight into the assembly and evolution of the Slave Craton from teleseismic dat a analyses.Geochimica et Cosmochimica Acta, In press availableCanada, Northwest TerritoriesGeophysics - seismics
DS200712-1006
2007
Snyder, D.B.Snyder, D.B.Stacked uppermost mantle layers within the Slave Craton of NW Canada as defined by anisotropic seismic discontinuities.Geological Association of Canada, Gac-Mac Yellowknife 2007, May 23-25, Volume 32, 1 pg. abstract p.76-77,Canada, Northwest TerritoriesGeophysics - seismics
DS200812-1086
2008
Snyder, D.B.Snyder, D.B.Mantle structures in the Slave and Rae Cratons inferred from seismic discontinuities.Northwest Territories Geoscience Office, p. 58. abstractCanada, Northwest TerritoriesBrief overview - cratons
DS200812-1087
2008
Snyder, D.B.Snyder, D.B.Stacked uppermost mantle layers within the Slave Craton of NW Canada as defined by anisotropic seismic discontinuities.Tectonics, Vol. 27, TC4006Canada, Northwest TerritoriesGeophysics - seismics
DS200812-1088
2008
Snyder, D.B.Snyder, D.B.Stacked uppermost mantle layers within the Slave Craton of NW Canada as defined by anisotropic seismic discontinuities.Tectonics, Vol. 27, 4, TC4006Canada, Northwest TerritoriesGeophysics - seismics
DS200812-1089
2008
Snyder, D.B.Snyder, D.B.New passive, teleseismological exploration tools to aid the diamond exploration industry.KEGS Shortcourse on Geophysics at PDAC March 1, 5p. plus 35 power pt. slidesTechnologyGeophysics - seismics
DS200912-0386
2009
Snyder, D.B.Kjarsgaard, B.A., Snyder, D.B.The GEM diamond project: an overview.37th. Annual Yellowknife Geoscience Forum, Abstracts p. 33-4.Canada, Northwest Territories, NunavutMantle lithosphere
DS200912-0577
2009
Snyder, D.B.Pedersen, H.A., Fishwick, S., Snyder, D.B.A comparison of cratonic roots through consistent analysis of seismic surface waves.Lithos, Vol. 109, 1-2, pp. 81-95.MantleGeophysics - seismics
DS200912-0705
2009
Snyder, D.B.Snyder, D.B., Kopylova, M.G.Seismically anisotropic subcontinental mantle lithosphere caused by metasomatic wehrlite pyroxenite dyke stockworks.GAC/MAC/AGU Meeting held May 23-27 Toronto, Abstract onlyCanada, Northwest TerritoriesLac de Gras field
DS201012-0066
2010
Snyder, D.B.Bostock, M.G., Eaton, D.W., Snyder, D.B.Teleseismic studies of the Canadian landmass: lithoprobe and its legacy.Canadian Journal of Earth Sciences, Vol. 47, 4, pp. 445-461.CanadaGeophysics - seismic
DS201012-0392
2010
Snyder, D.B.Kjarsgaard, B.A., Snyder, D.B.The GEM diamond project: an update of 2010 activities and a view forward to 2011.38th. Geoscience Forum Northwest Territories, Abstract p. 56.Canada, Northwest TerritoriesGEM database
DS201012-0731
2010
Snyder, D.B.Snyder, D.B., Grutter, H.S.Lithoprobes impact on the Canadian diamond exploration industry.Canadian Journal of Earth Sciences, Vol. 47, 5, pp. 783-800.CanadaGeophysics
DS201012-0732
2009
Snyder, D.B.Snyder, D.B., Lockhart, G.Does seismically anisotropic subcontinental mantle lithosphere require metasomatic wehrlite pyroxenite dyke stockworks?Lithos, Vol. 112 S pp. 961-965.Canada, Northwest TerritoriesSlave Craton
DS201012-0786
2010
Snyder, D.B.Thompson, D.A., Bastow, I.D., Helffich, G., Kendall, J.M., Wookey, J., Snyder, D.B., Eaton, D.W.Precambrian crustal evolution: seismic constraints from the Canadian Shield.Earth and Planetary Science Letters, Vol. 297, 3-4, pp. 655-666.CanadaGeophysics - seismics
DS201112-0066
2011
Snyder, D.B.Bastow, I.D., Thompson, D.A., Wookey, J., Kendall, J-M., Helffrich, G., Snyder, D.B., Eaton, D.W., Darbyshire, F.A.Precambrian plate tectonics: seismic evidence from northern Hudson Bay, Canada.Geology, Vol. 39, 1, pp. 91-94.Canada, Ontario, Quebec, Manitoba, Northwest TerritoriesGeophysics - seismics
DS201112-1039
2011
Snyder, D.B.Thompson, D.A., Helffich, G., Bastow, L.D., Kendall, J-M., Wookey, J., Eaton, D.W., Snyder, D.B.Implications of a simple mantle transition zone beneath cratonic North America.Earth and Planetary Science Letters, Vol. 312, pp. 28-36.Canada, United StatesCraton, convective flow
DS201212-0060
2012
Snyder, D.B.Bastow, I.D., Kendall, J.M., Brisbourne, A.M., Snyder, D.B., Thompson, D., Hawthorne, D., Hefffrich, G.R., Wookey, J., Horleston, A., Eaton, D.The Hudson Bay lithospheric experiment.Astronomy and Geophysics, pp. 6.21-6.24.Canada, Ontario, QuebecGeophysics - seismics
DS201212-0680
2012
Snyder, D.B.Snyder, D.B., Berman, R.G., Kendall, J.M., Sanborn-Barrie, M.Seismic anisotropy and mantle structure of the Rae craton, central Canada, from joint interpretation of SKS splitting and receiver functions.10th. International Kimberlite Conference Held Bangalore India Feb. 6-11, Poster abstractCanada, Saskatchewan, Northwest TerritoriesGeophysics - seismics
DS201312-0859
2013
Snyder, D.B.Snyder, D.B., Berman, R.G., Kendall, J-M., Sanborn-Barrie, M.Seismic anisotropy and mantle structure of the Rae craton, central Canada, from joint interpretation of SKS splitting and receiver functions.Precambrian Research, Vol. 232, pp. 189-208.Canada, Ontario, Hudson Bay, Baffin IslandMantle discontinuities
DS201312-0860
2013
Snyder, D.B.Snyder, D.B., Hillier, M., Kjarsgaard, B.A.3-D structural model of the Slave craton mantle lithosphere, Northwest Territories.Geoscience Forum 40 NWT, abstract only p. 47.Canada, Northwest TerritoriesTectonics
DS201312-0861
2013
Snyder, D.B.Snyder, D.B., Kjarsgaard, B.A.Mantle roots of major Precambrian shear zones inferred from structure of the Great Slave Lake shear zone, northwest Canada.Lithosphere, Vol. 5, 6, pp. 539-546.Canada, Northwest TerritoriesStructure - craton
DS201412-0857
2014
Snyder, D.B.Snyder, D.B.Lithospheric structure and diamond potential of northern Canada.2014 Yellowknife Geoscience Forum, p. 71, abstractCanada, Northwest TerritoriesGeophysics - seismic
DS201412-0858
2014
Snyder, D.B.Snyder, D.B., Hillier, M.J., Kjarsgaard, B.A., de Kemp, E.A., Craven, J.A.Lithospheric architecture of the Slave Craton, northwest Canada, as determined from an inter disciplinary 3-D model.Geochemistry, Geophysics, Geosystems: G3, Vol. 15, DOI: 10:1002/2013 GC005168Canada, Northwest TerritoriesTectonics
DS201412-0860
2013
Snyder, D.B.Snyder, D.B., Kjarsgaard, B.A.Mantle roots of major Precambrian shear zones inferred from structure of the Great Slave Lake shear zone.Lithosphere, Vol. 5, no. 6, pp. 539-546.Canada, Northwest TerritoriesGeophysics - seismics
DS201412-0878
2013
Snyder, D.B.Spratt, J.E., Skulski, T., Craven, J.A., Jones, A.G., Snyder, D.B., Kiyan, D.Magnetotelluric investigations of the lithosphere beneath the central Rae craton, maIn land Nunavut, Canada.Journal of Geophysical Research, Vol. 119, pp. 2415-2439.Canada, NunavutGeophysics - magnetotellurics
DS201503-0136
2015
Snyder, D.B.Bastow, I.D., Eaton, D.W., Kendall, J-M., Helffrich, G., Snyder, D.B., Thompson, D.A., Wookey, J., Darbyshire, F.A., Pawlak, A.E.The Hudson Bay lithospheric experiment ( HuBLE): insights into Precambrian plate tectonics and the development of mantle keels.Geological Society of London Special Publication: Continent formation through time., No. 389, pp. 41-67.Canada, Ontario, QuebecGeotectonics

Abstract: Hudson Bay Lithospheric Experiment (HuBLE) was designed to understand the processes that formed Laurentia and the Hudson Bay basin within it. Receiver function analysis shows that Archaean terranes display structurally simple, uniform thickness, felsic crust. Beneath the Palaeoproterozoic Trans-Hudson Orogen (THO), thicker, more complex crust is interpreted as evidence for a secular evolution in crustal formation from non-plate-tectonic in the Palaeoarchaean to fully developed plate tectonics by the Palaeoproterozoic. Corroborating this hypothesis, anisotropy studies reveal 1.8 Ga plate-scale THO-age fabrics. Seismic tomography shows that the Proterozoic mantle has lower wavespeeds than surrounding Archaean blocks; the Laurentian keel thus formed partly in post-Archaean times. A mantle transition zone study indicates ‘normal’ temperatures beneath the Laurentian keel, so any cold mantle down-welling associated with the regional free-air gravity anomaly is probably confined to the upper mantle. Focal mechanisms from earthquakes indicate that present-day crustal stresses are influenced by glacial rebound and pre-existing faults. Ambient-noise tomography reveals a low-velocity anomaly, coincident with a previously inferred zone of crustal stretching, eliminating eclogitization of lower crustal rocks as a basin formation mechanism. Hudson Bay is an ephemeral feature, caused principally by incomplete glacial rebound. Plate stretching is the primary mechanism responsible for the formation of the basin itself.
DS201601-0045
2015
Snyder, D.B.Snyder, D.B., Craven, J.A., Pilkington, M., Hillier, M.J.The three dimensional construction of the Rae craton, central Canada.Geochemistry, Geophysics, Geosystems: G3, Vol. 16, 10, pp. 3555-3574.Canada, Saskatchewan, AlbertaRae Craton

Abstract: Reconstruction of the 3-dimensional tectonic assembly of early continents, first as Archean cratons and then Proterozoic shields, remains poorly understood. In this paper, all readily available geophysical and geochemical data are assembled in a 3-D model with the most accurate bedrock geology in order to understand better the geometry of major structures within the Rae craton of central Canada. Analysis of geophysical observations of gravity and seismic wave speed variations revealed several lithospheric-scale discontinuities in physical properties. Where these discontinuities project upward to correlate with mapped upper crustal geological structures, the discontinuities can be interpreted as shear zones. Radiometric dating of xenoliths provides estimates of rock types and ages at depth beneath sparse kimberlite occurrences. These ages can also be correlated to surface rocks. The 3.6-2.6 Ga Rae craton comprises at least three smaller continental terranes, which "cratonized" during a granitic bloom. Cratonization probably represents final differentiation of early crust into a relatively homogeneous, uniformly thin (35-42 km), tonalite-trondhjemite-granodiorite crust with pyroxenite layers near the Moho. The peak thermotectonic event at 1.86-1.7 Ga was associated with the Hudsonian orogeny that assembled several cratons and lesser continental blocks into the Canadian Shield using a number of southeast-dipping megathrusts. This orogeny metasomatized, mineralized, and recrystallized mantle and lower crustal rocks, apparently making them more conductive by introducing or concentrating sulfides or graphite. Little evidence exists of thin slabs similar to modern oceanic lithosphere in this Precambrian construction history whereas underthrusting and wedging of continental lithosphere is inferred from multiple dipping discontinuities.
DS201701-0033
2017
Snyder, D.B.Snyder, D.B., Humphreys, E., Pearson, D.G.Construction and destruction of some North American cratons. Rae, Slave, WyomingTectonophysics, Vol. 694, pp. 464-486.United States, CanadaMetasomatism

Abstract: Construction histories of Archean cratons remain poorly understood; their destruction is even less clear because of its rarity, but metasomatic weakening is an essential precursor. By assembling geophysical and geochemical data in 3-D lithosphere models, a clearer understanding of the geometry of major structures within the Rae, Slave and Wyoming cratons of central North America is now possible. Little evidence exists of subducted slab-like geometries similar to modern oceanic lithosphere in these construction histories. Underthrusting and wedging of proto-continental lithosphere is inferred from multiple dipping discontinuities, emphasizing the role of lateral accretion. Archean continental building blocks may resemble the modern lithosphere of oceanic plateau, but they better match the sort of refractory crust expected to have formed at Archean ocean spreading centres. Radiometric dating of mantle xenoliths provides estimates of rock types and ages at depth beneath sparse kimberlite occurrences, and these ages can be correlated to surface rocks. The 3.6-2.6 Ga Rae, Slave and Wyoming cratons stabilized during a granitic bloom at 2.61-2.55 Ga. This stabilization probably represents the final differentiation of early crust into a relatively homogeneous, uniformly thin (35-42 km), tonalite-trondhjemite-granodiorite crust with pyroxenite layers near the Moho atop depleted lithospheric mantle. Peak thermo-tectonic events at 1.86-1.7 Ga broadly metasomatized, mineralized and recrystallized mantle and lower crustal rocks, apparently making mantle peridotite more ‘fertile’ and more conductive by introducing or concentrating sulfides or graphite at 80-120 km depths. This metasomatism may have also weakened the lithosphere or made it more susceptible to tectonic or chemical erosion. Late Cretaceous flattening of Farallon lithosphere that included the Shatsky Rise conjugate appears to have weakened, eroded and displaced the base of the Wyoming craton below 140-160 km. This process replaced the old re-fertilized continental mantle with relatively young depleted oceanic mantle.
DS201808-1751
2018
Snyder, D.B.Harris, G.A., Pearson, D.G., Liu, J., Hardman, M.F., Snyder, D.B., Kelsch, D.Mantle composition, age and geotherm beneath the Darby kimberlite field, west central Rae craton.Mineralogy and Petrology, doi.org/10.1007/s00710-018-0609-4 14p.Canada, Northwest Territoriesdeposit - Darby

Abstract: New geological and geophysical research on Canada’s Rae craton are providing an increasingly good baseline for diamond exploration. This study uses mantle xenoliths and xenocrysts from the Darby property, located ~200 km southwest of the community of Kugaaruk, Nunavut, to provide new information on the lithospheric mantle and diamond potential of the western portion of the central Rae. Peridotite xenoliths containing enough fresh olivine have a median Mg# value of 92.5, indistinguishable from the median value of 92.6 typical of cratonic peridotites world-wide. Only of the 14 peridotitic xenoliths contain fresh garnet. Of these, garnet in one sample is classified as harzburgitic (G10), giving a minimum pressure of 4.7 GPa using the P38 geobarometer (38 mW/m2 model geothermal gradient), while garnets from three peridotites are classified as lherzolitic (G9). 52 garnets picked from concentrate have lherzolitic affinities. Lherzolitic diopsides from kimberlite heavy mineral concentrate yield a lithospheric thickness of ~ 200 km. The four garnet peridotite xenoliths and 49 peridotitic garnets from concentrate yield two distinct modes in mantle sampling depths using Ni thermometry, when projected to the Cpx geotherm. A cluster of samples from the higher Ca/Cr lherzolitic garnets equilibrated at 765 to 920 °C with a group of peridotitic garnets (50 % of xenoliths and 28 % of concentrate) from the lower Ca/Cr lherzolitic garnets with anomalously high Ti concentrations yielding super-adiabatic TNi values The aluminum-in-olivine thermometer applied to olivines filtered to be “garnet facies yielded a mantle sampling portion of the mantle cargo from the diamond stability field. A suite of pyroxenitic xenoliths are a feature of each Darby kimberlite target. New screening techniques indicate that these rocks likely originate close to the crust mantle boundary. Osmium isotope analyses of the Darby peridotites reveal whole-rock Re-depletion ages ranging from Mesoarchean to Paleoproterozoic. The pyroxenite xenoliths have very radiogenic Os isotope compositions and provide the first age information from pyroxenites/“eclogites” beneath the Rae craton. Their resulting Archean whole rock TMA ages are consistent with a Mesoarchean age of the western Central Rae lithosphere older than the lithosphere beneath the Repulse Bay block in the East section of the Rae craton (Liu et al., 2016. Precambrian Research 272). The highly depleted olivine compositions, thick cold lithosphere, and Archean ages of the Darby peridotite xenoliths clearly indicate the presence of 200 km thick cold cratonic lithospheric mantle beneath the western segment of the central Rae craton circa 540 Ma. The Archean model ages of most of the pyroxenites support this, notwithstanding the fact that some of these rocks could be sampling either crust or mantle lithologies very close to the crust-mantle boundary. Mantle sampling took place well into the diamond stability field at Darby.
DS201809-2093
2018
Snyder, D.B.Snyder, D.B., Schetselaar, E., Pilkington, M., Schaeffer, A.J.Resolution and uncertainty in lithospheric 3-D geological models. Canada MohoMineralogy and Petrology, doi.org/10.1007/ s00710-018-0619-2. 15p.MantleGeophysics

Abstract: As three-dimensional (3-D) modelling of the subcontinental mantle lithosphere is increasingly performed with ever more data and better methods, the robustness of such models is increasingly questioned. Resolution thresholds and uncertainty within deep multidisciplinary 3-D models based on geophysical observations exist at a minimum of three levels. Seismic waves and potential field measurements have inherent limitations in resolution related to their dominant wavelengths. Formal uncertainties can be assigned to grid-search type forward or inverse models of observable parameter sets. Both of these uncertainties are typically minor when compared to resolution limitations related to the density and shape of a specific observation array used in seismological or potential field surveys. Seismic wave source distribution additionally applies in seismology. A fourth, more complex level of uncertainty relates to joint inversions of multiple data sets. Using independent seismic wave phases or combining diverse methods provides another measure of uncertainty of particular physical properties. Extremely sparse xenolith suites provide the only direct correlation of rock type with observed or modelled physical properties at depths greater than a few kilometers. Here we present one case study of the Canadian Mohorovicic (Moho) discontinuity using only two data sets. Refracted and converted seismic waves form the primary determinations of the Moho depth, gravity field modeling provide a secondary constraint on lateral variations, the slope of the Moho, between the sparse seismic estimates. Although statistically marginal, the resulting co-kriged Moho surface correlates better with surface geology and is thus deemed superior.
DS202107-1134
2021
Snyder, D.B.Snyder, D.B., Savard, G., Kjarssgaard, B.A., Vaillancourt, A., Thurston, P.C., Ayer, J.A., Roots, E.Multidisciplinary modeiling of mantle lithosphere structure within the Superior craton, North America.Geochemistry, Geophysics, Geosytems, 20p. PdfCanada, United Statesgeophysics - seismics

Abstract: Structure within the Earth is best studied in three dimensions and using several coincident overlays of diverse information with which one can best see where unusual properties match up. Here we use regional surfaces causing discontinuities in seismic waves a few hundred kilometers deep in the Earth, intersected and thus calibrated by rebuilt rock columns using rare rock samples erupted to the surface in two locations. Electrically conductive regions can be mapped using natural (magnetotelluric) currents. East- and west-dipping seismic discontinuity surfaces match surface structures that developed about 1.8 billion years ago marginal to the Superior crustal block. Surfaces dipping to the southeast and northwest match some boundaries between crustal blocks that are over 2.5 billion years old, but many such crustal boundaries trend more east-west. Conductive rocks appear more commonly above these discontinuity surfaces where gas-rich fluids apparently flowed and that the discontinuities somehow filtered these fluids. The mismatch in orientation and dip between the most ancient deep and exposed structures suggests that plate tectonic processes operating today differed earlier than 2.5 billion years ago.
DS1960-0600
1965
Snyder, F.G.Snyder, F.G., Gerdeman, P.E.Explosive Igneous Activity Along an Illinois Missouri Kansas Axis.American Journal of Science, Vol. 263, PP. 465-493.Appalachia, United States, Illinois, Missouri, Kansas, Central StatesMid-continent, Structure, Tectonics
DS1960-1028
1968
Snyder, F.G.Snyder, F.G.Tectonic History of Mid-continental United StatesUniversity MISSOURI Bulletin., No. 1, PP. 65-77.GlobalMid-continent
DS1970-0192
1970
Snyder, F.G.Snyder, F.G.Structural Lineaments and Mineral Deposits, Eastern United SAmerican Institute of Mining, Metallurgical, and Petroleum Engineers (AIME), PP. 76-94.GlobalMid-continent
DS1998-1444
1998
Snyder, G.Taylor, L.A., Bulanova, G., Snyder, G., Keller, R.Multiple inclusions in diamonds: evidence for complex petrogenesis7th International Kimberlite Conference Abstract, pp. 883-5.Russia, Siberia, YakutiaDiamond morphology, chemistry, inclusions, Deposit - Mir
DS1999-0535
1999
Snyder, G.Patel, S.C., Frost, C.D., Chamberlain, K.R., Snyder, G.Proterozoic metamorphism and uplift history of the north central LaramieMountains, Wyoming.Journal of Metamorphic Geology, Vol. 17, pp. 243-58.WyomingMetamorphic terranes, Geothermometry, geochronology
DS1992-1440
1992
Snyder, G.A.Snyder, G.A., et al.neodymium and Strontium isotopes from Diamondiferous eclogites, Yakutia, Siberia: evidence for an old depleted mantle protolith.Eos, Transactions, Annual Fall Meeting Abstracts, Vol. 73, No. 43, October 27, abstracts p. 656.Russia, SiberiaMantle, Geochronology
DS1993-0462
1993
Snyder, G.A.Fraracci, K.N., Taylor, L.A., Jerde, E.A., Snyder, G.A., ClaytonTwo unusual Diamondiferous eclogite xenoliths from the Mir kimberlite inYakutia, SiberiaGeological Society of America Annual Abstract Volume, Vol. 25, No. 6, p. A445 abstract onlyRussia, Siberia, YakutiaXenoliths -eclogite, Deposit -Mir
DS1993-1493
1993
Snyder, G.A.Snyder, G.A., Jerde, E.A., Taylor, L.A., Halliday, A.N., Sobolevneodymium and Strontium isotopes from Diamondiferous eclogites, UdachnayaEarth and Planetary Science Letters, Vol. 118, No. 1-4, July, pp. 91-100.Russia, Siberia, YakutiaGeochronology, Deposit -Udachnaya
DS1993-1494
1993
Snyder, G.A.Snyder, G.A., Jerde, E.A., Taylor, L.A., Sobolev, N.V.Earliest differentiation of the earth's mantle: evidence from the isotopic studies of Diamondiferous eclogites, Yakutia, Siberia, Russia.Geological Society of America Annual Abstract Volume, Vol. 25, No. 6, p. A73 abstract onlyRussia, Yakutia, RussiaGeochronology, Eclogites
DS1993-1495
1993
Snyder, G.A.Snyder, G.A., Taylor, L.A., Jerde, E.A., et al.Petrogenesis of garnet pyroxenite and spinel peridotite xenoliths of the Tell Danun alkali basalt volcano.International Geology Review, Vol. 35, No. 12, Dec. pp. 1104-1120.SyriaXenoliths, Harrat As Shamah area
DS1994-1348
1994
Snyder, G.A.Pearson, D.G., Snyder, G.A., Shirley, S.B., Taylor, L.A.Rhenium- Osmium (Re-Os) isotope evidence for a mid-Archean age of Diamondiferous eclogite xenoliths -Udachnaya.Mineralogical Magazine, Vol. 58A, pp. 705-706. AbstractRussia, YakutiaGeochronology, Deposit -Udachnaya
DS1994-1658
1994
Snyder, G.A.Sobolev, V.N., Taylor, L.A., Snyder, G.A., Sobolev, N.V.Diamondiferous eclogites from the Udachnaya kimberlite pipe, YakutiaInternational Geology Review, Vol. 36, No. 1, Jan. pp. 42-64.Russia, YakutiaEclogites, Deposit -Udachnaya
DS1995-0123
1995
Snyder, G.A.Beard, B.L., Snyder, G.A., Taylor, L.A., Fraracci, et al.Eclogites from the Mir kimberlite, Russia: evidence of an Archean ophioliteprotolith.Proceedings of the Sixth International Kimberlite Conference Extended Abstracts, p. 41-43.Russia, Yakutia, Malo-BotubaEclogites, Deposit -Mir
DS1995-0124
1995
Snyder, G.A.Beard, B.L., Taylor, L.A., Snyder, G.A.Compositional similarities between eclogites from different geologicsettings: Archean and Phanerozoic.Geological Society of America (GSA) abstract, Vol. 27, No. 2, March p. 36.GlobalEclogites
DS1995-1462
1995
Snyder, G.A.Pearson, D.G., Snyder, G.A., Shirey, S.B., Taylor, L.A.Archean Rhenium- Osmium (Re-Os) age for Siberian eclogites and constraints on Archeantectonics.Nature, Vol. 374, No. 6524, April 20, pp. 711-713.Russia, Siberia, RussiaGeochronology, Eclogites
DS1995-1789
1995
Snyder, G.A.Snyder, G.A.Petrology and chemistry of an Early Proterozoic lherzolite -anorthosite pluton of the White Sea complexInternational Geology Review, Vol. 37, No. 6, June, pp. 547-562Europe, KareliaPetrology, Lherzolite
DS1995-1790
1995
Snyder, G.A.Snyder, G.A., Taylor, L.A., Beard, B.L., Sobolev, N.V.Siberian eclogite xenoliths: keys to differentiation of the Archeanmantle.Proceedings of the Sixth International Kimberlite Conference Abstracts, pp. 549-551.Russia, YakutiaEclogite xenoliths, Deposit -Udachnaya. Mir
DS1995-1791
1995
Snyder, G.A.Snyder, G.A., Taylor, L.A., Jerde, E.A., Clayton, MayedaArchean mantle heterogeneity and origin of Diamondiferous eclogites:evidence hydroxyl in garnets.American Mineralogist, Vol. 80, July-Aug. No. 7-8, pp. 799-809.GlobalGeochronology, Eclogites
DS1995-1797
1995
Snyder, G.A.Sobolev, V.N., Taylor, L.A., Snyder, G.A., Sobolev, N.V.Diamondiferous eclogites from the Siberian Platform: samples with peridotitic signature? #2Proceedings of the Sixth International Kimberlite Conference Abstracts, pp. 552-554.Russia, SiberiaEclogites, Peridotites
DS1995-1799
1995
Snyder, G.A.Sobolev, V.N., Taylore, L.A., Snyder, G.A., PokhilenkoA unique metasomatised peridotite xenolith from the Mir kimberlite, Siberian PlatformProceedings of the Sixth International Kimberlite Conference Abstracts, pp. 555-557.Russia, SiberiaXenolith -peridotite, Deposit -Mir
DS1995-1877
1995
Snyder, G.A.Taylor, L.A., Snyder, G.A.Diamondiferous eclogite xenoliths from kimberlites: a mantle or crustalorigin?Geological Society of America (GSA) abstract, Vol. 27, No. 2, March p. 91.South Africa, Russia, YakutiaEclogites, Mantle, crust
DS1996-1337
1996
Snyder, G.A.Snyder, G.A., Taylor, L.A.Diamond genesis in Archean Yakutian eclogites, SiberiaGeological Society of America, Abstracts, Vol. 28, No. 7, p. A-290.Russia, SiberiaEclogites, Diamond genesis
DS1996-1403
1996
Snyder, G.A.Taylor, L.A., Snyder, G.A., Sobolev, N.V.Eclogitic inclusions in diamonds: evidence of complex mantle processes overtime.Earth and Planetary Science Letters, Vol. 142, No. 3/4, Aug. 1, pp. 535-552.RussiaEcologites, Diamond inclusions
DS1996-1404
1996
Snyder, G.A.Taylor, L.A., Valley, J.W., Clayton, R.N., Snyder, G.A.Oxygen isotopes by laser-heating and conventional techniques a study of Siberian Diamondiferous eclogitesInternational Geological Congress 30th Session Beijing, Abstracts, Vol. 1, p. 106.Russia, SiberiaGeochronology, Eclogites
DS1997-1072
1997
Snyder, G.A.Snyder, G.A., Taylor, L.A., Sobolev, N.V.The origins of Yakutian eclogite xenolithsJournal of Petrology, Vol. 38, No. 1, Jan. 1, pp. 85-114.Russia, YakutiaEclogite, Xenolith
DS1998-1366
1998
Snyder, G.A.Snyder, G.A., Keller, R.A., Taylor, L.A., Remley, D.The origin of ultramafic (Group A) eclogites: neodymium and Strontium isotopic evidence from the Obnazhennaya kimberlite.7th International Kimberlite Conference Abstract, pp. 823-5.Russia, YakutiaEclogite xenoliths, Deposit - Obnazhennaya
DS1998-1367
1998
Snyder, G.A.Snyder, G.A., Taylor, L.A., Beard, B.L., HallidayThe diamond bearing Mir eclogites, neodymium and Strontium isotopic evidence for continental crustal input Archean Oceanic7th International Kimberlite Conference Abstract, pp. 826-8.Russia, YakutiaEclogites, Deposit - Mir
DS1998-1371
1998
Snyder, G.A.Sobolev, N.V., Snyder, G.A., et al.Extreme chemical diversity in the mantle during eclogitic diamondformation: evidence from inclusions..International Geology Review, Vol. 40, No. 7, pp. 567-578.Russia, YakutiaDiamond inclusions, mineral chemistry, Deposit - Mir
DS1999-0570
1999
Snyder, G.A.Promprated, P., Taylor, L. A., Snyder, G.A.Petrochemistry of the mantle beneath Thailand: evidence from peridotitexenoliths.International Geology Review, Vol. 41, No. 6, June pp. 506-30.GlobalPeridotite, Xenoliths - not specific to diamonds
DS1999-0691
1999
Snyder, G.A.Snyder, G.A., Taylor, Beard, Halliday, Sobolev, SimakovThe diamond bearing Mir eclogites: neodymium Strontium isotopic evidence for a possible early to Mid Proterozoic source7th International Kimberlite Conference Nixon, Vol. 2, pp. 808-15.Russia, Siberia, YakutiaDepleted mantle source with arc affinity, Mineral chemistry, geothermometry
DS2000-0949
2000
Snyder, G.A.Taylor, L.A., Keller, R.A., Snyder, G.A., Wang, W., et al.Diamonds and their mineral inclusions and that they tell us: detailed pullapart a Diamondiferous eclogiteInternational Geology Review, Vol. 42, No. 11, Nov. pp. 959-83.Russia, YakutiaDiamond - morphology, eclogite, Mineral chemistry, cathodluminescence
DS2003-1365
2003
Snyder, G.A.Taylor, L.A., Snyder, G.A., Keller, R., Remley, D.A., Anand. M., Wiesli, R.Petrogenesis of Group A eclogites and websterites: evidence from the ObnazhennayaContributions Mineralogy and Petrology, Vol.Russia, YakutiaPetrology, genesis, Deposit - Obnazhennaya
DS200412-1974
2003
Snyder, G.A.Taylor, L.A., Snyder, G.A., Keller, R., Remley, D.A., Anand,M., Wiesli, R., Valley, J., Sobolev, N.V.Petrogenesis of Group A eclogites and websterites: evidence from the Obnazhennaya kimberlite, Yakutia.Contributions to Mineralogy and Petrology, Vol. 145, pp. 424-443.Russia, YakutiaPetrology, genesis Deposit - Obnazhennaya
DS1989-1417
1989
Snyder, G.L.Snyder, G.L., Hall, R.P., Hughes, D.J., Ludwig, K.R.Mafic intrusives in Precambrian rocks of the Wyoming Province and BeltBasinNew Mexico Bureau of Mines Bulletin., Continental Magmatism Abstract Volume, Held, Bulletin. No. 131, p. 249. AbstractWyomingUltramafic
DS1990-1385
1990
Snyder, G.L.Snyder, G.L.Early Precambrian basic rocks of the USAHall, R.P., Hughes, D.K., editors, Early Precambrian Basic, pp. 191-220Minnesota, Wisconsin, WyomingBasic/ultrabasic, Precambrian
DS1993-0232
1993
Snyder, G.L.Chamberlain, K.R., Patel, S.C., Frost, B.R., Snyder, G.L.Thick skinned deformation of the Archean Wyoming province during Proterozoic arc-continent collision.Geology, Vol. 21, No. 11, November pp. 995-998.Colorado, WyomingTectonics, Deformation -Cheyenne boundary
DS2002-1664
2002
Snyder, K.Vicenzi, E.P., Heaney, P.J., Snyder, K.Radiation halos, a rare microstructure in diamonds from the Central African RepublicEos, American Geophysical Union, Spring Abstract Volume, Vol.83,19, 1p.Central African RepublicDiamond - morphology, carbonado
DS1992-1441
1992
Snyder, M.T.Snyder, M.T.Exploration equipment. the drive for mining efficiency includesexplorationEngineering and Mining Journal, Vol. 193, No. 7, July pp. 38-41GlobalMining equipment, Exploration uses
DS1994-1650
1994
Snyder, M.T.Snyder, M.T.Exploration, exploitation, the processes between and beyond... overview of Mining industry's goalEngineering and Mining Journal, Vol. 195, No. 1, January pp.WW 30-32United States, CanadaEconomics, Exploration activities
DS1991-1093
1991
Snyder, S.L.McCarten, L., Snyder, S.L., Stover, C.W.Map showing the relationship to selected mafic and ultramafic bodies in the crust of the eastern United States to seismically active areasUnited States Geological Survey (USGS) Map, No. MF-2143, 1, 2, 500, 000 $ 3.50AppalachiaMafic, ultramafics, Seismics
DS1997-0159
1997
Snyder, S.L.Cannon, W.F., Daniels, D.L., Snyder, S.L.New aeromagnetic map of the Midcontinent rift in northwestern Wisconsin and adjacent Minnesota.Geological Society of America (GSA) Abstracts, Vol. 29, No. 4, Apr. p. 9.Wisconsin, MinnesotaGeophysics - aeromagnetics, Tectonics
DS2002-0348
2002
Snyder, S.L.Daniels, D.L., Snyder, S.L.Wisconsin aeromagnetic and gravity maps and data: a web site for distribution of dataU.s. Geological Survey, OF 02-0230 58p. http://pubs.usgs.gov/of/2002/of02-498WisconsinBlank
DS200412-0402
2002
Snyder, S.L.Daniels, D.L., Snyder, S.L.Wisconsin aeromagnetic and gravity maps and data: a web site for distribution of data.U.S. Geological Survey, OF 02-0230 58p.United States, WisconsinMap - geophysics
DS1995-1798
1995
Snyderm G.A.Sobolev, V.N., Taylor, L.A., Snyderm G.A.Diamondiferous eclogites and peridotites: are there petrogeneticrelationships?Geological Society of America (GSA) abstract, Vol. 27, No. 2, March p. 88.RussiaEclogites, Deposit -Mir
DS1995-1878
1995
Snyer, G.A.Taylor, L.A., Snyer, G.A., Sobolev, V.N.Trace element chemistry of eclogitic inclusions in diamond and comparisons with host eclogite, Mir.Proceedings of the Sixth International Kimberlite Conference Abstracts, pp. 625-627.Russia, YakutiaGeochemistry -eclogite, Deposit -Mir
DS1970-0994
1974
Snyman, C.P.Snyman, C.P.Possible Classification Parameters of South Africa Kimberlites.Geological Society of South Africa Transactions, Vol. 77, No. 2, PP. 85-91.South AfricaKimberlite Genesis
DS1993-1009
1993
Snyman, C.P.McNerney, N., Dippenaar, K., Snyman, C.P., Begg, E.J.B.The geology of the Greenview lamprophyric breccia ventSouth African Journal of Geology, Vol. 95, No. 5-6, pp. 194-202South AfricaBreccia, Alkaline rocks
DS1998-1368
1998
Snyman, J.E.W.Snyman, J.E.W.Gemstones... precious stones of interest ( not diamonds)South Africa Council, Handbook # 16, pp. 282-293.South AfricaEconomic - history, areas, Gemstones
DS200712-0592
2007
Snyman, L.W.Lamprecht, G.H., Human, H.G.C., Snyman, L.W.Detection of diamond in ore using pulsed laser Raman spectroscopy.International Journal of Mineral processing, Vol. 84, 1-4, October, pp. 262-273.TechnologySorting, laser excitation
DS200912-0424
2009
Snyman, L.W.Lamprecht, G.H., Human, H.G.C., Snyman, L.W.Diamond detection in ore using laser Raman spectrosopy: comparison between pulsed and continuous wave lasers as excitation source at 532 nm.Transactions of the Institution of Mining and Metallurgy, Vol. 118, 1, March pp. 60-62.TechnologyDiamond processing
DS200412-1962
2004
Snyman, M.Taplin, R., Snyman, M.Doing business in South Africa's new mining environment: a legal perspective.Canadian Institute of Mining and Metallurgy Bulletin, Vol. 97, 1078, March pp. 91-98.Africa, South AfricaLegal - royalty
DS201503-0177
2015
So, B-D.So, B-D., Yuen, D.A.Generation of tectonic over-pressure inside subducting oceanic lithosphere involving phase-loop of olivine-wadsleyite transition.Earth and Planetary Science Letters, Vol. 413, March 1, pp. 59-69.MantleSubduction
DS201112-0916
2011
So, H.Satish-Kumar, M., So, H., Yoshino, T., Kato, M., Hiroi, Y.Experimental determination of carbon isotope fractionation between iron carbide melt and carbon: 12 C-enriched carbon in the Earth's core?Earth and Planetary Science Letters, Vol. 310, 3-4, pp. 340-348.MantleCarbon
DS200512-0659
2005
So, J.F.Lu, P.J., Yao, N., So, J.F., Harlow, G.E., Lu, J.F., Wang, G.F., Chaikin, P.M.The earliest use of corundum and diamond in prehistoric China.Archeometry, Vol. 47,1, Feb. pp. 1-12. Blackwell PublicationsChinaHistory
DS1992-1442
1992
Soares, A.Soares, A.Geostatistical estimation of multi-phase structuresMathematical Geology, Vol. 24, No. 2, February pp. 149-160GlobalGeostatistics, Structure
DS1995-1481
1995
Soares, P.C.Perdoncini, L.C., Soares, P.C., Bizzi, L.A.Diamonds associated with the Permo-Carboniferous glacial deposits in the Parana Basin, Brasil.Proceedings of the Sixth International Kimberlite Conference Abstracts, pp. 436-438.Brazil, Parana, Paraguay, Uruguay, ArgentinaGeomorphology, Alluvials
DS1998-1369
1998
Soares, P.C.Soares, P.C., Rostirolla, Reis NetoPre-Gondwana continental fragments: amalgamation and mineralization in southeastern South America.Journal of African Earth Sciences, Vol. 27, 1A, p. 187. AbstractSouth AmericaTectonics
DS200712-1007
2007
Soares, P.C.Soares, P.C., Riffel, S.B.Hypsemtric curves as a tool for paleosurface mapping.Mathematical Geology, Vol. 38, 6, pp. 679-695.TechnologyPaleosurfaces - geomorphology not specific to diamonds
DS201112-0777
2010
Soares, P.C.Perdoncini, L.C., Soares, P.C., Roberto de Gois, J.Excursao de acmpo: Geologia e ocxorencias diamantiferas da regiao de Tibagi.5th Brasilian Symposium on Diamond Geology, Nov. 6-12, Guidebook pp. 92-101.South America, Brazil, ParanaGuidebook area - Tibagi
DS201808-1789
2018
Soares de Oliveira, F.V.Simon, M., Bongiolo, E.M., Avila, C.A., Oliveira, E.P., Texeira, W., Stohler, R.C., Soares de Oliveira, F.V.Neoarchean reworking of TTG like crust in the southern most portion of the Sao Francisco craton: U-Pb zircon dating and geochemical evidence from the Sao Tiago batholith.Precambrian Research, Vol. 314, pp. 353-376.South America, Brazilcraton

Abstract: Field, petrographic and geochemical data combined with in situ zircon U-Pb LA-ICP-MS ages are documented for the São Tiago Batholith (southernmost portion of the São Francisco Craton) to understand its origin and magmatic evolution. The geologic relations indicate that the batholith is composed of granitic to granodioritic orthogneisses (L2) with tonalitic xenoliths (L1) intruded by pegmatite (L3) and metagranite (L4). L1 consists of two facies of tonalitic orthogneiss, one biotite-rich, and the other biotite-poor. The geochemical evidence, including high K2O with mantle-like chemical signature, suggests that the Bt-rich tonalitic gneiss (2816?±?30?Ma) was derived from contamination of mafic magmas by crustal-derived components. The Bt-poor tonalitic gneiss, of TTG affinity, was generated by partial melting of LILE-enriched mafic rocks, possibly from oceanic plateus in a subduction environment. L2 includes two distinct types of rocks: (i) granodioritic orthogneiss, chemically ranging from medium-pressure TTGs to potassic granitoids originated via partial melting of previous TTG crust, including L1 Bt-poor; and (ii) granitic gneiss (2664?±?4?Ma), geochemically similar to crustal-derived granites, produced by melting of the L1 Bt-rich tonalitic gneiss or mixed TTG/metasedimentary sources. L3 pegmatite (2657?±?23?Ma) results from melting of L2, whereas L4 metagranite (dikes and stocks) shows petrogenesis similar to that of the L2 granitic gneiss. Related orthogneisses occur near the São Tiago Batholith: (i) a hornblende-bearing tonalitic gneiss, and (ii) a hybrid hornblende-bearing granitic gneiss (2614?±?13?Ma), whose genesis is linked with interaction of sanukitoid and felsic potassic melts, representing the last Archean magmatic pulse of the region. The Minas strata along the Jeceaba-Bom Sucesso lineament near our study region encircle the São Tiago Archean crust, representing an irregular paleo-coastline or a micro-terrane amalgamation with the São Francisco Proto-craton, with possible subsequent dome-and-keel deformational processes. Our petrological and geochronological data reevaluate nebulous concepts in the literature about the SFC, revealing (i) a chemically and compositionally diverse crustal segment generated at the Late Archean in diverse geodynamic scenarios, and (ii) a more complex lineament than previously thought in terms of the paleogeography of the southern São Francisco Craton.
DS201712-2716
2017
Soares Franca, O.Pereira, R.S., Fuck, R.A., Soares Franca, O., Leite, A.A.Evidence of young, proximal and primary (YPP) diamond source occurring in alluviums in the Santa Antonio do Bonito, Santo Inacio and Douradhinho rivers in Coromandel region, Minas Gerais.Brazilian Journal of Geology, Vol. 47, 3, pp. 383-401.South America, Brazildeposit - Alta Paranaiba

Abstract: Magmatism associated with the Alto Paranaíba structural high comprises kimberlites, kamafugites, and alkaline complexes, forming an approximately 400 x 150 km NW-SE belt in the southern São Francisco Craton. Dating of some intrusions reveals ages between 120 and 75 Ma. Chemical analyses of garnet recovered in alluvium from traditional diamond digging areas indicate peridotitic garnet windows in Três Ranchos and Coromandel. Six hundred and eighty (680) diamonds acquired or recovered during mineral exploration in the digging areas of Romaria, Estrela do Sul, Três Ranchos and Coromandel show unique characteristics, certain populations indicating young, proximal and primary sources (YPP). Analyses of 201 stones from Santo Antônio do Bonito, Santo Inácio and Douradinho rivers alluvium, Coromandel, present no evidence of transport, characterizing a proximal source. Within these river basins, exposures of the Late Cretaceous Capacete Formation basal conglomerate contain mainly small rounded and/or angular quartzite pebbles and of basic and ultrabasic rocks, as well as kimberlite minerals (garnet, ilmenite, spinel, sometimes diamond). A magnetotelluric profile between the Paraná and Sanfranciscana basins shows that the thick underlying lithosphere in the Coromandel region coincides with the peridotitic garnet window and with a diamond population displaying proximal source characteristics. Diamond-bearing kimberlite intrusions occur in different areas of Alto Paranaíba.
DS201112-0981
2010
Soares Lima, E.Soares Lima, E., Landim Dominguez, J.M.Analise de minerais pesados como ferramenta na avaliacao de possiveis depositos diamantiferos na platforma continental no sul da Bahia.5th Brasilian Symposium on Diamond Geology, Nov. 6-12, abstract p. 62.South America, Brazil, BahiaPlacer diamonds
DS201012-0144
2010
Soares RochaDe Oliveira Cordeiro, P.F., Brod, J.A., Ventura Santos, R., Dantas, E.L., Gouvieia de Oliveira, C., Soares Rocha, Barbosa, E.Stable ( C,O) and radiogenic (Sr, Nd) isotopes of carbonates as indicators of magmatic and post magmatic processes of phoscorite series rocks and carbonatites fContributions to Mineralogy and Petrology, In press available, 14p.South America, BrazilCatalao I
DS201112-0256
2011
Soares Rocha BarbosaDe Oliveira Cordeiro, Brod, Palmieri, Gouveia de Oliveira, Soares Rocha Barbosa, Santos, Gaspar, AssisThe Catalao I niobium deposit, central Brazil: resources, geology and pyrochlore chemistry.Ore Geology Reviews, Vol. 41, pp. 112-121.South America, BrazilCarbonatite
DS201212-0681
2012
Soares Rocha Barbosa, E.Soares Rocha Barbosa, E., Brod, J.A., Junqueira-Brod, T.C., Dantas, E.L., De Oliveira Cordeiro, P.F., Siqueira Gomide, C.Bebdourite from its type area Sailtre 1 complex: a key petrogenetic series in the Late-Cretaceous Alto Paranaiba kamafugite carbonatite phoscorite association, central Brazil.Lithos, Vol. 146-147, pp. 56-72.South America, BrazilCarbonatite
DS201112-0257
2011
Soares Rochas Barbosa, E.De Oliveire Cordeiro, P.F., Brod, J.A., Ventura Santos, R., Dantas, E.L., Gouveia de Oliveira, C., Soares Rochas Barbosa, E.Stable (C,O) and radiogenic (Sr,Nd) isotopes of carbonates as indicators of magmatic and post-magmatic processes of phoscorite series rocks and carbonatites from Catalao 1, central Brazil.Contributions to Mineralogy and Petrology, Vol. 161, 3, pp. 451-464.South America, BrazilCarbonatite
DS1987-0644
1987
Sobachenko, V.N.Samoilov, V.S., Ronenson, B.M., Sobachenko, V.N.Geochemistry of alkaline palingenesis and the associatedcarbonatiteformation.(Russian)Doklady Academy of Sciences Akademy Nauk SSSR, (Russian), Vol. 196, No. 4, pp. 976-980RussiaBlank
DS1989-1331
1989
Sobachenko, V.N.Samoylov, V.S., Ronenson, B.M., Sobachenko, V.N.Geochemistry of alkalic palingenesis and the carbonatite formation associated with itDoklady Academy of Science USSR, Earth Science Section, Vol. 296, No. 1-6, pp. 207-210RussiaCarbonatite, Ilmen-Vishnevorogorsk belt
DS1994-1651
1994
Sobachenko, V.N.Sobachenko, V.N., Gundobin, A.G., Sandimirova, G.P., et al.Strontium isotopes in the rocks of formational type of near fault alkaline carbonate silicate metasomatites.Russian Geology and Geophysics, Vol. 35, No. 3, pp. 51-58.Russia, Urals, YeniseiGeochronology, Carbonatite
DS1975-0864
1978
Sobba raju, M.Setti, D.N., Srennivasa rao, T., Sobba raju, M.A Note on the Occurrence of Kimberlite -carbonatite Enclaves in the Peninsular Gneiss Warangal District, A.p.Indian Minerals, Vol. 32, No. 2, PP. 59-61.India, Andhra PradeshAlluvial Placer Deposits, Genesis
DS1900-0081
1901
Sobbe, F.A.Von.Sobbe, F.A.Von.Mining and Treatment of Diamond Bearing Ground in South Africa.Liverpool Eng. Soc. Transactions, Vol. 22, PP. 103-119.Africa, South AfricaMining Engineering, Diamond Recovery
DS1986-0761
1986
Sobczak, L.W.Sobczak, L.W., Mayr, U., Sweeney, J.F.Crustal section across the polar continent, ocean transition in CanadaCanadian Journal of Earth Sciences, Vol. 23, pp. 608-21.Northwest Territories, Boothia Peninsula, Ellesmere IslandGeodynamics
DS1989-1418
1989
Sobczak, L.W.Sobczak, L.W., Halpenny, J.F., Thomas, M.D.An enhanced residual isostatic anomaly map of Canada: a new perspective for crustal investigationsGeological Society of Canada (GSC) Forum 1989, P. 22 abstractGlobalMidcontinent, Seismics
DS201603-0425
2015
Sobel, E.R.Terra Acosta, V., Bande, A., Sobel, E.R., Parra, M., Schildgen, T.F., Stuart, F., Strecker, M.R. .Cenozoic extension in the Kenya Rift from low temperature thermochronology: links to diachronous spaciotemporal evolution of rifting in East Africa.Tectonics, Vol. 34, 12, pp. 2367-2388.Africa, KenyaRifting

Abstract: The cooling history of rift shoulders and the subsidence history of rift basins are cornerstones for reconstructing the morphotectonic evolution of extensional geodynamic provinces, assessing their role in paleoenvironmental changes and evaluating the resource potential of their basin fills. Our apatite fission track and zircon (U-Th)/He data from the Samburu Hills and the Elgeyo Escarpment in the northern and central sectors of the Kenya Rift indicate a broadly consistent thermal evolution of both regions. Results of thermal modeling support a three-phased thermal history since the early Paleocene. The first phase (~65 50?Ma) was characterized by rapid cooling of the rift shoulders and may be coeval with faulting and sedimentation in the Anza Rift basin, now located in the subsurface of the Turkana depression and areas to the east in northern Kenya. In the second phase, very slow cooling or slight reheating occurred between ~45 and 15?Ma as a result of either stable surface conditions, very slow exhumation, or subsidence. The third phase comprised renewed rapid cooling starting at ~15?Ma. This final cooling represents the most recent stage of rifting, which followed widespread flood-phonolite emplacement and has shaped the present-day landscape through rift shoulder uplift, faulting, basin filling, protracted volcanism, and erosion. When compared with thermochronologic and geologic data from other sectors of the East African Rift System, extension appears to be diachronous, spatially disparate, and partly overlapping, likely driven by interactions between mantle-driven processes and crustal heterogeneities, rather than the previously suggested north south migrating influence of a mantle plume.
DS201811-2595
2018
Sobh, M.Ngalamo, J.F.G., Sobh, M., Bisso, D., Abdelsalam, M.G., Atekwana, E., Ekodeck, G.E.Lithospheric structure beneath the Central Africa Orogenic Belt in Cameroon from the analysis of satellite gravity and passive seismic data.Tectonophysics, Vol. 745, pp. 326-337.Africa, Cameroongeophysics - seismic

Abstract: We present original results that contribute to the understanding of lithospheric structures modification of regions that have witnessed superimposition of multiple tectonic events throughout their geological history. We analyze satellite gravity data through two-dimensional radially-averaged power spectral analysis as well as passive seismic data through thermal modeling to image the depth to the Moho and the lithosphere - asthenosphere boundary (LAB beneath the Central Africa Orogenic Belt (CAOB). The CAOB is an ENE-trending deformation belt extending from Cameroon in the west to Sudan in the east. In Cameroon, it is found on the northern edge of the Congo craton represented by the Oubanguides orogenic belt (the Western Cameroon, the Adamawa - Yade, and the Yaoundé domains). It coincides with the Adamawa plateau and the Benue Trough, and it is spotted by the Cenozoic Cameroon Volcanic Line (CVL). The CAOB was formed during the Precambrian Greater Gondwana assembly but was reactivated during the Mesozoic as a result of Gondwana breakup. We find deeper Moho and LAB) beneath Congo craton and the Yaoundé domain reaching ~50?km and ~200?km, respectively. We map shallower Moho and LAB beneath the CAOB (together with the Adamawa plateau and the Benue trough) reaching ~25?km and ~70?km, respectively. We interpret the shallower LAB beneath the CAOB as due to zonal sub-continental lithospheric mantle (SCLM) delamination along the northern edge of the Congo craton that occurred in association with collisional assembly of Greater Gondwana. This allowed for channelization of mantle flow during the Cenozoic resulting in the formation of the CVL and the uplift of the Adamawa plateau. Our approach can be used to understand the modification of lithospheric structures beneath other terrains that have long tectonic history.
DS201812-2812
2018
Sobh, M.Goussi Ngalamo, J.F., Sobh, M., Bisso, D., Abdelsalam, M.G., Atekwana, E., Ekodeck, G.E.Lithospheric structure beneath the central Africa orogenic belt in Cameroon from the analysis of satellite gravity and passive seismic data.Tectonophysics, Vol. 745, pp. 326-337.Africa, Cameroongeophysics - seismics

Abstract: We present original results that contribute to the understanding of lithospheric structures modification of regions that have witnessed superimposition of multiple tectonic events throughout their geological history. We analyze satellite gravity data through two-dimensional radially-averaged power spectral analysis as well as passive seismic data through thermal modeling to image the depth to the Moho and the lithosphere - asthenosphere boundary (LAB beneath the Central Africa Orogenic Belt (CAOB). The CAOB is an ENE-trending deformation belt extending from Cameroon in the west to Sudan in the east. In Cameroon, it is found on the northern edge of the Congo craton represented by the Oubanguides orogenic belt (the Western Cameroon, the Adamawa - Yade, and the Yaoundé domains). It coincides with the Adamawa plateau and the Benue Trough, and it is spotted by the Cenozoic Cameroon Volcanic Line (CVL). The CAOB was formed during the Precambrian Greater Gondwana assembly but was reactivated during the Mesozoic as a result of Gondwana breakup. We find deeper Moho and LAB) beneath Congo craton and the Yaoundé domain reaching ~50?km and ~200?km, respectively. We map shallower Moho and LAB beneath the CAOB (together with the Adamawa plateau and the Benue trough) reaching ~25?km and ~70?km, respectively. We interpret the shallower LAB beneath the CAOB as due to zonal sub-continental lithospheric mantle (SCLM) delamination along the northern edge of the Congo craton that occurred in association with collisional assembly of Greater Gondwana. This allowed for channelization of mantle flow during the Cenozoic resulting in the formation of the CVL and the uplift of the Adamawa plateau. Our approach can be used to understand the modification of lithospheric structures beneath other terrains that have long tectonic history.
DS200412-1707
2004
Sobie, P.Russell, H.A.J., McClenaghan, M.B., Boucher, D., Sobie, P.Kimberlite indicator minerals distribution in eskers, Lake Timiskaming kimberlite field, Ontario and Quebec: preliminary resultsGeological Association of Canada Abstract Volume, May 12-14, SS14-03 p. 262.abstractCanada, Ontario, Lake TemiskamingGeochemistry, geomorphology
DS201212-0682
2012
Sobie, P.Sobie, P.Overview of Firestone diamonds's activities in Botswana and Lesotho.PDAC 2012, abstractAfrica, Botswana, LesothoDeposits
DS201808-1782
2018
Sobie, P.Rapopo, M., Sobie, P.The Liqhobong kimberlite cluster: an update on the geology.Mineralogy and Petrology, doi.org/10.1007/s00710-018-0624-5 12p.Africa, Lesothodeposit - Liqhobong

Abstract: The Cretaceous Liqhobong kimberlite cluster comprises at least six known diamondiferous Group 1 kimberlite bodies; namely the circular Main Pipe (8.5 ha), ovoid Satellite Pipe (1.6 ha), Discovery Blow (0.15 ha), Blow (0.1 ha), the Main Dike adjoining the blows and pipes, and one other recently exposed dike. The kimberlites intrude Jurassic Drakensberg lavas and outcrop at ~2650 masl in rugged Maluti Mountain terrain, and are emplaced along a strike of about 2.5km. The cluster represents at least three episodes of structurally controlled kimberlite intrusion; the first which comprised the dike(s?) and the two blows (the blows being dike enlargements emplaced 1km apart) and later the two separate emplacements of the Main and Satellite Pipes.
DS1998-0257
1998
Sobie, P.A.Clarke, J., Sobie, P.A., Wilkes, T.A., Zweistra, P.The geology and economic evaluations of the Liqhobong kimberlites, Lesotho.7th International Kimberlite Conference Abstract, pp. 158-160.LesothoPetrology, Deposit - Liqhobong
DS2003-0906
2003
Sobie, P.A.McClenaghan, M.B., Kjarsgaard, I.M., Kjarsgaard, B.A., Sobie, P.A.Application of surficial exploration methods in the Lake Timiskaming kimberlite field8 Ikc Www.venuewest.com/8ikc/program.htm, Session 8, POSTER abstractOntarioGeochemistry, geomorphology
DS200412-1263
2003
Sobie, P.A.McClenaghan, M.B., Kjarsgaard, I.M., Kjarsgaard, B.A., Sobie, P.A.Application of surficial exploration methods in the Lake Timiskaming kimberlite field, Canada.8 IKC Program, Session 8, POSTER abstractCanada, OntarioDiamond exploration Geochemistry, geomorphology
DS200512-1017
2005
Sobie, P.A.Sobie, P.A., Long, G.The mini bulk sampling of kimberlite 92-2 by Contact Diamond Company.CIM Mining Rocks April 24-27th. Toronto Annual Meeting, Paper# 1874 AbstractCanada, Ontario, Kirkland LakeNews item - Contact Diamond
DS201911-2565
2019
Soboelev, N.V.Soboelev, N.V., Logvinova, A.M., Tomilenko, A.A., Wirth, R., Bulbak, T.A., Lukyanova, L.I., Fedorova, E.N., Reutsky, V.N., Efimova, E.S.Mineral and fluid inclusions in diamonds from the Urals placers, Russia: evidence for solid molecular N2 and hydrocarbons in fluid inclusions.Geochimica et Cosmochimica Acta, Vol. 266, pp. 197-212.Russia, Uralsdiamond inclusions

Abstract: The compositions of mineral inclusions from a representative collection (more than 140 samples) of diamonds from the placer deposits in the Ural Mountains were studied to examine their compositional diversity. The overwhelming majority of rounded octahedral and dodecahedral stones typical of placers contain eclogitic (E-type) mineral inclusions (up to 80%) represented by garnets with Mg# 40-75 and Ca# 10-56, including the unique high calcic “grospydite” composition, omphacitic pyroxenes containing up to 65% of jadeite, as well as kyanite, coesite, sulfides, and rutile. Peridotitic (P-type) inclusions are represented by olivine, subcalcic Cr-pyrope, chrome diopside, enstatite and magnesiochromite that are typical for diamonds worldwide. Comparing the chemical composition of olivine, pyrope and magnesiochromite in diamonds of the Urals, north-east of the Siberian platform placers and Arkhangelsk province kimberlites show striking similarity. There are significant differences only in the variations of carbon isotopic composition of the diamonds from the placers of the Urals and north-east of the Siberian platform. One typical rounded dodecahedral diamond was found to contain abundant primary oriented submicrometer-sized (<3.0?µm) octahedral fluid inclusions identified by transmission electron microscopy, which caused the milky color of the entire diamond crystal. The electron energy-loss spectrum of a singular inclusion has a peak at ~405?eV, indicating that nitrogen is present. The Raman spectra with peaks at 2346-2350?cm-1 confirmed that nitrogen exists in the solid state at room temperature. This means that fossilized pressure inside fluid inclusions may be over 6.0 GPa at room temperature, so the diamond may be considered sublithospheric in origin. However, identification of unique fluid inclusions in one typical placer diamond allows one to expand the pressure limit to at least more than 8.0 GPa. The volatile components of four diamonds from the Urals placers were analyzed by gas chromatography-mass spectrometry (GC-MS). They are represented (rel. %) by hydrocarbons and their derivatives (14.8-78.4), nitrogen and nitrogenated compounds (6.2-81.7), water (2.5-5.5), carbon dioxide (2.8-12.1), and sulfonated compounds (0.01-0.96). It is shown that high-molecular-weight hydrocarbons and their derivatives, including chlorinated, nitrogenated and sulfonated compounds, appear to be stable under upper mantle P-T conditions. A conclusion is drawn that Urals placer diamonds are of kimberlitic origin and are comparable in their high E-type/P-type inclusion ratios to those from the northeastern Siberian platform and in part to diamonds of the Arkhangelsk kimberlite province.
DS1993-1493
1993
SobolevSnyder, G.A., Jerde, E.A., Taylor, L.A., Halliday, A.N., Sobolevneodymium and Strontium isotopes from Diamondiferous eclogites, UdachnayaEarth and Planetary Science Letters, Vol. 118, No. 1-4, July, pp. 91-100.Russia, Siberia, YakutiaGeochronology, Deposit -Udachnaya
DS1995-0541
1995
SobolevFinnie, K., Fisher, D., Griffin, W.L., Harris, J., SobolevNitrogen aggregation in metamorphic diamonds from KazakhstanGeochimica et Cosmochimica Acta, Vol. 58, No.23, pp. 5173-5177.Russia, KazakhstanMetamorphic rocks, microdiamonds, Kokchetav massif
DS1995-0683
1995
SobolevGriffin, W.L., Kaminsky, F., O'Reilly, S.Y., Ryan, SobolevMapping the Siberian lithosphere with garnets and spinelsProceedings of the Sixth International Kimberlite Conference Extended Abstracts, p. 194-5.Russia, SiberiaGeothermometry, Deposit -Daldyn, Alakit, Malo Botuobiya
DS1996-0269
1996
SobolevChepurov, A.I., Tomilenko, A.A., Shebanin, A.P., SobolevFluid inclusions in diamonds from Yakutian placersDoklady Academy of Sciences, Vol. 339, No. 8, Jan., pp. 128-132.Russia, YakutiaDiamond inclusions, Alluvials
DS1997-1162
1997
SobolevTomilenko, A.A., Chepurov, Turkin, Shebanin, SobolevFluid inclusions in synthetic diamond crystalsDoklady Academy of Sciences, Vol. 353, No. 2, Feb-Mar, pp. 247-50.GlobalDiamond - synthetics, crystallography
DS1998-0220
1998
SobolevCartigny, P., De Corte, Shatsky, Sobolev, JavoyMicrodiamonds from ultra high pressure (UHP) metamorphic rocks of the Kokchetav massif and bearing on carbon and nitrogen ...Mineralogical Magazine, Goldschmidt abstract, Vol. 62A, p. 276-7.RussiaSubduction, Deposit - Kokchetav
DS1998-0318
1998
SobolevDe Corte, K., Cartigny, P., Shatsky, De Paepe, SobolevMicrodiamonds from ultra high pressure (UHP) metamorphic rocks of Kokchetav Massif, northernKazakstan: FTIR spectroscopy....7th International Kimberlite Conference Abstract, pp. 184-186.Russia, KazakhstanMetamorphic rocks, diamond morphology, Deposit - Kokchetav
DS1998-0319
1998
SobolevDe Corte, K., Cartigny, P., Shatsky, Sobolev, JavoyEvidence of fluid inclusions in metamorphic microdiamonds from the Kokchetav Massif.Geochimica et Cosmochimica Acta, Vol. 62, No. 23/24, Dec. pp. 3765-73.Russia, KazakhstanMicrodiamonds, nitrogen, Deposit - Kokchetav Massif
DS1998-0728
1998
SobolevKeller, R., Taylor, L., Snyder, Sobolev, Carlson3- D petrography of a Diamondiferous eclogite from Udachnaya Siberia7th International Kimberlite Conference Abstract, pp. 405-7.Russia, SiberiaTomography, petrography, eclogite, Deposit - Udachnaya
DS1998-0729
1998
SobolevKeller, R.A., Remley, D., Snyder, Taylor, SobolevMantle xenoliths from the Obnazhennaya kimberlite, Yakutia7th International Kimberlite Conference Abstract, pp. 402-4.Russia, YakutiaXenoliths, Deposit - Obnazhennaya
DS1998-1228
1998
SobolevReimers, L.F., Pokhilenko, Yefimova, SobolevUltramafic mantle assemblages from Sytykanskaya kimberlite pipe, Yakutia7th. Kimberlite Conference abstract, pp. 730-32.Russia, YakutiaXenoliths, mineral chemistry, Deposit - Sytykanskaya
DS1998-1624
1998
SobolevZedgenizov, D.A., Logvinova, Shatskii, SobolevInclusions in microdiamonds from some kimberlite diatremes of YakutiaDoklady Academy of Sciences, Vol. 359, No. 2, pp. 204-8.Russia, YakutiaDiamond inclusions, Microdiamonds
DS1999-0691
1999
SobolevSnyder, G.A., Taylor, Beard, Halliday, Sobolev, SimakovThe diamond bearing Mir eclogites: neodymium Strontium isotopic evidence for a possible early to Mid Proterozoic source7th International Kimberlite Conference Nixon, Vol. 2, pp. 808-15.Russia, Siberia, YakutiaDepleted mantle source with arc affinity, Mineral chemistry, geothermometry
DS2000-0101
2000
SobolevBorzdov, Y.M., Sokol, Palyanov, Khokhryakov, SobolevGrowth of synthetic diamond monocrystals weighing up to six carats and perspectives of their application.Doklady Academy of Sciences, Vol. 374, No. 7, Sept-Oct. pp. 1113-5.RussiaDiamond - morphology, Diamond - synthesis, Crystallography
DS2001-0934
2001
SobolevPokhilenko, N.P., McDonald, Hall, SobolevAbnormally thick Cambrian lithosphere of the southeast Slave Craton evidence from crystalline inclusions ..Slave-Kaapvaal Workshop, Sept. Ottawa, 3p. abstractNorthwest TerritoriesDiamonds and pyrope compositions - kimberlites, Deposit - Snap Lake
DS2001-0935
2001
SobolevPokhilenko, N.P., Sobolev, McDonald, Hall, YefimovaCrystalline inclusions in diamonds from kimberlites of the Snap lake area: new evidence anomalous lithosphereDoklady Academy of Sciences, Vol. 381, No. 7, Sept/Oct. pp. 806-11.Northwest TerritoriesDiamond - inclusions, Deposit - Snap Lake
DS200512-0007
2004
SobolevAgashev, A.M., Pokhilenko, N.P., Tolstov, A.V., Polyanichko, Malkovets, SobolevNew age dat a on kimberlites from the Yakutian Diamondiferous Province.Doklady Earth Sciences, Vol. 399, 8, pp.1142-1145.Russia, YakutiaGeochronology
DS200612-0047
2006
SobolevAshchepkov, I.V., Vladykin, Sobolev, Pokhilenko, Rotman, Logvinova, Afanasiev, Pokhilenko, KarpenkoReconstruction of the mantle sequences and the structure of the feeding and vein magmatic systems beneath the kimberlite fields of Siberian platform.Vladykin: VI International Workshop, held Mirny, Deep seated magmatism, its sources and plumes, pp. 79-103.Russia, SiberiaDyke systems
DS200612-0048
2006
SobolevAshchepkov, I.V., Vladykin, Sobolev, Pokhilenko, Rotman, Logvinova, Afanasiev, Pokhilenko, KarpenkoVariations of the oxygen conditions in mantle column beneath Siberian kimberlite pipes and it's application to lithospheric structure of feeding systems.Vladykin: VI International Workshop, held Mirny, Deep seated magmatism, its sources and plumes, pp. 125-144.Russia, SiberiaRedox
DS200912-0447
2009
SobolevLiu, Y., Taylor, L.A., Sarbadhikari, Valley, Ushikubo, Spicuzza, Kita, Ketchum, Carlson, Shatsky, SobolevMetasomatic origin of diamonds in the world's largest Diamondiferous eclogite.Lithos, In press - available 41p.RussiaDeposit - Udachnaya
DS201012-0394
2009
SobolevKlein-BenDavid, O., Logvinova, A.M., Schrauder, M., Spetius, Z.V., Weiss, Hauri, Kaminsky, Sobolev, Navon, O.High Mg carbonatitic Micro inclusions in some Yakutian diamonds - a new type of diamond forming fluid.Lithos, Vol. 112 S pp. 648-659.RussiaMineral chemistry - end member
DS201112-0640
2011
SobolevMalkovets, V.G., Zedgenizov, Sobolev, Kuzmin, Gibsher, Shchukina, Golovin, Verichev, PokhilenkoContents of trace elements in olivines from diamonds and peridotite xenoliths of the V.Grib kimberlite pipe ( Arkhangel'sk Diamondiferous province, Russia).Doklady Earth Sciences, Vol. 436, 2, pp. 301-307.RussiaDeposit - Grib
DS1992-1443
1992
Sobolev, A.Sobolev, A., Casey, J.E., Shimizu, N., Perfit, M.Contamination and mixing of Mid Ocean Ridge Basalt (MORB) primary melts: evidence from melt inclusions in Siqueiros picritesEos Transactions, Vol. 73, No. 14, April 7, supplement abstracts p.336GlobalExperimental petrology, Picrites
DS201012-0012
2010
Sobolev, A.Arndt, N.T., Guitreau, M., Boullier, A-M., Le Roex, A., Tommasi, A.M., Cordier, P., Sobolev, A.Olivine, and the origin of kimberlite.Journal of Petrology, Vol. 51, 3, pp. 573-602.TechnologyKimberlite genesis
DS1994-1652
1994
Sobolev, A.F.Sobolev, A.F., Danyushevsky, L.V.Petrology and geochemistry of boninites from the north terminations of the Tonga Trench - high Ca magmas.Journal of Petrology, Vol. 35, pt. 5, pp. 1183-1211.GlobalBoninites
DS1984-0238
1984
Sobolev, A.V.Dmitriev, L.V., Sobolev, A.V., Uchanov, A.V., Malaysheva, T.V.Primary Differences in Oxygen Fugacity and Depth of Melting in the Mantle Source Regions for Oceanic Basalts.Earth Plan. Sci. Letters, Vol. 70, PP. 303-310.GlobalMineral Chemistry, Mid Ocean Ridge Basalt (morb)
DS1984-0686
1984
Sobolev, A.V.Sobolev, A.V., Slutskii, A.B.Composition and Crystallization Conditions of the Initial Melt of the Siberian Meimechites in Relation to the General Problem of Ultrabasic Magmas.Soviet Geology And Geophysics, Vol. 25, No. 12, PP. 93-104.RussiaMeimechite, Related Rocks
DS1984-0687
1984
Sobolev, A.V.Sobolev, A.V., Slutskiy, A.B.Composition and crystallization conditions of the initial melt of the Siberian meimechites in relation to the general Problem of ultrabasic magmasSoviet Geology and Geophysics, Vol. 25, No. 12, pp. 93-104RussiaMeimechites
DS1985-0634
1985
Sobolev, A.V.Sobolev, A.V., Sobolev, N.V., Smit, K.B.New Dat a on the Petrology of Olivine Lamproites of Western Australia Based on Results of the Investigation of Magmatic Inclusions in Olivines.Doklady Academy of Sciences AKAD. NAUK SSSR., Vol. 284, No. 1, PP. 196-Australia, Western AustraliaLamproite, Petrology
DS1985-0635
1985
Sobolev, A.V.Sobolev, A.V., Sobolev, N.V., Smit, K.B., Kononkova, N.N.New dat a on the petrology of olivine lamproites of Western australia From the results of the investigation of magmatic inclusions in olivines.(Russian)Doklady Academy of Sciences Akademy Nauk SSSR, (Russian), Vol. 284, No. 1, pp. 196-201AustraliaLamproite, Inclusions
DS1986-0690
1986
Sobolev, A.V.Ryabchikov, I.D., Solovova, I.P., Sobolev, N.V., Sobolev, A.V.Nitrogen in lamproitic magmas.(Russian)Doklady Academy of Sciences Akademy Nauk SSSR, (Russian), Vol. 288, No. 4, pp. 976-979RussiaLamproite
DS1986-0762
1986
Sobolev, A.V.Sobolev, A.V., Sobolev, N.V., Smith, C.B., Dubessy, J.Pecularities in the fluid and melt compositions of the lamproites And kimberlites based on the study of inclusions inolivinesProceedings of the Fourth International Kimberlite Conference, Held Perth, Australia, No. 16, pp. 93-94Australia, Russia, ArkansasLamproite
DS1987-0694
1987
Sobolev, A.V.Sobolev, A.V., Sobolev, N.V., Smith, C.B., Kononkova, N.N.New dat a on the petrology of the olivine lamproites of Western Australia revealed by the study of magmatic inclusions inolivineDoklady Academy of Science USSR, Earth Science Section, Vol. 284, No. 5, Publishing July 1987, pp. 106-110AustraliaLamproite, Petrology
DS1989-1419
1989
Sobolev, A.V.Sobolev, A.V., Sobolev, N.V., Smith, C.B., Dubessy, J.Fluid and melt compositions in lamproites And kimberlites based on the study of inclusions inolivineGeological Society of Australia Inc. Blackwell Scientific Publishing, Special, No. 14, Vol. 1, pp. 220-240Australia, RussiaEllendale, Mt. Cedric, Udachnaya, Geochemistry
DS1989-1426
1989
Sobolev, A.V.Sobolev, N.V., Sobolev, A.V., Pokhilenko, N.P., Yefimova, E.S.Chrome spinels coexisting with Yakutian diamondsDiamond Workshop, International Geological Congress, July 15-16th. editors, pp. 105-108. AbstractRussiaMineral chemistry, Chrome spinels
DS1990-0620
1990
Sobolev, A.V.Gurenko, A.A., Sobolev, A.V., Kononkova, N.N.New petrologic dat a on ugandites from the East African Rift, as revealed by study of magmatic inclusions in mineralsDoklady Academy of Science USSR, Earth Science Section, Vol. 305, No. 2, Sept. pp. 130-134UgandaPetrology, Ugandites
DS1990-0621
1990
Sobolev, A.V.Gurenko, A.A., Sobolev, A.V., Kononkova, N.N., Shcherbovskiy, Ye.Ya.Olivine from the ultrabasic and basic rocks of the East African rift system differentiated seriesGeochemistry International, Vol. 27, No. 10, pp. 117-123East AfricaPetrology, Ultrabasics -olivine -analyses
DS1990-0622
1990
Sobolev, A.V.Gurenko, A.A., Sobolev, A.V., Kononkova, N.N., Shcherbovsky, E.Y.Olivine of ultramafic and mafic rocks of the main differentiated seriesof the East African rift system (Russian)No. 3, March pp. 429-436, East AfricaGlobalPetrology
DS1991-0272
1991
Sobolev, A.V.Claoue-Long, J.C., Sobolev, N.V., Shatsky, V.S., Sobolev, A.V.Zircon response to diamond -pressure metamorphism in the Kokchetav USSRGeology, Vol. 19, No. 7, July pp. 710-713RussiaMicroprobe-SHRIMP, Geochronology -age populations
DS1992-0333
1992
Sobolev, A.V.Danyushevskiy, L.V., Sobolev, A.V., Kononkova, N.N.Methods of studying melt inclusions in minerals during investigations on water bearing primitive mantle melts (Tonga Trench boninites)Geochemistry International, Vol. 29, No. 7, pp. 48-61GlobalBoninites
DS1992-1444
1992
Sobolev, A.V.Sobolev, A.V., Kamenskiy, V.S., Kononkova, N.N.New dat a on Siberian meymechite petrologyGeochemistry International, Vol. 29, No. 3, pp. 10-20Russia, SiberiaPetrology, Meymechite
DS1993-0770
1993
Sobolev, A.V.Kamenetskiy, V.S., Portnyagin, M.V., Sobolev, A.V., DanyushevskiyMagma composition and crystallization conditions of the picrite-basalt suite in the Tumrok Ridge, East KamchatkaGeochemistry International, Vol.30, No. 3, March pp. 58-73RussiaPicrites
DS1993-1496
1993
Sobolev, A.V.Sobolev, A.V.Ion probe study of H2O in primary mantle melts: implications for the H2Ocontents and recycling in the mantle.American Geophysical Union, EOS, supplement Abstract Volume, October, Vol. 74, No. 43, October 26, abstract p. 682.MantleExperimental petrology, Mantle melts
DS1993-1497
1993
Sobolev, A.V.Sobolev, A.V., Shimizu, N.Ultra depleted primary melt included in an olivine from the Mid-AtlanticRidge.Nature, Vol. 363, No. 6425, May 13, pp. 151-154.Mid-Atlantic RidgeBlank
DS1994-0678
1994
Sobolev, A.V.Gurenko, A.A., Sobolev, A.V., Kononkova, N.N.The East African rift as indicated by magma inclusions in the mineralsDoklady Academy of Sciences Acad. Science USSR, Vol. 323, No. 2, June pp. 94-100.KenyaTectonics, Petrology
DS1995-1792
1995
Sobolev, A.V.Sobolev, A.V.Melt inclusions as a source of principal petrologic informationEos, Abstracts, Vol. 76, No. 17, Apr 25, p. S 266.MantleMelt, Mantle plumes
DS1996-1338
1996
Sobolev, A.V.Sobolev, A.V.Melt inclusions in minerals as a source of principle petrologicalinformationPetrology, Vol. 4, No. 3, pp. 209-220RussiaMelts, magmas, Petrology
DS1996-1339
1996
Sobolev, A.V.Sobolev, A.V., Chaussidon, M.H2O concentrations in primary melts from supra subduction zones and mid-ocean ridges: implications ...Earth and Planetary Science Letters, Vol. 137, No. 1/4, Jan. 1, pp. 45-56.MantleRecycling, Subduction
DS1996-1340
1996
Sobolev, A.V.Sobolev, A.V., Chaussidon, M.H2O concentrations in primary melts from supra subduction zones in mid-ocean ridges: storage/recyclingEarth and Planetary Science Letters, Vol. 137, No. 1-4, Jan. 1, pp. 45-56MantleWater storage, Subduction, Primary melts
DS2002-0349
2002
Sobolev, A.V.Danyushevsky, L.V., McNeill, A.W., Sobolev, A.V.Experimental and petrological studies of melt inclusions in phenocrysts from mantle derived magmas:Chemical Geology, Vol.183, 1-4, pp.5-24.MantleOverview - techniques, advantages and complications, Magmas
DS2002-0805
2002
Sobolev, A.V.Kamenetsky, V.S., Sobolev, A.V., Eggins, S.M., CrawfordOlivine enriched melt inclusions in chromites from low Ca boninites, Cape Vogel: ultramafic primary magmaChemical Geology, Vol.183, 1-4, pp.287-303.Papua New GuineaMagma - refractory mantle source and enriched component, sub calcic, Geochemistry
DS200512-0461
2005
Sobolev, A.V.Ionov, D., Prikhodko, V.S., Bodinier, J.L., Sobolev, A.V., Weis, D.Lithospheric mantle beneath the south eastern Siberian Craton: petrology of peridotite xenoliths in basalts from the Tokinsky Stanovik.Contributions to Mineralogy and Petrology, Vol. 149, no. 6, pp. 647-665.Russia, SiberiaXenoliths
DS200512-0495
2004
Sobolev, A.V.Kamenetsky, M.B., Sobolev, A.V., Kamenetsky, V.S., Maas, R., Danyushevsky, L.V., Thomas, R., Pokhilenko, N.P., Sobolev, N.V.Kimberlite melts rich in alkali chlorides and carbonates: a potent metasomatic agent in the mantle.Geology, Vol. 32, 10, Oct. pp. 845-848.Russia, Siberia, YakutiaUdachnaya, Group I, volatiles, metasomatism, inclusions
DS200512-0666
2005
Sobolev, A.V.Maas, R., Kamenetsky, M.B., Sobolev, A.V., Kamenetsky, V.S., Sobolev, N.V.Sr Nd Pb isotope evidence for a mantle origin of alkali chlorides and carbonates in the Udachnaya kimberlite, Siberia.Geology, Vol. 33, 7, July, pp. 549-552.Russia, SiberiaGeochronology - Udachnaya
DS200612-0006
2005
Sobolev, A.V.Akinin, V.V., Sobolev, A.V., Ntaflos, T., Richter, W.Clinopyroxene megacrysts from Enmelen melanephelinitic volcanoes (Chukchi Peninsula, Russia): application to composition and evolution of mantle melts.Contributions to Mineralogy and Petrology, Vol. 150, 1, pp. 85-101.RussiaNephelinite
DS200612-0514
2006
Sobolev, A.V.Gurenko, A.A., Sobolev, A.V.Petrology and geochemistry of East African kamafugites: constraints from inclusions in minerals.Geochimica et Cosmochimica Acta, Vol. 70, 18, p. 220. abstract only.Africa, UgandaGeochemistry
DS200612-0655
2006
Sobolev, A.V.Kamenetsky, M.B., Kamenetsky, V.S., Crawford, Chung, S-L., Kuzmin, A.J.D.V., Sobolev, A.V.Heterogeneous primary melts of the Emeishan picrites: contribution from eclogite to plume magmas.Geochimica et Cosmochimica Acta, Vol. 70, 18, p. 2. abstract only.ChinaEclogite
DS200612-0660
2006
Sobolev, A.V.Kamenetsky, V.S., Kamenetsky, M.B., Sharygin, V.V., Maas, R., Faure, K., Sobolev, A.V.Why are Udachnaya East pipe kimberlites enriched in Cl and alkalis but poor in H2O?Geochimica et Cosmochimica Acta, Vol. 70, 18, p. 3. abstract only.Russia, YakutiaDeposit - Udachnaya mineral chemistry
DS200612-1330
2006
Sobolev, A.V.Sobolev, N.V., Logvinova, A.M., Zedgenizov, D.A., Kuzmin, D.V., Sobolev, A.V.Olivine inclusions in Siberian diamonds: high precision approach to trace elements.International Mineralogical Association 19th. General Meeting, held Kobe, Japan July 23-28 2006, Abstract p. 137.Russia, SiberiaGeochemistry - mineral inclusiosn
DS200612-1391
2006
Sobolev, A.V.Sumino, H., Kaneoka, I., Matsufuji, K., Sobolev, A.V.Deep mantle origin of kimberlite magmas revealed by neon isotopes.Geophysical Research Letters, Vol. 33, L1618Russia, SiberiaGeochemistry - noble gases Udachnaya, MORB
DS200612-1392
2006
Sobolev, A.V.Sumino, H., Kaneoka, I., Matsufuji, K., Sobolev, A.V.Deep mantle origin of kimberlite magmas revealed by neon isotopes.Geochimica et Cosmochimica Acta, Vol. 70, 18, p. 624. abstract only.Russia, YakutiaGeochronology
DS200712-1008
2007
Sobolev, A.V.Sobolev, A.V.The amount of recycled crust in sources of mantle derived melts.Science, Vol. 316, no. 5823, April 20, pp. 412-416.MantleMelting
DS200712-1009
2007
Sobolev, A.V.Sobolev, A.V.Melt inclusions and host olivines: what do they tell about mantle processes and sources?Plates, Plumes, and Paradigms, 1p. abstract p. A951.MantleMelting
DS200812-0537
2008
Sobolev, A.V.Kamenetsky, M.B., Kamenenetsky, V.S., Sobolev, A.V., Golovin, Sharygin, Demouchy, Faure, KuzminOlivine in the Udachnaya East kimberlite ( Yakutia, Russia): morphology, compositional zoning and origin.9IKC.com, 3p. extended abstractRussiaDeposit - Udachnaya petrograaphy
DS200812-0538
2008
Sobolev, A.V.Kamenetsky, M.B., Kamenetsky, V.S, Sobolev, A.V., Golovin, A.V.Can pyroxenes be liquidus minerals in the kimberlite magma?9IKC.com, 3p. extended abstractRussiaDeposit - Udachnaya
DS200812-0541
2008
Sobolev, A.V.Kamenetsky, V.S., Kamentsky, M.B., Sobolev, A.V., Golovin, A.V., Demouchy, S., Faure, Sharygin, KuzminOlivine in the Udachnaya east kimberlite ( Yakutia, Russia): types, compositions and origins.Journal of Petrology, Vol. 49, 4, pp. 823-839.Russia, YakutiaDeposit - Udachnaya
DS200812-1090
2008
Sobolev, A.V.Sobolev, A.V.Recycled crust as a cause of large magmatic events in the convecting mantle.Goldschmidt Conference 2008, Abstract p.A880.MantleSubduction
DS200812-1091
2008
Sobolev, A.V.Sobolev, A.V., Hofmann, A.W., Brugmann, G., Batanova, V.G., Kuzmin, D.V.A quantitative link between recycling and osmium isotopes.Science, Vol. 321, 5888, July 25, p. 536.MantleSubduction
DS200812-1092
2008
Sobolev, A.V.Sobolev, N.V., Logvinova, A.M., Zedgenizov, D.A., Pokhilenko, N.P., Kuzmin, D.V., Sobolev, A.V.Olivine inclusions in Siberian diamonds: high precision approach to minor elements.European Journal of Mineralogy, Vol. 20, no. 3, pp. 305-315.Russia, SiberiaDiamond inclusions
DS200912-0273
2009
Sobolev, A.V.Gurenko, A.A., Sobolev, A.V., Hoernle, K.A., Hauff, F., Schincka, H-U.Enriched, HIMU type peridotite and depleted recycled pyroxenite in the Canary plume: a mixed up mantle.Earth and Planetary Science Letters, Vol. 277, 3-4, Jan. 30, pp. 514-524.Europe, Canary IslandsGeothermometry - subduction
DS200912-0669
2008
Sobolev, A.V.Savelieva, G.N., Sobolev, A.V., Batanova, V.G., Suslov, P.V., Brugmann, G.Structure of melt flow channels in the mantle.Geotectonics, Vol. 42, 6, pp. 430-447.MantleMelting
DS200912-0706
2009
Sobolev, A.V.Sobolev, A.V., Krivolutskaya, N.A., Kuzmin, D.V.Petrology of the parental melts and mantle sources of Siberian trap magmatism.Petrology, Vol. 17, 3, May pp. 253-286.RussiaMagmatism - Not specific to diamonds
DS200912-0708
2009
Sobolev, A.V.Sobolev, N.V., Logvinova, A.M., Zedgenizov, D.A., Pokhilenko, N.P., Malygina, E.V., Kuzmin, D.V., Sobolev, A.V.Petrogenetic significance of minor elements in olivines from diamonds and peridotite xenoliths from kimberlites of Yakutia.Lithos, In press - available 38p.Russia, YakutiaDiamond inclusions
DS200912-0838
2009
Sobolev, A.V.Yaxley, G.M., Spandler, C.S., Sobolev, A.V., Rosenthal, A., Green, D.H.Melting and melt peridotite interactions in heterogeneous upper mantle sources of primitive volcanics.Goldschmidt Conference 2009, p. A1482 Abstract.MantleMelting
DS201012-0335
2009
Sobolev, A.V.Kamenetsky, V.S., Kamenetsky, M.B., Sobolev, A.V., Golovin, A.V., Sharyginb, V.V., Pokhilenko, N.P., Sobolev, N.V.Can pyroxenes be liquidus minerals in the kimberlite magma?Lithos, Vol. 112 S pp. 213-235.MantleChemistry
DS201012-0733
2009
Sobolev, A.V.Sobolev, A.V., Sobolev, S.V., Kuzmin, D.V., Malitch, K.N., Petrunin, A.G.Siberian meimechites: origin and relation to flood basalts and kimberlites.Russian Geology and Geophysics, Vol. 50, 12, pp. 999-1033.Russia, SiberiaMeimechite
DS201212-0683
2012
Sobolev, A.V.Sobolev, N.V., Sobolev, A.V., Tomilenko, A.A., Kovyazin, S.V., Kuzmin, D.V.Pyrope lherzolite assemblage of Ti bearing olivine macrocryst from Udachanya ultrafresh kimberlite, Yakutia, Russia.emc2012 @ uni-frankfurt.de, 1p. AbstractRussiaDeposit - Udachnaya
DS201412-0863
2014
Sobolev, A.V.Sobolev, N.V., Sobolev, A.V., Tomilenko, A.A., Kovyazin, S.V., Batanova, V.G., Kuzmin, D.V.Paragenesis and origin of olivine macrocrysts from Udachnaya-East hypabyssal kimberlite, Yakutia, Russia.V.S. Sobolev Institute of Geology and Mineralogy Siberian Branch Russian Academy of Sciences International Symposium Advances in high pressure research: breaking scales and horizons ( Courtesy of N. Poikilenko), Held Sept. 22-26, 2p. AbstractRussia, YakutiaDeposit - Udachnaya-East
DS201502-0041
2014
Sobolev, A.V.Batanova, V.G., Lyaskovskaya, Z.E., Savelieva, G.N., Sobolev, A.V.Peridotites from the Kamchatsky Mys: evidence of oceanic mantle melting near a hotspot.Russian Geology and Geophysics, Vol. 55, pp. 1395-1403.RussiaHarzburgite, plumes

Abstract: A suite of mantle peridotites sampled in the Kamchatsky Mys includes spinel lherzolite, clinopyroxene-bearing harzburgite, and harzburgite. Mineral chemistry of olivine, chromian spinel, and clinopyroxene show strongly correlated element patterns typical of peridotite formed by 8% to more than 22% partial melting. Clinopyroxene in the Kamchatka peridotites is compositionally different from that of both abyssal and suprasubduction varieties: Clinopyroxene in lherzolite is depleted in LREE relative to abyssal peridotite and that in harzburgite has very low LREE and Sr unlike the subduction-related counterpart. These composition features indicate that the rocks ultra-depleted in basaltic components originated in the vicinity of a hotspot, possibly, proto-Hawaiian plume, which provided high temperature and melting degree of the MORB source mantle at mid-ocean ridge.
DS201502-0104
2015
Sobolev, A.V.Sobolev, N.V., Sobolev, A.V., Tomilenko, A.A., Kovyazin, S.V., Batanova, V.G., Kuzmin, D.V.Paragenesis and complex zoning of olivine macrocrysts from unaltered kimberlite of the Udachnaya-East pipe, Yakutia: relationship with the kimberlite formation conditions and evolution.Russian Geology and Geophysics, Vol. 56, 1, pp. 260-279.Russia, YakutiaDeposit - Udachnaya-East
DS201510-1805
2015
Sobolev, A.V.Sobolev, N.V., Sobolev, A.V., Tomilenko, A.A., Batanova, V.G., Tolstov, A.V., Logvinova, A.M., Kuzmin, D.V.Unique compositional pecularities of olivine phenocrysts from the post flood basalt Diamondiferous Malokuonapskaya kimberlite pipe, Yakutia.Doklady Earth Sciences, Vol. 463, 2, pp. 828-832.RussiaDeposit - Malokuonapskaya
DS201605-0903
2016
Sobolev, A.V.Sobolev, A.V., Asafov, E.V., Gurenko, A.A., Arndt, N.T., Batanova, V.G., Portnyagin, M.V., Garbe-Schonberg, D., Krasheninnikov, S.P.Komatites reveal a hydrous Archaen deep mantle reservoir.Nature, Vol. 531, Mar. 31, pp. 628-632.MantleMelting

Abstract: Archaean komatiites (ultramafic lavas) result from melting under extreme conditions of the Earth’s mantle. Their chemical compositions evoke very high eruption temperatures, up to 1,600 degrees Celsius, which suggests even higher temperatures in their mantle source1, 2. This message is clouded, however, by uncertainty about the water content in komatiite magmas. One school of thought holds that komatiites were essentially dry and originated in mantle plumes3, 4, 5, 6 while another argues that these magmas contained several per cent water, which drastically reduced their eruption temperature and links them to subduction processes7, 8, 9. Here we report measurements of the content of water and other volatile components, and of major and trace elements in melt inclusions in exceptionally magnesian olivine (up to 94.5?mole per cent forsterite). This information provides direct estimates of the composition and crystallization temperature of the parental melts of Archaean komatiites. We show that the parental melt for 2.7-billion-year-old komatiites from the Abitibi greenstone belt in Canada contained 30 per cent magnesium oxide and 0.6 per cent water by weight, and was depleted in highly incompatible elements. This melt began to crystallize at around 1,530 degrees Celsius at shallow depth and under reducing conditions, and it evolved via fractional crystallization of olivine, accompanied by minor crustal assimilation. As its major- and trace-element composition and low oxygen fugacities are inconsistent with a subduction setting, we propose that its high H2O/Ce ratio (over 6,000) resulted from entrainment into the komatiite source of hydrous material from the mantle transition zone10. These results confirm a plume origin for komatiites and high Archaean mantle temperatures, and evoke a hydrous reservoir in the deep mantle early in Earth’s history.
DS201610-1877
2016
Sobolev, A.V.Kamenetsky, V.S., Maas, R., Kamenetsky, M.B., Yaxley, G.M., Ehrig, K., Zellmer, G.F., Bindeman, I.N., Sobolev, A.V., Kuzmin, D.V., Ivanov, A.V., Woodhead, J., Schilling, J-G.Multiple mantle sources of continental magmatism: insights from "high-Ti" picrites of Karoo and other large igneous provinces.Chemical Geology, in press available 10p.Africa, South AfricaLIP magmatism

Abstract: Magmas forming large igneous provinces (LIP) on continents are generated by extensive melting in the deep crust and underlying mantle and associated with break-up of ancient supercontinents, followed by formation of a new basaltic crust in the mid-oceanic rifts. A lack of the unifying model in understanding the sources of LIP magmatism is justified by lithological and geochemical complexity of erupted magmas on local (e.g. a cross-section) and regional (a single and different LIP) scales. Moreover, the majority of LIP rocks do not fit general criteria for recognizing primary/primitive melts (i.e. < 8 wt% MgO and absence of high-Fo olivine phenocrysts). This study presents the mineralogical (olivine, Cr-spinel, orthopyroxene), geochemical (trace elements and Sr-Nd-Hf-Pb isotopes) and olivine-hosted melt inclusion compositional characteristics of a single primitive (16 wt% MgO), high-Ti (2.5 wt% TiO2) picrite with high-Mg olivine (up to 91 mol% Fo) from the Letaba Formation in the ~ 180 Ma Karoo LIP (south Africa). The olivine compositions (unusually high d18O (6.17‰), high NiO (0.36-0.56 wt%) and low MnO and CaO (0.12-0.20 and 0.12-0.22 wt%, respectively)) are used to argue for a non-peridotitic mantle source. This is supported by the enrichment of the rock and melts in most incompatible trace elements and depletion in heavy rare earth elements (e.g. high Gd/Yb) that reflects residual garnet in the source of melting. The radiogenic isotopes resemble those of the model enriched mantle (EM-1) and further argue for a long-term enrichment of the source in incompatible trace elements. The enriched high-Ti compositions, strongly fractionated incompatible trace elements, presence of primitive olivine and high-Cr spinel in the Letaba picrites are closely matched by olivine-phyric rocks from the ~ 260 Ma Emeishan (Yongsheng area, SW China) and ~ 250 Ma Siberian (Maimecha-Kotuy region, N Siberia) LIPs. However, many other compositional parameters (e.g. trace element and d18O compositions of olivine phenocrysts, Fe2 +/Fe3 + in Cr-spinel, Sr-Nd-Hf isotope ratios) only partially overlap or even diverge. We thus imply that parental melts of enriched picritic rocks with forsteritic olivine from three major continental igneous provinces - Karoo, Emeishan and Siberia cannot be assigned to a common mantle source and similar melting conditions. The Karoo picrites also exhibit some mineralogical and geochemical similarities with rocks and glasses in the south Atlantic Ridge and adjacent fracture zones. The geodynamic reconstructions of the continental plate motions since break-up of the Gondwanaland in the Jurassic support the current position of the source of the Karoo magmatism in the southernmost Atlantic. Co-occurrence of modern and recent anomalous rocks with normal mid-ocean ridge basalts in this region can be related to blocks/rafts of the ancient lithosphere, stranded in the ambient upper mantle and occasionally sampled by rifting-related decompressional melting.
DS201707-1337
2017
Sobolev, A.V.Kamenetsky, V.S., Maas, R., Kamenetsky, M.B., Yaxley, G.M., Ehrig, K., Zellmer, G.F., Bindeman, I.N., Sobolev, A.V., Kuzmin, D.V., Ivanov, A.V., Woodhead, J., Schilling, J-G.Multiple mantle sources of continental magmatism: insights from high Ti picrites of Karoo and other large igneous provinces.Chemical Geology, Vol. 455, pp. 22-31.Africa, South Africamagmatism

Abstract: Magmas forming large igneous provinces (LIP) on continents are generated by extensive melting in the deep crust and underlying mantle and associated with break-up of ancient supercontinents, followed by formation of a new basaltic crust in the mid-oceanic rifts. A lack of the unifying model in understanding the sources of LIP magmatism is justified by lithological and geochemical complexity of erupted magmas on local (e.g. a cross-section) and regional (a single and different LIP) scales. Moreover, the majority of LIP rocks do not fit general criteria for recognizing primary/primitive melts (i.e. < 8 wt% MgO and absence of high-Fo olivine phenocrysts). This study presents the mineralogical (olivine, Cr-spinel, orthopyroxene), geochemical (trace elements and Sr-Nd-Hf-Pb isotopes) and olivine-hosted melt inclusion compositional characteristics of a single primitive (16 wt% MgO), high-Ti (2.5 wt% TiO2) picrite with high-Mg olivine (up to 91 mol% Fo) from the Letaba Formation in the ~ 180 Ma Karoo LIP (south Africa). The olivine compositions (unusually high d18O (6.17‰), high NiO (0.36–0.56 wt%) and low MnO and CaO (0.12–0.20 and 0.12–0.22 wt%, respectively)) are used to argue for a non-peridotitic mantle source. This is supported by the enrichment of the rock and melts in most incompatible trace elements and depletion in heavy rare earth elements (e.g. high Gd/Yb) that reflects residual garnet in the source of melting. The radiogenic isotopes resemble those of the model enriched mantle (EM-1) and further argue for a long-term enrichment of the source in incompatible trace elements. The enriched high-Ti compositions, strongly fractionated incompatible trace elements, presence of primitive olivine and high-Cr spinel in the Letaba picrites are closely matched by olivine-phyric rocks from the ~ 260 Ma Emeishan (Yongsheng area, SW China) and ~ 250 Ma Siberian (Maimecha-Kotuy region, N Siberia) LIPs. However, many other compositional parameters (e.g. trace element and d18O compositions of olivine phenocrysts, Fe2 +/Fe3 + in Cr-spinel, Sr-Nd-Hf isotope ratios) only partially overlap or even diverge. We thus imply that parental melts of enriched picritic rocks with forsteritic olivine from three major continental igneous provinces – Karoo, Emeishan and Siberia cannot be assigned to a common mantle source and similar melting conditions. The Karoo picrites also exhibit some mineralogical and geochemical similarities with rocks and glasses in the south Atlantic Ridge and adjacent fracture zones. The geodynamic reconstructions of the continental plate motions since break-up of the Gondwanaland in the Jurassic support the current position of the source of the Karoo magmatism in the southernmost Atlantic. Co-occurrence of modern and recent anomalous rocks with normal mid-ocean ridge basalts in this region can be related to blocks/rafts of the ancient lithosphere, stranded in the ambient upper mantle and occasionally sampled by rifting-related decompressional melting.
DS201707-1376
2017
Sobolev, A.V.Trela, J., Gazel, E., Sobolev, A.V., Moore, L., Bizimis, M.The hottest lavas of the Phanerozoic and the survival of Archean reservoirs.Nature Geoscience, Vol. 10, 6, pp. 451-456.Mantleplumes

Abstract: Large igneous provinces and some hotspot volcanoes are thought to form above thermochemical anomalies known as mantle plumes. Petrologic investigations that support this model suggest that plume-derived melts originated at high mantle temperatures (greater than 1,500?°C) relative to those generated at ambient mid-ocean ridge conditions (about 1,350?°C). Earth’s mantle has also cooled appreciably during its history and the temperatures of modern mantle derived melts are substantially lower than those produced during the Archaean (2.5 to 4.0 billion years ago), as recorded by komatiites (greater than 1,700?°C). Here we use geochemical analyses of the Tortugal lava suite to show that these Galapagos-Plume-related lavas, which formed 89 million years ago, record mantle temperatures as high as Archaean komatiites and about 400?°C hotter than the modern ambient mantle. These results are also supported by highly magnesian olivine phenocrysts and Al-in-olivine crystallization temperatures of 1,570 ± 20?°C. As mantle plumes are chemically and thermally heterogeneous, we interpret these rocks as the result of melting the hot core of the plume head that produced the Caribbean large igneous province. Our results imply that a mantle reservoir as hot as those responsible for some Archaean lavas has survived eons of convection in the deep Earth and is still being tapped by mantle plumes.
DS201711-2532
2017
Sobolev, A.V.Trela, J., Gazel, E., Sobolev, A.V., Moore, L., Bizimis, M., Jicha, B., Batanova, V.G.The hottest lavas of the Phanerozoic and the survival of deep Archean reservoirs.Nature Geoscience, Vol. 10, pp. 451-456.Mantlegeodynamics - plumes

Abstract: Large igneous provinces and some hotspot volcanoes are thought to form above thermochemical anomalies known as mantle plumes. Petrologic investigations that support this model suggest that plume-derived melts originated at high mantle temperatures (greater than 1,500?°C) relative to those generated at ambient mid-ocean ridge conditions (about 1,350?°C). Earth’s mantle has also cooled appreciably during its history and the temperatures of modern mantle derived melts are substantially lower than those produced during the Archaean (2.5 to 4.0 billion years ago), as recorded by komatiites (greater than 1,700?°C). Here we use geochemical analyses of the Tortugal lava suite to show that these Galapagos-Plume-related lavas, which formed 89 million years ago, record mantle temperatures as high as Archaean komatiites and about 400?°C hotter than the modern ambient mantle. These results are also supported by highly magnesian olivine phenocrysts and Al-in-olivine crystallization temperatures of 1,570 ± 20?°C. As mantle plumes are chemically and thermally heterogeneous, we interpret these rocks as the result of melting the hot core of the plume head that produced the Caribbean large igneous province. Our results imply that a mantle reservoir as hot as those responsible for some Archaean lavas has survived eons of convection in the deep Earth and is still being tapped by mantle plumes.
DS201810-2301
2018
Sobolev, A.V.Chayka, I.F., Izokh, A.E., Sobolev, A.V., Batanova, V.G.Low titanium lamproites of the Ryabinoviy Massif ( Aldan shield): crystallization conditions and lithospheric source.Doklady Earth Sciences, Vol. 481, 2, pp. 1008-1012.Russia, Aldan shieldlamproite

Abstract: Obtained data shows that high-potassic dyke rocks of the Ryabinoviy massif (Central Aldan) belong to low-titanium lamproite series (Mediterranean type) and are distinct with “classic” high-titanium lamproites. Based on Al-in-olivine thermometer, temperature of olivine-chrome-spinel pair crystallization varies in range between 1100 and 1250°C. This suggests lithospheric mantle source for the parental melt and makes role of mantle plume insignificant. High-precision data on olivine composition and bulk rock traceelement composition imply mixed source for the parental melt, consisted of depleted peridotite and enriched domains, originated during ancient subduction.
DS201811-2577
2018
Sobolev, A.V.Gurenko, A.A., Sobolev, A.V.Can orthopyroxene be present in the source of Toro-Ankole, East African Rift, kamafugites?Journal of Petrology, Vol. 59, 8, pp. 1517-1550.Africa, Ugandakamafugites

Abstract: We have studied mineral-hosted melt, crystal and fluid inclusions from two ugandite, one mafurite and two katungite samples from the Toro-Ankole volcanic province in the East African Rift, which is the archetypal location for kamafugitic rocks. A main finding of our study is the presence of orthopyroxene as inclusions in an early generation of olivine from all three types of kamafugites, suggesting interaction of a carbonate-rich metasomatic agent with lithospheric peridotite mantle that may have caused almost complete dissolution of orthopyroxene. This process was preceded, accompanied or followed by the formation of phlogopite-clinopyroxene veins resulting from interaction of F-rich and low H2O/CO2 metasomatic fluids with the mantle rocks, which then became the source of the Toro-Ankole kamafugites. Pressure-temperature (P-T) estimates suggest that the parental kamafugitic melts last equilibrated with their source rocks at ~16?±?8?kbar and ~1160?±?130°C. This implies that they could have originated significantly below the solidus of dry, carbonated peridotite, but above the solidus of phlogopite-bearing clinopyroxenite. We conclude that the Toro-Ankole kamafugites originated by very low degrees of partial melting at moderately oxidized conditions (?FMQ = +2•2?±?0•4?atm log units, where FMQ is fayalite-magnetite-quartz buffer) under a high geothermal gradient of 60-80?mW?m-2, in response to lithospheric extension and probable association with an adjacent mantle plume. We estimate that differentiation of parental ugandite, mafurite and katungite magmas could have occurred at depths <12?km in the T range 1150-850°C. Laboratory-heated, homogenized melt inclusions trapped by a second generation of olivine and clinopyroxene are characterized by remarkable silica-undersaturation, compared with mid-ocean ridge basalt and ocean island basalt magmas, with high concentrations of alkalis, Ti, Ba, Sr and Zr, but varying to very low concentrations of Al and Ca. Such alkali-rich, strongly evolved melts might have resulted from extreme (>95%) fractional crystallization of the parental magmas, assuming their chemical compositions to be similar to those of the respective lavas. However, this estimate is about three times higher than the modal amount of phenocrysts in the lavas that could be reinforced by the presence of excess cognate crystals and/or xenocrysts in the lavas. Strong oxidation from FMQ?+?2 to FMQ?+?4 to +?5•2?atm log units of the evolved mafuritic magmas at ~900-1000°C has occurred during the final stage of magma evolution at very shallow crustal depths or possibly directly in the lava flow.
DS201907-1527
2019
Sobolev, A.V.Batanova, V.G., Thompson, J.M., Danyushevsky, L.V., Portnyagin, M.V., Garbe-Schonberg, D., Hauri, E., Kimura, J-I., Chang, Q., Senda, R., Goemann, K., Chauvel, C., Campillo, S., Ionov, D.A., Sobolev,A.V.New olivine reference material for in situ microanalysis.Geostandards and Geoanalytical Research, in press available, 21p.Asia, Mongoliaolivine

Abstract: A new olivine reference material - MongOL Sh11-2 - for in situ analysis has been prepared from the central portion of a large (20 × 20 × 10 cm) mantle peridotite xenolith from a ~ 0.5 My old basaltic breccia at Shavaryn-Tsaram, Tariat region, central Mongolia. The xenolith is a fertile mantle lherzolite with minimal signs of alteration. Approximately 10 g of 0.5-2 mm gem quality olivine fragments were separated under binocular microscope and analysed by EPMA, LA-ICP-MS, SIMS and bulk analytical methods (ID-ICP-MS for Mg and Fe, XRF, ICP-MS) for major, minor and trace elements at six institutions world-wide. The results show that the olivine fragments are sufficiently homogeneous with respect to major (Mg, Fe, Si), minor and trace elements. Significant inhomogeneity was revealed only for phosphorus (homogeneity index of 12.4), whereas Li, Na, Al, Sc, Ti and Cr show minor inhomogeneity (homogeneity index of 1-2). The presence of some mineral and fluid-melt micro-inclusions may be responsible for the inconsistency in mass fractions obtained by in situ and bulk analytical methods for Al, Cu, Sr, Zr, Ga, Dy and Ho. Here we report reference and information values for twenty-seven major, minor and trace elements.
DS201907-1576
2019
Sobolev, A.V.Sobolev, A.V., Asafov, E., Arndt, N., Portnyagin, M., Guenko, A.A., Batanova, G., Garbe-Schonberg, D., Wilson, A.H., Byerly, G., Batanova, V.Deep hydrous mantle reservoir provides evidence for crustal recycling before 3.3 billion years ago.Nature, 32p. Pdf availableMantlewater

Abstract: H2O strongly influences physical properties of the mantle and its ability to melt or convect and can trace recycling of surface reservoirs down to the deep mantle1,2. This makes knowledge of water content in the Earth's interior and its evolution through time crucial to understanding global geodynamics. Komatiites (MgO-rich ultramafic magmas) result from high-degree mantle melting at high pressures3 and thus are excellent probes of H2O contents in the deep mantle. A significant excess of H2O over elements of similar geochemical behavior during mantle melting (e.g. Ce) was recently found in melt inclusions in the most Mg-rich olivine in 2.7 Ga old komatiites from Canada4 and Zimbabwe5. These data were taken as evidence for a deep hydrated mantle reservoir, probably the transition zone, in the Neoarchean time. In this paper we confirm the mantle source of this H2O by measurement of deuterium to hydrogen ratios in these melt inclusions and present similar data for 3.3 Ga old komatiites from the Barberton Greenstone Belt. Using hydrogen isotopes, we show that the mantle sources of these melts contained excess H2O which implies that a deep mantle hydrated reservoir has been present in the Earth's interior at least since the Paleoarchean. The reconstructed initial hydrogen isotope composition of komatiites is significantly more depleted in deuterium than all surface reservoirs and typical mantle but resembles that in dehydrated subducted slabs. Together with a significant excess of chlorine and a temporal trend of Pb/Ce in the mantle sources of komatiites, these results argue that lithosphere recycling into the deep mantle, arguably via subduction, started before 3.3 Ga. (a un-reviewed version of the manuscript accepted for publication in Nature magazine).
DS202006-0914
2020
Sobolev, A.V.Chayka, I.F., Sobolev, A.V., Izokh, A.E., Batanova, V.G., Krasheninnikov, S.P., Chervyakovskaya, M.V., Kontonikas-Charos, A., Kutyrev, A.V., Lobastov, B.M., Chervyakovskiy, V.S.Fingerprints of kamafugite-like magmas in Mesozoic lamproites of the Aldan Shield: evidence from olivine and olivine-hosted inclusions.Minerals, Vol. 10, 4, 30p.Russia, Siberiadeposit - Ryabinoviy

Abstract: Mesozoic (125-135 Ma) cratonic low-Ti lamproites from the northern part of the Aldan Shield do not conform to typical classification schemes of ultrapotassic anorogenic rocks. Here we investigate their origins by analyzing olivine and olivine-hosted inclusions from the Ryabinoviy pipe, a well preserved lamproite intrusion within the Aldan Shield. Four types of olivine are identified: (1) zoned phenocrysts, (2) high-Mg, high-Ni homogeneous macrocrysts, (3) high-Ca and low-Ni olivine and (4) mantle xenocrysts. Olivine compositions are comparable to those from the Mediterranean Belt lamproites (Olivine-1 and -2), kamafugites (Olivine-3) and leucitites. Homogenized melt inclusions (MIs) within olivine-1 phenocrysts have lamproitic compositions and are similar to the host rocks, whereas kamafugite-like compositions are obtained for melt inclusions within olivine-3. Estimates of redox conditions indicate that “lamproitic” olivine crystallized from anomalously oxidized magma (?NNO +3 to +4 log units.). Crystallization of "kamafugitic" olivine occurred under even more oxidized conditions, supported by low V/Sc ratios. We consider high-Ca olivine (3) to be a fingerprint of kamafugite-like magmatism, which also occurred during the Mesozoic and slightly preceded lamproitic magmatism. Our preliminary genetic model suggests that low-temperature, extension-triggered melting of mica- and carbonate-rich veined subcontitental lithospheric mantle (SCLM) generated the kamafugite-like melts. This process exhausted carbonate and affected the silicate assemblage of the veins. Subsequent and more extensive melting of the modified SCLM produced volumetrically larger lamproitic magmas. This newly recognized kamafugitic "fingerprint" further highlights similarities between the Aldan Shield potassic province and the Mediterranean Belt, and provides evidence of an overlap between "orogenic" and "anorogenic" varieties of low-Ti potassic magmatism. Moreover, our study also demonstrates that recycled subduction components are not an essential factor in the petrogenesis of low-Ti lamproites, kamafugites and leucitites.
DS1991-1570
1991
Sobolev, A.Y.Shnai, G.K., Sobolev, A.Y., Igoshina, I.I.Lamproites of southern Verkhoyansk region.(Russian)Doklady Academy of Sciences Akademy Nauk SSSR, (Russian), Vol. 319, No. 4, pp. 957-961RussiaLamproites
DS1993-1455
1993
Sobolev, A.Ye.Shnay, G.K., Sobolev, A.Ye., Igoshina, I.I.Verkhoyansk-region lamproites resembling Australian diamond bearinglamproites.Doklady Academy of Sciences USSR, Earth Science Section, Vol. 319A, No. 6, Publishing July 1993, pp. 166-171.RussiaLamproites
DS1986-0768
1986
Sobolev, E.V.Sobolev, N.V., Sobolev, E.V., Yefimova, E.S.Some physical and chemical characteristics of diamonds from Copeton New south Wales. Reference to Proceedings 20th.International Gemmological Conference ptThe Australian Gemologist, Vol. 16, No. 3, p. 119. abstractAustraliaDiamond, Morphology
DS1991-1621
1991
Sobolev, E.V.Sobolev, E.V.The impurity centers and some problems of diamond genesisProceedings of Fifth International Kimberlite Conference held Araxa June 1991, Servico Geologico do Brasil (CPRM) Special, pp. 388-390RussiaPoly, orphisM., Diamond morphology, natural, nitrogen
DS1993-1498
1993
Sobolev, E.V.Sobolev, N.V., Galimov, E.M., Efimova, E.S., Sobolev, E.V.Crystalline inclusions, isotopes carbon, nitrogen centers in diamonds, features of garnet from Madjgawan.Russian Geology and Geophysics, Vol. 34, No. 12, pp. 77-83.IndiaDiamond inclusions, Deposit -Madjgawan
DS1995-1638
1995
Sobolev, E.V.Rylov, G.M., Sobolev, E.V.Investigation of B1 defects in natural diamonds using double crystaltechnique.Proceedings of the Sixth International Kimberlite Conference Abstracts, pp. 479-480.RussiaDiamond morphology, Diamond crystallography
DS1997-0568
1997
Sobolev, N.Kadik, A.A., Zharkova, E.V., Efimova, E.S., Sobolev, N.Redox conditions of the formation of diamond crystals: electrochemicalinvestigations.Doklady Academy of Sciences, Vol. 355A, No. 6, July-Aug. pp. 1370-74.GlobalDiamond morphology, Crystallography
DS2003-0733
2003
Sobolev, N.Koch-Muller, M., Dera, M., Fei, Y., Reno, B., Sobolev, N., Hauri, E.OH in synthetic and natural coesiteAmerican Mineralogist, Vol. 88, 10, Oct. pp. 1436-45.GlobalMineralogy - coesite
DS200412-1024
2003
Sobolev, N.Koch-Muller, M., Dera, M., Fei, Y., Reno, B., Sobolev, N., Hauri, E., Wysoczanski, R.OH in synthetic and natural coesite.American Mineralogist, Vol. 88, 10, Oct. pp. 1436-45.TechnologyMineralogy - coesite
DS200912-0707
2008
Sobolev, N.Sobolev, N., Wirth, R., Logvinova, A.M., Pokhilenko, N.P., Kuzmin, D.V.Retrograde phase transitions of majorite garnets included in diamonds: a case study of subcalcic Cr rich majorite pyrope from a Snap Lake diamond, Canada.American Geological Union, Fall meeting Dec. 15-19, Eos Trans. Vol. 89, no. 53, meeting supplement, 1p. abstractCanada, Northwest TerritoriesDeposit - Snap lake
DS201412-0504
2013
Sobolev, N.Lenaz, D., Skogby, H., Logvinova, A., Sobolev, N., Princivalle, F.A micro-mossbauer study of chromites included in diamond and other mantle related rocks.Physics and Chemistry of Minerals, Vol. 40, 9, pp. 671-679.Russia, SiberiaDiamond inclusions
DS201412-0861
2014
Sobolev, N.Sobolev, N.Ultrahigh pressure mineralogy of the continental lithosphere.ima2014.co.za, IMA Medallist lectureMantleUHP
DS201907-1572
2019
Sobolev, N.Shatsky, V., Jagoutz, E., Kozmenko, O., Ragozin, A., Skuzovatov, S., Sobolev, N.The protolith nature of diamondiferous metamorphic rocks of the Kokchetav Massif.Acta Geologica Sinica, Vol. 93, 1, p. 173-Russiadeposit - Kokchetav

Abstract: International Symposium on Deep Earth Exploration and Practices Beijing, China -October24-26, 2018The protolithnatureof diamondiferous metamorphic rocks of the Kokchetav MassifVladislav Shatsky1,2,3, Emil Jagoutz4, Olga Kozmenko1, Alexey Ragozin1,3, Sergei Skuzovatov2and Nikolai Sobolev1,31Sobolev Institute of Geology and Mineralogy SB RAS, Novosibirsk, 630090, Russia, Institute of Geochemistry SB RAS, Irkutsk, Russia3Novosibirsk State University, Novosibirsk, Russia4Max Planck Institute for Chemistry, Mainz, GermanyUltra-high-pressure diamondiferous rocks (UHP) of the Kokchetav subduction-collision zone are considered as an idealobject for studying the mobility of elements insubduction zones of the continental type. The compositional diversity of metasedimentary rocks subjected to UHP metamorphism makes it difficult to establish the nature of their protoliths. This, in turn, complicates estimatesof the degree of depletionof the UHP metamorphic rocks relative to the protoliths.To clarify the nature of protholiths of the Kokchetav diamondiferous rocks we studied the geochemical features and Sm-Nd isotopic composition of diamondiferous calc-silicate, garnet-pyroxene rocks, high-alumina metapelitesand barren granite-gneisses.The nine samples of the Kumdy Kol mocrodiamond deposit (one granite-gneiss, 4-calc-silicate rocks, 3-garnet-pyroxenite) yielded aSm-Nd whole-rockisochronageof 1052±44 Ma. This age is close to the age of formation of the granitic gneiss basement of the Kokchetav massif (1.2-1.05 Ga) (Glorie et al., 2015). Therefore, we assume that the protoliths of these rocks were basementrocks. In this interpretation, their geochemical features may not be directly related to the processes of ultrahigh-pressure metamorphism.At the same time, the high-alumina rocks of the Barchinsky area are depleted todifferent degreeswithrespect to LREE and K yieldeda whole-rockisochron with an age of 509 ± 32 Ma, which suggests partial melting of these rocks duringthe exhumation stage.It was previously assumed that metasedimentary rocks of the Kokchetav microcontinent are the protoliths of diamondiferous rocks (Buslov et al., 2015). However, this contradicts with Sm-Nd isotopic data for metasedimentary rocks of quartzite-schist sequences of the Kokchetav microcontinent (Kovach et al., 2017). The metasedimentary rocks of the Sharyk Formation are characterized by variations in the ?Nd(t)from +4.1 to -3.3 and intNd(DM)from 1.9 to 1.25 Ga, whereasin the UHP metamorphic rocks ?Nd(t)varies from -7.6 to -13.2, and the model ages range from 2.7 to 2.3 Ga. These data clearly indicate that the metasedimentary rocks of the Kokchetav massif could not be the protolith of the ultrahigh-pressure rocks.
DS201910-2297
2019
Sobolev, N.Shatsky, V., Ragozin, A., Logvinova, A., Wirth, R., Sobolev, N.Alluvial diamonds from iron-saturated mantle beneath the northeastern margin of Siberian craton.Goldschmidt2019, 1p. AbstractRussiacraton

Abstract: Diamonds of eclogitic paragenesis are dominant in the placer deposits in the northeastern part of the Siberian Craton. Multiple inclusions and host diamonds carbon isotopes composition are consistent with a mixing model in which they result from the interaction of slab-derived melt/fluid with surrounding mantle [1,2]. A significant portion of diamonds contains black inclusions usually interpreted as graphite or sulphides. Twenty six dark inclusions from the 22 diamonds were exposed by polishing for chemical microanalysis. Inclusions were studied with SEM, TEM and EMP. Fe-C-O melt inclusions in association with with Kfsp, Ol and silicate melt inclusions were identified. Most of the inclusions are heterogeneous in composition and consist of iron carbides, iron in various oxidation states and carbon. Carbides contain impurities of Ni (0-0.6%), Sr (up to 3.4%), Cr (up to 0.8%) Si (up to 1%). Inclusions of wustite and Fe-Ti-O melt were identified in one diamond along with inclusions of Fe-C-O melt. In two cases diamond inclusions found within host diamond crystal. Diamond inclusions are surronded by a border consisting of wustite and siderite. Inclusions of Fe-C-O melt in allivial diamonds are best explained by carbonate melt-iron reaction [3].
DS2002-1581
2002
Sobolev, N..V.Taylor, L.A., Sobolev, N..V., Ghazi, M., Anand, M., Bodner, R.J.The science of diamonds and their inclusions can such dat a be used to establish diamond provenance?Eos, American Geophysical Union, Spring Abstract Volume, Vol.83,19, 1p.BrazilDiamond - inclusions, sulphides
DS1960-0601
1965
Sobolev, N.S.Sobolev, N.S., Kuznetsova, I.K.More Facts on the Mineralogy of Eclogite from Yakutian Kimberlite.Doklady Academy of Science USSR, Earth Science Section., Vol. 163, No. 1-6, PP. 137-140.RussiaBlank
DS1960-0449
1964
Sobolev, N.V.Firsov, L.V., Sobolev, N.V.The Absolute Age of a Xenolith of Eclogite from the Obnazhennaya Kimberlite Pipe.Geologii i Geofiziki, No. 10, PP. 74-77.RussiaBlank
DS1960-0499
1964
Sobolev, N.V.Sobolev, N.V.An Eclogite With RubyDoklady Academy of Sciences AKAD. NAUK SSSR., Vol. 157, PP. 1382-1384.RussiaDiamond Morphology, Inclusion
DS1960-0500
1964
Sobolev, N.V.Sobolev, V.S., Sobolev, N.V.Xenoliths in the Kimberlites of Northern Yakutia. and Problems of the Structure of the Earth's Mantle.Doklady Academy of Science USSR, Earth Science Section., Vol. 158, PP. L08-LLL.RussiaBlank
DS1960-0602
1965
Sobolev, N.V.Sobolev, N.V., Kuznetsova, I.K.New Dat a on the Mineralogy of Eclogites from the Yakutian Kimberlite Pipes.Doklady Academy of Sciences AKAD. NAUK SSSR., Vol. 163, PP. 471-474.RussiaBlank
DS1960-0603
1965
Sobolev, N.V.Sobolev, N.V., Kuznetsova, I.K.New Dat a on the Mineralogy of Eclogites from the Yakutiann kimberlite Pipes.Doklady Academy of Sciences Nauk SSSR., Vol. 163, PP. 471-474.RussiaBlank
DS1960-0604
1965
Sobolev, N.V.Sobolev, V.S., Sobolev, N.V.Xenoliths in Kimberlite of Northern Yakutia and the Structure of the Mantle.Doklady Academy of Science USSR, Earth Science Section., Vol. 158, No. 1-6, PP. 22-25.RussiaBlank
DS1960-0747
1966
Sobolev, N.V.Sobolev, N.V., Kuznetsova, I.K.Mineralogy of Diamond Bearing EclogitesDoklady Academy of Sciences AKAD. NAUK SSSR., Vol. 167, No. 6, PP. 1365-1368.RussiaMineralogy
DS1960-0878
1967
Sobolev, N.V.Sobolev, N.V., Vakhrushev, V.A.Sulfides in Pyrope Peridotites in Kimberlites from YakutiaZap. Vses. Miner. Obshch., PT. 96, No. 4, P. 450.RussiaBlank
DS1960-0879
1967
Sobolev, N.V.Sobolev, V.S., Sobolev, N.V.Chromium and Chromium Bearing Minerals in Deep- Seated Xenoliths from Kimberlite Pipes.Geol. Rudn. Mestorozh., No. 9, PT. 2, PP. 10-16.RussiaBlank
DS1960-1029
1968
Sobolev, N.V.Sobolev, N.V.The Xenoliths of Eclogites from the Kimberlite Pipes of Yakutia As Fragments of the Upper Mantle Substance.International Geological Congress 23RD., Vol. 1, PP. 155-163.RussiaBlank
DS1960-1030
1968
Sobolev, N.V.Sobolev, N.V.Eklogit Xenoliths in den Kimberlite pipes von YakutienChem. Erde., Vol. 27, No. 2, PP. 164-177.RussiaBlank
DS1960-1031
1968
Sobolev, N.V.Sobolev, N.V.Eclogite Clinopyroxenes from the Kimberlite Pipes of YakutiaLithos, Vol. 1, PP. 54-57.Russia, YakutiaRelated Rocks, Classification
DS1960-1032
1968
Sobolev, N.V.Sobolev, N.V., Kuznetsova, I.K., Zyuzin, N.I.The Petrology of Grospydite Xenoliths from the Zagadochnaya kimberlite Pipe in Yakutia.Journal of Petrology, Vol. 9, PP. 253-280.RussiaBlank
DS1960-1212
1969
Sobolev, N.V.Sobolev, N.V., Lavrentyev, YU. G.Chrome Pyropes from Yakutian DiamondsDoklady Academy of Sciences AKAD. NAUK SSSR., Vol. 189, PP. 162-165.RussiaInclusions, Diamond Morphology
DS1970-0193
1970
Sobolev, N.V.Sobolev, N.V.Eclogites and Pyrope Peridotites from the Kimberlites of Yakutia.Phys. Earth Planetary Interiors, Vol. 3, PP. 398-404.RussiaBlank
DS1970-0421
1971
Sobolev, N.V.Sobolev, N.V.Some Specific Features of Distribution and Transportation Of Xenoliths in the Kimberlite Pipes of Yakutia.Journal of Geophysical Research, Vol. 76, PP. 1309-1314.RussiaBlank
DS1970-0439
1971
Sobolev, N.V.Vakhrushev, V.A., Sobolev, N.V.Sulfidic Formations in Deep Xenoliths from Kimberlites in Yakutia.International Geology Review, Vol. 15, No. 1, PP. 103-110.RussiaBlank
DS1970-0543
1972
Sobolev, N.V.Kharkiv, A.D., Sobolev, N.V., Chumirin, K.G.Inclusions of Chromium Diopside in Zircon from the Kimberlite rocks of the Malaya Botubuya Region.Zap. Vses. Miner, Obschch., Vol. 101, No. 6, PP. 431-433.RussiaPetrography
DS1970-0602
1972
Sobolev, N.V.Sobolev, N.V., et al.Crystalline Inclusions With Octahedral Faces in DiamondsDoklady Academy of Science USSR, Earth Science Section., Vol. 204, No. 1-6, PP. 117-120.RussiaKimberlite
DS1970-0603
1972
Sobolev, N.V.Sobolev, V.S., Sobolev, N.V., Lavrentyev, YU.G.Inclusions in Diamond from a Diamond Bearing EclogiteDoklady Academy of Sciences AKAD. NAUK SSSR., Vol. 207, PP. 164-167.RussiaDiamond Morphology
DS1970-0829
1973
Sobolev, N.V.Sobolev, N.V., Lavrentev, Y.G., Pokhilenko, N.P. USOVA.Chrome Rich Garnets from Kimberlites of Yakutia and their ParagenesesContributions to Mineralogy and Petrology, Vol. 40, pp. 39-52.Russia, YakutiaMineralogy - Garnets
DS1975-0089
1975
Sobolev, N.V.Green, D.H., Sobolev, N.V.Coexisting Garnets and Ilmenites Synthesized at High Pressure pressures from Pyrolite and Olivine Basanite and Their Significance for Kimberlitic Assemblages.Contributions to Mineralogy and Petrology, Vol. 50, PP. 217-229.South AfricaWesselton, Microprobe Analyses
DS1975-1229
1979
Sobolev, N.V.Sobolev, N.V.Deep Seated Inclusions in Kimberlites and the Problem of The Composition of the Upper Mantle.American Geophysical Union., 279P.RussiaKimberley, Diamond Morphology
DS1975-1230
1979
Sobolev, N.V.Sobolev, N.V.Deep seated Inclusions in Kimberlites and the Problem of The composition of the Upper Mantle.Washington: American Geophysical Union (agu), 279P.RussiaKimberlite, Kimberley, Janlib
DS1980-0320
1980
Sobolev, N.V.Sobolev, N.V.Significance of Picroilmenite for Locating Kimberlite FieldsSoviet Geology And Geophysics, Vol. 21, No. 10, PP. 127-128.RussiaBlank
DS1981-0386
1981
Sobolev, N.V.Sobolev, N.V.What the Siberian Diamonds Tell United StatesIndiaqua., Vol. 30, No. 3, PP. 11-13.RussiaKimberlite
DS1981-0387
1981
Sobolev, N.V.Sobolev, N.V., Efimova, E.S., Pospelova, L.N.Native Iron in Diamonds of Yakutiya and Its ParagenesisSoviet Geology And Geophysics, Vol. 22, No. 12, PP. 18-21.RussiaKimberlite, Inclusion, Crystallography
DS1981-0388
1981
Sobolev, N.V.Sobolev, V.S., Sobolev, N.V.Yakut Diamonds: Scientific Problems Connected with Their Study.Journal of GEMMOLOGICAL SOCIETY of JAPAN., Vol. 8, No. 1-8, PP.RussiaBlank
DS1982-0169
1982
Sobolev, N.V.Davis, G.L., Sobolev, N.V., Khar'kiv, A.D.New Dat a on the Age of Yakutian Kimberlites Obtained by The uranium Lead Method on Zircons.Doklady Academy of Sciences AKAD. NAUK SSSR., Vol. 254, No. 1, PP. 53-57.Russia, YakutiaPipes, Geochronology
DS1982-0396
1982
Sobolev, N.V.Marie, A.M., Mainprice, D.H., Sobolev, N.V.A Transmission Electron Microscopy Study of Olivine Inclusions in Diamond.Proceedings of Third International Kimberlite Conference, TERRA COGNITA, ABSTRACT VOLUME., Vol. 2, No. 3, P. 200, (abstract.).RussiaKimberlite, Udachnaya
DS1982-0500
1982
Sobolev, N.V.Pokhilenko, N.P., Sobolev, N.V., Efimova, E.S.Xenolith of Cataclazed Diamond Bearing Disthenic Eclogite from the Pipe 'udachnaia' Yakutia.Doklady Academy of Sciences AKAD. NAUK SSSR., Vol. 266, No. 1, PP. 212-216.RussiaBlank
DS1982-0502
1982
Sobolev, N.V.Ponomarenko, A.I., Spetsius, Z.V., Sobolev, N.V.New Type of Diamond Bearing Rock- Garnet PyroxeniteDoklady Academy of Science USSR, Earth Science Section., Vol. 251, No. 2, PP. 89-91.RussiaPetrography
DS1983-0354
1983
Sobolev, N.V.Kharkiv, A.D., Pokhilenko, N.P., Sobolev, N.V.Large Xenoliths of Cataclased Lherzolites from the Udachnaya Kimberlite Pipe of Yakutia.Soviet Geology And Geophysics, Vol. 24, No. 1, PP. 67-72.RussiaMineralogy
DS1983-0569
1983
Sobolev, N.V.Shatskiy, V.S., Sobolev, N.V., Pavlyuchenko, V.S.Xenoliths of rocks with fassaite garnet anorthite in Udachnaya kimberliticpipe, Yakutia.(Russian)Doklady Academy of Sciences Akademy Nauk SSSR, (Russian), Vol. 272, No. 1, pp. 188-192RussiaBlank
DS1983-0641
1983
Sobolev, N.V.Yefimova, E.S., Sobolev, N.V., Pospelova, L.N.Sulfide Inclusions in Diamonds and their Paragenesis.(russian)Zap. Vses Mineral. Obshch., (Russian), Vol. 112, No. 3, pp. 300-310RussiaInclusions, Diamond Morphology
DS1984-0001
1984
Sobolev, N.V.Afanasev, V.P., Sobolev, N.V., Kharkiv, A.D.The Evolution of the Chemical Composition of Pyrope Associations in Old Dispersion Halos Around Kimberlite Bodies.Soviet Geology And Geophysics, Vol. 25, No. 2, PP. 130-135.RussiaGeochemistry
DS1984-0129
1984
Sobolev, N.V.Bakumenko, I.T., Sobolev, N.V., Khokhriakov, A.F., Chepurov, A.Faceted Inclusions in Diamond CrystalsDoklady Academy of Sciences AKAD. NAUK SSSR., Vol. 278, No. 6, PP. 1461-1465.RussiaDiamond Morphology
DS1984-0591
1984
Sobolev, N.V.Pokhilenko, N.P., Sobolev, N.V., Yefimova, YE.S.Xenolith of Broken Down Diamond Bearing Kyanite Eclogite From the Udachnaya Pipe, Yakutia.Doklady Academy of Science USSR, Earth Science Section., Vol. 266, No. 1-6, MAY PP. 90-94.Russia, YakutiaLherzolite, Geothermometry, Genesis, Diamond Morphology
DS1984-0613
1984
Sobolev, N.V.Rodionov, A.S., Pokhilenko, N.P., Sobolev, N.V.Comparative Description of Major Minerals of the Concentrate of the Two Varieties of Kimberlite of the Dalnyi Pipe of Yakutia.Soviet Geology And Geophysics, Vol. 25, No. 5, PP. 33-44.Russia, YakutiaMineralogy
DS1984-0688
1984
Sobolev, N.V.Sobolev, N.V.Crystalline Inclusions in Diamonds from New South Wales, Australia. #1University of Western Australia - Special Publication, No. 8, PP. 213-226AustraliaBlank
DS1984-0689
1984
Sobolev, N.V.Sobolev, N.V.Crystalline Inclusions in Diamonds from New South Wales, Australia. #2Kimberlite Occurrence And Origin A Basis For Conceptual Mode, P. 23. (abstract.)Australia, New South Wales, CopetonInverell, Mineralogy, Natural, Diamonds, Morphology, Mineral Chemistry
DS1984-0690
1984
Sobolev, N.V.Sobolev, N.V.Kimberlites of the Siberian Platform Their Geological and Mineralogical Features.Kimberlite Occurrence And Origin A Basis For Conceptual Mode, PP. 27-28. (abstract.)Russia, YakutiaGeology, Classification, Distribution, Mineralogy, Geochronology
DS1984-0691
1984
Sobolev, N.V.Sobolev, N.V.Kimberlites of the Siberian Platform: Their Geological and Mineralogical Features.University of Western Australia - Special Publication, No. 8, PP. 275-289.Russia, Siberia, YakutiaAge, Mineralogy, Paragenesis, Pyrope, Spinel, Picroilmenite
DS1984-0692
1984
Sobolev, N.V.Sobolev, N.V., Efimova, E.S., Lavrentiev, I.G., Sobolev, V.S.Predominating Calc-silicate Association of Crystalline Inclusions in Diamonds from the South Australia Placers.Doklady Academy of Sciences AKAD. NAUK SSSR., Vol. 274, No. 1, PP. 172-179.Australia, South AustraliaAlluvial Diamond Deposits, Mineralogy
DS1984-0693
1984
Sobolev, N.V.Sobolev, N.V., Pokhilenko, N.P., Efimova, E.S.Diamond Bearing Peridotite Xenoliths in Kimberlites and The problem of the Origin of Diamonds.Soviet Geology And Geophysics, Vol. 25, No. 12, PP. 62-76.RussiaGenesis
DS1984-0694
1984
Sobolev, N.V.Sobolev, N.V., Pokhilenko, N.P., Efimova, E.S.Xenoliths of Diamond Bearing Peridotites in Kimberlites And the Problem of Diamonds Origin.Geologii i Geofiziki, No. 12, (300) DECEMBER PP. 63-RussiaGenesis, Petrography
DS1984-0695
1984
Sobolev, N.V.Sobolev, N.V., Yefimova, E.S.Dominant calcsilicate association of crystalline inclusions in placer diamonds from southeastern AustraliaDoklady Academy of Science USSR, Earth Science Section, Vol. 274, Jan-Feb. pp. 148-152Australia, InverellPlacers, Inclusions
DS1985-0323
1985
Sobolev, N.V.Kaminskiy, F.V., Sobolev, N.V.The carbon isotopic composition variations within diamondcrystals.(Russian)Doklady Academy of Sciences Akademy Nauk SSSR, (Russian), Vol. 285, No. 6, pp. 1436-1438RussiaDiamond Morphology
DS1985-0552
1985
Sobolev, N.V.Radionov, A.S., Sobolev, N.V.A New Find of Graphite Containing Harzburgite Xenoliths Inkimberlite.(russian)Geol. Geofiz., (Russian), No. 12, pp. 32-37RussiaHarzburgite
DS1985-0568
1985
Sobolev, N.V.Rodionov, A.S., Sobolev, N.V.A New Find of Xenolith of Graphite Bearing Harzburgite in KimberliteSoviet Geology and Geophysics, Vol. 26, No. 12, December pp. 26-32RussiaXenolith, Petrology
DS1985-0608
1985
Sobolev, N.V.Shatskiy, V.S., Sobolev, N.V.Pyroxene-plagioclase Symplektites in Eclogites of the Kokchetav MassifSoviet Geology and Geophysics, Vol. 26, No. 9, pp. 76-81RussiaEclogite
DS1985-0609
1985
Sobolev, N.V.Shatskiy, V.S., Sobolev, N.V., Pavlyuchenko, V.S.Fassaite Garnet Anorthite Xenolith from the Udchanaya Kimberlite Pipe, Yakutia.Doklady Academy of Science USSR, Earth Science Section., Vol. 272, No. 1-6, MARCH PP. 137-140.Russia, YakutiaPetrography
DS1985-0634
1985
Sobolev, N.V.Sobolev, A.V., Sobolev, N.V., Smit, K.B.New Dat a on the Petrology of Olivine Lamproites of Western Australia Based on Results of the Investigation of Magmatic Inclusions in Olivines.Doklady Academy of Sciences AKAD. NAUK SSSR., Vol. 284, No. 1, PP. 196-Australia, Western AustraliaLamproite, Petrology
DS1985-0635
1985
Sobolev, N.V.Sobolev, A.V., Sobolev, N.V., Smit, K.B., Kononkova, N.N.New dat a on the petrology of olivine lamproites of Western australia From the results of the investigation of magmatic inclusions in olivines.(Russian)Doklady Academy of Sciences Akademy Nauk SSSR, (Russian), Vol. 284, No. 1, pp. 196-201AustraliaLamproite, Inclusions
DS1985-0636
1985
Sobolev, N.V.Sobolev, N.V., Yefimova, E.S., Lavrentyev, YU.G., Sobolev, V.S.Dominant calc-silicate association of crystalline inclusions in placer diamonds from southeastern AustraliaDoklady Academy of Science USSR, Earth Science Section, Vol. 275, April pp. 148-152AustraliaNew South Wales, Diamond Morphology
DS1986-0029
1986
Sobolev, N.V.Arseniev, T.A., Zilbertski, A.K., Sobolev, N.V.The estimation of pressure experiences by crystals of olivinefromkimberlites.(Russian)Doklady Academy of Sciences Akademy Nauk SSSR, (Russian), Vol. 286, No. 5, pp. 1220-1223RussiaPetrology
DS1986-0030
1986
Sobolev, N.V.Arsenyeva, T.A., Zilbershteyn, A.K., Sobolev, N.V.Evaluation of experimental pressure on olivine crystals inkimberlites.(Russian)Doklady Academy of Sciences Akademy Nauk SSSR., (Russian), Vol. 286, No. 5, pp. 1220-1223RussiaExperimental Petrology
DS1986-0042
1986
Sobolev, N.V.Bakumenko, I.T., Sobolev, N.V., Khokryakov, A.F., Chepurov, A.I.Faceted inclusions in diamond crystalsDoklady Academy of Science USSR, Earth Science Section, Vol. 278, No. 1-6, pp. 168-170RussiaDiamond morphology, Inclusions
DS1986-0506
1986
Sobolev, N.V.Lucas, H., Ramsay, R., Hall, A.E., Smith, C.B., Sobolev, N.V.Garnets from West Australian kimberlites and associated rocksProceedings of the Fourth International Kimberlite Conference, Held Perth, Australia, No. 16, pp. 270-272AustraliaBlank
DS1986-0647
1986
Sobolev, N.V.Pokhilenko, N.P., Sobolev, N.V.Xenoliths of Diamondiferous peridotites from Udachnaya kimberlite pipe, YakutiaProceedings of the Fourth International Kimberlite Conference, Held Perth, Australia, No. 16, pp. 309-310RussiaBlank
DS1986-0690
1986
Sobolev, N.V.Ryabchikov, I.D., Solovova, I.P., Sobolev, N.V., Sobolev, A.V.Nitrogen in lamproitic magmas.(Russian)Doklady Academy of Sciences Akademy Nauk SSSR, (Russian), Vol. 288, No. 4, pp. 976-979RussiaLamproite
DS1986-0762
1986
Sobolev, N.V.Sobolev, A.V., Sobolev, N.V., Smith, C.B., Dubessy, J.Pecularities in the fluid and melt compositions of the lamproites And kimberlites based on the study of inclusions inolivinesProceedings of the Fourth International Kimberlite Conference, Held Perth, Australia, No. 16, pp. 93-94Australia, Russia, ArkansasLamproite
DS1986-0763
1986
Sobolev, N.V.Sobolev, N.V.The geology of upper Paleozoic diamond bearing deposits of the Tunguskasynclise.(Russian)Trudy Institute Geologii i Geofiziki, (Russian), Vol. 646, 192pRussiaDeposits, Diamond
DS1986-0764
1986
Sobolev, N.V.Sobolev, N.V., Kharkiv, A.D., et al.Garnet crystals with diamond inclusions from kimberlites of the pipe IMXXIII Svezd. KPSS, Yakutia.(Russian)Mineral. Zhurn., (Russian), Vol. 8, No. 2, pp. 23-31RussiaDiamond morphology
DS1986-0765
1986
Sobolev, N.V.Sobolev, N.V., Kharkiv, A.D., Pkhilenko, N.P.Kimberlites, lamproites and the problem of upper mantlecomposition.(Russian)Geol. Geofiz., (Russian), No. 7, pp. 18-29RussiaLamproites
DS1986-0766
1986
Sobolev, N.V.Sobolev, N.V., Kharkiv, A.D., Pokhilenko, N.P.Kimberlites, lamproites and the composition of the upper mantleSoviet Geology and Geophysics, Vol. 27, No. 7, pp. 10-18RussiaKimberlite, Lamproite
DS1986-0767
1986
Sobolev, N.V.Sobolev, N.V., Pokhilenko, N.P., Carswell, D.A., Rodionov, A.S.Sheared lherzolites from kimberlites of YakutiaProceedings of the Fourth International Kimberlite Conference, Held Perth, Australia, No. 16, pp. 338-339RussiaBlank
DS1986-0768
1986
Sobolev, N.V.Sobolev, N.V., Sobolev, E.V., Yefimova, E.S.Some physical and chemical characteristics of diamonds from Copeton New south Wales. Reference to Proceedings 20th.International Gemmological Conference ptThe Australian Gemologist, Vol. 16, No. 3, p. 119. abstractAustraliaDiamond, Morphology
DS1986-0769
1986
Sobolev, N.V.Sobolev, N.V., Yefimova, E.S., Shermanina, E.I.Crystalline inclusions in alluvial diamonds from the Urals, USSRProceedings of the Fourth International Kimberlite Conference, Held Perth, Australia, No. 16, p. 429RussiaDiamond inclusions
DS1986-0841
1986
Sobolev, N.V.Vishnevskii, S.A., Dolgov, Yu.A., Sobolev, N.V.Lamproites of the Talakhtakh diatreme on the eastern slope of the AnabarshieldSoviet Geology and Geophysics, Vol. 27, No. 8, pp. 15-24RussiaLamproite
DS1987-0016
1987
Sobolev, N.V.Arsenyeva, T.A., Zilbershteyn, A.Kh., Sobolev, N.V.Determination of the hydrostatic pressure experienced at depth by olivine crystals from kimberliteDokl. Acad. Sciences USSR Earth Science Section, Vol. 286, No. 1-6, September pp. 143-146RussiaBlank
DS1987-0329
1987
Sobolev, N.V.Kaminskiy, F.V., Sobolev, N.V.Variations of the isotope distribution within diamond crystalsDoklady Academy of Science USSR, Earth Science Section, Vol. 285, No. 6, pp. 155-157RussiaBlank
DS1987-0557
1987
Sobolev, N.V.Osorgin, N.Yu., Palyanov, Yu.N., Sobolev, N.V., et al.Fluid inclusions in diamond crystals.(Russian)Doklady Academy of Sciences Akademy Nauk SSSR, (Russian), Vol.l 293, No. 5, pp. 1214-1217RussiaDiamond morphology, Diamond inclusions
DS1987-0558
1987
Sobolev, N.V.Osorgin, N.Yu., Palyanov, Yu.N., Sobolev, N.V., Khokhryakova, I.P., et al.Inclusions of liquified gases in diamond crystals.(Russian)Doklady Academy of Sciences Akademy Nauk SSSR (Russian), Vol. 293, No. 5, pp. 1214-1217RussiaGeochemistry, diamond
DS1987-0694
1987
Sobolev, N.V.Sobolev, A.V., Sobolev, N.V., Smith, C.B., Kononkova, N.N.New dat a on the petrology of the olivine lamproites of Western Australia revealed by the study of magmatic inclusions inolivineDoklady Academy of Science USSR, Earth Science Section, Vol. 284, No. 5, Publishing July 1987, pp. 106-110AustraliaLamproite, Petrology
DS1987-0695
1987
Sobolev, N.V.Sobolev, N.V.Mantle xenoliths and continental lithosphere compositionGeodynamic series in: composition, structure and dynamics of the, Vol. 16, pp. 161-164GlobalBlank
DS1987-0696
1987
Sobolev, N.V.Sobolev, N.V., Nixon, P.H.Xenoliths from the USSR and Mongolia: a selective and brief reviewin: Nixon, P.H. ed. Mantle xenoliths, J. Wiley, pp. 159-166RussiaBlank
DS1988-0528
1988
Sobolev, N.V.Osorgin, N.Yu., Palyanov, Yu. N., Sobolev, N.V., KhokhryakovaLiquified gas inclusions in diamond crystalsDoklady Academy of Science USSR, Earth Science Section, Vol. 293, No. 1-6, September pp. 150-153RussiaDiamond inclusions
DS1989-0393
1989
Sobolev, N.V.Efimova, E.S., Zakharchenko, O.D., Sobolev, N.V., Makhin, A.I.Inclusions in diamonds from a kimberlite pipe.(Russian)Zap. Vses. Mineral. O-Va, (Russian), Vol. 118, No. 2, pp. 74-76RussiaDiamond morphology, Diamond inclusions
DS1989-0462
1989
Sobolev, N.V.Galimov, E.M., Kaminskiy, F.V., Maltsev, K.A., Sobolev, N.V.Relation of carbon isotopic composition with parageneses of mineral inclusions in diamonds in paired kimberlite pipes.(Russian)Geochemistry International (Geokhimiya), (Russian), No. 5, pp. 754-758RussiaGeochronology - C Isotope, Diamond inclusions
DS1989-0463
1989
Sobolev, N.V.Galimov, E.M., Sobolev, N.V., Yefimova, E.S.Isotopic composition of carbon of diamond bearing mineral inclusions From the northern Urals placers.(Russian)Geochemistry International (Geokhimiya), (Russian), No. 9, pp. 1363-1370RussiaDiamond inclusions, Geochronology
DS1989-0696
1989
Sobolev, N.V.Jagoutz, E., Shatsky, V.S., Sobolev, N.V., Pokhilenko, N.P.lead-neodymium-Sr isotope study of the Kokchetav Massif;the outcrop of the lowerlithosphereDiamond Workshop, International Geological Congress, July 15-16th. editors, pp. 32-35. AbstractRussiaMantle, Geochronology
DS1989-0739
1989
Sobolev, N.V.Kadik, A.A., Sobolev, N.V., Zharkova, E.V., Pokhilenko, N.P.Redox conditions of formation of diamond bearing peridotite xenoliths from Udachnaya kimberlite pipe,Yakutia.(Russian)Geochemistry International (Geokhimiya), (Russian), No. 8, August pp. 1120-1135RussiaGeochemistry, Xenoliths - peridotite
DS1989-0901
1989
Sobolev, N.V.Lucas, H., Ramsay, R.R., Hall, A.E., Smith, C.B., Sobolev, N.V.Garnets from Western Australian kimberlites and related rocksGeological Society of Australia Inc. Blackwell Scientific Publishing, Special, No. 14, Vol. 2, pp. 809-819AustraliaLamproite, Heavy minerals, Geochemist
DS1989-1378
1989
Sobolev, N.V.Shatsky, V.S., Sobolev, N.V., Yefimova, E.S.Morphological features of accessory microdiamonds from metamorphic Rocks of the earth's crustDiamond Workshop, International Geological Congress, July 15-16th. editors, pp. 94-95. AbstractRussiaMicrodiamond, Metamorphic rocks
DS1989-1419
1989
Sobolev, N.V.Sobolev, A.V., Sobolev, N.V., Smith, C.B., Dubessy, J.Fluid and melt compositions in lamproites And kimberlites based on the study of inclusions inolivineGeological Society of Australia Inc. Blackwell Scientific Publishing, Special, No. 14, Vol. 1, pp. 220-240Australia, RussiaEllendale, Mt. Cedric, Udachnaya, Geochemistry
DS1989-1420
1989
Sobolev, N.V.Sobolev, N.V.Petrology of the upper mantle and the origin of diamonds; selectedworks.(Russian)Izd. Nauka Novosibirsk, (Russian), 234p.ISBN 5-02-028811 VN G5607 92-29554-B, ; 92-22604-B.RussiaMantle, Diamonds
DS1989-1421
1989
Sobolev, N.V.Sobolev, N.V.Significance of diamonds in metamorphic rocksDiamond Workshop, International Geological Congress, July 15-16th. editors, p. 117RussiaMetamorphic rocks, Microdiamonds
DS1989-1422
1989
Sobolev, N.V.Sobolev, N.V., Galimov, E.M., Smith, C.B., Yefimova, E.S., MaltsevA comp study of the morphology, inclusions and C I composition of diamondsSoviet Geology and Geophysics, Vol. 30, No. 12, pp. 1-19AustraliaMicrodiamonds, Alluvial diamonds
DS1989-1423
1989
Sobolev, N.V.Sobolev, N.V., Shatskii, V.S., Kholdeev, O.V.Erroneous identification of diamonds in garnets from slightly gneissosedgranites.Comments.(Russian)Geol. Geofiz. (Russian), No. 7, pp. 129-130RussiaDiamond inclusions, Granites
DS1989-1424
1989
Sobolev, N.V.Sobolev, N.V., Shatskii, V.S., Kholdeev, O.V.Mistaken identification of diamond crystals in garnets from slightly gneissic granites( in connection with the publications of V.K. Garanin et al.)Soviet Geology and Geophysics, Vol. 30, No. 7, pp. 120-124RussiaDiamond morphology, Granites
DS1989-1425
1989
Sobolev, N.V.Sobolev, N.V., Shvedanko, G.I., et al.Nitrogen in chromites and olivines coexisting with diamonds.(Russian)Doklady Academy of Sciences Akademy Nauk SSSR, (Russian), Vol. 309, No. 3, pp. 697-700RussiaDiamond inclusions, Nitrogen-chromites/olivin
DS1989-1426
1989
Sobolev, N.V.Sobolev, N.V., Sobolev, A.V., Pokhilenko, N.P., Yefimova, E.S.Chrome spinels coexisting with Yakutian diamondsDiamond Workshop, International Geological Congress, July 15-16th. editors, pp. 105-108. AbstractRussiaMineral chemistry, Chrome spinels
DS1990-0506
1990
Sobolev, N.V.Galimov, E.M., Kaminisky, F.V., Maltsev, K.A., Sobolev, N.V.The relation between delta 13 C and mineral inclusion assemblages in diamonds from paired kimberlite pipesGeochemistry International, Vol. 26, No. 12, pp. 134-137RussiaDiamond inclusions, carbon, Delta 13 C analyses
DS1990-0508
1990
Sobolev, N.V.Galimov, E.M., Sobolev, N.V., Yefimova, E.S., Shemanina, Ye.I.Carbon isotope composition of inclusion bearing diamonds from north UralplacersGeochemistry Int, Vol. 27, No. 4, pp. 131-138RussiaGeochronology CI, Placers
DS1990-0752
1990
Sobolev, N.V.Jagoutz, E., Shatsky, V.S., Sobolev, N.V.Sr-Neodymium-Palladium isotopic study of ultra high pressuret rocks from Kokchetav massifEos, Vol. 71, No. 43, October 23, p. 1707 AbstractRussiaMetamorphic rocks, Diamonds
DS1990-0793
1990
Sobolev, N.V.Kadik, A.A., Sobolev, N.V., Zharkova, Ye.V., Pokhilenko, N.P.Redox conditions of formation of diamond bearing peridotite xenoliths In the Udachnaya kimberlite pipe, YakutiaGeochemistry Int, Vol. 27, No. 4, pp. 41-54RussiaRedox Udachnaya, Peridotite
DS1990-1341
1990
Sobolev, N.V.Shatskii, V.S., Jagoutz, E., Sobolev, N.V., Kozmenko, O.A.Geochemical characteristics of crustal rocks subducted into the uppermantleEos, Vol. 71, No. 43, October 23, p. 1707 AbstractRussiaMetamorphic rocks, Diamonds
DS1990-1386
1990
Sobolev, N.V.Sobolev, N.V., Abouassaleh, K., Kepezhinskas, K.B., ledneva, V.P.Lamprophyres of Cretaceous diatremes of the Syrian rift.(Russian)Doklady Academy of Sciences Akademy Nauk SSSR, (Russian), Vol. 314, No. 2, pp. 435-439SyriaLamprophyres, Diatremes
DS1990-1387
1990
Sobolev, N.V.Sobolev, N.V., Mankenda, A., Kaminsky, F.V., Sobolev, V.N.Garnets from kimberlites of north-east Angola and relation of Their composition with diamond content.(Russian)Doklady Academy of Sciences Akademy Nauk SSSR, (Russian), Vol. 315, No. 5, pp. 1225-1229AngolaGarnets and diamonds, Mineralogy
DS1990-1388
1990
Sobolev, N.V.Sobolev, N.V., Shatskii, V.S., Vavilov, M.A.Mineralogical indicators of ultrahigh pressure metamorphism in eclogite bearing complex of Kokchetav Massif, USSRInternational Mineralogical Association Meeting Held June, 1990 Beijing China, Vol. 2, extended abstract p. 890-891RussiaEclogite, Mineralogy -inclusions
DS1990-1389
1990
Sobolev, N.V.Sobolev, N.V., Shatskii, V.S., Vavilov, M.A.Ultra high pressure mineral assemblages of inclusions in garnets, zircon sand clinopyroxenes from Diamondiferous metamorphic rocks, northern Kazakhstan, USSREos, Vol. 71, No. 43, October 23, p. 1707 AbstractRussiaMetamorphic rocks, Diamonds
DS1990-1390
1990
Sobolev, N.V.Sobolev, N.V., Shatsky, V.S.Diamond inclusions in garnet from metamorphic rocks: a new environment for diamond formationNature, Vol. 343, No. 6160, February 22, pp. 742-746RussiaDiamond inclusions, Garnet analyses -Metamorp
DS1991-0003
1991
Sobolev, N.V.Afanasev, V.P., Sobolev, N.V., Pokhilenko, N.P.Exogenous changes of the indicator minerals at the formation of mineralogical halos of kimberlite bodiesProceedings of Fifth International Kimberlite Conference held Araxa June 1991, Servico Geologico do Brasil (CPRM) Special, pp. 1-2RussiaAlluvial, Diamonds -mineralogy
DS1991-0272
1991
Sobolev, N.V.Claoue-Long, J.C., Sobolev, N.V., Shatsky, V.S., Sobolev, A.V.Zircon response to diamond -pressure metamorphism in the Kokchetav USSRGeology, Vol. 19, No. 7, July pp. 710-713RussiaMicroprobe-SHRIMP, Geochronology -age populations
DS1991-0607
1991
Sobolev, N.V.Griffin, W.L., Gurney, J.J., Sobolev, N.V., Ryan, C.G.Comparative geochemical evolution of cratonic lithosphere: South Africa andSiberiaProceedings of Fifth International Kimberlite Conference held Araxa June 1991, Servico Geologico do Brasil (CPRM) Special, pp. 119-121South Africa, RussiaGeochemistry, Craton, mineralogy
DS1991-0610
1991
Sobolev, N.V.Griffin, W.L., Ryan, C.G., Gurney, J.J., Sobolev, N.V., Win, T.T.Chromite macrocrysts in kimberlites and lamproites: geochemistry and origin #1Proceedings of Fifth International Kimberlite Conference held Araxa June, pp. 142-144South Africa, RussiaGeochemistry -chrome-spinels, Mantle, exploration
DS1991-0636
1991
Sobolev, N.V.Gurney, J.J., Moore, R.O., Griffin, W.L., Sobolev, N.V.The use of macrocryst minerals to predict diamond potential in kimberlites based on Southern Africa and a comparison with SiberiaGeological Society The Canadian Institute of Mining, Metallurgy and Petroleum (CIM) First Annual Field Conference symposium held, 2pg. abstractSouth Africa, RussiaDiamond potential, Garnet, nickel thermometry
DS1991-0777
1991
Sobolev, N.V.Jacob, D., Jagoutz, E., Sobolev, N.V.A diamond graphite bearing eclogitic xenolith from Roberts Victor-indication for petrogenesis from lead, neodymium, and Sr isotopesProceedings of Fifth International Kimberlite Conference held Araxa June 1991, Servico Geologico do Brasil (CPRM) Special, pp. 190-192South AfricaGeochronology, Geochemistry
DS1991-0794
1991
Sobolev, N.V.Jerde, E.A., Taylor, L.A., Sobolev, N.V., Crozaz, G.Rare earth elements in Diamondiferous eclogites from Yakutia, Siberia:evidence for source region variabilityEos Transactions, Vol. 72, No. 44, October 29, abstract p. 517Russia, Yakutia, SiberiaEclogites, rare earth elements (REE).
DS1991-1007
1991
Sobolev, N.V.Logvinova, A.M., Sobolev, N.V.Crystalline inclusions in chromites from kimberlites and lamproitesProceedings of Fifth International Kimberlite Conference held Araxa June 1991, Servico Geologico do Brasil (CPRM) Special, p. 240Russia, AustraliaYakutia, Udachnaya, Aikhal, Mir, International, Ellendale, Olivine inclusions
DS1991-1360
1991
Sobolev, N.V.Pokhilenko, N.P., Pearson, D.G., Boyd, F.R., Sobolev, N.V.Megacrystalline dunites and peridotites: hosts for Siberian diamondsCarnegie Institute Annual Report of the Director Geophysical Laboratory, No. 2250, pp. 11-18Russia, SiberiaDunites, Peridotites
DS1991-1446
1991
Sobolev, N.V.Rodionov, A.S., Sobolev, N.V., Pokhilenko, N.P., Suddaby, P.Ilmenite-bearing peridotites and megacrysts from Dalnaya kimberlite pipe, YakutiaProceedings of Fifth International Kimberlite Conference held Araxa June 1991, Servico Geologico do Brasil (CPRM) Special, pp. 339-341RussiaMineral chemistry, ilmenite-pyrope lherzolite, Ilmenite-pyrope wehrlites, Metasomatism
DS1991-1560
1991
Sobolev, N.V.Shatskiy, V.S., Sobolev, N.V., Zayachkov, A.A., Zorin, Y.M.A new manifestation of micro-diamonds in metamorphic rocks as an evidence of the regional character of high-pressure metamorphism in KokchetavMassif.(in Russian)Doklady Academy of Sciences Akademy Nauk SSSR, (Russian), Vol. 321, No. 1, pp. 189-193. # HB124RussiaMicrodiamonds, Metamorphic rocks
DS1991-1561
1991
Sobolev, N.V.Shatsky, V.S., Sobolev, N.V., Zayachkovsky, A.A., Zorin, Y.M., Vavtlov, M.A.New occurrence of microdiamonds in metamorphic rocks as a proof forDoklady Academy of Sciences Akademy Nauk SSSR, (Russian), Vol. 321, pp. 189-193.Russia, Commonwealth of Independent States (CIS)Microdiamonds, Metamorphic rocks
DS1991-1622
1991
Sobolev, N.V.Sobolev, N.V.Specific features of diamonds associated with minerals from new Arkhangelsk Diamondiferous kimberlite province, USSRXiii International Gemmological Conference Held South Africa, Stellenbosch, 2p.abstractRussia, ArkangelskDiamond mineralogy, New Arkhangelsk
DS1991-1623
1991
Sobolev, N.V.Sobolev, N.V., Bakumenko, I.T., Yefimova, E.S., Pokhilenko, N.P.Morphological features of microdiamonds, sodium in garnet and potassium inpyroxenes content of two eclogite xenoliths from Udachnaya pipe(Yakutia).(Russian)Doklady Academy of Sciences Akademy Nauk SSSR, (Russian), Vol. 321, No. 3, pp. 585-592Russia, Commonwealth of Independent States (CIS), YakutiaMicrodiamonds, Udachanya pipe
DS1991-1624
1991
Sobolev, N.V.Sobolev, N.V., Bakumenko, I.T., Yefimova, E.S., Pokhilenko, N.P.Pecularities of microdiamond morphology, sodium content in garnets andDoklady Academy of Sciences Akademy Nauk SSSR, (Russian), Vol. 321, No. 3, pp. 585-592. #hh968RussiaMicro-diamonds, Geochemistry
DS1991-1625
1991
Sobolev, N.V.Sobolev, N.V., Shatskiy, V.S., Vavilov, M.A., Goryainov, S.V.Coesite inclusion in zircon from diamond containing gneisses of KokchetavMassif- lst find of coesite in metamorphic rocks of the USSR. (Russian)Doklady Academy of Sciences Akademy Nauk SSSR, (Russian), Vol. 321, No. 1, pp. 184-188. # hb124RussiaCoesite, Metamorphic rocks
DS1991-1626
1991
Sobolev, N.V.Sobolev, N.V., Shvedenkov, G.Yu., Korolyuk, V.S., Yefimova, E.S.Nitrogen in chromites and olivines coexisting with diamondDoklady Academy of Science USSR, Earth Science Section, Vol. 309, No. 1-6, July pp. 193-195RussiaNatural diamond, Nitrogen
DS1991-1627
1991
Sobolev, N.V.Sobolev, N.V., Zuev, V.M., Bezborodov, S.M., Ponomarenko, A.I.Eclogite paragenesis of diamonds from Udachnaya and Mir pipes, YakutiaProceedings of Fifth International Kimberlite Conference held Araxa June 1991, Servico Geologico do Brasil (CPRM) Special, p. 391RussiaXenoliths, Omphacites
DS1991-1784
1991
Sobolev, N.V.Vavilov, M.A., Sobolev, N.V., Shatskii, V.S.Micas from diamond bearing metamorphic rocks of northern Kazakhstan.(Russian)Doklady Academy of Sciences Akademy Nauk SSSR, (Russian), Vol. 319, No. 2, pp. 466-470Russia, KazakhstanMetamorphic rocks, Diamonds
DS1992-0485
1992
Sobolev, N.V.Fraracci, K.N., Taylor, L.A., Sobolev, N.V., Sobolev, V.N.Mineral chemistry of Diamondiferous eclogite xenoliths from the Mirkimberlite of the Yakutian kimberlite province, SiberiaGeological Society of America (GSA) Abstracts with programs, 1992 Annual, Vol. 24, No. 7, abstract p. A260Russia, Yakutia, SiberiaEclogites, Diamonds
DS1992-0618
1992
Sobolev, N.V.Griffin, W.L., Ryan, C.G., Gurney, J.J., Sobolev, N.V.Comparative geochemical evolution of the Australian, southern Africa and Siberian cratonic lithosphere11th. Australian Geol. Convention Held Ballarat University College, Jan., AbstractAustralia, South Africa, RussiaCraton, Geochemistry
DS1992-0619
1992
Sobolev, N.V.Griffin, W.L., Ryan, C.G., Gurney, J.J., Sobolev, N.V.Comparative geochemical evolution of the southern African, Siberian and Australian cratonic lithosphereProceedings of the 29th International Geological Congress. Held Japan August 1992, Vol. 1, abstract p. 175South Africa, Russia, AustraliaGeochronology, Craton
DS1992-0786
1992
Sobolev, N.V.Jerde, E.A., Taylor, L.A., Crozaz, G., Sobolev, N.V., Sobolev, V.N.Diamondiferous eclogites from Yakutia Siberia: rare earth element evidence for a range of crustal protolithsGeological Society of America (GSA) Abstracts with programs, 1992 Annual, Vol. 24, No. 7, abstract p. A260Russia, YakutiaEclogites, Diamonds
DS1992-0787
1992
Sobolev, N.V.Jerde, E.A., Taylor, L.A., Sobolev, N.V., Crozaz, C.Diamondiferous eclogites from Yakutia, Siberia: comparison with Kaapvaal craton and rare earth element evidence for source region variabilityProceedings of the 29th International Geological Congress. Held Japan August 1992, Vol. 1, abstract p. 179Russia, Yakutia, southern AfricaEclogites, rare earth elements (REE).
DS1992-1445
1992
Sobolev, N.V.Sobolev, N.V., et al.Inclusion of diamonds, coesite and coexisting minerals in zircons and garnets from metamorphic rocks of Kochetav Massif, Northern Kazakstan, USSRProceedings of the 29th International Geological Congress. Held Japan August 1992, Vol. 2, abstract p. 599Russia, KazakhstanDiamond inclusions, Metamorphic rocks
DS1992-1446
1992
Sobolev, N.V.Sobolev, N.V., Afanasev, V.P., Pokhilenko, N.P., Kaminsky, F.V.Pyropes and diamonds of the Algerian Sahara.(Russian)Doklady Academy of Sciences Akademy Nauk SSSR, (Russian), Vol. 325, No. 2, pp. 367-373.AlgeriaIndicator minerals, Pyropes, diamonds
DS1992-1447
1992
Sobolev, N.V.Sobolev, N.V., Hassan Abu-Assak, V.V., et al.Lamprophyres of Cretaceous diatremes of the Syrian RiftDoklady Academy of Sciences USSR, Earth Science Section, Vol. 314, No. 1-6, July 1992, pp. 129-132.SyriaLamprophyres, Diatremes
DS1992-1448
1992
Sobolev, N.V.Sobolev, N.V., Mankenda, S.A., Kaminsky, F.V., Sobolev, V.N.Garnets from kimberlites of northeastern Angola and correlations between their compositions and diamond content.Doklady Academy of Sciences USSR, Earth Science Section, Vol. 315, pp. 238-242.AngolaGarnet mineralogy, Diamond content
DS1992-1449
1992
Sobolev, N.V.Sobolev, N.V., Pokhilenko, N.P., Grib, V.P., Skripnichenko, V.A.Specific composition and conditions of formation of deep seated mineralsRussian Geology and Geophysics, Vol. 33, No. 10, pp. 71-78.Russia, Commonwealth of Independent States (CIS), Arkangelsk, RussiaZolotisa Field, Tectonics, Explosion pipes, Kimberlites
DS1992-1450
1992
Sobolev, N.V.Sobolev, N.V., Sinitsyn, A.V., Kushev, V.G.Structural metallogeny of Diamondiferous kimberlitesRussian Geology and Geophysics, Vol. 33, No. 10, pp. 1-3.Russia, Commonwealth of Independent States (CIS), ArkangelskStructure, Metallogeny
DS1993-0398
1993
Sobolev, N.V.Eggler, D.H., Harris, J.W., Sobolev, N.V.Oxidation state of eclogitic diamond sulfide inclusionsGeological Society of America Annual Abstract Volume, Vol. 25, No. 6, p. A99 abstract onlySouthern AfricaEclogite, Diamond inclusions
DS1993-0585
1993
Sobolev, N.V.Griffin, W.L., Sobolev, N.V., Ryan, C.G., Pokhilenko, N.P., WinTrace elements in garnets and chromites: diamond formation in the SiberianlithosphereLithos, Vol. 29, pp. 235-256Russia, Commonwealth of Independent States (CIS), Siberia, YakutiaGeochemistry, Diamond genesis
DS1993-0729
1993
Sobolev, N.V.Jacob, D.E., Jagoutz, E., Sobolev, N.V.Isotopic systematics of subcalcic garnets from SiberiaEos, Transactions, American Geophysical Union, Vol. 74, No. 16, April 20, supplement abstract p. 320Russia, SiberiaGeochemistry -garnets, Geochronology
DS1993-0749
1993
Sobolev, N.V.Jerde, E.A., Taylor, L.A., Crozaz, G., Sobolev, N.V.Exsolution of garnet within clinopyroxene of mantle eclogites - major element and trace-element chemistryContribution to Mineralogy and Petrology, Vol. 114, No. 2, June pp. 148-159MantleEclogites, Geochemistry
DS1993-0750
1993
Sobolev, N.V.Jerde, E.A., Taylor, L.A., Crozaz, G., Sobolev, N.V., Sobolev, V.N.Diamondiferous eclogites from Yakutia, Siberia: evidence for a diversity ofprotolithsContribution to Mineralogy and Petrology, Vol. 114, No. 2, June pp. 189-202GlobalEclogites, Udachnaya pipe, chemistry, geobarometry
DS1993-0767
1993
Sobolev, N.V.Kadik, A.A., Zharkova, E.V., Efimova, E.S., Sobolev, N.V.Electrochemical determination of intrinsic oxygen fugacity of diamondcrystals. (Russian)Doklady Academy of Sciences Akademy Nauk SSSR, (Russian), Vol. 328, No. 3, January pp. 386-389Russia, Commonwealth of Independent States (CIS), YakutiaDiamond morphology
DS1993-0879
1993
Sobolev, N.V.Langer, K., Robarick, E., Sobolev, N.V., Shatsky, V.S.Single crystal spectra of garnets from Diamondiferous high pressure metamorphic rocks from Kazakhstan -indications for OH-,H2O, and FeTi chargetransfer.European Journal of Mineralogy, Vol. 5, No. 6, Nov-Dec pp. 1091-1100.Russia, KazakhstanMetamorphic rocks, Mineralogy -garnets
DS1993-1442
1993
Sobolev, N.V.Shatsky, V.S., Jagoutz, E., Kozmenko, O.A., Blinchik, T.M., Sobolev, N.V.Age and genesis of eclogites from the Kokchetav massif (northernKazakhstan).Russian Geology and Geophysics, Vol. 34, No. 12, pp. 40-50.Russia, KazakhstanGeochronology, Eclogites
DS1993-1443
1993
Sobolev, N.V.Shatsky, V.S., Sobolev, N.V.Some specific features of the origin of diamonds in metamorphicrocks.(Russian)Doklady Academy of Sciences Akad. Nauk, (Russian), Vol. 331, No. 2, July pp. 217-218.RussiaDiamond, Metamorphic rocks
DS1993-1494
1993
Sobolev, N.V.Snyder, G.A., Jerde, E.A., Taylor, L.A., Sobolev, N.V.Earliest differentiation of the earth's mantle: evidence from the isotopic studies of Diamondiferous eclogites, Yakutia, Siberia, Russia.Geological Society of America Annual Abstract Volume, Vol. 25, No. 6, p. A73 abstract onlyRussia, Yakutia, RussiaGeochronology, Eclogites
DS1993-1498
1993
Sobolev, N.V.Sobolev, N.V., Galimov, E.M., Efimova, E.S., Sobolev, E.V.Crystalline inclusions, isotopes carbon, nitrogen centers in diamonds, features of garnet from Madjgawan.Russian Geology and Geophysics, Vol. 34, No. 12, pp. 77-83.IndiaDiamond inclusions, Deposit -Madjgawan
DS1993-1499
1993
Sobolev, N.V.Sobolev, N.V., Pokhilenko, N.P., Afanasev, V.P.Kimberlite pyropes and chromites morphology and chemistry as indicators of diamond grade in Yakutian and Arkangelsk Provinces.Mid-continent diamonds Geological Association of Canada (GAC)-Mineralogical Association of Canada (MAC) Symposium ABSTRACT volume, held Edmonton May, pp. 63-70.Russia, Commonwealth of Independent States (CIS), YakutiaMineral chemistry, Diamond morphology
DS1993-1500
1993
Sobolev, N.V.Sobolev, N.V., Shimizu, N.Trace element variations in diamond inclusion garnets from Siberian kimberlite pipes.American Geophysical Union, EOS, supplement Abstract Volume, October, Vol. 74, No. 43, October 26, abstract p. 637.Russia, SiberiaDiamond inclusions, Deposit -Siberian ones
DS1993-1653
1993
Sobolev, N.V.Vavilov, M.A., Sobolev, N.V., Shatskiy, V.S.Micas in diamond bearing metamorphic rocks of northern KazakhstanDoklady Academy of Sciences USSR, Earth Science Section, Vol. 319A, No. 6, Publishing July 1993, pp. 177-182.Russia, KazakhstanMetamorphic rocks
DS1994-0012
1994
Sobolev, N.V.Afanasev, V.P., Sobolev, N.V., Kirillov, E.A., Yusupov, I.S.Relative abrasive stability of pyrope and pyroilmenite -indicator minerals of kimberlite.(Russian)Doklady Academy of Sciences Nauk, Vol. 337, No. 3, July pp. 359-362.Russia, SiberiaMineralogy, Indicator minerals
DS1994-0299
1994
Sobolev, N.V.Chepurov, A.I., Fedorov, A.I., Sonin, V.M., Sobolev, N.V.Diamond formation in the system (iron, nickel) S-C H at high pressure/temperature parameters. (Russian)Doklady Academy of Sciences Nauk. SSSR, (Russian), Vol. 336, No. 2, May pp. 238-240. # NR556RussiaDiamond genesis, Iron, nickel
DS1994-0666
1994
Sobolev, N.V.Griffin, W.L., Ryan, C.G., Gurney, J.J., Sobolev, N.V., Win, T.T.Chromite macrocrysts in kimberlites and lamproites: geochemistry andorigin. #2Proceedings of Fifth International Kimberlite Conference, Vol. 1, pp. 366-377.AustraliaChromite, Geochemistry
DS1994-0991
1994
Sobolev, N.V.Lawrence, Qu, Qi, Taylor, A., Sobolev, N.V.Eclogites from the Obnazhennaya kimberlite pipe, Yakutia, RussiaInternational Geology Review, Vol. 36, No. 10, Oct. 1, pp. 911-924.RussiaEclogites, petrology, Deposit - Obnazhennaya
DS1994-1589
1994
Sobolev, N.V.Shigley, J.E., Fritsch, E., Koivula, J.I., Sobolev, N.V.The gemological properties of Russian gem quality synthetic yellowdiamonds.Gems and Gemology, Vol. 29, Winter, pp. 228-248.RussiaSynthetic diamonds, Colour -yellow
DS1994-1591
1994
Sobolev, N.V.Shimizu, N., Boyd, F.R., Sobolev, N.V., Pokhilenko, N.P.Chemical zoning of garnets in peridotites and diamondsMineralogical Magazine, Vol. 58A, pp. 831-832. AbstractSouth Africa, Russia, YakutiaGeochemistry, mineral inclusions, Diamond inclusions
DS1994-1653
1994
Sobolev, N.V.Sobolev, N.V.Diamondiferous eclogites from the Siberian platform: samples with peridotite signatures. #1Eos, Vol. 75, No. 16, April 19, p. 192.RussiaEclogites, Peridotites
DS1994-1654
1994
Sobolev, N.V.Sobolev, N.V., Afanasyev, V.P., Pokhilenko, N., Kaminsky, F.Pyropes and diamonds from the Algerian SaharaDoklady Academy of Sciences USSR, Vol. 326, Oct. pp. 151-157.AlgeriaAlluvials, Geochemistry -garnets
DS1994-1655
1994
Sobolev, N.V.Sobolev, N.V., Bakumento, L.T., et al.Morphology of microscopic diamonds containing traces of sodium in garnet sand of potassium in pyroxenes.Doklady Academy of Sciences USSR, Earth Science Section, Vol. 322, No. 1, pp. 138-146.RussiaDiamond morphology, eclogite xenoliths, Deposit -Udachnaya
DS1994-1656
1994
Sobolev, N.V.Sobolev, N.V., Shatskiy, V.S., Vavilov, MM.A., GoryainoZirconium from metamorphic rocks of folded regions a unique container of inclusions diamond, coesite (Russian)Doklady Academy of Sciences Nauk.(Russian), Vol. 334, No. 4, Feb. pp. 488-492.RussiaMetamorphic rocks, Coesite
DS1994-1657
1994
Sobolev, N.V.Sobolev, N.V., Shatsky, V.S., Vavilov, M.A., Goryaynov, S.A coesite inclusion in zircon from diamond containing gneiss of Kokchetav:first find coesite in metamorphic rocks of the USSRDoklady Academy of Sciences USSR, Earth Science Section, Vol. 322, No. 1, pp. 123-127.RussiaDiamond inclusions, Coesite
DS1994-1658
1994
Sobolev, N.V.Sobolev, V.N., Taylor, L.A., Snyder, G.A., Sobolev, N.V.Diamondiferous eclogites from the Udachnaya kimberlite pipe, YakutiaInternational Geology Review, Vol. 36, No. 1, Jan. pp. 42-64.Russia, YakutiaEclogites, Deposit -Udachnaya
DS1995-0192
1995
Sobolev, N.V.Boyd, F.R., Pokhilenko, N.P., Pearson, D.G., Sobolev, N.V.Peridotite xenoliths from the Udachnaya kimberlite pipeProceedings of the Sixth International Kimberlite Conference Extended Abstracts, p. 57-59.Russia, YakutiaXenoliths, Deposit -Udachnaya
DS1995-0314
1995
Sobolev, N.V.Chopin, C., Sobolev, N.V.Principal mineralogic indicators of ultra high pressure (UHP) in crustal rocksCambridge University of Press, pp. 96-131.GlobalGarnet, clinopyroxene, microdiamonds, Crustal rocks
DS1995-0424
1995
Sobolev, N.V.Dobretsov, N.I., Shatsky, V.S., Sobolev, N.V.Comparison of the Kokchetav and Dabie Shan metamorphic complexes: coesite and diamond bearing rocks ultra high pressure (UHP)-HP...International Geology Review, Vol. 37, pp. 636-656.ChinaCoesite, metamorphism, Deposit -Kokchetav, Dabie Shan
DS1995-0862
1995
Sobolev, N.V.Jacob, D.E., Jagoutz, E., Sobolev, N.V., Sorowka, A.Isotopic analysis ( Samarium/neodymium, Rubidium-Strontium and Uranium/lead) of single subcalcic garnet grains from Yakutian kimberlites.Proceedings of the Sixth International Kimberlite Conference Abstracts, pp. 257-259.Russia, YakutiaGeochemistry, isotopes, Geochronology -garnets
DS1995-1104
1995
Sobolev, N.V.Logvinova, A.M., Sobolev, N.V.Morphology and composition of mineral inclusions in chromite macrocrysts from kimberlites and lamproites.Proceedings of the Sixth International Kimberlite Conference Abstracts, pp. 331-332.Russia, Yakutia, South Africa, Australia, United StatesMorphology -Mineral inclusions, Kimberlites, lamproites
DS1995-1507
1995
Sobolev, N.V.Pokhilenko, N.P., Sobolev, N.V.Mineralogical mapping of the southeast section of the Yakutian kimberlite province and its main results.Proceedings of the Sixth International Kimberlite Conference Abstracts, pp. 446-448.Russia, YakutiaMineralogy, Deposit -Olenek River Basin area
DS1995-1720
1995
Sobolev, N.V.Shatsky, V.S., Sobolev, N.V., Jagoutz, E., Vavilov, M.A.Ultrahigh pressure metamorphic environment of microdiamondsProceedings of the Sixth International Kimberlite Conference Abstracts, pp. 512-514.Russia, KazakhstanMetamorphic, Deposit -Kokchetav Massif
DS1995-1721
1995
Sobolev, N.V.Shatsky, V.S., Sobolev, N.V., Vavilov, M.A.Diamond bearing metamorphic rocks of the Kokchetav Massif, NorthernKazakhstan.Cambridge University of Press, pp. 427-455.Russia, KazakhstanMetamorphic rocks, Diamond - Kokchetav Massif
DS1995-1737
1995
Sobolev, N.V.Shimizu, N., Sobolev, N.V.Young peridotitic diamonds from the Mir kimberlite pipeNature, Vol. 375, No. 6530, June 1, pp. 394-396.RussiaDiamond morphology, Deposit -Mir
DS1995-1738
1995
Sobolev, N.V.Shimizu, N., Sobolev, N.V., Yefimova, E.S.Chemical heterogeneities of peridotitic inclusion garnets and juvenility ofdiamonds.Proceedings of the Sixth International Kimberlite Conference Abstracts, pp. 526-528.Russia, YakutiaGeochemistry, Deposit -Mir, Udachnaya, Aikhal
DS1995-1772
1995
Sobolev, N.V.Smirnov, G.I., Chashka, A.I., Sobolev, N.V., TarasyukTypomorphic features of high baric minerals from kimberlites of theUkraine.Proceedings of the Sixth International Kimberlite Conference Abstracts, pp. 541-542.UKraineXenoliths, Deposit -Azov
DS1995-1790
1995
Sobolev, N.V.Snyder, G.A., Taylor, L.A., Beard, B.L., Sobolev, N.V.Siberian eclogite xenoliths: keys to differentiation of the Archeanmantle.Proceedings of the Sixth International Kimberlite Conference Abstracts, pp. 549-551.Russia, YakutiaEclogite xenoliths, Deposit -Udachnaya. Mir
DS1995-1793
1995
Sobolev, N.V.Sobolev, N.V., Shatskiy, V.S., Vavilov, GoryaynovZircon in high pressure metamorphic rocks in folded regions as a unique container of inclusions.....Doklady Academy of Sciences, Vol. 336, No. 4, Nov., pp. 79-85.Russia, Kokchetau MassifCoesite, diamond, Inclusions
DS1995-1794
1995
Sobolev, N.V.Sobolev, N.V., Yefimova, E., Reimers, Zakharchenko, MakhinArkhangelsk diamond inclusionsProceedings of the Sixth International Kimberlite Conference Abstracts, pp. 558-560.Russia, ArkangelskDiamond inclusions, Deposit -Lomonosov, Pionerskaya, Karpinski, Pomorskaya
DS1995-1797
1995
Sobolev, N.V.Sobolev, V.N., Taylor, L.A., Snyder, G.A., Sobolev, N.V.Diamondiferous eclogites from the Siberian Platform: samples with peridotitic signature? #2Proceedings of the Sixth International Kimberlite Conference Abstracts, pp. 552-554.Russia, SiberiaEclogites, Peridotites
DS1996-0101
1996
Sobolev, N.V.Beard, B.L., Fracacci, K.N., Sobolev, N.V.Petrography and geochemistry of eclogites from the Mir kimberlite, Russia.Contributions to Mineralogy and Petrology, Vol. 125, No. 4, pp. 293-310.Russia, YakutiaGeochemistry, Deposit - Mir
DS1996-0267
1996
Sobolev, N.V.Chepurov, A.I., Fedorov, I.I., Sonin, V.M., Sobolev, N.V.Diamond formation in the system (iron, nickel)-S-C-H at high pressures andtemperatures.Doklady Academy of Sciences, Vol. 338, No. 7, Jan. pp. 61-65.GlobalPetrology -experimental, Diamond genesis
DS1996-1294
1996
Sobolev, N.V.Shatskiy, V.S., Sobolev, N.V.Some aspects of the origin of diamonds in metamorphic rocksDoklady Academy of Sciences, Vol. 336, pp. 67-70.Russia, Kokchetau MassifZewrenda series, Metamorphic rocks
DS1996-1403
1996
Sobolev, N.V.Taylor, L.A., Snyder, G.A., Sobolev, N.V.Eclogitic inclusions in diamonds: evidence of complex mantle processes overtime.Earth and Planetary Science Letters, Vol. 142, No. 3/4, Aug. 1, pp. 535-552.RussiaEcologites, Diamond inclusions
DS1996-1604
1996
Sobolev, N.V.Zharkova, E.V., Kadik, A.A., Sobolev, N.V.Olivine from diamonds -bearing peridotite xenoliths: redox conditions of their formation (Udachnaya pipe).International Geological Congress 30th Session Beijing, Abstracts, Vol. 2, p. 391.RussiaIGF -olivines, Deposit -Udachnaya
DS1997-1038
1997
Sobolev, N.V.Shimizu, N., Sobolev, N.V., Yefimova, E.S.Chemical heterogeneities of garnets and juvenile character of peridotitic diamonds from Siberia.Russian Geology and Geophysics, Vol. 38, No. 2, pp. 356-372.Russia, SiberiaGeochemistry, Diamond inclusions, garnet zoning
DS1997-1072
1997
Sobolev, N.V.Snyder, G.A., Taylor, L.A., Sobolev, N.V.The origins of Yakutian eclogite xenolithsJournal of Petrology, Vol. 38, No. 1, Jan. 1, pp. 85-114.Russia, YakutiaEclogite, Xenolith
DS1997-1073
1997
Sobolev, N.V.Sobolev, N.V., Kaminsky, F.V., Botkunova, A.I., Griffin, W.L., YefimovaMineral inclusions in diamonds from the Sputnik kimberlite pipe, YakutiaLithos, Vol. 39, No. 3-4, Feb. 1, pp. 135-158.Russia, YakutiaMineral chemistry, Diamond inclusions, mineralogy, Deposit - Sputnik
DS1997-1074
1997
Sobolev, N.V.Sobolev, N.V., Yefimova, Reimers, Zakharchenko, MakhinMineral inclusions in diamonds of the Arkangelsk kimberlite provinceRussian Geology and Geophysics, Vol. 38, No. 2, pp. 379-393.RussiaDiamond inclusions, Deposit - Zolotitsky, Lomonosov, Karpinsky, Pionerskaya
DS1998-0029
1998
Sobolev, N.V.Andre, L., Shatsky, V.S., De Corte, K., Sobolev, N.V.Potassium rich clinopyroxenes as mantle conveyers of crustal derived components.7th International Kimberlite Conference Abstract, pp. 17-19.Australia, RussiaMicroanalyses - omphacite, clinopyroxene, Deposit - Argyle, Kochetav Massif
DS1998-0082
1998
Sobolev, N.V.Barron, K.M., Logvinova, A.M., Sobolev, N.V.Morphology and composition of chromite macrocrysts and their inclusions Guaniamo kimberlite field, Venezuela.7th International Kimberlite Conference Abstract, pp. 43-45.Venezuela, BolivarChromites, Deposit - Guaniamo
DS1998-0674
1998
Sobolev, N.V.Jacob, D.E., Jagoutz, E., Sobolev, N.V.Neodynium and strontium isotopic measurements on single subcalcic garnet grains from Yakutian kimberlites.Neues Jahrbuch fnr Mineralogie Abh., No. 172, pp. 357-379.Russia, YakutiaGeochronology
DS1998-0791
1998
Sobolev, N.V.Korsakov, A.V., Shatsky, V.S., Sobolev, N.V.The first finding of coesite in the eclogites of the Kokchetav MassifDoklady Academy of Sciences, Vol. 360, No. 4, pp. 469-73.RussiaEclogites, Coesite
DS1998-0891
1998
Sobolev, N.V.Logvinova, A.M., Federova, E.N., Sobolev, N.V.Microdiamonds from the Yubileinaya kimberlite pipe, Yakutia: morphology, physical properties, inclusions..7th International Kimberlite Conference Abstract, pp. 512-14.Russia, YakutiaDiamond morphology, mineral inclusions, Deposit - Yubileynaya
DS1998-1175
1998
Sobolev, N.V.Pokhilenko, N.P., Sobolev, N.V., Kuligin, ShimizuPeculiarities of pyroxenite paragenesis garnets distribution in Yakutian kimberlites .. craton mantle7th. Kimberlite Conference abstract, pp. 702-4.Russia, Siberia, YakutiaCraton - lithospheric mantle evolution, Magmatism
DS1998-1342
1998
Sobolev, N.V.Shimizu, N., Sobolev, N.V., Yefimova, E.S.Trace element heterogeneities of in situ diamond inclusion garnets fromSiberia.7th International Kimberlite Conference Abstract, p. 807.Russia, SiberiaDiamond inclusions
DS1998-1344
1998
Sobolev, N.V.Shiryaev, A.A., Galimov, E.M., Sobolev, N.V., KolesovTrace elements in inclusion free diamonds from Venezuela and Arkhangelskdeposits.7th International Kimberlite Conference Abstract, pp. 811-13.Russia, Kola, VenezuelaDiamond formation, genesis, Mineral inclusions
DS1998-1370
1998
Sobolev, N.V.Sobolev, N.V., Efimova, E.S.Compositional variations of chromite inclusions as an indicator of the zonation of diamond crystals.Doklady Academy of Sciences, Vol. 359, No. 2, pp. 163-166.GlobalDiamond inclusions, Chromite
DS1998-1371
1998
Sobolev, N.V.Sobolev, N.V., Snyder, G.A., et al.Extreme chemical diversity in the mantle during eclogitic diamondformation: evidence from inclusions..International Geology Review, Vol. 40, No. 7, pp. 567-578.Russia, YakutiaDiamond inclusions, mineral chemistry, Deposit - Mir
DS1998-1372
1998
Sobolev, N.V.Sobolev, N.V., Yefimova, Channer, Anderson, BarronUnusual upper mantle beneath Guaniamo, Guyana Shield, Venezuela: evidence from diamond inclusions.Geology, Vol. 26, No. 11, Nov. pp. 971-974.VenezuelaEcogitic, peridotitic, ultrmafic type, Roraima Group
DS1998-1373
1998
Sobolev, N.V.Sobolev, N.V., Yefimova, E.S., Channer, D., AndersonA unique eclogitic source of Guaniamo diamonds, Guyana Shield, Venezuela7th International Kimberlite Conference Abstract, pp. 829-31.Venezuela, GuyanaEclogites, Diamond genesis
DS1998-1374
1998
Sobolev, N.V.Sobolev, N.V., Yefimova, E.S., Koptil, V.I.Crystalline inclusions in diamonds in the northeast of the Yakutian diamondiferous province.7th International Kimberlite Conference Abstract, pp. 832-4.Russia, YakutiaDiamond inclusions, Deposit - Dianga
DS1999-0561
1999
Sobolev, N.V.Pokhilenko, N.P., Sobolev, N.V., Kuligin, S.S., ShimizuPeculiarities of distribution of pyroxenite paragenesis garnets in Yakutian kimberlites and some aspects of...7th International Kimberlite Conference Nixon, Vol. 2, pp. 689-98.Russia, Yakutia, KharamaiCraton - evolution of Siberian craton, petrography, Udachnaya, Obnazhennaya
DS1999-0692
1999
Sobolev, N.V.Sobolev, N.V., Sobolev, V.N., Taylor, L.A.Significance of eclogitic and related parageneses of natural diamonds #1International Geology Review, Vol. 41, No. 2, Feb. pp. 129-40.Russia, YakutiaDiamond morphology, Eclogites, genesis
DS1999-0693
1999
Sobolev, N.V.Sobolev, N.V., Yefimova, E.S., Koptil, V.I.Mineral inclusions in diamonds in the northeast of the Yakutian Diamondiferous province.7th International Kimberlite Conference Nixon, Vol. 2, pp. 816-22.Russia, Siberia, YakutiaDiamond - inclusions, Deposit - Olenek, Anabar, Lena, Ebelyakh, Dianga
DS1999-0694
1999
Sobolev, N.V.Sobolev, V.N., Taylor, L.A., Sobolev, N.V.Quantifying the effects of metasomatism in mantle xenoliths: constraints from secondary chemistry ...International Geology Review, Vol. 41, No. 5, pp. 391-416.Russia, YakutiaMIneralogy, Geochemistry, eclogites, Deposit - Udachnaya
DS2000-0771
2000
Sobolev, N.V.Pokhilenko, N.P., Sobolev, N.V., Chernyi, S.D., YanginPyropes and chromites from kimberlites in the Nakyn Field, and Snipe Lake (Slave River region) Evidence...Doklady Academy of Sciences, Vol. 372, No. 4, May-June pp. 638-42.Northwest Territories, Russia, YakutiaLithosphere - structure, Deposit - Nakyn, Snipe Lake
DS2000-0816
2000
Sobolev, N.V.Reutskii, V.N., Efimova, E.S., Sobolev, N.V.Isotopic composition of carbon in polycrystalline aggregates of diamond with inclusions of garnet/rutileRussian Geology and Geophysics, Vol.41,12,pp.1690-6., Vol.41,12,pp.1690-6.Russia, YakutiaDiamond inclusions, Deposit - Mir
DS2000-0817
2000
Sobolev, N.V.Reutskii, V.N., Efimova, E.S., Sobolev, N.V.Isotopic composition of carbon in polycrystalline aggregates of diamond with inclusions of garnet/rutileRussian Geology and Geophysics, Vol.41,12,pp.1690-6., Vol.41,12,pp.1690-6.Russia, YakutiaDiamond inclusions, Deposit - Mir
DS2000-0907
2000
Sobolev, N.V.Sobolev, N.V., Logvinova, A.M., et al.Anomously high nickel admixture in olivine inclusions from microdiamonds, the Juileinaya kimberlite pipe, YakutiaDoklady Academy of Sciences, Vol. 375A, No. 9, pp. 1403-6.Russia, Siberia, YakutiaMicrodiamonds, Deposit - Yubileinaya
DS2000-0908
2000
Sobolev, N.V.Sobolev, N.V., Sobolev, V.N., Snyder, Yefimova, TaylorSignificance of eclogitic and related parageneses of natural diamonds #2Snyder, Neal, Ernst, Plan. Petrology and Geochemistry, pp. 15-26.GlobalDiamond - morphology, Diamond - genesis
DS2000-0909
2000
Sobolev, N.V.Sobolev, N.V., Yefimova, E.S.Composition and petrogenesis of Ti oxides associated with diamondsInternational Geology Review, Vol. 42, No. 8, pp. 758-RussiaDiamond - inclusions, Petrology
DS2001-0350
2001
Sobolev, N.V.Fursenko, B.A., Goryainov, S.V., Sobolev, N.V.high pressure coesite inclusions in diamond: Raman spectroscopyDoklady Academy of Sciences, Vol. 379A, No. 6, July-August pp. 749-51.GlobalCoesite, Diamond - inclusions
DS2001-0599
2001
Sobolev, N.V.Khokhryakov, A.F., Palyanov, Y.N., Sobolev, N.V.Evolution of crystal morphology of natural diamond in dissolution processes: experimental data.Doklady Academy of Sciences, Vol. 381, No. 8, Oct/Nov. pp. 884-88.GlobalDiamond - morphology
DS2001-0600
2001
Sobolev, N.V.Khokhryakov, A.P., Palyanov, Y.N., Sobolev, N.V.Evolution of crustal morphology of natural diamond in dissolution processes: experimental data.Doklady, Vol. 381, No. 8, pp. 884-88.GlobalDiamond - morphology
DS2001-0936
2001
Sobolev, N.V.Pokhilenko, N.P., Sobolev, N.V., McDonald, Hall et alCrystalline inclusions in diamonds from kimberlites of the Snap lake: new evidence anomalous lithosphericDoklady Academy of Sciences, Vol. 380, No. 7, Sept-Oct. pp.806-12.Northwest TerritoriesDiamond - inclusions, Deposit - Snap lake
DS2001-1096
2001
Sobolev, N.V.Sobolev, N.V., Efimova, E.S., Loginova, SukhodolskayaAbundance and composition of mineral inclusions in large diamonds from Yakutia.Doklady Academy of Sciences, Vol. 376, No. 1, Jan-Feb. pp. 34-8.Russia, YakutiaDiamond - inclusions
DS2001-1097
2001
Sobolev, N.V.Sobolev, N.V., Schertl, H.P., Burchard, M., Shatsky, V.An unusual pyrope grossular garnet and its paragenesis from Diamondiferous carbonate silicate rocks KokchetavDoklady Academy of Sciences, Vol. 380, No. 7, Sept-Oct. pp.791-4.Russia, KazakhstanMineralogy - pyrope, Deposit - Kokchetav Massif
DS2002-0841
2002
Sobolev, N.V.Khikhryakov, A.F., Palyanov, Y.N., Sobolev, N.V.Crystal morphology as an indicator of redox conditions of natural diamond dissolution at the mantle Pt parameters.Doklady, Vol.385,June-July, pp. 534-7.MantleDiamond - mineralogy
DS2002-0891
2002
Sobolev, N.V.Korsakov, A.V., Shatsky, V.S., Sobolev, N.V., Zayachokovosky, A.A.Garnet biotite clinozoisite gneiss: a new type of Diamondiferous metamorphic rock from the Kokchetav Massif.European Journal of Mineralogy, Vol. 14, 5, pp. 915-28.RussiaDiamond genesis
DS2002-1207
2002
Sobolev, N.V.Palyanov, Y.N., Sokol, A.G., Borzdov, Y.M., Khokhryakov, A.F., Sobolev, N.V.Diamond formation through carbonate silicate interactionAmerican Mineralogist, Vol. 87, pp. 1009-13.GlobalDiamond - crystallography, genesis, carbon, magnesite, Petrology - experimental
DS2002-1328
2002
Sobolev, N.V.Reutskii, V.N., Pokhilenko, N.P., Hall, A.E., Sobolev, N.V.Polygenous character of diamonds from kimberlites of the Snap lake region ( SlaveDoklady Earth Sciences, Vol. 386, 7, Sept-Oct.pp. 791-4.Northwest TerritoriesDiamond - morphology, Deposit - Snap Lake
DS2002-1520
2002
Sobolev, N.V.Sobolev, N.V., Taylor, L.A.Determining the provenance of a diamond: chromite inclusions as a Russian signatureEos, American Geophysical Union, Spring Abstract Volume, Vol.83,19, 1p.Russia, YakutiaDiamond - inclusions
DS2003-0014
2003
Sobolev, N.V.Anand, M., Taylor, L.A., Carlson, R.C., Taylor, D-H., Sobolev, N.V.Diamond genesis revealed by x-ray tomography of Diamondiferous eclogites8ikc, Www.venuewest.com/8ikc/program.htm, Session 2, POSTER abstractRussia, Siberia, YakutiaEclogites and Diamonds
DS2003-0015
2003
Sobolev, N.V.Anand, M., Taylor, L.A., Misra, K.C., Carlson, W.D., Sobolev, N.V.Diamondiferous eclogite dissections: anomalous diamond genesis?8 Ikc Www.venuewest.com/8ikc/program.htm, Session 2, AbstractRussia, YakutiaEclogites, diamonds, Genesis
DS2003-0330
2003
Sobolev, N.V.Dencker, I., Nimis, P., Zanetti, A., Sobolev, N.V.Major and trace elements composition of Cr diopsides from the Zagadochnaya8ikc, Www.venuewest.com/8ikc/program.htm, Session 4, POSTER abstractRussia, YakutiaMantle geochemistry, Deposit - Zagadochnaya
DS2003-0480
2003
Sobolev, N.V.Golovin, A.V., Sharygin, V.V., Pokhilenko, N.P., Malkovets, V.G., Sobolev, N.V.Secondary melt inclusions in olivine from unaltered kimberlites of the Udachnaya8 Ikc Www.venuewest.com/8ikc/program.htm, Session 7, POSTER abstractRussia, YakutiaDeposit - Udachnaya
DS2003-0540
2003
Sobolev, N.V.Hamilton, M.A., Sobolev, N.V., Stern, R.A., Pearson, D.G.SHRIMP U Pb dating of a perovskite inclusion in diamond: evidence for a syneruption8ikc, Www.venuewest.com/8ikc/program.htm, Session 3, POSTER abstractRussia, Siberia, YakutiaDiamonds - inclusions, geochronology, Deposit - Sytykanskaya
DS2003-0725
2003
Sobolev, N.V.Klein Ben David, O., Logvinova, A.M., Izraeli, E.S., Sobolev, N.V., Navon, O.Sulfide melt inclusions in Yubileinaya ( Yakutia) diamonds8ikc, Www.venuewest.com/8ikc/program.htm, Session 3, POSTER abstractRussia, Siberia, YakutiaDiamonds - inclusions, Deposit - Yubileinaya
DS2003-0837
2003
Sobolev, N.V.Loginova, A.M., Klein-Ben David, O., Israeli, E.S., Navon, O., Sobolev, N.V.Micro inclusions in fibrous diamonds from Yubileinaya kimberlite pipe, Yakutia8ikc, Www.venuewest.com/8ikc/program.htm, Session 3, POSTER abstractRussia, YakutiaDiamonds - inclusions, Deposit - Yubileinaya
DS2003-0871
2003
Sobolev, N.V.Malygina, E.V., Pokhilenko, N.P., Sobolev, N.V.Coarse peridotite xenoliths of Udachnaya kimberlite pipe, Yakutia: garnetization of8 Ikc Www.venuewest.com/8ikc/program.htm, Session 6, POSTER abstractRussia, Siberia, YakutiaDeposit - Udachnaya
DS2003-0991
2003
Sobolev, N.V.Nadolinny, V.A., Shatsky, V.S., Sobolev, N.V., Twitchen, D.J., Yuryeva, O.P.Observation and interpretation of paramagnetic defects in Brazilian and Central AfricanAmerican Mineralogist, Vol.88, pp. 11-17.Brazil, Central African RepublicSpectroscopy - nitrogen
DS2003-1043
2003
Sobolev, N.V.Palyanov, Yu.N., Borzdov, Yu.M., Ovchinnikov, I.Yu., Sobolev, N.V.Experimental study of the interaction between pentlandite melt and carbon at mantle PtDoklady Earth Sciences, Vol. 392, Sept-Oct. pp. 1026-29.MantleCrystallography
DS2003-1090
2003
Sobolev, N.V.Pokhilenko, N.P., Agashev, A.M., McDonald, J.A., Sobolev, N.V., MityukhinKimberlites of the Nakyn field, Siberia and the Snap Lake King Lake dyke system8 Ikc Www.venuewest.com/8ikc/program.htm, Session 7, POSTER abstractNorthwest TerritoriesDeposit - Snap Lake, King Lake
DS2003-1093
2003
Sobolev, N.V.Pokhilenko, N.P., McDonald, J.A., Sobolev, N.V., Reutsky, V.N., Hall, A.E.Crystalline inclusions and C isotope composition of diamonds from the Snap lake/King8 Ikc Www.venuewest.com/8ikc/program.htm, Session 3, AbstractNorthwest TerritoriesDiamonds - geochronology, Deposit - Snap Lake
DS2003-1259
2003
Sobolev, N.V.Sharygin, V.V., Golovin, A.V., Pokhilenko, N.P., Sobolev, N.V.Djerfisherite in unaltered kimberlites of the Udachnaya East pipe, YakutiaDoklay Earth Sciences, Vol. 390, 4, May-June pp. 554-8.RussiaMineralogy, Deposit - Udachnaya
DS2003-1305
2003
Sobolev, N.V.Sobolev, N.V., Loginova, A.M., Yefimova, E.S., Zedgenizov, D.A., Channer, D.Polymineralic eclogite inclusions in Guaniamo diamonds, Venezuela: evidence for8ikc, Www.venuewest.com/8ikc/program.htm, Session 2, POSTER abstractVenezuelaEclogites and Diamonds, Deposit - Guaniamo
DS2003-1306
2003
Sobolev, N.V.Sobolev, N.V., Loginova, A.M., Zedgenizov, D.A., Yefimova, E.S., Taylor,L.A.Mineral inclusions in diamonds from the Komsomolskaya and Krasnopresnenskaya8ikc, Www.venuewest.com/8ikc/program.htm, Session 3, POSTER abstractRussia, SiberiaDiamonds - inclusions, Deposit - Komosomolskaya, Krasnopresnenskaya
DS2003-1307
2003
Sobolev, N.V.Sobolev, N.V., Logvinova, A.M., Zedgenizov, D.A., Yefimova, E.S.Mineral inclusions in microdiamonds and macrodiamonds from kimberlites of Yakutia: a8 Ikc Www.venuewest.com/8ikc/program.htm, Session 3, AbstractRussia, Yakutia, SiberiaDiamonds - inclusions
DS2003-1308
2003
Sobolev, N.V.Sobolev, N.V., Shatsky, V.S., Liou, J.G., Zhang, R.Y., Hwang, Shen, Chu, YuiAn origin of microdiamonds in metamorphic rocks of the Kokchetav Massif, northernEpisodes, Russia, KazakhstanBlank
DS2003-1364
2003
Sobolev, N.V.Taylor, L.A., Anand, M., Promprated, P., Floss, C., Sobolev, N.V.The significance of mineral inclusions in large diamonds from Yakutia, RussiaAmerican Mineralogist, Vol. 88, 5/6, pp. 912-928.Russia, YakutiaDiamond - inclusions, protogenetic, Deposit - Udachnaya, Mir, Aikhal
DS200412-0028
2003
Sobolev, N.V.Anand, M., Taylor, L.A., Misra, K.C., Carlson, W.D., Sobolev, N.V.Diamondiferous eclogite dissections: anomalous diamond genesis?8 IKC Program, Session 2, AbstractRussia, YakutiaEclogite, diamonds Genesis
DS200412-0029
2004
Sobolev, N.V.Anand, M., Taylor, L.A., Misra, K.C., Carlson, W.D., Sobolev, N.V.Nature of diamonds in Yakutian eclogites: views from eclogite tomography and mineral inclusions in diamonds.Lithos, Vol. 77, 1-4, Sept. pp. 333-348.Russia, YakutiaUdachnaya, diamond inclusions, eclogte, xenoliths
DS200412-0685
2003
Sobolev, N.V.Golovin, A.V., Sharygin, V.V., Pkhilenko, N.P., Malkovets, V.G., Kolesov, B.A., Sobolev, N.V.Secondary melt inclusions in olivine from unaltered kimberlites of the Udachnaya East pipe, Yakutia.Doklady Earth Sciences, Vol. 388, 1, pp. 93-96.Russia, YakutiaGeochemistry - mineral chemistry
DS200412-0686
2003
Sobolev, N.V.Golovin, A.V., Sharygin, V.V., Pokhilenko, N.P., Malkovets, V.G., Sobolev, N.V.Secondary melt inclusions in olivine from unaltered kimberlites of the Udachnaya eastern pipe, Yakutia.8 IKC Program, Session 7, POSTER abstractRussia, YakutiaKimberlite petrogenesis Deposit - Udachnaya
DS200412-1213
2003
Sobolev, N.V.Malygina, E.V., Pokhilenko, N.P., Sobolev, N.V.Coarse peridotite xenoliths of Udachnaya kimberlite pipe, Yakutia: garnetization of peridotites of the central Siberian platform8 IKC Program, Session 6, POSTER abstractRussia, Siberia, YakutiaMantle petrology Deposit - Udachnaya
DS200412-1335
2004
Sobolev, N.V.Misra, K.C., Anand, M., Taylor, L.A., Sobolev, N.V.Multi stage metasomatism of Diamondiferous eclogite xenoliths from the Udachnaya kimberlite pipe, Yakutia, Siberia.Contributions to Mineralogy and Petrology, Vol. 146, 6, pp. 696-714.Russia, Siberia, YakutiaDeposit - Udachnaya
DS200412-1492
2004
Sobolev, N.V.Palyanov, Yu.N., Borzdov, Y.M., Kupriyanov, I.N., Sobolev, N.V.Diamond and graphite crystallization from pentlandite melt at HPHT conditions.Lithos, ABSTRACTS only, Vol. 73, p. S82. abstractTechnologyDiamond nucleation
DS200412-1493
2003
Sobolev, N.V.Palyanov, Yu.N., Borzdov, Yu.M., Ovchinnikov, I.Yu., Sobolev, N.V.Experimental study of the interaction between pentlandite melt and carbon at mantle Pt parameters: condition of diamond and grapDoklady Earth Sciences, Vol. 392, Sept-Oct. pp. 1026-29.MantleCrystallography
DS200412-1494
2004
Sobolev, N.V.Palyanov, Yu.N.,Sokol, A.G., Tomilenko, A.A., Sobolev, N.V.Conditions of diamond formation under carbonate silicate interaction.Lithos, ABSTRACTS only, Vol. 73, p. S83. abstractTechnologyDiamond nucleation
DS200412-1561
2003
Sobolev, N.V.Pokhilenko, N.P., Agashev, A.M., McDonald, J.A., Sobolev, N.V., Mityukhin, S.I., Vavilov, M.A., Yanygin, Y.T.Kimberlites of the Nakyn field, Siberia and the Snap Lake King Lake dyke system, Slave Craton, Canada: a new variety of kimberli8 IKC Program, Session 7, POSTER abstractCanada, Northwest TerritoriesKimberlite petrogenesis Deposit - Snap Lake, King Lake
DS200412-1564
2003
Sobolev, N.V.Pokhilenko, N.P., McDonald, J.A., Sobolev, N.V., Reutsky, V.N., Hall, A.E., Logvinova, A.M., Reimers, L.F.Crystalline inclusions and C isotope composition of diamonds from the Snap lake/King Lake kimberlite dyke system: evidence for a8 IKC Program, Session 3, AbstractCanada, Northwest TerritoriesDiamonds - geochronology Deposit - Snap Lake
DS200412-1566
2004
Sobolev, N.V.Pokhilenko, N.P., Sobolev, N.V., Reutsky, V.N., Hall, A.E., Taylor, L.A.Crystalline inclusions and C isotope ratios in diamonds from the Snap Lake/King Lake kimberlite dyke system: evidence of ultradeLithos, Vol. 77, 1-4, Sept. pp. 57-67.Canada, Northwest TerritoriesDiamond inclusions, Carbon isotopes
DS200412-1592
2004
Sobolev, N.V.Promprated, P., Taylor, L.A., Anand, M., Floss, C., Sobolev, N.V., Pokhilenko, N.P.Multiple mineral inclusions in diamonds from the Snap Lake/King Lake kimberlite dike, Slave Craton: a trace element perspective.Lithos, Vol. 77, 1-4, Sept. pp. 69-81.Canada, Northwest TerritoriesDiamond inclusions, trace element, REE, in situ analysi
DS200412-1748
2004
Sobolev, N.V.Schertl, H.P., Neuser, R.D., Sobolev, N.V., Shatsky, V.S.UHP metamorphic rocks from Dora Maira Western Alps and Kokchetav Kazakhstan: new insights using cathodluminescence petrography.European Journal of Mineralogy, Vol. 16, 1, pp. 49-57.KazakhstanUHP
DS200412-1798
2003
Sobolev, N.V.Sharygin, V.V., Golovin, A.V., Pokhilenko, N.P., Sobolev, N.V.Djerfisherite in unaltered kimberlites of the Udachnaya East pipe, Yakutia.Doklady Earth Sciences, Vol. 390, 4, May-June pp. 554-8.RussiaMineralogy Deposit - Udachnaya
DS200412-1869
2004
Sobolev, N.V.Sobolev, N.V., Logvinova, A.M., Zedgenizov, D.A., Seryotkin, Y.V., Tefimova, E.S., Floss, C., Taylor, L.A.Mineral inclusions in microdiamonds and macrodiamonds from kimberlites of Yakutia: a comparative study.Lithos, Vol. 77, 1-4, Sept. pp. 225-242.Russia, Yakutia, SiberiaDiamond inclusions, craton, eclogite, peridotite
DS200412-1870
2003
Sobolev, N.V.Sobolev, N.V., Logvinova, A.M., Zedgenizov, D.A., Yefimova, E.S.Mineral inclusions in microdiamonds and macrodiamonds from kimberlites of Yakutia: a comparative study.8 IKC Program, Session 3, AbstractRussia, Yakutia, SiberiaDiamonds - inclusions
DS200412-1871
2003
Sobolev, N.V.Sobolev, N.V., Shatsky, V.S., Liou, J.G., Zhang, R.Y., Hwang, Shen, Chu, Yui, Zayachkovsky, KasymovAn origin of microdiamonds in metamorphic rocks of the Kokchetav Massif, northern Kazakhstan. US Russian civilian research andEpisodes, December, pp. 290-294.Russia, KazakhstanGenesis - microdiamonds
DS200412-1973
2003
Sobolev, N.V.Taylor, L.A., Anand, M., Promprated, P., Floss, C., Sobolev, N.V.The significance of mineral inclusions in large diamonds from Yakutia, Russia.American Mineralogist, Vol. 88, 5/6, pp. 912-928.Russia, YakutiaDiamond - inclusions, protogenetic Deposit - Udachnaya, Mir, Aikhal
DS200412-1974
2003
Sobolev, N.V.Taylor, L.A., Snyder, G.A., Keller, R., Remley, D.A., Anand,M., Wiesli, R., Valley, J., Sobolev, N.V.Petrogenesis of Group A eclogites and websterites: evidence from the Obnazhennaya kimberlite, Yakutia.Contributions to Mineralogy and Petrology, Vol. 145, pp. 424-443.Russia, YakutiaPetrology, genesis Deposit - Obnazhennaya
DS200412-2027
2004
Sobolev, N.V.Urakaev, F.Kh., Palyanov, Yu.N., DShevchenko, V.S., Sobolev, N.V.Abrasive reactive Mechano chemical synthesis of cohenite with the application of diamond.Doklady Earth Sciences, Vol. 394, 2, pp. 214-218.TechnologyPetrology - experimental
DS200412-2199
2004
Sobolev, N.V.Zedgenizov, D.A., Kagi, H., Shatsky, V.S., Sobolev, N.V.Carbonatitic melts in cuboid diamonds from the Udachnaya kimberlite pipe ( Yukatia): evidence from vibrational spectroscopy.Mineralogical Magazine, Vol. 6, 1, pp. 61-73.Russia, YakutiaDiamond morphology
DS200512-0129
2004
Sobolev, N.V.Buzlukova, L.V., Shatsky, V.S., Sobolev, N.V.Specific structure of the lowermost Earth's crust at the Zagadochnaya kimberlite pipe.Russian Geology and Geophysics, Vol. 45, 8, pp. 942-959.Russia, YakutiaStructure - Zagadochnaya
DS200512-0454
2005
Sobolev, N.V.Hwang, S.L., Shen, P., Chu, H-T., Yui, T-F., Liou, J.G., Sobolev, N.V., Shatsky, V.S.Crust derived potassic fluid in metamorphic microdiamond.Earth and Planetary Science Letters, Vol. 231, 3-4, March 15, pp. 295-306.Russia, SiberiaKokchetav massif
DS200512-0455
2004
Sobolev, N.V.Hwang, S.L., Shen, P., Chu, H-T., Yui, T-F, Liou, J.G., Sobolev, N.V., Zhang, R-Y., Shatsky, V.S., ZayachkovskyKokchetavite: a new potassium feldspar polymorph from the Kokchetav ultrahigh pressure terrane.Contributions to Mineralogy and Petrology, Vol. 148, 3, pp. 380-RussiaUHP
DS200512-0495
2004
Sobolev, N.V.Kamenetsky, M.B., Sobolev, A.V., Kamenetsky, V.S., Maas, R., Danyushevsky, L.V., Thomas, R., Pokhilenko, N.P., Sobolev, N.V.Kimberlite melts rich in alkali chlorides and carbonates: a potent metasomatic agent in the mantle.Geology, Vol. 32, 10, Oct. pp. 845-848.Russia, Siberia, YakutiaUdachnaya, Group I, volatiles, metasomatism, inclusions
DS200512-0666
2005
Sobolev, N.V.Maas, R., Kamenetsky, M.B., Sobolev, A.V., Kamenetsky, V.S., Sobolev, N.V.Sr Nd Pb isotope evidence for a mantle origin of alkali chlorides and carbonates in the Udachnaya kimberlite, Siberia.Geology, Vol. 33, 7, July, pp. 549-552.Russia, SiberiaGeochronology - Udachnaya
DS200512-0817
2005
Sobolev, N.V.Palyanov, Y.N., Sokol, A.G., Tomilenko, A.A., Sobolev, N.V.Conditions of diamond formation through carbonate silicate interaction.European Journal of Mineralogy, Vol. 17, 2, pp. 207-214.Diamond genesis
DS200512-0968
2005
Sobolev, N.V.Shatsky, V.S., Zedgenizov, D.A., Ragozin, A.L., Mityukhin, S.I., Sobolev, N.V.Evidence for metasomatic formation of diamond in eclogite xenolith from the Udachnaya kimberlite pipe.Doklady Earth Sciences, Vol. 402, 4, pp. 587-90.Russia, YakutiaMetasomatism
DS200512-1018
2004
Sobolev, N.V.Sobolev, N.V., Loginova, A.M.Pyrope inclusions in chrome spinels from kimberlites and lamproites and their significance for estimation of the paragenetic assemblage and formation depth.Doklady Earth Sciences, Vol. 399, Oct-Nov. pp. 1074-8.RussiaMineralogy - pyrope
DS200512-1019
2004
Sobolev, N.V.Sobolev, N.V., Logvinova, A.M.Significance of accessory chrome spinel in identifying serpentinite paragenesis.International Geology Review, Vol. 47, 1, pp. 58-64.Russia, YakutiaMineralogy - Udabchnaya
DS200512-1020
2004
Sobolev, N.V.Sobolev, N.V., Logvinova, O.V.Pyrope inclusions in chrome spinels from kimberlites and lamproites and their significance for estimation of the paragenetic assemblage and formation depth.Doklady Earth Sciences, Vol. 399, 8, pp.1074-1079.MantleMineralogy - inclusions
DS200612-0004
2006
Sobolev, N.V.Agashev, A.M., Pokhilenko, N.P., Malkovets, V.G., Sobolev, N.V.Sm Nd isotopic system in garnet megacrysts from the Udachnaya kimberlite pipe (Yakutia) and petrogenesis of kimberlites.Doklady Earth Sciences, Vol. 407A, 3, pp. 491-494.Russia, YakutiaGeochronology - Udachnaya
DS200612-0613
2006
Sobolev, N.V.Hwang, S.L., Chu, H-T., Yui, T-F., Shen, P., Schertl, H-P., Liou, J.G., Sobolev, N.V.Nanometer size P/K rich silica glass (former melt) inclusions in microdiamond from the gneisses of Kokchetav and Erzgebirge massifs: diversified...Earth and Planetary Science Letters, in pressRussia, Europe, GermanyUHP metamorphic microdiamonds, host rock buffering
DS200612-0832
2005
Sobolev, N.V.Logvinova, A.M., Taylor, L.A., Floss, C., Sobolev, N.V.Geochemistry of multiple diamond inclusions of harzburgite garnets as examined in situ.International Geology Review, Vol. 47, 12, Dec. pp. 1223-1233.RussiaDiamond inclusions
DS200612-0833
2006
Sobolev, N.V.Logvinova, A.M., Wirth, R., Sobolev, N.V.Nanometric sized mineral and fluid inclusions in cloudy Siberian diamonds: new insights on diamond formation. Internationalnaya, Yubileynaya.International Mineralogical Association 19th. General Meeting, held Kobe, Japan July 23-28 2006, Abstract p. 137.Russia, SiberiaDiamond inclusions
DS200612-1022
2006
Sobolev, N.V.Palyanov, Yu.N., Borzdov, Yu.M., Khokhryakov, A.F., Kupriyanov, I.N., Sobolev, N.V.Sulfide melts - graphite interaction at HPHT conditions: implications for diamond genesis.Earth and Planetary Science Letters, Vol. 250, 1-2, Oct. 15, pp. 269-280.MantleUHP, diamond genesis, carbon
DS200612-1023
2005
Sobolev, N.V.Palynaov, Y.N., Sokol, A.G., Sobolev, N.V.Experimental modeling of mantle diamond forming processes.Russian Geology and Geophysics, Vol. 46, 12, pp. 1271-1284.MantleDiamond genesis
DS200612-1195
2006
Sobolev, N.V.Rylov, G.M., Fedorova, E.N., Sobolev, N.V.Study of the internal structure of imperfect diamond crystals by the Lane-SR method.Russian Geology and Geophysics, Vol. 47, 2, pp. 249-256.TechnologyDiamond morphology
DS200612-1271
2005
Sobolev, N.V.Shatsky, V.S., Palyanov, Y.N., Sokol, A.G., Tomilenko, A.A., Sobolev, N.V.Diamond formation in UHP dolomite marbles and garnet pyroxene rocks of the Kokchetav Massif, northern Kazakstan: natural and experimental evidence.International Geology Review, Vol. 47, 10, pp. 999-1010.RussiaUHP
DS200612-1272
2006
Sobolev, N.V.Shatsky, V.S., Ragozin, A.J., Sobolev, N.V.Some aspects of metamorphic evolution of ultrahigh pressure calc-silicate rocks.Russian Geology and Geophysics, Vol. 47, 1 pp. 105-119.MantleUHP
DS200612-1328
2006
Sobolev, N.V.Sobolev, N.V.The new Komsomolskaya mine in Yakutia, Russia: unique features of its diamonds.GIA Gemological Research Conference abstract volume, Held August 26-27, p. 28. 1/2p.Russia, YakutiaDiamond morphology, crystallography
DS200612-1329
2006
Sobolev, N.V.Sobolev, N.V.Coesite as an indicator of ultrahigh pressures in continental lithosphere.Russian Geology and Geophysics, Vol. 47, 1 pp. 94-104.MantleUHP - coesite
DS200612-1330
2006
Sobolev, N.V.Sobolev, N.V., Logvinova, A.M., Zedgenizov, D.A., Kuzmin, D.V., Sobolev, A.V.Olivine inclusions in Siberian diamonds: high precision approach to trace elements.International Mineralogical Association 19th. General Meeting, held Kobe, Japan July 23-28 2006, Abstract p. 137.Russia, SiberiaGeochemistry - mineral inclusiosn
DS200612-1331
2006
Sobolev, N.V.Sobolev, N.V., Schertl, H.P., Neuser, R.D.Composition and paragenesis of garnets from ultrahigh pressure calc-silicate metamorphic rocks of the Kokchetav massif.Russian Geology and Geophysics, Vol. 47, 4, pp. 519-Russia, KazakhstanUHP - geochemistry garnets
DS200612-1585
2006
Sobolev, N.V.Zegrenizov, D.A., Harte, B., Shatsky, V.S., Politov, A.A., Rylov, G.M., Sobolev, N.V.Directional chemical variations in diamonds showing octahedral following cuboid growth.Contributions to Mineralogy and Petrology, Vol. 151, 1, Jan. pp. 45-57.Russia, YakutiaMineral chemistry, subduction
DS200712-0799
2007
Sobolev, N.V.Palynaov, Y.N., Shatsky, V.S., Sobolev, N.V., Sokol, A.G.The role of mantle uptrapotassic fluids in diamond formation.Proceedings of National Academy of Sciences USA, Vol. 104, 22, pp. 9122-9127. IngentaMantleDiamond genesis
DS200712-0922
2007
Sobolev, N.V.Rylov, G.M., Fedorova, E.N., Logvinova, A.M., Pokhilenko, N.P., Kulipanov, G.N., Sobolev, N.V.The peculiarities of natural plastically deformed diamond crystals from Internationalnaya pipe, Yakutia.Nuclear Instruments and Methods in Physics Research Section A., Vol. 575, 1-2, pp. 152-154.RussiaDiamond morphology
DS200712-1010
2007
Sobolev, N.V.Sobolev, N.V., Schertl, H-P., Neuser, R.D., Shatsky, V.S.Relict unusually low iron pyrope grossular garnets from UHPM calc-silicate rocks of the Kochetav Massif, Kazakhstan.International Geology Review, Vol. 49, 8, pp. 717-731.Russia, KazakhstanUHP
DS200712-1042
2007
Sobolev, N.V.Stepanov, A.S., Shatsky, V.S., Zedgenizov, D.A., Sobolev, N.V.Causes of variations in morphology and impurities of diamonds from the Udachnaya pipe eclogite.Russian Geology and Geophysics, Vol. 48, no. 9, pp. 758-769.Russia, YakutiaDiamond morphology
DS200812-0002
2008
Sobolev, N.V.Afanasev, V.P., Nikolenko, E.I., Tychikov, N.S., Titov, A.T., Tolstov, A.V., Kornilova, V.P., Sobolev, N.V.Mechanical abrasion of kimberlite indicator minerals: experimental investigations.Russian Geology and Geophysics, Vol. 49, 2, pp. 91-97.TechnologyMineralogy
DS200812-0004
2008
Sobolev, N.V.Agashev, A.M., Pokhilenko, N.P., Takazawa, E., McDonald, J.A., Vavilov, M.A., Watanabe, T., Sobolev, N.V.Primary melting sequence of a deep ( >250 km) lithospheric mantle as recorded in the geochemistry of kimberlite carbonatite assemblages, Snap Lake dyke system, Canada.Chemical Geology, Vol. 255, 3-4, pp. 317-328.Canada, Northwest TerritoriesDeposit - Snap Lake
DS200812-0683
2008
Sobolev, N.V.Logvinova, A.M., Wirth, R., Federova, E.N., Sobolev, N.V.Nanometre-sized mineral and fluid inclusions in cloudy Siberian diamonds: new insights on diamond formation.European Journal of Mineralogy, Vol. 20, no. 3, pp. 317-331.Russia, SiberiaDiamond genesis
DS200812-0684
2008
Sobolev, N.V.Logvinova, A.M., Wirth, R., Fedorova, E.N., Sobolev, N.V.Multi phase assemblages of nanometer sized inclusions in cloudy Siberian diamonds: evidence from TEM.Deep Seated Magmatism, its sources and plumes, Ed. Vladykin, N.V., 2008 pp. 53-70.Russia, SiberiaDiamond inclusions
DS200812-1046
2008
Sobolev, N.V.Sharygin, V.V., Sobolev, N.V., Channer, D.M.DeR.Oscillatory zoned crystals of the pyrochlore group minerals from the Guaniamo kimberlites, Venezuela: first occurrence of pyrochlore in kimberlite.9IKC.com, 3p. extended abstractSouth America, VenezuelaDeposit - Guaniamo
DS200812-1092
2008
Sobolev, N.V.Sobolev, N.V., Logvinova, A.M., Zedgenizov, D.A., Pokhilenko, N.P., Kuzmin, D.V., Sobolev, A.V.Olivine inclusions in Siberian diamonds: high precision approach to minor elements.European Journal of Mineralogy, Vol. 20, no. 3, pp. 305-315.Russia, SiberiaDiamond inclusions
DS200912-0003
2009
Sobolev, N.V.Afanasyev, V.P., Agashev, A.M., Orihashi, Y., Pokhilenko, N.P., Sobolev, N.V.Paleozoic U Pb age of rutile inclusions in diamonds of the V-VII variety from placers of the northeast Siberian platform.Doklady Earth Sciences, Vol. 428, 1, pp. 1151-1155.RussiaDiamond inclusions
DS200912-0434
2009
Sobolev, N.V.Lenaz, D., Logvinova, A.M., Princivalle, F., Sobolev, N.V.Structural parameters of chromite included in diamond and kimberlites from Siberia: a new tool for discriminating ultramafic source.American Mineralogist, Vol. 94, 7, pp. 1067-1070.Russia, SiberiaDiamond inclusions
DS200912-0708
2009
Sobolev, N.V.Sobolev, N.V., Logvinova, A.M., Zedgenizov, D.A., Pokhilenko, N.P., Malygina, E.V., Kuzmin, D.V., Sobolev, A.V.Petrogenetic significance of minor elements in olivines from diamonds and peridotite xenoliths from kimberlites of Yakutia.Lithos, In press - available 38p.Russia, YakutiaDiamond inclusions
DS200912-0766
2009
Sobolev, N.V.Tomilenko, A.A., Kovyazin, S.V., Pokhilenko, L.N., Sobolev, N.V.Primary hydrocarbon inclusions in garnet of Diamondiferous eclogite from the Udachnaya kimberlite pipe, Yakutia.Doklady Earth Sciences, Vol. 427, 4, pp. 695-8.Russia, YakutiaDeposit - Udachnaya
DS201012-0335
2009
Sobolev, N.V.Kamenetsky, V.S., Kamenetsky, M.B., Sobolev, A.V., Golovin, A.V., Sharyginb, V.V., Pokhilenko, N.P., Sobolev, N.V.Can pyroxenes be liquidus minerals in the kimberlite magma?Lithos, Vol. 112 S pp. 213-235.MantleChemistry
DS201012-0433
2010
Sobolev, N.V.Lenaz, D., Skogby, H., Logvinova, A.M., Princivalle, F., Sobolev, N.V.Fe3+ Fe tot ratio in the mantle: a micro-Mossbauer study of chromites included in diamond and kimberlites.International Mineralogical Association meeting August Budapest, abstract p. 431.Russia, YakutiaOxidation state
DS201012-0690
2009
Sobolev, N.V.Sharygin, V.V., Sobolev, N.V., Channer, D.M.DeR.Oscillatory zoned crystals of pyrochlore group minerals from the Guaniamo kimberlites, Venezuela.Lithos, Vol. 112 S pp. 976-985.South America, VenezuelaMineral chemistry
DS201012-0734
2009
Sobolev, N.V.Sobolev, N.V.Preface: Contribution of Vladimir S. Sobolev to the study of petrology of the lithosphere and diamond genesis.Russian Geology and Geophysics, Vol. 50, 12, pp. 995-998.TechnologyHistory
DS201012-0735
2009
Sobolev, N.V.Sobolev, N.V., Logvinova, A.M., Efimova, E.S.Syngenetic phlogopite inclusions in kimberlite hosted diamonds: implications for role of volatiles in diamond formation.Russian Geology and Geophysics, Vol. 50, 12, pp. 1234-1248.MantleDiamond genesis
DS201012-0804
2009
Sobolev, N.V.Turkin, A.I., Sobolev, N.V.Pyrope knorringite garnets: overview of experimental dat a and natural parageneses.Russian Geology and Geophysics, Vol. 50, 12, pp. 1169-1182.TechnologyGarnet
DS201112-0982
2011
Sobolev, N.V.Sobolev, N.V., Schertl, H-P., Valley, J.W., Page, F.Z., Kita, N.T., Spicuzza, M.J., Neuser, R.D., Logvinova, A.M.Oxygen isotope variations of garnets and clinopyroxenes in a layered Diamondiferous calcsilicate rock from Kokchetav Massif, Kazakhstan: a window into geochemicalContributions to Mineralogy and Petrology, Vol. 162, 5, pp.1079-1092.Russia, KazakhstanDeeply subducted UHPM rocks
DS201112-1050
2011
Sobolev, N.V.Tomilenko, A.A., Kovyazin, S.V., Pokhilenko, L.N., Sobolev, N.V.Silicate globules in kyanite from grospydites of the Zagadochnaya kimberlite pipe, Yakutia: the problem of origin.Doklady Earth Sciences, Vol. 436, 1, pp. 98-101.Russia, YakutiaPetrology
DS201112-1173
2011
Sobolev, N.V.Ziberna, L., Nimis, P., Zanetti, A., Sobolev, N.V., Marzoli, A.Geochemistry of mantle microxenoliths from Zagadochnaya kimberlite, Yakutia, Russia.Goldschmidt Conference 2011, abstract p.2283.Russia, YakutiaNarren Type II kimberlite
DS201212-0061
2012
Sobolev, N.V.Bataleva, Yu.V., Palyanov, Yu.N., Sokol, A.G., Borzdov, Yu.M., Sobolev, N.V.Conditions of formation of Cr-pyrope and escolaite during mantle metasomatism: experimental modeling.Doklady Earth Sciences, Vol. 442, 1, pp. 76-80.TechnologyMetasomatism
DS201212-0197
2012
Sobolev, N.V.Fedorova, E.N., Logvinova, A.M., Mashkovtsev, R., Sobolev, N.V.Internal structure and color of the natural plastically deformed diamonds from the Internationalnaya kimberlite pipe, Yakutia.10th. International Kimberlite Conference Held Bangalore India Feb. 6-11, Poster abstractRussia, YakutiaDeposit - Internationnaya
DS201212-0417
2012
Sobolev, N.V.Logvinova, A.I., Wirth, R., Sobolev, N.V., Taylor, L.A.Multi-phase sub-micrometer silicate sulfide and fluid inclusions in diamonds: expressions of metasomatism evidenced in peridotites and eclogites.10th. International Kimberlite Conference Feb. 6-11, Bangalore India, AbstractRussiaMetasomatism - diamond inclusions
DS201212-0632
2012
Sobolev, N.V.Selyatitskii, A.Yu., Reverdatto, V.V., Kuzmin, D.V., Sobolev, N.V.Minor elements in unusual olivines from high pressure peridotites of the Kokchetav Massif (Northern Kazakhstan).Doklady Earth Sciences, Vol. 445, 2, pp. 1015-1020.Russia, KazakhstanDeposit - Kokchetav
DS201212-0649
2012
Sobolev, N.V.Shirey, S.B., Cartigny, P., Frost, D.J., Nestola, F., Nimis, P., Pearson, D.G., Sobolev, N.V., Walter, M.J.Diamonds and the geology of Earth mantle carbon.GSA Annual Meeting, Paper no. 211-5, abstractMantleSubduction
DS201212-0683
2012
Sobolev, N.V.Sobolev, N.V., Sobolev, A.V., Tomilenko, A.A., Kovyazin, S.V., Kuzmin, D.V.Pyrope lherzolite assemblage of Ti bearing olivine macrocryst from Udachanya ultrafresh kimberlite, Yakutia, Russia.emc2012 @ uni-frankfurt.de, 1p. AbstractRussiaDeposit - Udachnaya
DS201212-0685
2013
Sobolev, N.V.Sokol, A.G., Kupriyanov, I.N., Palyanov, Y.N., Kruk, A.N., Sobolev, N.V.Melting experiments on the Udachnaya kimberlite at 6.3-7.5 Gpa: implications for the role of H2O in magma generation and formation of hydrous olivine.Geochimica et Cosmochimica Acta, Vol. 101, pp. 133-155.RussiaDeposit - Udachnaya
DS201212-0686
2012
Sobolev, N.V.Sokol, A.G., Kupriyanov, I.N., Palyanov, Yu.N., Kruk, A.N., Sobolev, N.V.Melting experiments on the Udachnaya kimberlite at 6.3-7.5 Gpa: implications for the role of H2O in magma generation and formation of hydrous olivine.emc2012 @ uni-frankfurt.de, 1p. AbstractRussiaDeposit - Udachnaya
DS201212-0817
2012
Sobolev, N.V.Zhang, R.Y.,Liou, J.G., Omori, S., Sobolev, N.V., Shatsky, V.S., Iizuka, C.H-O.Tale of the Kulet eclogite from the Koketchev Massive, Kazakhstan: initial tectonic setting and transition from amphibolite to eclogite.Journal of Metamorphic Geology, in press availableRussia, KazakhstanEclogite
DS201312-0152
2013
Sobolev, N.V.Chepurov, A.A., Tychikov, N.S., Sobolev, N.V.Experimental modeling of the conditions of crystallization of subcalcium chromium pyropes.Doklady Earth Sciences, Vol. 452, 2, pp. 1062-1066.RussiaDeposit - Udachnaya
DS201312-0153
2012
Sobolev, N.V.Chepurov, A.I., Sonin, V.M., Chepurov, A.A., Zhimulev, E.I., Kosolobov, S.S., Sobolev, N.V.Diamond interaction with ultradispersed particles of iron in a hydrogene environment: surface micromorphology.Doklady Earth Sciences, Vol. 447, 1, pp. 1284-1287.TechnologyMineralogy
DS201312-0489
2013
Sobolev, N.V.Klein-BenDavid, O., Pearson, D.G., Nowell, G.M., Ottley, C., McNeill, J.C.R., Logvinova, A., Sobolev, N.V.The sources and time integrated evolution of diamond forming fluid - trace elements and Sr isotopic evidence.Geochimica et Cosmochimica Acta, Vol. 125, pp. 146-169.Russia, Africa, Democratic Republic of Congo, Canada, Northwest TerritoriesFibrous diamonds, HDF, Diavik, Udachnaya
DS201312-0531
2013
Sobolev, N.V.Lenaz, D., Skogby, H., Logvinova, A.M., Sobolev, N.V., Princivalle, F.A micro-Mossbauer study of chromites included in diamond and other mantle related rocks.Physics and Chemistry of Minerals, Vol. 40, 9, pp. 671-679.Russia, SiberiaSpectroscopy - diamond
DS201312-0815
2012
Sobolev, N.V.Shirey, S.B., Cartigny, P.,Frost, D.J., Nestola, F., Pearson, D.G., Sobolev, N.V., Walter, M.J.Diamonds and the geology of Earth mantle carbonGeological Society of America Annual Meeting abstract, Paper 211-5, 1/2p. AbstractMantleCarbon
DS201312-0816
2013
Sobolev, N.V.Shirey, S.B., Cartigny, P., Frost, D.J., Keshav, S., Nestola, F., Nimis, P., Pearson, D.G., Sobolev, N.V., Walter, M.J.Diamonds and the geology of mantle carbon.Reviews in Mineralogy and Geochemistry, Vol. 75, pp. 355-421.MantleDiamond genesis
DS201312-0864
2013
Sobolev, N.V.Sokol,A.G.,Kupriyanov, I.N., Palyanov, Y.N., Kruk, A.N., Sobolev, N.V.Melting experiments in the Udachnaya kimberlite at 6.3-7.5 Gpa: implications for the role of H2O in magma generation and formation of hydrous olivine.Geochimica et Cosmochimica Acta, Vol. 101, Jn. 15, pp. 133-155.RussiaDeposit - Udachnaya
DS201312-0869
2012
Sobolev, N.V.Sonin, V.M., Chepurov, A.A., Shcheglov, D.V., Kosolobov, S.S., Logvinova, A.M., Chepurov, A.I., Latyshev, A.V., Sobolev, N.V.Study of the surface of natural diamonds by the method of atomic force microscopy.Doklady Earth Sciences, Vol. 447, 2, pp. 1314-1316.TechnologyDiamond morphology
DS201312-1022
2013
Sobolev, N.V.Ziberna, L., Nimis, P., Zanetti, A., Marzoli, A., Sobolev, N.V.Metasomatic processes in the central Siberian cratonic mantle: evidence from garnet xenocrysts from the Zagadochnaya kimberlite.Journal of Petrology, Vol. 54, pp. 2379-2409.Russia, SiberiaDeposit - Zagadochnaya
DS201412-0101
2014
Sobolev, N.V.Carmody, L., Taylor, L.A., Thaisen, K.G., Tychkov, N., Bodnar, R.J., Sobolev, N.V., Poikhilenko, L.N., Poikilenko, N.P.Ilmenite as a diamond indicator mineral in the Siberian craton: a tool to predict diamond potential.Economic Geology, Vol. 109, no. 3, pp. 775-783.RussiaIlmenite, chemistry
DS201412-0374
2014
Sobolev, N.V.Howarth, G.H., Sobolev, N.V., Pernet-Fisher, J.F., Barry, P.H., Penumado, D., Puplampu, S., Ketcham, R.A., Maisano, J.A., Taylor, D., Taylor, L.A.The secondary origin of diamonds: multi-modal radiation tomography of Diamondiferous mantle eclogites.International Geology Review, Vol. 56, 9, pp. 1172-1180.Russia, Siberia3D
DS201412-0524
2014
Sobolev, N.V.Logvinova, A., Wirth, R., Taylor, L.A., Sobolev, N.V.Aragonite, magnesite and dolomite inclusions in Yakutian diamonds: TEM observations.V.S. Sobolev Institute of Geology and Mineralogy Siberian Branch Russian Academy of Sciences International Symposium Advances in high pressure research: breaking scales and horizons ( Courtesy of N. Poikilenko), Held Sept. 22-26, 1p. AbstractRussia, YakutiaDeposit - Komsomolskaya, Yubileinaya, Udachnaya
DS201412-0658
2014
Sobolev, N.V.Palyanov, Y.N., Bataleva, Y.V., Sokol, A.G., Borzdov, Y.M., Kupriyanov, I.N., Reutsky, V.N., Sobolev, N.V.Mantle slab interaction and redox mechanism of diamond formation.Proceedings of National Academy of Science USA, Vol. 110, 51, Dec. 17, pp.MantleUHP, deep carbon cycle
DS201412-0862
2013
Sobolev, N.V.Sobolev, N.V., Logvinova, A.M., Efimova, E.S.Inclusions of Mn-rich eclogitic garnets in diamonds: evidence for recycling of the Earth's crust.Doklady Earth Sciences, Vol. 451, 1, pp. 1165-1167.TechnologyDiamond morphology
DS201412-0863
2014
Sobolev, N.V.Sobolev, N.V., Sobolev, A.V., Tomilenko, A.A., Kovyazin, S.V., Batanova, V.G., Kuzmin, D.V.Paragenesis and origin of olivine macrocrysts from Udachnaya-East hypabyssal kimberlite, Yakutia, Russia.V.S. Sobolev Institute of Geology and Mineralogy Siberian Branch Russian Academy of Sciences International Symposium Advances in high pressure research: breaking scales and horizons ( Courtesy of N. Poikilenko), Held Sept. 22-26, 2p. AbstractRussia, YakutiaDeposit - Udachnaya-East
DS201502-0074
2015
Sobolev, N.V.Logvinova, A.M., Taylor, L.A., Fedorova, E.N., Yelisseyev, A.P., Wirth, R., Howarth, G., Reutsky, V.N., Sobolev, N.V.A unique Diamondiferous peridoite xenolith from the Udachnaya kimberlite pipe, Yakutia: role of subduction in diamond formation.Russian Geology and Geophysics, Vol. 56, 1, pp. 306-320.Russia, YakutiaDeposit - Udachnaya
DS201502-0086
2015
Sobolev, N.V.Neuser, R.D., Schertl, H-P., Logvinova, A.M., Sobolev, N.V.An EBSD study of olivine inclusions in Siberian diamonds: evidence for syngenetic growth?Russian Geology and Geophysics, Vol. 56, 1, pp. 321-329.RussiaDiamond morphology
DS201502-0101
2015
Sobolev, N.V.Shertl, H.P., Neuser, R.D., Logvinova, A.M., Wirth, R., Sobolev, N.V.Cathodluminescence microscopy of the Kokchetav ultra high pressure calcsilicate rocks: what can we learn from silicates, carbon hosting minerals and diamond?Russian Geology and Geophysics, Vol. 56, 1-2, pp. 100-112.Russia, KazakhstanKokchetav massif
DS201502-0103
2015
Sobolev, N.V.Sobolev, N.V., Dobretsov, N.I., Ohtani, E., Taylor, L.A., Schertl, H-P., Palyanov, Yu.N.Problems related to crystallogenesis and the deep carbon cycle.Russian Geology and Geophysics, Vol. 56, 1-2, pp. 1-12.MantleCarbon cycle
DS201502-0104
2015
Sobolev, N.V.Sobolev, N.V., Sobolev, A.V., Tomilenko, A.A., Kovyazin, S.V., Batanova, V.G., Kuzmin, D.V.Paragenesis and complex zoning of olivine macrocrysts from unaltered kimberlite of the Udachnaya-East pipe, Yakutia: relationship with the kimberlite formation conditions and evolution.Russian Geology and Geophysics, Vol. 56, 1, pp. 260-279.Russia, YakutiaDeposit - Udachnaya-East
DS201504-0202
2015
Sobolev, N.V.Howarth, G.H., Sobolev, N.V., Pernet-Fisher, J.F., Ketcham, R.A., Maisano, J.A., Pokhilenko, L.N., Taylor, D.3-D X-ray tomography of Diamondiferous mantle eclogite xenoliths, Siberia: a review.Journal of Asian Earth Sciences, Vol. 101, 1, pp. 39-67.RussiaDeposit - Udachnaya
DS201509-0427
2015
Sobolev, N.V.Shatsky, V.S., Skuzovatov, S.Yu., Ragozin, A.L., Sobolev, N.V.Mobility of elements in a continental subduction zone: evidence from the UHP metamorphic complex of the Kokchetav massif.Russian Geology and Geophysics, Vol. 56, pp. 1016-1034.RussiaKokchetav massif

Abstract: We studied clastics of high-alumina garnet-kyanite-mica schists and garnet-kyanite-quartz granofelses, including diamond-bearing ones, found in the eluvial sediments near Lake Barchi. In contents of major elements the studied rocks correspond to argillaceous shales. The garnet-kyanite-quartz granofelses are poorer in K (0.49-1.35 wt.% K2O) than the garnet-kyanite-mica schists (4.9-2.2 wt.% K2O) but have the same contents of other major components. The REE patterns of most of the garnet-kyanite-phengite schists are similar to those of the Post-Archean Australian Shale (PAAS) (xLa/Yb = 13). All garnet-kyanite-quartz rocks are much stronger depleted in LREE (xLa/Yb = 1.4) and other incompatible elements. Our studies show that allanite and monazite are the main concentrators of LREE and Th in the garnet-kyanite-phengite rocks of the Barchi site. Monazite, occurring as inclusions in garnet, contains not only LREE but also Th, U, and Pb. Rutile of the nondepleted rocks is enriched in Fe and Nb impurities only. The garnet-kyanite-quartz granofelses bear rutile, apatite, and xenotime as accessory phases. Rutile of the depleted rocks shows wide variations in contents of Nb, Ta, and V impurities. In places, the contents of Nb and Ta reach 10.5 and 2.3 wt.%, respectively. The rutile decomposes into rutile with Nb (1.4 wt.%) and Fe (0.87 wt.%) impurities and titanium oxide rich in Fe (6.61 wt.%), Nb (up to 20.8 wt.%), and Ta (up to 2.81%) impurities. Based on the measured contents of incompatible elements in differently depleted high-alumina rocks, the following series of element mobility during UHP metamorphism has been established: Th > Ce > La > Pr > Nd > K > Ba > Rb > Cs > Sm > Eu. The contents of U, P, and Zr in the depleted rocks are similar to those in the nondepleted rocks. The studies have shown that metapelites subducted to the depths with diamond stability conditions can be depleted to different degrees. This might be either due to their exhumation from different depths of the subduction zone or to the presence of an external source of water controlling the temperature of dissolution of phengite and the formation of supercritical fluid/melt.
DS201509-0428
2015
Sobolev, N.V.Sokol, A.G., Kruk, A.N., Chebotarev, D.A., Palyanov, Yu.N., Sobolev, N.V.The composition of garnet as an indicator of the conditions of peridotite-carbonatite interaction in the subcratonic lithosphere ( Experimental data).Doklady Earth Sciences, Vol. 463, 1, pp. 746-750.MantleGarnet, carbonatite

Abstract: The article focuses on the study of composition of garnets of the lherzolitic and harzburgitic parageneses and the conditions of peridotite. As per the study, reconstruction of the conditions of metasomatism of peridotitic sources of kimberlite is possible in the evolution of garnet. It mentions the importance of dry and hydrous carbonatitic melt upon alteration of peridotitic sources of kimberlite as it acted as an another heat source.
DS201510-1805
2015
Sobolev, N.V.Sobolev, N.V., Sobolev, A.V., Tomilenko, A.A., Batanova, V.G., Tolstov, A.V., Logvinova, A.M., Kuzmin, D.V.Unique compositional pecularities of olivine phenocrysts from the post flood basalt Diamondiferous Malokuonapskaya kimberlite pipe, Yakutia.Doklady Earth Sciences, Vol. 463, 2, pp. 828-832.RussiaDeposit - Malokuonapskaya
DS201512-1978
2015
Sobolev, N.V.Taylor, L.A., Logvinova, A.M., Howarth, G.H., Liu, Y., Peslier, A.H., Rossman, G.R., Guan, Y., Chen, Y., Sobolev, N.V.Low water contents in diamond mineral inclusions: proto-genetic origin in a dry cratonic lithosphere.Earth and Planetary Science Letters, Vol. 433, pp. 125-132.MantleNAMs Nominally Anhydrous Minerals

Abstract: The mantle is the major reservoir of Earth's water, hosted within Nominally Anhydrous Minerals (NAMs) (e.g., , , and ), in the form of hydrogen bonded to the silicate's structural oxygen. From whence cometh this water? Is the water in these minerals representative of the Earth's primitive upper mantle or did it come from melting events linked to crustal formation or to more recent metasomatic/re-fertilization events? During diamond formation, NAMs are encapsulated at hundreds of kilometers depth within the mantle, thereby possibly shielding and preserving their pristine water contents from re-equilibrating with fluids and melts percolating through the lithospheric mantle. Here we show that the NAMs included in diamonds from six locales on the Siberian Craton contain measurable and variable H2O concentrations from 2 to 34 parts per million by weight (ppmw) in olivine, 7 to 276 ppmw in clinopyroxene, and 11-17 ppmw in garnets. Our results suggest that if the inclusions were in equilibrium with the diamond-forming fluid, the water fugacity would have been unrealistically low. Instead, we consider the H2O contents of the inclusions, shielded by diamonds, as pristine representatives of the residual mantle prior to encapsulation, and indicative of a protogenetic origin for the inclusions. Hydrogen diffusion in the diamond does not appear to have modified these values significantly. The H2O contents of NAMs in mantle xenoliths may represent some later metasomatic event(s), and are not always representative of most of the continental lithospheric mantle. Results from the present study also support the conclusions of Peslier et al. (2010) and Novella et al. (2015) that the dry nature of the SCLM of a craton may provide stabilization of its thickened continental roots.
DS201601-0047
2015
Sobolev, N.V.Tomilenko, A.A., Kuzmin, D.V., Bulbak, T.A., Timina, T.Yu., Sobolev, N.V.Composition of primary fluid and melt inclusions in regenerated olivines from hypabyssal kimberlites of the Malokuonapskaya pipe ( Yakutia).Doklady Earth Sciences, Vol. 465, 1, pp. 1168-1171.RussiaDeposit - Malokuonapskaya
DS201602-0206
2016
Sobolev, N.V.Grakhanov, S.A., Zinchuk, N.N., Sobolev, N.V.The age of predictable primary diamond sources in the northeastern Siberian platform.Doklady Earth Sciences, Vol. 465, 2, pp. 1297-1301.Russia, SiberiaDeposit - Malokuonapskaya

Abstract: The U-Pb (SHRIMP) age was determined for zircons collected from 26 observation and sampling sites of diamonds and index minerals in the northeastern Siberian Platform. This part of the region hosts 15 low-diamondiferous Paleozoic and Mesozoic kimberlite fields, excluding the near economic Triassic Malokuonapskaya pipe in the Kuranakh field. Four epochs of kimberlite formation (Silurian, Late Devonian to Early Carboniferous, Middle to Late Triassic, and Middle to Late Jurassic) of the Siberian Platform, including its northeastern part, are confirmed as a result of our studies. Most observation points, including economic Quaternary diamond placers, contain Middle to Late Triassic zircons, which confirms the abundant Late Triassic volcanism in this region. The positive correlation of diamonds and major index minerals of kimberlites (mostly, garnets) at some observation sites indicates the possible Triassic age of the predictable diamondiferous kimberlites.
DS201602-0240
2016
Sobolev, N.V.Sokol, A.G., Kruk, A.N., Chebotarev, D.A., Palynaov, Yu.N., Sobolev, N.V.Conditions of carbonation and wehrlitization of lithospheric peridotite upon interaction with carbonatitic melts.Doklady Earth Sciences, Vol. 465, 2, pp. 1262-1267.RussiaDeposit - Udachnaya

Abstract: Study of the mechanism of carbonation and wehrlitization of harzburgite upon metasomatism by carbonatitic melts of various genesis was carried out. Experiments with durations of 60-150 h were performed at 6.3 GPa and 1200°C. The data showed that carbonatite with MgO/CaO > 0.3 percolating into the peridotitic lithosphere may provide crystallization of magnesite in it. The influence of all studied carbonatites results in wehrlitization of peridotite. The compositions of melts formed by interaction with harzburgite (~2 wt % SiO2, Ca# = 36-47) practically do not depend on the composition of the initial carbonatite. Based on the data obtained, we conclude that the formation of magnesite-bearing and magnesite-free metasomatized peridotites may have a significant influence on the CO2 regime in the further generation of kimberlitic magmas of groups I and II.
DS201602-0245
2016
Sobolev, N.V.Taylor, L.A., Logvinova, A.M., Howarth, G.H., Liu, Y., Peslier, A.H., Rossman, G.R., Guan, Y., Chen, Y., Sobolev, N.V.Low water contents in diamond mineral inclusions: proto-genetic origin in a dry cratonic lithosphere.Earth and Planetary Science Letters, Vol. 433, pp. 125-132.Russia, AfricaKaapvaal and Siberian SCLMs

Abstract: The mantle is the major reservoir of Earth's water, hosted within Nominally Anhydrous Minerals (NAMs) (e.g., , , and ), in the form of hydrogen bonded to the silicate's structural oxygen. From whence cometh this water? Is the water in these minerals representative of the Earth's primitive upper mantle or did it come from melting events linked to crustal formation or to more recent metasomatic/re-fertilization events? During diamond formation, NAMs are encapsulated at hundreds of kilometers depth within the mantle, thereby possibly shielding and preserving their pristine water contents from re-equilibrating with fluids and melts percolating through the lithospheric mantle. Here we show that the NAMs included in diamonds from six locales on the Siberian Craton contain measurable and variable H2O concentrations from 2 to 34 parts per million by weight (ppmw) in olivine, 7 to 276 ppmw in clinopyroxene, and 11-17 ppmw in garnets. Our results suggest that if the inclusions were in equilibrium with the diamond-forming fluid, the water fugacity would have been unrealistically low. Instead, we consider the H2O contents of the inclusions, shielded by diamonds, as pristine representatives of the residual mantle prior to encapsulation, and indicative of a protogenetic origin for the inclusions. Hydrogen diffusion in the diamond does not appear to have modified these values significantly. The H2O contents of NAMs in mantle xenoliths may represent some later metasomatic event(s), and are not always representative of most of the continental lithospheric mantle. Results from the present study also support the conclusions of Peslier et al. (2010) and Novella et al. (2015) that the dry nature of the SCLM of a craton may provide stabilization of its thickened continental roots.
DS201605-0887
2016
Sobolev, N.V.Rezvukhin, D.I., Malkovets, V.G., Sharygin, I.S., Kuzmin, D.V., Litasov, K.D., Gibsher, A.A., Pokhilenko, N.P., Sobolev, N.V.Inclusions of Cr- and Cr-Nb-Rutile in pyropes from the Internationalnaya kimberlite pipe, Yakutia.Doklady Earth Sciences, Vol. 466, 2, Feb. pp. 173-176.Russia, YakutiaDeposit - International

Abstract: The results of study of rutile inclusions in pyrope from the Internatsionalnaya kimberlite pipe are presented. Rutile is characterized by unusually high contents of impurities (up to 25 wt %). The presence of Cr2O3 (up to 9.75 wt %) and Nb2O5 (up to 15.57 wt %) are most typical. Rutile inclusions often occur in assemblage with Ti-rich oxides: picroilmenite and crichtonite group minerals. The Cr-pyropes with inclusions of rutile, picroilmenite, and crichtonite group minerals were formed in the lithospheric mantle beneath the Mirnyi field during their joint crystallization from melts enriched in Fe, Ti, and other incompatible elements as a result of metasomatic enrichment of the depleted lithospheric mantle.
DS201605-0888
2016
Sobolev, N.V.Rezvukhin, D.I., Malkovets, V.G., Sharygin, I.S., Kuzmin, D.V., Litasov, K.D., Gibsher, A.A., Pokhilenko, N.P., Sobolev, N.V.Inclusions of crichonite group minerals in pyropes from the Internatsionalnaya kimberlite pipe, Yakutia.Doklady Earth Sciences, Vol. 466, 2, Feb. pp. 206-209.Russia, YakutiaDeposit - International
DS201606-1101
2016
Sobolev, N.V.Kruk, A.N., Sokol, A.G., Chebotarev, D.A., Palyanov, Yu.A., Sobolev, N.V.Composition of a carbonatitic melt in equilibrium with lherzolite at 5.5-6.3 Gpa and 1350C.Doklady Earth Sciences, Vol. 467, 1, pp. 303-307.Carbonatite

Abstract: Generation of ultra-alkaline melts by the interaction of lherzolite with cardonatites of various genesis was simulated at the P-T parameters typical of the base of the subcratonic lithosphere. Experiments with a duration of 150 h were performed at 5.5 and 6.3 GPa and 1350°C. The concentrations of CaO and MgO in melts are buffered by the phases of peridotite, and the concentrations of alkalis and FeO depend on the composition of the starting carbonatite. Melts are characterized by a low (<7 wt %) concentration of SiO2 and Ca# from 0.40 to 0.47. It is demonstrated that only high-Mg groups of carbonatitic inclusions in fibrous diamonds have a composition close to that of carbonatitic melts in equilibrium with lherzolite. Most likely, the formation of kimberlite-like melts relatively enriched in SiO2 requires an additional source of heat from mantle plumes and probably H2O fluid.
DS201608-1445
2016
Sobolev, N.V.Tomilenko, A.A., Bulbak, T.A., Khomenko, M.O., Kuzmin, D.V., Sobolev, N.V.The composition of volatile components in olivines from Yakutian kimberlites of various ages: evidence from gas chromatography - mass spectrometry.Doklady Earth Sciences, Vol. 469, 1, pp. 690-694.RussiaDeposit - Olivinvaya, Malokuonapskaya, Udachnaya-East

Abstract: The composition of volatiles from fluid and melt inclusions in olivine phenocrysts from Yakutian kimberlite pipes of various ages (Olivinovaya, Malokuonapskaya, and Udachnaya-East) were studied for the first time by gas chromatography-mass spectrometry. It was shown that hydrocarbons and their derivatives, as well as nitrogen-, halogen-, and sulfur-bearing compounds, played a significant role in the mineral formation. The proportion of hydrocarbons and their derivatives in the composition of mantle fluids could reach 99%, including up to 4.9% of chlorineand fluorine-bearing compounds.
DS201610-1874
2016
Sobolev, N.V.Jean, M.M., Taylor, L.A., Howarth, G.H., Peslier, A.H., Fedele, L., Bodnar, R.J., Guan, Y., Doucet, L.S., Ionov, D.A., Logvinova, A.M., Golovin, A.V., Sobolev, N.V.Olivine inclusions in Siberian diamonds and mantle xenoliths: contrasting water and trace -element contents.Lithos, in press available 11p.Russia, SiberiaDiamond inclusions
DS201610-1886
2016
Sobolev, N.V.Melkovets, V.G., Rezvukhin, D.I., Belousova, E.A., Griffin, W.L., Sharygin, I.S., Tretiakova, I.G., Pokhilenko, N.P., Sobolev, N.V.Cr-rich rutile: a powerful tool for diamond exploration.Lithos, in press available 8p.Russia, SiberiaDeposit - Internationalnaya

Abstract: Mineralogical studies and U-Pb dating have been carried out on rutile included in peridotitic and eclogitic garnets from the Internatsionalnaya pipe, Mirny field, Siberian craton. We also describe a unique peridotitic paragenesis (rutile + forsterite + enstatite + Cr-diopside + Cr-pyrope) preserved in diamond from the Mir pipe, Mirny field. Compositions of rutile from the heavy mineral concentrates of the Internatsionalnaya pipe and rutile inclusions in crustal almandine-rich garnets from the Mayskaya pipe (Nakyn field), as well as from a range of different lithologies, are presented for comparison. Rutile from cratonic mantle peridotites shows characteristic enrichment in Cr, in contrast to lower-Cr rutile from crustal rocks and off-craton mantle. Rutile with Cr2O3 > 1.7 wt% is commonly derived from cratonic mantle, while rutiles with lower Cr2O3 may be both of cratonic and off-cratonic origin. New analytical developments and availability of standards have made rutile accessible to in situ U-Pb dating by laser ablation ICP-MS. A U-Pb age of 369 ± 10 Ma for 9 rutile grains in 7 garnets from the Internatsionalnaya pipe is consistent with the accepted eruption age of the pipe (360 Ma). The equilibrium temperatures of pyropes with rutile inclusions calculated using Ni-in-Gar thermometer range between ~ 725 and 1030 °C, corresponding to a depth range of ca ~ 100-165 km. At the time of entrainment in the kimberlite, garnets with Cr-rich rutile inclusions resided at temperatures well above the closure temperature for Pb in rutile, and thus U-Pb ages on mantle-derived rutile most likely record the emplacement age of the kimberlites. The synthesis of distinctive rutile compositions and U-Pb dating opens new perspectives for using rutile in diamond exploration in cratonic areas.
DS201610-1909
2016
Sobolev, N.V.Sobolev, N.V., Shatsky, V.S., Zedgenizov, D.A., Ragozin, A.L., Reutsky, V.N.Polycrystalline diamond aggregates from the Mir kimberlite pipe, Yakutia: evidence for mantle metasomatism.Lithos, in press available 10p.RussiaDeposit - Mir

Abstract: Polycrystalline diamond aggregates (boart, framesites, diamondites) have been widely studied but their origin is poorly understood. We report the results of a study in situ of two polished fragments of fine-grained (40-400 µm size of individual diamond grains) dense polycrystalline diamond aggregates from the Mir pipe containing visible multiple interstitial garnet inclusions. They were analyzed for major and trace elements of inclusions and one of them — for d13C and N abundance and isotopic composition of host diamonds. These aggregates are classified as variety IX by Orlov (1977). No cavities were observed in these samples. Sixty two irregular garnet grains and one clinopyroxene inclusion were detected and analyzed in sample Mr 832. Garnets are homogeneous within single grains but variable in Mg# [100Mg/(Mg + Fe)] from 60 up to 87 and CaO contents (3.3-5.3 wt.%) among grains with a trend to negative correlation. Low Cr (550-640 ppm) confirms eclogitic (E-type) paragenesis. High Na2O contents (5.2 wt.%) of a single pyroxene inclusion are additional evidence of eclogitic nature of this sample. Wide variations in trace elements (ppm) are characteristic for garnet grains: Sr (2.7-25.6), Y (9.7-14.1), Zr (15.6-38.7) and positive Eu anomaly is present. The d13C of diamonds within studied sample is variable (- 6.4 ÷- 9.8 ‰) as well as N abundance (75-1150 ppm) and d15N - 27, - 38, - 58 ‰. The second peridotitic (U/P-type) sample Mr 838 contains eight inclusions of Mg-rich Cr-pyropes (Mg# ~ 85, Cr2O3 3.2-3.4 wt.%) and magnesite inclusion with 4.35 wt.% FeO and 1.73 wt.% CaO. Trace element content in pyropes is relatively uniform (ppm): Sr (0.4-1.6), Y (13.2-13.4) and Zr (13.0). We conclude that heterogeneous distribution of the trace elements among garnet grains in Mr 832 and magnesite presence in Mr 838 are indicative of the effects of mantle metasomatism and rapid crystallization shortly before the eruption of the kimberlite.
DS201610-1910
2016
Sobolev, N.V.Sobolev, N.V., Wirth, R., Logvinova, A.M., Yelisseyev, A.P., Kuzmin, D.V.Retrograde isochemical phase transformations of majoritic garnets included in diamonds: a case study of subcalcic Cr-rich majoritic pyrope from a Snap Lake diamond, Canada.Lithos, in press available 11p.Canada, Northwest TerritoriesDeposit - Snap Lake

Abstract: Homogeneity of a peridotitic garnet inclusion in diamond demonstrating excess in Si concentration (i.e. presence of majorite component) was investigated by TEM using FIB prepared foils. The host diamond is a low-nitrogen brown stone, which can be related to type IIa with features of strong plastic deformation. The studied sample is represented by Ca-poor Cr-pyrope of harzburgitic (H) paragenesis from Snap Lake dyke, Canada The garnet had been previously reported to contain Si = 3.16 apfu. The revised examination of the sample, resulted in detection of extremely fine-grained symplectite consisting of low Ca-orthopyroxene, clinopyroxene, Cr-spinel and coesite completely located and isolated in the inner part of the garnet crystal, which forms a sharp interface with the surrounding homogeneous garnet. XRD study confirmed the presence of the minerals constituting the symplectite. EPMA showed an identical bulk chemistry of the nanometer-sized symplectite and garnet. Further polishing of the garnet inclusion on the same surface with diamond removed the symplectite, which possibly was present as a thin lens within garnet. The remaining garnet is completely homogeneous as checked by two profiles, and contains unusually high Ni (118.2 ppm) and depleted REE patterns. Estimated PT formation conditions of this garnet are 10.8 GPa and 1450 °C within asthenosphere. Symplectite testifies partial retrograde isochemical phase transformation of the examined garnet which is suggested to be caused by decompression along with plastic deformation of diamond within the coesite stability field at T > 1000 °C and depth no less than 100 km. Because previously published studies of rare majoritic garnets composition were performed by EPMA only, it is possible that the traces of partial phase transformation (symplectite formation) could have been overlooked without additional XRD and/or TEM/AEM studies.
DS201612-2320
2016
Sobolev, N.V.Malkovets, V.G., Rezvukhin, D.I., Belousova, E.A., Griffin, W.L., Sharygin, I.S., Tretiakov, I.G., Gibsher, A.A., O'Reilly, S.Y., Kuzmin, D.V., Litasov, K.D., Logvinova, A.M., Pokhilenko, N.P., Sobolev, N.V.Cr-rich rutile: a powerful tool for diamond exploration.Lithos, Vol. 265, pp. 304-311.Russia, SiberiaDeposit - Internationalskaya

Abstract: Mineralogical studies and U-Pb dating have been carried out on rutile included in peridotitic and eclogitic garnets from the Internatsionalnaya pipe, Mirny field, Siberian craton. We also describe a unique peridotitic paragenesis (rutile + forsterite + enstatite + Cr-diopside + Cr-pyrope) preserved in diamond from the Mir pipe, Mirny field. Compositions of rutile from the heavy mineral concentrates of the Internatsionalnaya pipe and rutile inclusions in crustal almandine-rich garnets from the Mayskaya pipe (Nakyn field), as well as from a range of different lithologies, are presented for comparison. Rutile from cratonic mantle peridotites shows characteristic enrichment in Cr, in contrast to lower-Cr rutile from crustal rocks and off-craton mantle. Rutile with Cr2O3 > 1.7 wt% is commonly derived from cratonic mantle, while rutiles with lower Cr2O3 may be both of cratonic and off-cratonic origin. New analytical developments and availability of standards have made rutile accessible to in situ U-Pb dating by laser ablation ICP-MS. A U-Pb age of 369 ± 10 Ma for 9 rutile grains in 6 garnets from the Internatsionalnaya pipe is consistent with the accepted eruption age of the pipe (360 Ma). The equilibrium temperatures of pyropes with rutile inclusions calculated using Ni-in-Gar thermometer range between ~ 725 and 1030 °C, corresponding to a depth range of ca ~ 100-165 km. At the time of entrainment in the kimberlite, garnets with Cr-rich rutile inclusions resided at temperatures well above the closure temperature for Pb in rutile, and thus U-Pb ages on mantle-derived rutile most likely record the emplacement age of the kimberlites. The synthesis of distinctive rutile compositions and U-Pb dating opens new perspectives for using rutile in diamond exploration in cratonic areas.
DS201701-0003
2016
Sobolev, N.V.Bataleva, Yu.V., Palyanov, Yu.N., Borzdov, Yu.M., Sobolev, N.V.Graphite and diamond formation via the interaction of iron carbide and Fe, Ni sulfide under mantle P-T parameters.Doklady Earth Sciences, Vol. 471, 1, pp. 1144-1148.TechnologyPetrology - experimental

Abstract: Experimental research in the Fe3C-(Fe,Ni)S system was carried out. The objective of the investigation was to model the reactions of carbide-sulfide interaction related to graphite (diamond) formation in reduced lithosphere mantle domains. T = 1200°C is the formation temperature of the Ni-cohenite + graphite assemblage coexisting with two immiscible melts such as sulfide (Fe60-Ni3-S37)L and metal-sulfide (Fe71-Ni7-S21-C1)L containing dissolved carbon. T = 1300°C is the generation temperature of a unified melt such as (Fe80-Ni6-S10-C4)L characterized by graphite crystallization and diamond growth. The extraction of carbide carbon during the interaction with the sulfide melt can be considered as one of the potential mechanisms of graphite and diamond formation in the reduced mantle.
DS201705-0876
2017
Sobolev, N.V.Sokol, A.G., Kruk, A.N., Palynov, Y.N., Sobolev, N.V.Stability of phlogopite in ultrapotassic kimberlite-like systems at 5.5-7.5 Gpa.Contributions to Mineralogy and Petrology, in press available 22p.MantleMetasomatism, magmatism, carbonatite

Abstract: Hydrous K-rich kimberlite-like systems are studied experimentally at 5.5-7.5 GPa and 1200-1450 °C in terms of phase relations and conditions for formation and stability of phlogopite. The starting samples are phlogopite-carbonatite-phlogopite sandwiches and harzburgite-carbonatite mixtures consisting of Ol + Grt + Cpx + L (±Opx), according to the previous experimental results obtained at the same P-T parameters but in water-free systems. Carbonatite is represented by a K- and Ca-rich composition that may form at the top of a slab. In the presence of carbonatitic melt, phlogopite can partly melt in a peritectic reaction at 5.5 GPa and 1200-1350 °C, as well as at 6.3-7.0 GPa and 1200 °C: 2Phl + CaCO3 (L)?Cpx + Ol + Grt + K2CO3 (L) + 2H2O (L). Synthesis of phlogopite at 5.5 GPa and 1200-1350 °C, with an initial mixture of H2O-bearing harzburgite and carbonatite, demonstrates experimentally that equilibrium in this reaction can be shifted from right to left. Therefore, phlogopite can equilibrate with ultrapotassic carbonate-silicate melts in a = 150 °C region between 1200 and 1350 °C at 5.5 GPa. On the other hand, it can exist but cannot nucleate spontaneously and crystallize in the presence of such melts in quite a large pressure range in experiments at 6.3-7.0 GPa and 1200 °C. Thus, phlogopite can result from metasomatism of peridotite at the base of continental lithospheric mantle (CLM) by ultrapotassic carbonatite agents at depths shallower than 180-195 km, which creates a mechanism of water retaining in CLM. Kimberlite formation can begin at 5.5 GPa and 1350 °C in a phlogopite-bearing peridotite source generating a hydrous carbonate-silicate melt with 10-15 wt% SiO2, Ca# from 45 to 60, and high K enrichment. Upon further heating to 1450 °C due to the effect of a mantle plume at the CLM base, phlogopite disappears and a kimberlite-like melt forms with SiO2 to 20 wt% and Ca# = 35-40.
DS201709-2022
2017
Sobolev, N.V.Logvinova, A.M., Wirth, R., Sobolev, N.V.Hydrous silicates within black cloudy zone in diamonds.Goldschmidt Conference, abstract 1p.Canada, Northwest Territoriesdeposit - Diavik

Abstract: Is there the existence of a water-rich zone in the mantle, currently one of the most discussed problem in mantle petrology? There are recent studies of low-water content in nominally anhydrous minerals in diamonds [1] and the chemistry of exceptionally rare phlogopite inclusions coexisting with peridotitic and eclogitic minerals in kimberlite-hosted diamonds [2]. Previous studies have shown that some rapidly formed diamonds reflect the composition of the environment in which they formed [3]. The minerals trapped during nucleation stage remain shielded from any changing conditions during further diamond growth or later mantle metasomatism. Thus, the analysis of diamond microinclusions is a major tool for the direct study of mantle high-density fluids (HDFs) from which the diamonds have precipitated [4]. Using transmission electron microscopy (TEM) techniques, we have investigated hydrous silicates inside nanometerscale, polyphased unclusions, especially in dark cloudy alluvial and kimberlite diamonds. Clinohumite, phlogopite, and phengite were detected. Hydrous silicate phases are accompanied by Ba-Sr-Ca -Fe-Mg carbonates, in addition to sulfides, oxides (magnetite, rutile, ilmenite), F-apatite, KCl, graphite, and fluid bubbles. A contrast occurs between clinohumite associated with phlogopite, F-apatite and highMg carbonates, but phengite, accompanied by a Al, Kbearing, unidentified silicate. These inclusions reflect the composition of fluid from which the host diamond crystallized. The mica composition, in most cases, has excess Si, similar to the high-silica mica identified within diamond microinclusions from Diavik [5]. The fluid-bearing carbonatitic-silicic diamonds grew in water-rich environments with extremely high K-activity, compared to most diamonds, which grew only within limited zones in the Earth’s mantle.
DS201709-2064
2017
Sobolev, N.V.Tomilenko, A.A., Dublansky, Yu.V., Kuzmin, D.V., Sobolev, N.V.Isotope compositions of C and O of magmatic calcites from the Udachnaya-East pipe kimberlite, Yakutia.Doklady Earth Sciences, Vol. 475, 1, pp. 828-831.Russia, Yakutiadeposit - Udachnaya-East

Abstract: It has been demonstrated for the first time that the isotopic compositions of carbon (d13C) in magmatic calcites from the Udachnaya–East pipe kimberlite groundmass varies from–2.5 to–1.0‰ (V-PDB), while those of oxygen (d18O) range from 15.0 to 18.2‰ (V-SMOW). The obtained results imply that during the terminal late magmatic and postmagmatic stages of the kimberlite pipe formation, the carbonates in the kimberlite groundmass became successively heavier isotopically, which indicates the hybrid nature of the carbonate component of the kimberlite: it was formed with contributions from mantle and sedimentary marine sources.
DS201710-2266
2017
Sobolev, N.V.Sobolev, N.V., Schertle, H-P., Neuser, R.D., Tomilenko, A.A., Kuzmin, D.V., Loginova, A.M., Tolstov, A.V., Kostrovitsky, S.I., Yakovlev, D.A., Oleinikov, O.B.Formation and evolution of hypabyssal kimberlites from the Siberian craton: part 1 - new insights from cathodluminescence of the carbonates. Anabar and Olenek areaJournal of Asian Earth Sciences, Vol. 145, pt. B, pp. 670-678.Russia, Siberiadeposit - Kuranakh, Kharamay
DS201710-2269
2017
Sobolev, N.V.Tomilenko, A.A., Kuzmin, D.V., Bulbak, T.A., Sobolev, N.V.Primary melt and fluid inclusions in regenerated crystals and phenocrysts of olivine from kimberlites of the Udachnaya-East pipe, Yakutia: the problem of the kimberlite melt.Doklady Earth Sciences, Vol. 475, 2, pp. 949-952.Russiadeposit - Udachnaya-East

Abstract: The primary melt and fluid inclusions in regenerated zonal crystals of olivine and homogeneous phenocrysts of olivine from kimberlites of the Udachnaya-East pipe, were first studied by means of microthermometry, optic and scanning electron microscopy, electron and ion microprobe analysis (SIMS), inductively coupled plasma mass-spectrometry (ICP MSC), and Raman spectroscopy. It was established that olivine crystals were regenerated from silicate-carbonate melts at a temperature of ~1100°C.
DS201712-2728
2017
Sobolev, N.V.Seryotkin, Yu.V., Skvortsova, V.L., Logvinova, A.M., Sobolev, N.V.Results of study of crystallographic orientation of olivine and diamond from Udachnaya kimberlite pipe, Yakutia.Doklady Earth Sciences, Vol. 476, 2, pp. 1155-1158.Russia, Yakutiadeposit - Udachnaya

Abstract: The crystallographic orientation of three diamonds and 19 olivine inclusions from Udachnaya kimberlite pipe was studied using monocrystal X-ray diffractometry. No epitaxial olivine inclusions were found.
DS201804-0673
2018
Sobolev, N.V.Biller, A.Ya., Logvinova, A.M., Babushkina, S.A., Oleynikov, O.B., Sobolev, N.V.Shrilankite inclusions in garnets from kimberlite bodies and Diamondiferous volcanic-sedimentary rocks of the Yakutian kimberlite province, Russia.Doklady Earth Sciences, Vol. 478, 1, pp. 15-19.Russia, Yakutiadeposit - Yubileinaya

Abstract: Pyrope-almandine garnets (Mg# = 28.3-44.9, Ca# = 15.5-21.3) from a heavy mineral concentrate of diamondiferous kimberlites of the largest diamond deposit, the Yubileinaya pipe, along with kimberlite- like rocks and diamondiferous volcano-sediments of the Laptev Sea coast, have been found to contain polymineral, predominantly acicular inclusions, composed of aggregates of shrilankite (Ti2ZrO6), rutile, ilmenite, clinopyroxene, and apatite. The presence of shrilankite as an inclusion in garnets from assumed garnet-pyroxene rocks of the lower crust, lifted up by diamond-bearing kimberlite, allows it to be considered as an indicator mineral of kimberlite, which expands the possibilities when searching for kimberlite in the Arctic.
DS201804-0739
2018
Sobolev, N.V.Sobolev, N.V.Inclusions in Siberian diamonds and their polycrystalline aggregates and specific features of orogenic diamonds from Kazkhstan.4th International Diamond School: Diamonds, Geology, Gemology and Exploration Bressanone Italy Jan. 29-Feb. 2nd., pp. 41-42. abstractRussiadiamond inclusions
DS201806-1212
2018
Sobolev, N.V.Bataleva, Yu.V., Palyanov, Yu.N., Borzdov, Yu.N., Zdrokov, E.V., Novoselov, I.D., Sobolev, N.V.Formation of the Fe, Mg-silicates, FeO, and graphite ( diamond) assemblage as a result of cohenite oxidation under lithospheric mantle conditions.Doklady Earth Sciences, Vol. 479, 1, pp. 335-338.Mantlegraphite

Abstract: Experimental studies in the Fe3C-SiO2-MgO system (P = 6.3 GPa, T = 1100-1500°C, t = 20-40 h) have been carried out. It has been established that carbide-oxide interaction resulted in the formation of Fe-orthopyroxene, graphite, wustite, and cohenite (1100 and 1200°C), as well as a Fe-C-O melt (1300-1500°C). The main processes occurring in the system at 1100 and 1200°C are the oxidation of cohenite, the extraction of carbon from carbide, and the crystallization of metastable graphite, as well as the formation of ferrosilicates. At T = 1300°C, graphite crystallization and diamond growth occur as a result of the redox interaction of a predominantly metallic melt (Fe-C-O) with oxides and silicates. The carbide-oxide interaction studied can be considered as the basis for modeling a number of carbon-producing processes in the lithospheric mantle at fO2 values near the iron-wustite buffer.
DS201809-2064
2018
Sobolev, N.V.Logvinova, A.M., Babushkina, S.A., Oleynikov, O.B., Sobolev, N.V.Shrilankite inclusions in garnets from kimberlite bodies and Diamondiferous volcanic sedimentary rocks of the Yakutian kimberlite province.Doklady Earth Sciences, Vol. 478, 1, pp. 15-19.Russiadiamond inclusions

Abstract: Pyrope-almandine garnets (Mg# = 28.3-44.9, Ca# = 15.5-21.3) from a heavy mineral concentrate of diamondiferous kimberlites of the largest diamond deposit, the Yubileinaya pipe, along with kimberlite- like rocks and diamondiferous volcano-sediments of the Laptev Sea coast, have been found to contain polymineral, predominantly acicular inclusions, composed of aggregates of shrilankite (Ti2ZrO6), rutile, ilmenite, clinopyroxene, and apatite. The presence of shrilankite as an inclusion in garnets from assumed garnet-pyroxene rocks of the lower crust, lifted up by diamond-bearing kimberlite, allows it to be considered as an indicator mineral of kimberlite, which expands the possibilities when searching for kimberlite in the Arctic.
DS201812-2778
2018
Sobolev, N.V.Bataleva, Yu.V., Palyanov, Yu.N., Borzdov, Yu.M., Novoselov, I.D., Bayukov, O.A., Sobolev, N.V.Conditions of formation of iron-carbon melt inclusions in garnet and orthopyroxene under P-T conditions of lithospheric mantle.Petrology, Vol. 26, 6, pp. 565-574.Mantleredox

Abstract: Of great importance in the problem of redox evolution of mantle rocks is the reconstruction of scenarios of alteration of Fe0- or Fe3C-bearing rocks by oxidizing mantle metasomatic agents and the evaluation of stability of these phases under the influence of fluids and melts of different compositions. Original results of high-temperature high-pressure experiments (P = 6.3 GPa, T = 13001500°?) in the carbideoxidecarbonate systems (Fe3CSiO2(Mg,Ca)CO3 and Fe3CSiO2Al2O3(Mg,Ca)CO3) are reported. Conditions of formation of mantle silicates with metallic or metalcarbon melt inclusions are determined and their stability in the presence of CO2-fluid representing the potential mantle oxidizing metasomatic agent are estimated. It is established that garnet or orthopyroxene and CO2-fluid are formed in the carbideoxidecarbonate system through decarbonation, with subsequent redox interaction between CO2 and iron carbide. This results in the formation of assemblage of Fe-rich silicates and graphite. Garnet and orthopyroxene contain inclusions of a FeC melt, as well as graphite, fayalite, and ferrosilite. It is experimentally demonstrated that the presence of CO2-fluid in interstices does not affect on the preservation of metallic inclusions, as well as graphite inclusions in silicates. Selective capture of FeC melt inclusions by mantle silicates is one of the potential scenarios for the conservation of metallic iron in mantle domains altered by mantle oxidizing metasomatic agents.
DS201812-2819
2018
Sobolev, N.V.Hwang, S.L., Shen, P., Yui, T.F., Chu, H.T., Logvinova, A.M., Sobolev, N.V.Low energy phase boundary pairs and preferred crystallographic orientations of olivines in nanometer-sized ultrapotassic fluid inclusions of Aykhal diamond.Lithos, Vol. 322, pp. 392-404.Russiadeposit - Aykhal

Abstract: The healed internal conjugated cleavages at the core of Aykhal octahedral diamond sample AH2 were decorated with {111}dia-facetted ultrapotassic fluid/melt inclusion pockets containing nanosized graphite, phlogopite and olivine (Fo92) inclusions. These olivines are either rounded in pockets with ample fluid, or facetted by the {111}dia mold in the pockets with a fluid film. Transmission electron microscopy revealed two distinct crystallographic characteristics of olivine inclusions: (1) pronounced crystallographic texture of olivines grouped in specific diamond domain, and (2) frequent parallelism or sub-parallelism of specific low-energy faces of the two phases, mainly (010)ol, {120}ol, (001)ol and {111}dia, {110}dia, {100}dia in the order of decreasing preference, forming prominent (010)ol/{111}dia, (010)ol/{110}dia, (001)ol/{110}dia, {120}ol/{111}dia, and {120}ol/{110}dia low-energy phase boundaries with thin liquid film of 1-2?nm in between. These findings not only testify to the extremely low adhesion energies of olivine-diamond boundary pairs, but also imply that, in the presence of a fluid phase, the interfacial energetics and the energetically favored crystallographic orientations of olivine inclusions in diamond can be controlled simply by the settlement/attachment of low-energy facets of olivine crystals precipitating from the parental fluid upon the low-energy {111}dia or {110}dia surfaces of diamond. Such interfacial energetics control and the resultant low-energy boundary pairs are characteristically distinct from the common topotaxy or epitaxy between oxide/silicate mineral pairs, but are in a sense like the Van der Waals heteroepitaxy in artificial systems.
DS201901-0006
2018
Sobolev, N.V.Bataleva, Yu.V., Palyanov, Yu.N., Borzdov, Yu.M., Bayukov, O.A., Sobolev, N.V.Experiment al modeling of Co forming processes involving cohenite and CO2 fluid in a silicate mantle.Doklady earth Sciences, Vol. 483, 1, pp. 1427-1430.Mantlepetrology

Abstract: Experimental studies were performed in the Fe3C-SiO2-(Mg,Ca)CO3 system (6.3 GP?, 1100-1500°C, 20-40 h). It is established that the carbide-oxide-carbonate interaction leads to the formation of ferrosilite, fayalite, graphite, and cohenite (1100 and 1200°?), as well as a Fe-C melt (1300°?). It is determined that the main processes in the system are decarbonation, redox-reactions of cohenite and a CO2-fluid, extraction of carbon from carbide, and crystallization of metastable graphite (± diamond growth), as well as the formation of ferriferous silicates. The interaction studied can be considered as a simplified model of the processes that occur during the subduction of oxidized crustal material to reduced mantle rocks.
DS201901-0007
2018
Sobolev, N.V.Bataleva, Yu.V., Palyanov, Yu.N., Borzdov, Yu.M., Novoselov, I.D., Bayukov, O.A., Sobolev, N.V.Conditions of formation of iron-carbon melt inclusions in garnet and orthopyroxene under P-T conditions of lithospheric mantle.Petrology, Vol. 26, 6, pp. 565-574.Mantlemetasomatism

Abstract: Of great importance in the problem of redox evolution of mantle rocks is the reconstruction of scenarios of alteration of Fe°- or Fe3C-bearing rocks by oxidizing mantle metasomatic agents and the evaluation of stability of these phases under the influence of fluids and melts of different compositions. Original results of high-temperature high-pressure experiments (P = 6.3 GPa, T = 1300-1500°?) in the carbide-oxide-carbonate systems (Fe3C-SiO2-(Mg,Ca)CO3 and Fe3C-SiO2-Al2O3-(Mg,Ca)CO3) are reported. Conditions of formation of mantle silicates with metallic or metal-carbon melt inclusions are determined and their stability in the presence of CO2-fluid representing the potential mantle oxidizing metasomatic agent are estimated. It is established that garnet or orthopyroxene and CO2-fluid are formed in the carbide-oxide-carbonate system through decarbonation, with subsequent redox interaction between CO2 and iron carbide. This results in the formation of assemblage of Fe-rich silicates and graphite. Garnet and orthopyroxene contain inclusions of a Fe-C melt, as well as graphite, fayalite, and ferrosilite. It is experimentally demonstrated that the presence of CO2-fluid in interstices does not affect on the preservation of metallic inclusions, as well as graphite inclusions in silicates. Selective capture of Fe-C melt inclusions by mantle silicates is one of the potential scenarios for the conservation of metallic iron in mantle domains altered by mantle oxidizing metasomatic agents.
DS201901-0096
2018
Sobolev, N.V.Zhimulev, E.I., Chepurov, A.I., Sobolev, N.V.Genesis of diamond in metal-carbon and metal-sulfur carbon melts: evidence from experimental data. ( light yellow and colorless diamond)Doklady earth Sciences, Vol. 483, 1, pp. 1473-1474.Mantlemelting

Abstract: The experimental data on diamond growth in the Fe-Ni-S-C and Fe-S-C systems with a sulfur content of 5-14 wt % at 5.5 GPa and 1300-1350°C are reported. Colorless and light yellow diamond crystals with a weight of 0.1-0.8 ct were synthesized. It is shown in the Fe-S-C system that at 5.5. GPa diamond may crystallize in a very narrow temperature range, from 1300 to 1370°C. Based on comparative analysis of the experimental data and the results of the study of native iron inclusions in natural diamonds from kimberlite pipes, it is suggested that diamond genesis may be partly controlled by the pre-eutectic (by the concentration of sulfur in relation to metal) metal-sulfide melt.
DS201907-1559
2019
Sobolev, N.V.Logvinova, A.M., Shatskiy, A., Wirth, R., Tomilenko, A.A., Ugapeva, S.S., Sobolev, N.V.Carbonatite melt in type Ia gem diamond.Lithos, in press available, 17p.Russiadeposit - Sytykanskaya

Abstract: Monocrystalline type Ia diamonds with octahedral growth morphology prevail among lithospheric diamonds, including precious stones. Unlike less common ‘fibrous’ diamonds that grew from alkali-rich carbonate-bearing melts and fluids, the growth medium of ‘monocrystalline’ type Ia diamonds remains debatable. Here we report the first finding of an optically visible (~30?µm in size) carbonate inclusion in the center of a gem type Ia octahedral diamond from the Sytykanskaya kimberlite pipe, Yakutia. We found that the inclusion consists of submicron size carbonate phases represented by K2Ca(CO3)2 bütschliite (~15?vol%), Na2Mg(CO3)2 eitelite (~5?vol%), and dolomite (~80?vol%). Although neither bütschliite nor eitelite can coexist with dolomite under mantle P-T conditions, these phases readily appear all together in the quenched products of carbonatite melt under mantle pressures. Thus, at the moment of capture, the inclusion material was a carbonatite melt with the following composition 10(K0.75Na0.25)2CO3·90(Ca0.57Mg0.43)CO3. The content of alkali carbonates at the level of 10?mol% indicates that the melt was formed at a temperature of =1300?°C. The high K/Na and Ca/(Ca?+?Mg) ratios in this melt indicate its derivation by partial melting of recycled marine sediments (pelites). Considering an age of the last subduction event beneath the Siberian craton, our new finding implies that subducting slabs drag carbonated material of the continental crust beneath ancient cratons, where it experiences partial melting to form a potassic dolomitic melt responsible for the formation of most diamonds, since the Late Archean.
DS201908-1797
2019
Sobolev, N.V.Murri, M., Smith, R.L., McColl, K., Hart, M., Alvaro, M., Jones, A.P., Nemeth, P., Salzmann, C.G., Cora, F., Domeneghetti, M.C., Nestola, F., Sobolev, N.V., Vishnevsky, S.A., Logvinova, A.M., McMillan, P.F.Quantifying hexagonal stacking in diamond. ( lonsdaleite)Nature Scientific Reports, doi.org/10.1038/ s41598-019-46556-3 8p. PdfGlobaldiamond morphology, impact craters

Abstract: Diamond is a material of immense technological importance and an ancient signifier for wealth and societal status. In geology, diamond forms as part of the deep carbon cycle and typically displays a highly ordered cubic crystal structure. Impact diamonds, however, often exhibit structural disorder in the form of complex combinations of cubic and hexagonal stacking motifs. The structural characterization of such diamonds remains a challenge. Here, impact diamonds from the Popigai crater were characterized with a range of techniques. Using the MCDIFFaX approach for analysing X-ray diffraction data, hexagonality indices up to 40% were found. The effects of increasing amounts of hexagonal stacking on the Raman spectra of diamond were investigated computationally and found to be in excellent agreement with trends in the experimental spectra. Electron microscopy revealed nanoscale twinning within the cubic diamond structure. Our analyses lead us to propose a systematic protocol for assigning specific hexagonality attributes to the mineral designated as lonsdaleite among natural and synthetic samples.
DS201909-2060
2019
Sobolev, N.V.Logvinova, A.M., Shatskiy, A., Wirth, R., Tomilenko, A.A., Ugapeva, S.S., Sobolev, N.V.Carbonatite melt in type Ia gem diamond. Lithos, Vol. 342-343, pp. 463-467.Russiadeposit - Sytykanskaya

Abstract: Monocrystalline type Ia diamonds with octahedral growth morphology prevail among lithospheric diamonds, including precious stones. Unlike less common ‘fibrous’ diamonds that grew from alkali-rich carbonate-bearing melts and fluids, the growth medium of ‘monocrystalline’ type Ia diamonds remains debatable. Here we report the first finding of an optically visible (~30?µm in size) carbonate inclusion in the center of a gem type Ia octahedral diamond from the Sytykanskaya kimberlite pipe, Yakutia. We found that the inclusion consists of submicron size carbonate phases represented by K2Ca(CO3)2 bütschliite (~15?vol%), Na2Mg(CO3)2 eitelite (~5?vol%), and dolomite (~80?vol%). Although neither bütschliite nor eitelite can coexist with dolomite under mantle P-T conditions, these phases readily appear all together in the quenched products of carbonatite melt under mantle pressures. Thus, at the moment of capture, the inclusion material was a carbonatite melt with the following composition 10(K0.75Na0.25)2CO3·90(Ca0.57Mg0.43)CO3. The content of alkali carbonates at the level of 10?mol% indicates that the melt was formed at a temperature of =1300?°C. The high K/Na and Ca/(Ca?+?Mg) ratios in this melt indicate its derivation by partial melting of recycled marine sediments (pelites). Considering an age of the last subduction event beneath the Siberian craton, our new finding implies that subducting slabs drag carbonated material of the continental crust beneath ancient cratons, where it experiences partial melting to form a potassic dolomitic melt responsible for the formation of most diamonds, since the Late Archean.
DS201910-2287
2019
Sobolev, N.V.Mikhailenko, D.S., Korsakov, A.V., Rezvukhina, O.V., Golovin, A.V., Sobolev, N.V.A find of coesite in diamond bearing kyanite eclogite from the Udachnaya kimberlite pipe, Siberian craton.Doklady Earth Sciences, Vol. 487, 2, pp. 925-928.Russia, Siberiadeposit - Udachnaya

Abstract: A find of coesite in a kyanite graphite-diamond-bearing eclogite xenolith from the Udachnaya-Vostochnaya kimberlite pipe is described in this paper. The coesite relics were found in intensely fractured garnet indicating some influence of the kimberlite melt, which is supported by the typical secondary mineral assemblage around this inclusion. These data indicate that shallower diamond-free coesite-grade rocks (2.7 GPa) underwent metamorphism distinct from diamond-bearing coesite eclogites (=4 GPa). The metasomatic alteration of rock as a result of the C-O-H fluid-rock interaction during diamond crystallization may be another possible reason for the absence of coesite in diamond-bearing xenoliths.
DS201910-2288
2019
Sobolev, N.V.Nestola, F., Zaffiro, G., Mazzucchelli, M.L., Nimis, P., Andreozzi, G.B., Periotto, B., Princivalle, F., Lenaz, D., Secco, L., Pasqualetto, L., Logvinova, A.M., Sobolev, N.V., Lorenzetti, A., Harris, J.W.Diamond inclusion system recording old deep lithosphere conditions at Udachnaya ( Siberia).Nature Research, Vol. 9, 12586 8p. PdfRussia, Siberiadeposit - Udachnaya

Abstract: Diamonds and their inclusions are unique fragments of deep Earth, which provide rare samples from inaccessible portions of our planet. Inclusion-free diamonds cannot provide information on depth of formation, which could be crucial to understand how the carbon cycle operated in the past. Inclusions in diamonds, which remain uncorrupted over geological times, may instead provide direct records of deep Earth’s evolution. Here, we applied elastic geothermobarometry to a diamond-magnesiochromite (mchr) host-inclusion pair from the Udachnaya kimberlite (Siberia, Russia), one of the most important sources of natural diamonds. By combining X-ray diffraction and Fourier-transform infrared spectroscopy data with a new elastic model, we obtained entrapment conditions, Ptrap?=?6.5(2) GPa and Ttrap?=?1125(32)-1140(33) °C, for the mchr inclusion. These conditions fall on a ca. 35?mW/m2 geotherm and are colder than the great majority of mantle xenoliths from similar depth in the same kimberlite. Our results indicate that cold cratonic conditions persisted for billions of years to at least 200?km in the local lithosphere. The composition of the mchr also indicates that at this depth the lithosphere was, at least locally, ultra-depleted at the time of diamond formation, as opposed to the melt-metasomatized, enriched composition of most xenoliths.
DS201911-2559
2019
Sobolev, N.V.Schmitt, A.K., Zack, T., Kooijman, E., Logvinova, A.M., Sobolev, N.V.U-Pb ages of rare rutile inclusions in diamond indicate entrapment synchronous with kimberlite formation. MirLithos, in press available, 47p. PdfRussiadeposit - Mir
DS202008-1379
2020
Sobolev, N.V.Chepurov, A.I., Tomilenko, A.A., Sonin, V.M., Zhimulev, E.I., Bulbak, T.A., Cheperov, A.A., Sobolev, N.V.Interaction of an Fe-Ni melt with anthracene ( C14H10) in the presence of olivine at 3 Gpa: fluid phase composition.Doklady Earth Sciences, Vol. 492, pp. 333-337.MantleUHP, diamond

Abstract: The first results on the interaction between an Fe-Ni melt and anthracene (?14?10) in the presence of olivine at 3 GPa and 1500°? and on the study of the component composition of the fluid generated in this process are presented. The stability of aliphatic hydrocarbons in the implemented conditions is confirmed experimentally. It is established that, under these conditions, crystallization of high-magnesian olivines occurs (Fo = 97-98 mol %). The composition of the fluid is similar to the composition of the fluid from inclusions in synthetic diamonds. The conditions implemented in the experiment might have occurred at the early stages of the Earth’s evolution.
DS202011-2029
2001
Sobolev, N.V.Ashchepkov, I.V., Afanasiev, V.P., Pokhilenko, N.P., Sobolev, N.V., Vladykin, N.V., Saprykin, A.I., Khmelnikova, O.S., Anoshin, G.N.Small note on the composition of Brazilian mantle. *** NOTE DATERevista Brasileira de Geociencas*** ENG, Vol. 31, 4, pp. 653-660. pdfSouth America, Brazilkimberlites

Abstract: Garne ts from couc eru ratc from the vargcm l kimberl ite pipe show a long compos itional range and reveallong lincar tre nds within the lherzolite field in a Cr~Ol - CaO% dia gram (Sobolcv et til. 1974) (lip (0 11% MgO). fon ned by grains of different dimensions with fcw deviations to harzburg itcs . Larger grains (fraction +3) arc higher in CaO with less Cr~01 (to 5.5%). TIle Cr20 1 freq uen cy reduc es in hyperbo lic function for each fraction . IImenites reve;1142-56% Ti0 2l..'Olllpositionai range with linear FeO - MgO correhuions but 3(4) separate groups for A I ~01 suggest different proport ion of co-prccipimted gimlet , probably due to polybn ric Irncnonanon. lncreasing Cr~O l nnd r"t..-Q% conte nt (fractionation uegn:e ) with red ucing TiO~ is in accord with Ar c mod el.. Ganict xenolith fnnnldnin II pipe with large Ga r- Cpxgrains and fine Mica-Curb bearing mat rix refer to 60 kbcr and 35 mv/m2 gcothcrm . 11displays enr iched trace c lement pat ter ns but not completely equilibrated compositions for Ga r anti Cpx. sugges ting low degree me lting of rela tively fertile mantle. St udied uuuc rinlmay s uggcsrmcrasomu tized, relat ively fertile and irre gularly heated mantle bene ath Sombcrn Bra zil as found by (Carvalho & Lccnnrdos 1997).
DS202011-2054
2020
Sobolev, N.V.Murri, M., Smith, R.L., McColl, K., Hart, M., Alvaro, M., Jones, A.P., Nemeth, P., Salzmann, C.G., Cora, F., Domeneghetti, M.C., Nestola, F., Sobolev, N.V., Vishnevsky, S.A., Logvinova, A.M., McMillan, P.F.Quantifying hexagonal stacking in diamond.Nature/scientific reports, 8p. PdfGlobalcrystallography

Abstract: Diamond is a material of immense technological importance and an ancient signifier for wealth and societal status. In geology, diamond forms as part of the deep carbon cycle and typically displays a highly ordered cubic crystal structure. Impact diamonds, however, often exhibit structural disorder in the form of complex combinations of cubic and hexagonal stacking motifs. The structural characterization of such diamonds remains a challenge. Here, impact diamonds from the Popigai crater were characterized with a range of techniques. Using the MCDIFFaX approach for analysing X-ray diffraction data, hexagonality indices up to 40% were found. The effects of increasing amounts of hexagonal stacking on the Raman spectra of diamond were investigated computationally and found to be in excellent agreement with trends in the experimental spectra. Electron microscopy revealed nanoscale twinning within the cubic diamond structure. Our analyses lead us to propose a systematic protocol for assigning specific hexagonality attributes to the mineral designated as lonsdaleite among natural and synthetic samples.
DS202102-0213
2021
Sobolev, N.V.Palyanov, Y.N., Borzdov, Y.M., Sokol, A.G., Btaaleva, Y.V., Kupriyanov, I.N., Reitsky, V.N., Wiedenbeck, M., Sobolev, N.V.Diamond formation in an electric field under deep Earth conditions.Science Advances, Vol. 7, 4, eabb4644 doi: 10.1126/ sciadv.abb4644 28p. PdfMantlegeophysics

Abstract: Most natural diamonds are formed in Earth’s lithospheric mantle; however, the exact mechanisms behind their genesis remain debated. Given the occurrence of electrochemical processes in Earth’s mantle and the high electrical conductivity of mantle melts and fluids, we have developed a model whereby localized electric fields play a central role in diamond formation. Here, we experimentally demonstrate a diamond crystallization mechanism that operates under lithospheric mantle pressure-temperature conditions (6.3 and 7.5 gigapascals; 1300° to 1600°C) through the action of an electric potential applied across carbonate or carbonate-silicate melts. In this process, the carbonate-rich melt acts as both the carbon source and the crystallization medium for diamond, which forms in assemblage with mantle minerals near the cathode. Our results clearly demonstrate that electric fields should be considered a key additional factor influencing diamond crystallization, mantle mineral-forming processes, carbon isotope fractionation, and the global carbon cycle.
DS202104-0591
2021
Sobolev, N.V.Malkovets, V.G., Shatsky, V.S., Dak, A.I., Gibsher, A.A., Yakovlev, I.V., Belousova, E.A., Tsujimori, T., Sobolev, N.V.Evidence for multistage and polychronous alkaline-ultrabasic Mesozoic magmatism in the area of diamondiferous placers of the Ebelyakh River basin, ( eastern slope of the Anabar shield).Doklady Earth Sciences, Vol. 496, 1, pp. 48-52.Russiadeposit - Anabar

Abstract: New mineralogical and isotope-geochemical data for zircon megacrysts (n = 48) from alluvium of Kholomolokh Creek (a tributary of the Ebelakh River) are reported. Using the geochemical classification schemes, the presence of zircons of kimberlitic and carbonatitic genesis was shown. The U-Pb dating of zircons revealed two major age populations: the Triassic (258-221 Ma, n = 18) and Jurassic (192-154 Ma, n = 30). Weighted mean 206Pb/238U ages allowed us to distinguish the following age stages: 155 ± 3, 161 ± 2, 177 ± 1.5, 183 ± 1.5, 190 ± 2, 233 ± 2.5, and 252 ± 4 Ma. It is suggested that the Ebelyakh diamonds could have been transported from the mantle depths by kimberlite, as well as by other related rocks, such as carbonatite, lamprophyre, lamproite, olivine melilitite, etc. Diamonds from the Ebelyakh placers most likely have polygenic native sources and may be associated with polychronous and multistage Middle Paleozoic and Mesozoic kimberlite and alkaline-ultrabasic magmatism in the eastern slope of the Anabar Shield (the Ebelyakh, Mayat, and Billyakh river basins).
DS202104-0594
2021
Sobolev, N.V.Mikhailenko, D.S., Korsakov, A.V., Ohfuji, H., Sobolev, N.V.Silicate inclusions in metamorphic diamonds from the ultra-high pressure Kokchetav complex, Kazakhstan.Doklady Earth Sciences, Vol. 496, pp. 142-145.Russia, Kazakhstandeposit - Kokchetav

Abstract: Mineral inclusions in cubic diamonds from garnet-clinopyroxene rock of the Kokchetav massif were studied. The coexistence of fluid and silicate inclusions in the central part of the diamond of the G0 sample was revealed by means of transmission electron microscopy. Silicate inclusions are represented by intergrowths of garnet and mica, which are spatially related with the carbonate and fluid inclusions. The first finding of silicate inclusions in the cubic diamonds from the UHP complex discovered over 50 years of their study is apparently due to a selective capture of the silicate minerals in the process of the diamond crystallization from the carbonate-bearing C-O-H fluid. The processes of diamond crystallization in the metamorphic deeply subducted rocks and upper mantle rocks, which are carried to the surface as xenoliths by kimberlite melts, have much in common.
DS1997-1075
1997
Sobolev, P.O.Sobolev, P.O., Rundquist, D.V.Change of seismicity in accordance with the stage of tectonic evolution Of the East African Rifts.Doklady Academy of Sciences, Vol. 355, No. 5, Jun-July pp. 664-68.Tanzania, KenyaTectonics, Rifting - gravity
DS202108-1270
2021
Sobolev, S.Baes, M., Sobolev, S., Gerya, T., Stern, R., Brune, S.Plate motion and plume-induced subduction inititation.Gondwana Research, Vol. 98, pp. 277-288. pdfSouth Americasubduction

Abstract: Impingement of a hot buoyant mantle plume head on the lithosphere is one of the few scenarios that can initiate a new subduction zone without requiring any pre-existing weak zones. This mechanism can start subduction and plate tectonics on a stagnant lid and can also operate during active plate tectonics where plume-lithosphere interactions is likely to be affected by plate motion. In this study, we explore the influence of plate motion on lithospheric response to plume head-lithosphere interaction including the effect of magmatic weakening of lithosphere. Using 3d thermo-mechanical models we show that the arrival of a new plume beneath the lithosphere can either (1) break the lithosphere and initiate subduction, (2) penetrate the lithosphere without subduction initiation, or (3) spread asymmetrically below the lithosphere. Outcomes indicate that lithospheric strength and plume buoyancy control plume penetration through the lithosphere whereas the plate speed has a subordinate influence on this process. However, plate motion may affect the geometry and dynamics of plume-lithosphere interaction by promoting asymmetry in the subduction zone shape. When a sufficiently buoyant plume hits a young but subductable moving lithosphere, a single-slab modern-style subduction zone can form instead of multiple subduction zones predicted by stagnant lid models. In the case of subduction initiation of older moving oceanic lithosphere, asymmetrical cylindrical subduction is promoted instead of more symmetrical stagnant lid subduction. We propose that the eastward motion of the Farallon plate in Late Cretaceous time could have played a key role in forming one-sided subduction along the southern and western margin of the Caribbean and NW South America.
DS1983-0110
1983
Sobolev, S.V.Artyushkov, E.V., Sobolev, S.V.Physics of Kimberlite Magmatism: AppendixAnnales Scientifiques De L' Universite De Clermont-ferrand Ii, No. 74, PP. 137-140.RussiaTechnical Caluculations
DS1984-0117
1984
Sobolev, S.V.Artyushkov, E.V., Sobolev, S.V.Physics of Kimberlite MagmatismProceedings of Third International Kimberlite Conference, Vol. 1, PP. 308-321.GlobalGenesis, Model, Diapir-crack
DS1987-0697
1987
Sobolev, S.V.Sobolev, S.V.Conditions of transport of plutonic xenolithsDoklady Academy of Science USSR, Earth Science Section, Vol. 297, No. 6, Nov-Dec., pp. 23-26RussiaXenoliths, Magma transport
DS1995-1795
1995
Sobolev, S.V.Sobolev, S.V., Widmer, R., Babeyko, A.Yu.3-D temperature and composition in the upper mantle constraint by global seismic tomography/mineral physicsProceedings of the Sixth International Kimberlite Conference Abstracts, pp. 561-563.MantleTomography, Geophysics -seismics
DS1996-1341
1996
Sobolev, S.V.Sobolev, S.V., Fuchs, K.Meeting of geophysics with kimberlites - preface editorialTectonophysics, Vol. 262, No. 1-4, Sept. 30, p.1.RussiaGeophysics
DS1996-1342
1996
Sobolev, S.V.Sobolev, S.V., Zeyen, H., et al.Upper mantle temperatures from teleseismic tomography of French massif central - composition, reactions, meltEarth and Planetary Science Letters, Vol. 140, pp. 147-163GlobalMantle tomography, Geophysics -seismics
DS2002-0850
2002
Sobolev, S.V.Kind, R., Yuan, X., Saul, J., Nelson, D., Sobolev, S.V., Mechie, J., Zhao, W.Seismic images of crust and upper mantle beneath Tibet: evidence for Eurasian plateScience, No. 5596, pp. 1219-1221.Mantle, ChinaGeophysics - seismics
DS2002-1617
2002
Sobolev, S.V.Trumbull, R.B., Sobolev, S.V., Bauer, K.Petrophysical modeling of high seismic velocity crust at the Namibian volcanic marginGeological Society of America Special Paper, No. 362, pp. 221-34.NamibiaGeophysics - seismics
DS2003-0085
2003
Sobolev, S.V.Bauer, K., Schukze, A., Ryberg, T., Sobolev, S.V., Weber, M.H.Classification of lithology from seismic tomography: a case study from the MessumJournal of Geophysical Research, Vol. 108, B3, 10.1029/2001JB001073.NamibiaGeophysics - seismics, Not specific to diamonds
DS2003-0812
2003
Sobolev, S.V.Li, X., Kind, R., Yuan, X., Sobolev, S.V., Hanka, W., Ramesh, D.S., Gu, Y.Seismic observation of narrow plumes in the oceanic upper mantleGeophysical Research Letters, Vol. 30, 6, p. 67. DOI10.1029/2002GLO15411MantlePlumes
DS2003-1394
2003
Sobolev, S.V.Trumbull, R.B., Sobolev, S.V., Bauer, K.Petrophysical modeling of high seismic velocity crust at the Namibian volcanic marginGeological Society of America Special Paper, No. 362, chapter 12.NamibiaMagmatism, Petrology
DS200412-1130
2003
Sobolev, S.V.Li, X., Kind, R., Yuan, X., Sobolev, S.V., Hanka, W., Ramesh, D.S., Gu, Y., Dziewonski, A.M.Seismic observation of narrow plumes in the oceanic upper mantle.Geophysical Research Letters, Vol. 30, 6, p. 67. DOI10.1029/2002 GLO15411MantleGeophysics - seismics Plumes
DS200412-2016
2002
Sobolev, S.V.Trumbull, R.B., Sobolev, S.V., Bauer, K.Petrophysical modeling of high seismic velocity crust at the Namibian volcanic margin.Geological Society of America Special Paper, No. 362, pp. 221-34.Africa, NamibiaGeophysics - seismics
DS200512-0235
2005
Sobolev, S.V.Dobolev, A.V., Hofmann, A.W., Sobolev, S.V., Nikogosian, I.K.An olivine free mantle source of Hawaiian shield basalts.Nature, No. 7033, March 31, pp. 590-597.Mantle, HawaiiGeochemistry
DS201012-0733
2009
Sobolev, S.V.Sobolev, A.V., Sobolev, S.V., Kuzmin, D.V., Malitch, K.N., Petrunin, A.G.Siberian meimechites: origin and relation to flood basalts and kimberlites.Russian Geology and Geophysics, Vol. 50, 12, pp. 999-1033.Russia, SiberiaMeimechite
DS201506-0261
2015
Sobolev, S.V.Dannberg, J., Sobolev, S.V.Low-bouyancy thermochemical plumes resolve controversy of classical mantle plume concept.Nature Communications, Vol. 6, 6960 DOI: 10.1038 /ncomms7960MantleMagmatism
DS201802-0220
2017
Sobolev, S.V.Baes, M., Sobolev, S.V.Mantle flow as a trigger for subduction initiation: a missing element of the Wilson Cycle concept.Geochemistry, Geophysics, Geosystems, Vol. 18, 12, pp. 4469-4486.Mantlesubduction

Abstract: The classical Wilson Cycle concept, describing repeated opening and closing of ocean basins, hypothesizes spontaneous conversion of passive continental margins into subduction zones. This process, however, is impeded by the high strength of passive margins, and it has never occurred in Cenozoic times. Here using thermomechanical models, we show that additional forcing, provided by mantle flow, which is induced by neighboring subduction zones and midmantle slab remnants, can convert a passive margin into a subduction zone. Models suggest that this is a long-term process, thus explaining the lack of Cenozoic examples. We speculate that new subduction zones may form in the next few tens of millions of years along the Argentine passive margin and the U.S. East Coast. Mantle suction force can similarly trigger subduction initiation along large oceanic fracture zones. We propose that new subduction zones will preferentially originate where subduction zones were active in the past, thus explaining the remarkable colocation of subduction zones during at least the last 400 Myr.
DS201806-1237
2018
Sobolev, S.V.Osei Tutu, A., Sobolev, S.V., Steinberger, B., Popov, A.A., Rogozhina, I.Evaluating the influence of plate boundary friction and mantle viscosity on plate velocities.Geochemistry, Geophysics, Geosystems, Vol. 19, 3, pp. 642-666.Mantlegeophysics - seismic
DS201907-1577
2019
Sobolev, S.V.Sobolev, S.V., Brown, M.Surface erosion events controlled the evolution of plate tectonics on Earth.Nature, Vol. 570, June 6, p. 52-57.Mantleplate tectonics

Abstract: Plate tectonics is among the most important geological processes on Earth, but its emergence and evolution remain unclear. Here we extrapolate models of present-day plate tectonics to the past and propose that since about three billion years ago the rise of continents and the accumulation of sediments at continental edges and in trenches has provided lubrication for the stabilization of subduction and has been crucial in the development of plate tectonics on Earth. We conclude that the two largest surface erosion and subduction lubrication events occurred after the Palaeoproterozoic Huronian global glaciations (2.45 to 2.2 billion years ago), leading to the formation of the Columbia supercontinent, and after the Neoproterozoic ‘snowball’ Earth glaciations (0.75 to 0.63 billion years ago). The snowball Earth event followed the ‘boring billion’—a period of reduced plate tectonic activity about 1.75 to 0.75 billion years ago that was probably caused by a shortfall of sediments in trenches—and it kick-started the modern episode of active plate tectonics.
DS1991-0472
1991
Sobolev, V.Fedorov, I.I., Chepurov, A.I., Osorgin, N.Y., Dokol, A.G., Sobolev, V.The experimental and thermodynamic modelling of C-O-H fluid in equilibrium with graphite and diamond at high pressuret parameters.(Russian)Doklady Academy of Sciences Akademy Nauk SSSR, (Russian), Vol. 320, No. 3, pp. 710-713RussiaExperimental mineralogy, Graphite, diamond
DS1993-0433
1993
Sobolev, V.Fedorov, I.I., Chepurov, A.I., Osorgin, N.Yu., Sokol, A.G., Sobolev, V.Experimental modeling and thermodydnamic analysis of C-O-H fluid in equilibrium with graphite and diamond at high pressures and temperatures.Doklady Academy of Sciences USSR, Earth Science Section, Vol. 321, No. 8, August 1993, pp. 163-166.Russia, Commonwealth of Independent States (CIS)Geothermometry, Graphite/diamond interface
DS1995-1727
1995
Sobolev, V.Shchukin, V.S., Sobolev, V., Larehence, V.A., Makhin, A.I.Geology of the diamond deposits in the Arkhangelsk region, RussiaSociety for Mining, Metallurgy and Exploration (SME) Meeting, Denver March 1995, abstractRussia, Commonwealth of Independent States (CIS), RussiaDiamond deposits
DS1975-0438
1976
Sobolev, V.K.Yermolenko, YU.P., Sobolev, V.K.Diamonds from Conglomerates of the Nadezhdin Suite Middle Devonian) of Northern Timan.Vyssh. Uchebn. Zaved. Izv. Geol. Razved., 1976, No. 12, PP. 159-161.RussiaBlank
DS1982-0574
1982
Sobolev, V.K.Sobolev, V.K., Stankovskiy, A.F.Carbonate Inclusions in Chrome Spinnellids from Kimberlite Sheets.Doklady Academy of Science USSR, Earth Science Section., Vol. 251, No. 6, PP. 140-141.RussiaXenoliths, Mineralogy
DS1983-0587
1983
Sobolev, V.K.Sobolev, V.K.Nature of Shells on Chrome Spinellid and Diamond Crystals from kimberlite.Doklady Academy of Sciences ACAD. NAUK USSR EARTH SCI. SECTION., Vol. 257, No. 1-6, PP. 148-151.RussiaDiamond, Genesis, Morphology, Crystallography
DS1983-0588
1983
Sobolev, V.K.Sobolev, V.K., Kiluev, I.A., et al.The Structural Typomorphism of North European Diamonds #1Doklady Academy of Sciences AKAD. NAUK SSSR., Vol. 269, No. 1, PP. 200-204.RussiaCrystallography
DS1983-0589
1983
Sobolev, V.K.Sobolev, V.K., Matsiuk, S.S.New Dat a on Titanian Pyropes in Connection with the Problem of Their Original Sources.Doklady Academy of Sciences AKAD. NAUK SSSR., Vol. 270, No. 5, PP. 1195-1198.RussiaGarnet, Mineralogy, Genesis
DS1984-0696
1984
Sobolev, V.K.Sobolev, V.K., Klyuyev, YU.A., et al.The Structural Typomorphism of North European Diamonds #2Doklady Academy of Science USSR, Earth Science Section., Vol. 269, No. 1-6, SEPTEMBER PP. 115-118.RussiaDiamond Morphology
DS1995-1728
1995
Sobolev, V.K.Shchukin, V.S., Sobolev, V.K., et al.Geology of the diamond deposit of the Arkhangelsk region of RussiaAmerican Institute of Mining, Metallurgical, and Petroleum Engineers (AIME) Preprint, No. 95-167, 12p.Russia, ArkangelskGeology, Deposit -Arkhangel
DS2002-0989
2002
Sobolev, V.K.Makeev, A.B., Kisel, S.I., Sobolev, V.K., Filippov, V.N., Bryanchaninova, N.I.Native metals in kimberlite pipe aureoles of the Arkhangelsk Diamondiferous provinceDoklady Earth Sciences, Vol. 385A, 6, pp. 714-8.Russia, Kola Peninsula, ArkangelskGeochemistry, Deposit - Arkangel area
DS1990-1387
1990
Sobolev, V.N.Sobolev, N.V., Mankenda, A., Kaminsky, F.V., Sobolev, V.N.Garnets from kimberlites of north-east Angola and relation of Their composition with diamond content.(Russian)Doklady Academy of Sciences Akademy Nauk SSSR, (Russian), Vol. 315, No. 5, pp. 1225-1229AngolaGarnets and diamonds, Mineralogy
DS1992-0485
1992
Sobolev, V.N.Fraracci, K.N., Taylor, L.A., Sobolev, N.V., Sobolev, V.N.Mineral chemistry of Diamondiferous eclogite xenoliths from the Mirkimberlite of the Yakutian kimberlite province, SiberiaGeological Society of America (GSA) Abstracts with programs, 1992 Annual, Vol. 24, No. 7, abstract p. A260Russia, Yakutia, SiberiaEclogites, Diamonds
DS1992-0786
1992
Sobolev, V.N.Jerde, E.A., Taylor, L.A., Crozaz, G., Sobolev, N.V., Sobolev, V.N.Diamondiferous eclogites from Yakutia Siberia: rare earth element evidence for a range of crustal protolithsGeological Society of America (GSA) Abstracts with programs, 1992 Annual, Vol. 24, No. 7, abstract p. A260Russia, YakutiaEclogites, Diamonds
DS1992-1448
1992
Sobolev, V.N.Sobolev, N.V., Mankenda, S.A., Kaminsky, F.V., Sobolev, V.N.Garnets from kimberlites of northeastern Angola and correlations between their compositions and diamond content.Doklady Academy of Sciences USSR, Earth Science Section, Vol. 315, pp. 238-242.AngolaGarnet mineralogy, Diamond content
DS1993-0750
1993
Sobolev, V.N.Jerde, E.A., Taylor, L.A., Crozaz, G., Sobolev, N.V., Sobolev, V.N.Diamondiferous eclogites from Yakutia, Siberia: evidence for a diversity ofprotolithsContribution to Mineralogy and Petrology, Vol. 114, No. 2, June pp. 189-202GlobalEclogites, Udachnaya pipe, chemistry, geobarometry
DS1994-1658
1994
Sobolev, V.N.Sobolev, V.N., Taylor, L.A., Snyder, G.A., Sobolev, N.V.Diamondiferous eclogites from the Udachnaya kimberlite pipe, YakutiaInternational Geology Review, Vol. 36, No. 1, Jan. pp. 42-64.Russia, YakutiaEclogites, Deposit -Udachnaya
DS1995-1796
1995
Sobolev, V.N.Sobolev, V.N., Taylor, L.A., Snyder et al.A unique metasomatised peridotite xenolith from the Siberian PlatformGeological Society of America (GSA) Abstracts, Vol. 27, No. 6, abstract p. A 48.Russia, SiberiaXenoliths, Metasomatism
DS1995-1797
1995
Sobolev, V.N.Sobolev, V.N., Taylor, L.A., Snyder, G.A., Sobolev, N.V.Diamondiferous eclogites from the Siberian Platform: samples with peridotitic signature? #2Proceedings of the Sixth International Kimberlite Conference Abstracts, pp. 552-554.Russia, SiberiaEclogites, Peridotites
DS1995-1798
1995
Sobolev, V.N.Sobolev, V.N., Taylor, L.A., Snyderm G.A.Diamondiferous eclogites and peridotites: are there petrogeneticrelationships?Geological Society of America (GSA) abstract, Vol. 27, No. 2, March p. 88.RussiaEclogites, Deposit -Mir
DS1995-1799
1995
Sobolev, V.N.Sobolev, V.N., Taylore, L.A., Snyder, G.A., PokhilenkoA unique metasomatised peridotite xenolith from the Mir kimberlite, Siberian PlatformProceedings of the Sixth International Kimberlite Conference Abstracts, pp. 555-557.Russia, SiberiaXenolith -peridotite, Deposit -Mir
DS1995-1878
1995
Sobolev, V.N.Taylor, L.A., Snyer, G.A., Sobolev, V.N.Trace element chemistry of eclogitic inclusions in diamond and comparisons with host eclogite, Mir.Proceedings of the Sixth International Kimberlite Conference Abstracts, pp. 625-627.Russia, YakutiaGeochemistry -eclogite, Deposit -Mir
DS1998-1375
1998
Sobolev, V.N.Sobolev, V.N., Taylor, L.A., Snyder, Jerde, NealMetasomatism of the mantle beneath Yakutia: a quantitative study of secondary chemistry and mineral..7th International Kimberlite Conference Abstract, pp. 835-7.Russia, YakutiaXenoliths, Deposit - Udachnaya
DS1999-0692
1999
Sobolev, V.N.Sobolev, N.V., Sobolev, V.N., Taylor, L.A.Significance of eclogitic and related parageneses of natural diamonds #1International Geology Review, Vol. 41, No. 2, Feb. pp. 129-40.Russia, YakutiaDiamond morphology, Eclogites, genesis
DS1999-0694
1999
Sobolev, V.N.Sobolev, V.N., Taylor, L.A., Sobolev, N.V.Quantifying the effects of metasomatism in mantle xenoliths: constraints from secondary chemistry ...International Geology Review, Vol. 41, No. 5, pp. 391-416.Russia, YakutiaMIneralogy, Geochemistry, eclogites, Deposit - Udachnaya
DS2000-0908
2000
Sobolev, V.N.Sobolev, N.V., Sobolev, V.N., Snyder, Yefimova, TaylorSignificance of eclogitic and related parageneses of natural diamonds #2Snyder, Neal, Ernst, Plan. Petrology and Geochemistry, pp. 15-26.GlobalDiamond - morphology, Diamond - genesis
DS1950-0084
1951
Sobolev, V.S.Sobolev, V.S.A Survey of the Geology of Diamond Deposits of Africa, Australia, Borneo and North America.Moskva: Gos. Izdat. Geol. Lit., 125P.South Africa, Australia, Borneo, United StatesGeology, Kimberley
DS1950-0325
1957
Sobolev, V.S.Buriv, A.P., Sobolev, V.S.Diamonds of SiberiaMoscow: Gosgeoltekhizdat., 158P.RussiaKimberlite
DS1950-0342
1957
Sobolev, V.S.Moor, G.G., Sobolev, V.S.The Problem of the Siberian KimberlitesMineral. Sb. L'vov Gos. University, No. 11, PP. 369-371.RussiaBlank
DS1960-0020
1960
Sobolev, V.S.Bobrievich, A.P., Smirnov, G.I., Sobolev, V.S.The Mineralogy of Xenoliths of a Grossularite Pyroxene Kyanite Rock from the Kimberlites of Yakutia.Geol. Series, Ussr, American Geological Institute Translation., No. 3, PP. 18-24.RussiaKimberlite
DS1960-0021
1960
Sobolev, V.S.Bobrievich, A.P., Smirnov, G.I., Sobolev, V.S.Eclogite Xenoliths With Diamond InclusionsDoklady Academy of Science USSR, Earth Science Section., Vol. 126, No. 1-6, PP. 581-583.RussiaKimberlite
DS1960-0218
1962
Sobolev, V.S.Bobrievich, A.P., Sobolev, V.S.Kimberlite Formations of the North Part of the Siberian Platform.In: The Petrography of The Ussr, PT. L, PP. 3L4-3L6.RussiaBlank
DS1960-0400
1963
Sobolev, V.S.Sobolev, V.S.Features of Volcanism of the Siberian PlatformPacific Science., Vol. 17, No. 4, PP. 452-457.RussiaDiatreme
DS1960-0500
1964
Sobolev, V.S.Sobolev, V.S., Sobolev, N.V.Xenoliths in the Kimberlites of Northern Yakutia. and Problems of the Structure of the Earth's Mantle.Doklady Academy of Science USSR, Earth Science Section., Vol. 158, PP. L08-LLL.RussiaBlank
DS1960-0604
1965
Sobolev, V.S.Sobolev, V.S., Sobolev, N.V.Xenoliths in Kimberlite of Northern Yakutia and the Structure of the Mantle.Doklady Academy of Science USSR, Earth Science Section., Vol. 158, No. 1-6, PP. 22-25.RussiaBlank
DS1960-0879
1967
Sobolev, V.S.Sobolev, V.S., Sobolev, N.V.Chromium and Chromium Bearing Minerals in Deep- Seated Xenoliths from Kimberlite Pipes.Geol. Rudn. Mestorozh., No. 9, PT. 2, PP. 10-16.RussiaBlank
DS1960-1213
1969
Sobolev, V.S.Sobolev, V.S.Kimberlite Genesis ProblemIavcei, Symposium Oxford., PP. 38-39.RussiaBlank
DS1960-1214
1969
Sobolev, V.S.Sobolev, V.S.Peridotites with Chromium Rich Garnets and Diamond Bearing Eclogites As the Most Deep Seated Xenoliths in Kimberlites.Iavcei, Symposium Oxford., PP. 45-47.RussiaBlank
DS1970-0603
1972
Sobolev, V.S.Sobolev, V.S., Sobolev, N.V., Lavrentyev, YU.G.Inclusions in Diamond from a Diamond Bearing EclogiteDoklady Academy of Sciences AKAD. NAUK SSSR., Vol. 207, PP. 164-167.RussiaDiamond Morphology
DS1970-0875
1974
Sobolev, V.S.Bakumenko, I.T., Sobolev, V.S.Inclusions in Minerals of Ultramafic Xenoliths from the Avacha Volcano.Doklady Academy of Science USSR, Earth Science Section., Vol. 218, No. 1-6, PP. 157-160.RussiaKimberlite
DS1975-0191
1975
Sobolev, V.S.Sobolev, V.S., Bazarova, T.YU., Yagi, K.Crystallization Temperatures of Wyomingite from Leucite HillContributions to Mineralogy and Petrology, Vol. 49, PP. 301-308.GlobalLeucite Hills, Leucite, Rocky Mountains
DS1975-0871
1978
Sobolev, V.S.Sobolev, V.S., Panina, L.I., Podgornikh, N.M.Crystallization Temperatures of Several Carbonatite Minerals from Siberia.I Symposio International De Carbonatitos, PP. 215-219.RussiaPetrology, Mineral Chemistry
DS1981-0388
1981
Sobolev, V.S.Sobolev, V.S., Sobolev, N.V.Yakut Diamonds: Scientific Problems Connected with Their Study.Journal of GEMMOLOGICAL SOCIETY of JAPAN., Vol. 8, No. 1-8, PP.RussiaBlank
DS1984-0692
1984
Sobolev, V.S.Sobolev, N.V., Efimova, E.S., Lavrentiev, I.G., Sobolev, V.S.Predominating Calc-silicate Association of Crystalline Inclusions in Diamonds from the South Australia Placers.Doklady Academy of Sciences AKAD. NAUK SSSR., Vol. 274, No. 1, PP. 172-179.Australia, South AustraliaAlluvial Diamond Deposits, Mineralogy
DS1985-0636
1985
Sobolev, V.S.Sobolev, N.V., Yefimova, E.S., Lavrentyev, YU.G., Sobolev, V.S.Dominant calc-silicate association of crystalline inclusions in placer diamonds from southeastern AustraliaDoklady Academy of Science USSR, Earth Science Section, Vol. 275, April pp. 148-152AustraliaNew South Wales, Diamond Morphology
DS200812-0905
2008
Sobolev, V.S.Pokhilenko, L.N., Pokhilenko, N.P., Fedorov, L.I., Tomilenko, A.A., Usova, L.V., Fomina, L.N., Sobolev, V.S.Fluid regime pecularities of the lithosphere mantle of the Siberian Platform.Deep Seated Magmatism, its sources and plumes, Ed. Vladykin, N.V., 2008 pp. 122-136.Russia, SiberiaMantle chemistry
DS201112-1150
2011
Sobolev, V.S.Zaitsev, A.N., Sharygin, V.V., Sobolev, V.S., Kamenetsky, V.S., Kamenetsky, M.B.Silicate carbonate liquid immiscibility in 1917 eruption nephelinite lavas, Oldoinyo Lengai volcano, Tanzania: melt inclusion study.Peralk-Carb 2011, workshop held Tubingen Germany June 16-18, PosterAfrica, TanzaniaCarbonatite
DS1986-0770
1986
Sobolev, V.V.Sobolev, V.V., Slobodskoy, V.Ya., Selyukov, S.N., Udoyev, A.A.Transformation of chaoite into other hydrocarbon phases.(Russian)Zapiski Vsesoy. Mineral. Obshchestva, (Russian), pp. 218-221RussiaBlank
DS1987-0698
1987
Sobolev, V.V.Sobolev, V.V.Diamond crystallization in natureCombust. Explos. Shock Waves, Vol. 23, No. 1, Jan-Feb pp. 83-86GlobalBlank
DS1987-0699
1987
Sobolev, V.V.Sobolev, V.V.Diamond crystallization in nature.(Russian)Fiz. Goreniya Vzryva, (Russian), Vol. 23, No. 1, pp. 91-95RussiaDiamond, Crystallography
DS1994-1659
1994
Sobolev, V.V.Sobolev, V.V.Crystallization of diamond particles in the interstellar mediumGeochemistry International, Vol. 31, No. 4, pp. 103-106.GlobalMeteorites, Diamond morphology
DS1993-1247
1993
Sobolev N.V.Pokhilenko, N.P., Sobolev N.V., Boyd, F.R., Pearson, D.G., Shimizum N.Megacrystalline pyrope peridotites in the lithosphere of the Siberianplatform: mineralogy, geochemical pecularities and the problem of their origin.Russian Geology and Geophysics, Vol. 34, No. 1, pp. 1-12.Russia, Commonwealth of Independent States (CIS), SiberiaPyrope peridotites, Siberian Platform, Geochemistry
DS1997-0346
1997
Soboleva, S.Ferraris, G., Khomyakov, A.P., Belluso, E., Soboleva, S.Polysomatic relationships in some titanosilicates occurring in the hyperagpaitic alkaline rocks Kola Pen.Proceedings 30th. I.G.C., Pt. 16, pp. 17-27.Russia, Kola PeninsulaAlkaline rocks
DS1982-0575
1982
Soboleva, S.V.Soboleva, S.V., et al.Characteristics of Phlogopite of Mantle OriginInternational Geology Review, Vol. 24, No. 1, PP. 35-40.RussiaObnazhennaya, Pyrope Garnet, Genesis
DS1990-1638
1990
Soboleva, S.V.Zinchuk, N.N., Soboleva, S.V., Kotelnikov, D.D., Antonyuk, B.P.Properties of layer silicates from kimberlite and host rocks in zones actively affected by trap magmatism (illustrated by Yakutia)Doklady Academy of Science USSR, Earth Science Section, Vol. 305, No. 2, Sept. pp. 160-162RussiaKimberlite, Skarns
DS2001-0698
2001
Sobolov, N.V.Logvinova, A.M., Zedgenizov, D.A., Sobolov, N.V.Pyroxenite paragenesis of abundant mineral and probable fluid inclusions in microdiamonds from Mir kimberliteDoklady Academy of Sciences, Vol. 380, No. 7, Sept-Oct. pp.795-800.Russia, SiberiaMineralogy - micro diamonds, Deposit - Mir
DS1991-1628
1991
Sobolyev, V.K.Sobolyev, V.K.The problem of primary source of Brasil type diamonds (the case history of discovery of diamond deposits in the Arkhangelsk region)Proceedings of Fifth International Kimberlite Conference held Araxa June 1991, Servico Geologico do Brasil (CPRM) Special, pp. 553-555RussiaPSSD (primary source of spheroidal diamonds), Diamond genesis
DS1982-0612
1982
Sobornov, O.P.Ukhanov, A.V., Sobornov, O.P., et al.Thorium and Uranium Contents in Kimberlites of Siberia and Africa Based on the Results of New Gamma Spectrometric Determinations.Geochemistry International (Geokhimiya)., No. 8, AUGUST, PP. 1204-1210.Russia, South AfricaMineral Chemistry
DS1987-0700
1987
Sobornov, O.P.Sobornov, O.P., Zolotukhina, T.M.Radio elements in standard samples pertaining to magmatic rocks included In the single system of the USSR state standard samplesGeostandard Newsletter, Vol. 11, No. 1, pp. 123-126RussiaAnorthorosite, harzburgite, kimberlite, Spectrometry
DS2000-0910
2000
Sobouti, F.Sobouti, F., Hamed, J.A.Thermo-mechanical modeling of subduction of continental lithosphereGeological Association of Canada (GAC)/Mineralogical Association of Canada (MAC) 2000, 2p. abstract.MantleGeodynamics, tectonics
DS2001-1098
2001
Sobouti, F.Sobouti, F., Ghods, A., Arkani-Hamed, J.On the advection of sharp material interfaces in geodynamic problems: entrainment of the D layer.Journal of Geodynamics, Vol. 31, No. 5, pp. 459-79.MantleConvection - chemistry
DS200812-0502
2008
Sobovlev, A.V.Ionov, D.A., Sobovlev, A.V.Geochemical fingerprinting of the lithospheric mantle using high precision olivine analyses.Goldschmidt Conference 2008, Abstract p.A410.MantleXenolith chemistry
DS1984-0697
1984
Sobzcak, L.W.Sobzcak, L.W., Overton, A.Shallow and deep crustal structure of the western Sverdrup Basin, ArcticCanada.Canadian Journal of Earth Sciences, Vol. 21, p. 902-19.Northwest TerritoriesGeophysics - Gravity
DS1950-0303
1956
Soc. International Forestiere Et Miniere Du CongoSoc. International Forestiere Et Miniere Du CongoHistory and Founding of Company into African AffairsBruxelles: L. Cuypers, 209P.Democratic Republic of Congo, Central AfricaKasai, Diamonds, Mining, Kimberley
DS1981-0245
1981
Sochneva, E.G.Konstantinovskiy, A.A., Sochneva, E.G., et al.Pyrope and Picroilmenite Finds in the Riphean Rocks of the Northern Part of the Siberian PlatformDoklady Academy of Science USSR, Earth Science Section., Vol. 247, No. 1-6, PP. 147-149.RussiaHeavy Minerals, Prospecting
DS1970-0604
1972
Sochurek, H.Sochurek, H.What It Is Like to Live in Siberia During WinterSmithsonian Magazine., Vol. 4, No. 10, PP. 44-52.RussiaBlank
DS1997-1076
1997
Societe GeneraleSociete GeneraleReunion Mining - performance outline Skorpion featured not diamondsSociete Generale Promotional, 12p.ZimbabweNews item - promotional, Reunion Mining PLC.
DS1860-0038
1867
Society Arts Journal of LondonSociety Arts Journal of LondonPrecious Stones at the Cape of Good HopeSociety Arts Journal of London, Vol. 15, Oct. 4TH., P. 703.Africa, South Africa, Griqualand West, Orange RiverAlluvial placers, History, Diamonds Notable
DS1860-0057
1868
Society Arts Journal of LondonSociety Arts Journal of LondonDiamonds at the Cape Colony. #2Society Arts Journal of London, Vol. 16, PP. 849-850; PP. 854-855; ALSO Vol. 17, P. 46.Africa, South AfricaCurrent Activities
DS1860-0194
1873
Society Arts Journal of LondonSociety Arts Journal of LondonCape Diamonds Vaal River, Waldreck's PlantSociety Arts Journal of London, Vol. 21, P. 155.Africa, South Africa, Cape ProvinceDiamonds Notable
DS1860-0241
1875
Society Arts Journal of LondonSociety Arts Journal of LondonNotes on Diamonds from the CapeSociety Arts Journal of London, Vol. 23, P. 930.Africa, South AfricaDiamond Occurrence
DS1998-1376
1998
Society for Mining, Metallurgy and Exploration (SME).Society for Mining, Metallurgy and Exploration (SME).Remediation of historical mine sites - technical summaries andbibliographySociety for Mining, Metallurgy and Exploration (SME)., 136p. $ 30.00GlobalBook - ad, Environment - remediation
DS1994-1660
1994
Society of Economic GeologistsSociety of Economic GeologistsAssays: conflict between quality and cost... forum reviewSeg Newsletter, No. 16, January pp. 16, 17GlobalGeochemistry, Sampling -assays
DS1996-1343
1996
Society of Economic GeologistsSociety of Economic GeologistsActivity in Norway at a low level... costs and rights of LappsSeg Newsletter, No. 26, July, p. 39.NorwayNews item, RTZ, Ashton, Monopros
DS1996-1344
1996
Society of Economic GeologistsSociety of Economic GeologistsNorthern Europe - exploration review... Alcastone Mining.. applying for diamond exploration in Sweden.Seg Newsletter, No. 26, July, p. 38.SwedenNews item, Alcastone Mining
DS1996-1345
1996
Society of Economic GeologistsSociety of Economic GeologistsMinish FIn land Oy (Ashton Mining) contesting Alcastone Mining applicationSeg Newsletter, No. 26, July, p. 38.SwedenNews item, Ashton Mining Ltd.
DS1996-1346
1996
Society of Economic GeologistsSociety of Economic GeologistsGeoforum AB, RTZ and NordEx AB all involved in exploration concessions...Seg Newsletter, No. 26, July, p. 38.SwedenNews item, Geoforum AB, RTZ, NordEX
DS200912-0709
2008
Society of Economic GeologistsSociety of Economic GeologistsDiamonds and kimberlites 1905-2007. All papers from Economic Geology issues.Society of Economic Geology, Compilation series CD rom $ 75.00 USGlobalDiamond papers
DS2003-1309
2003
Society of Economic Geologists University of Toronto Student ChapterSociety of Economic Geologists University of Toronto Student ChapterKimberlites and diamond exploration. Overview, petrography, mineral inclusionsSeg University Of Toronto Email , March 7,8th. 2 day $ 500.TorontoShort Course - diamond exploration
DS2000-0911
2000
Society of Exploration Geophysics Australia PreviewSociety of Exploration Geophysics Australia PreviewAdvances in seismic processing 1990-2000Seg Australia Preview, August pp. 17-26.GlobalGeophysics - seismics ( not specific to diamonds)
DS1993-1501
1993
Society of Mining Geologists of JapanSociety of Mining Geologists of JapanFerro-manganese depositsResource Geology of Japan, No. 17GlobalBook -table of contents, Ferro-manganese deposits
DS1910-0311
1912
Sodenstern, E. VON.Sodenstern, E. VON.Auf den Diamant feldern in Suedwest. Pomona und AnderesKol. Heimat., Vol. 6, No. 4, PP. 2-3.Southwest Africa, NamibiaDiamonds, Occurrences, Littoral Diamond Placers
DS1975-1231
1979
Soderberg, R.K.Soderberg, R.K., Keller, G.R., Braile, L.W., Hinze, W.J., et al.A Gravity and Tectonic Study of the Rough Creek Fault Zone And Related Features.National Technical Information Service NUREG CR/1014, PP. 134-164.GlobalMid Continent, New Madrid
DS1981-0389
1981
Soderberg, R.K.Soderberg, R.K., Keller, G.R.Geophysical Evidence for Deep Basin in Western KentuckyAmerican Association of Petroleum Geologists Bulletin., Vol. 65, PP. 226-234.GlobalMid-continent
DS201012-0077
2010
SoderlundBuchan, K.L., Ernst, R.E., Bleeker, W., Davis, W.J., Villeneuve, M., Van Breeman, O., Hamilton, SoderlundMap of Proterozoic magmatic events in the Slave Craton, Wopmay Orogen and environs, Canadian Shield.International Dyke Conference Held Feb. 6, India, 1p. AbstractCanada, Northwest TerritoriesMagmatism
DS2001-0538
2001
Soderlund, U.Johannsen, L., Moller, C., Soderlund, U.Geochronology of eclogite facies metamorphism in the Sveconorwegian Province of southwest Sweden.Precambrian Research, Vol. 106, No. 3-4, Mar. 1, pp. 261-76.SwedenEclogites
DS201012-0185
2010
Soderlund, U.Ernst, R.E., Bleeker, W., Soderlund, U., Hamilton, M.A., Sylvester, P.J., Chamberlain, K.R.Using the global dolerite dyke swarm record to reconstruct supercontinents back to 2.7 Ga.International Dyke Conference Held Feb. 6, India, 1p. AbstractGlobalPangea
DS201012-0236
2010
Soderlund, U.Gladkochub, D.P., Pisarevsky, S.A., Ernst, R., Donskaya, T.V., Soderlund, U., Mazukabzov, A.M., Hanes, J.Large igneous province of about 1750 Ma in the Siberian Craton.Doklady Earth Sciences, Vol. 430, 2, pp. 163-167.RussiaMagmatism
DS201012-0262
2010
Soderlund, U.Halls, H.C., Lovette, A., Soderlund, U., Hamilton, M.A.Paleomagnetism and U Pb geochronology from the western end of the Grenville dyke swarm and the question of true polar wander during the Ediacaran.International Dyke Conference Held Feb. 6, India, 1p. AbstractUnited States, CanadaAlkaline rocks, complexes
DS201312-0241
2013
Soderlund, U.El Bahat, A., Ikenne, M., Soderlund, U., Cousens, B., Youbi, N., Ernst, R., Soulaimani, A., El Janati, M., Hafid, A.U PB baddeleyite ages and geochemistry of dolerite dykes in the Bas Draa In lier of the Anti-Atlas of Morocco: newly identified Ma event in the West African craton.Lithos, Vol. 174, pp. 85-98.Africa, MoroccoGeochronology
DS201312-0248
2013
Soderlund, U.Ernst, R.E., Bleeker, W., Soderlund, U., Kerr, A.C.Large igneous provinces and supercontinents: toward completing the plate tectonic revolution.Lithos, Vol. 174, pp. 1-14.PangeaLIP
DS201312-0511
2013
Soderlund, U.Kouyate, D., Soderlund, U., Youbi, N., Ernst, R., Hafid, A., Ikeene, M., Soulaimani, A., Betrand, H., El Janati, M., Rkha, C.U Pb baddeleyite and zircon ages of 2040 Ma, 1650 Ma and 885 Ma on dolerites in the West African Craton ( Anti-Atlas inliers) : possible links to break up of Precambrian supercontinents.Lithos, Vol. 174, pp. 71-84.AfricaGeochronology
DS201312-0650
2013
Soderlund, U.Nilsson, M.K.M., Klausen, M.B., Soderlund, U., Ernst, R.E.Precise U Pb ages and geochemistry of Paleoproterozoic mafic dykes from southern West Greenland: linking the North Atlantic and the Dharwar cratons.Lithos, Vol. 174, pp. 255-270.Europe, Greenland, IndiaGeochronology
DS201312-0899
2013
Soderlund, U.Tait, J., Straathof, G., Soderlund, U., Ernst, R.E., Key, R., Jowitt, S.M., Lo, K., Dahmada, M.E.M., N'Diaya, O.The Ahmeyim Great Dyke of Mauritania: a newly dated Archean intrusion.Lithos, Vol. 174, pp. 323-332.Africa, MauritaniaGeochronology
DS201312-0999
2013
Soderlund, U.Youbi, N., Kouyate, D., Soderlund, U., Ernst, R.E., Soulaimani, A., Hafid, A., Ikenne, M., El Bahat, A., Betrand, H., Chaham, K.R., Ben Abbou, M., Mortaji, A., El Ghorfi, M., Zouhair, M., El Janati, M.The 1750 Ma magmatic event of the West African Craton ( Anti-Atlas) Morocco.Precambrian Research, Vol. 236, pp. 106-123.Africa, MoroccoDike swarms
DS201606-1084
2016
Soderlund, U.Evans, D.A.D., Trindade, R.I.F., Catelani, E.L., D'Agrella-Filho, Heaman, L.M., Oliveira, E.P., Soderlund, U., Ernst, R.E., Smirnovm A.V., Salminen, J.M.Return to Rodinia? Moderate to high paleolatitude of the Sao Francisco/Congo craton at 920 Ma.Geological Society of London Special Publication Supercontinent Cycles through Earth History., Vol. 424, pp. 167-190.South America, BrazilSupercontinents

Abstract: Moderate to high palaeolatitudes recorded in mafic dykes, exposed along the coast of Bahia, Brazil, are partly responsible for some interpretations that the São Francisco/Congo craton was separate from the low-latitude Rodinia supercontinent at about 1050 Ma. We report new palaeomagnetic data that replicate the previous results. However, we obtain substantially younger U-Pb baddeleyite ages from five dykes previously thought to be 1.02- 1.01 Ga according to the 40 Ar/ 39 Ar method. Specifically, the so-called 'A-normal' remanence direction from Salva-dor is dated at 924.2 + 3.8 Ma, within error of the age for the 'C' remanence direction at 921.5 + 4.3 Ma. An 'A-normal' dyke at Ilhéus is dated at 926.1 + 4.6 Ma, and two 'A-normal' dykes at Olivença have indistinguishable ages with best estimate of emplacement at 918.2 + 6.7 Ma. We attribute the palaeomagnetic variance of the 'A-normal' and 'C' directions to lack of averaging of geomagnetic palaeosecular variation in some regions. Our results render previous 40 Ar/ 39 Ar ages from the dykes suspect, leaving late Mesoproterozoic palaeolatitudes of the São Francisco/Congo craton unconstrained. The combined 'A-normal' palaeomagnetic pole from coastal Bahia places the São Francisco/Congo craton in moderate to high palaeolatitudes at c. 920 Ma, allowing various possible positions of that block within Rodinia. Despite more than two decades of intense global research, the configuration of Neoproterozoic supercontinent Rodinia remains enigmatic. Following the first global synthesis by Hoffman (1991), most models include a central location for Laurentia, flanked by 'East' Gondwana-Land cra-tons along its proto-Cordilleran margin and 'West'
DS201607-1295
2016
Soderlund, U.Ernst, R.E., Hamilton, M.A., Soderlund, U., Hanes, J.A., Gladkochub, D.P., Okrugin, A.V., Kolotilina, T., Mekhonoshin, A.S., Bleeker, W., LeCheminant, A.N., Buchan, K.L., Chamberlain, K.R., Didenko, A.N.Long lived connection between southern Siberia and northern Laurentia in the Proterozoic.Nature Geoscience, Vol. 9, 6, pp. 464-469.Canada, RussiaProterozoic

Abstract: Precambrian supercontinents Nuna-Columbia (1.7 to 1.3 billion years ago) and Rodinia (1.1 to 0.7 billion years ago) have been proposed. However, the arrangements of crustal blocks within these supercontinents are poorly known. Huge, dominantly basaltic magmatic outpourings and intrusions, covering up to millions of square kilometres, termed Large Igneous Provinces, typically accompany (super) continent breakup, or attempted breakup and offer an important tool for reconstructing supercontinents. Here we focus on the Large Igneous Province record for Siberia and Laurentia, whose relative position in Nuna-Columbia and Rodinia reconstructions is highly controversial. We present precise geochronology—nine U -Pb and six Ar -Ar ages—on dolerite dykes and sills, along with existing dates from the literature, that constrain the timing of emplacement of Large Igneous Province magmatism in southern Siberia and northern Laurentia between 1,900 and 720 million years ago. We identify four robust age matches between the continents 1,870, 1,750, 1,350 and 720 million years ago, as well as several additional approximate age correlations that indicate southern Siberia and northern Laurentia were probably near neighbours for this 1.2-billion-year interval. Our reconstructions provide a framework for evaluating the shared geological, tectonic and metallogenic histories of these continental blocks.
DS201612-2350
2016
Soderlund, U.Youbi, N., Ernst, R.E., Soderlund, U., Boumehdi, M.A., Bensalah, M.K., Aarab, E.M.Morocco, North Africa: a dyke swarm bonanza.Acta Geologica Sinica, Vol. 90, July abstract p. 15.Africa, MoroccoDykes
DS201805-0952
2017
Soderlund, U.Ikenne, M., Lahna, A.A., Soderlund, U., Tassinar, C.C.G., Ernst, R.E., Pin, Ch., Youbi, N., El Aouli, EH., Hafid, A., Admou, H., Mata, J., Bouougri, EH., Boumehdi, M.A.New Mesoproterozoic age constraints for the Taghdout Group, Anti-Atlas ( Morocco): toward a new lithostratigra[hic framework for the Precambrian in the NW margin of the West African Craton.The First West African Craton and Margins International Workshop WACMA, Held Apr. 24-29. 1p. AbstractAfrica, Moroccogeochronology
DS201811-2605
2018
Soderlund, U.Salminen, J., Hanson, R., Evans, D.A.D., Gong, Z., Larson, T., Walker, O., Gumsley, A., Soderlund, U., Ernst, T.Direct Mesoproterozoic connection of the Congo and Kalahari cratons in proto-Africa: strange attractors across supercontinental cycles.Geology, doi.org/10.1130/G45294.1 4p.Africacraton

Abstract: Mobilistic plate-tectonic interpretation of Precambrian orogens requires that two conjoined crustal blocks may derive from distant portions of the globe. Nonetheless, many proposed Precambrian cratonic juxtapositions are broadly similar to those of younger times (so-called “strange attractors”), raising the specter of bias in their construction. We evaluated the possibility that the Congo and Kalahari cratons (Africa) were joined together prior to their amalgamation along the Damara-Lufilian-Zambezi orogen in Cambrian time by studying diabase dikes of the Huila-Epembe swarm and sills in the southern part of the Congo craton in Angola and in Namibia. We present geologic, U-Pb geochronologic, and paleomagnetic evidence showing that these two cratons were directly juxtaposed at ca. 1.1 Ga, but in a slightly modified relative orientation compared to today. Recurring persistence in cratonic connections, with slight variations from one supercontinent to the next, may signify a style of supercontinental transition similar to the northward motion of Gondwana fragments across the Tethys-Indian oceanic tract, reuniting in Eurasia.
DS201811-2609
2018
Soderlund, U.Stark, J.C., Wilde, S.A., Soderlund, U., Li, Z-X., Rasmussen, B., Zi, J-W.First evidence of Archean mafic dykes at 2.62 Ga in the Yilgarn Craton, Western Australia: links to cratonisation and the Zimbabwe craton.Precambrian Research, Vol. 317, pp. 1-13.Australia, Africa, Zimbabwecraton

Abstract: The Archean Yilgarn Craton in Western Australia hosts at least five generations of Proterozoic mafic dykes, the oldest previously identified dykes belonging to the ca. 2408-2401?Ma Widgiemooltha Supersuite. We report here the first known Archean mafic dyke dated at 2615?±?6?Ma by the ID-TIMS U-Pb method on baddeleyite and at 2610?±?25?Ma using in situ SHRIMP U-Pb dating of baddeleyite. Aeromagnetic data suggest that the dyke is part of a series of NE-trending intrusions that potentially extend hundreds of kilometres in the southwestern part of the craton, here named the Yandinilling dyke swarm. Mafic magmatism at 2615?Ma was possibly related to delamination of the lower crust during the final stages of assembly and cratonisation, and was coeval with the formation of late-stage gold deposit at Boddington. Paleogeographic reconstructions suggest that the Yilgarn and Zimbabwe cratons may have been neighbours from ca. 2690?Ma to 2401?Ma and if the Zimbabwe and Kaapvaal cratons amalgamated at 2660-2610?Ma, the 2615?Ma mafic magmatism in the southwestern Yilgarn Craton may be associated with the same tectonic event that produced the ca. 2607-2604?Ma Stockford dykes in the Central Zone of the Limpopo Belt. Paleomagnetic evidence and a similar tectonothermal evolution, including coeval low-pressure high-temperature metamorphism, voluminous magmatism, and emplacement of mafic dykes, support a configuration where the northern part of the Zimbabwe Craton was adjacent to the western margin of the Yilgarn Craton during the Neoarchean. Worldwide, reliably dated mafic dykes of this age have so far been reported from the Yilgarn Craton, the Limpopo Belt and the São Francisco Craton.
DS201812-2828
2018
Soderlund, U.Kastek, N., Ernst, R.E., Cousens, B.L., Kamo, S.L., Bleeker, W., Soderlund, U., Baragar, W.R.A., Sylvester, P.U-Pb geochronology and geochemistry of the Povungnituk Group of the Cape Smith Belt: part of a craton scale circa 2.0 Ga Minto-Povungnituk Large Igneous Province, northern Superior craton. Lithos, Vol. 320-321, pp. 315-331.Canada, Quebeccarbonatite

Abstract: Magmatism of the Povungnituk Group of the Cape Smith Belt, northern Superior craton, was formed in three stages: (i)early alkaline magmatism and associated carbonatites (undated), (ii) a main flood basalt sequence (Beauparlant Formation) (constrained between 2040 and 1991?Ma), and (iii) a late stage alkaline pulse (Cecilia Formation) (ca. 1959?Ma). We suggest that the main stage of magmatic activity (middle pulse) was of short duration. A new UPb baddeleyite age of 1998?±?6?Ma is obtained from a dolerite sill intruding the uppermost section of the Beauparlant Formation. This age has regional significance because it matches the previously obtained 1998?±?2?Ma age for the Watts Group (Purtuniq) ophiolite of the northern Cape Smith Belt and the 1998?±?2?Ma?U-Pb age of the Minto dykes intruding the craton to the south. These coeval units, along with additional units correlated on paleomagnetic grounds (Eskimo Formation), are interpreted to define a large igneous province (LIP), extending over an area of >400,000?km2, which we herein define as the Minto-Povungnituk LIP. Geochemical comparison between the Watts Group ophiolite, Minto dykes and the mafic Povungnituk Group shows significant differences allowing these data to be divided into two groups and domains within the LIP. A northern domain, comprising the Povungnituk and Watts groups, shows mixing between a depleted mantle source and a more enriched mantle plume-sourced melt. A southern domain comprising the Minto dykes and the paleomagnetically linked Eskimo Formation shows signs of an even more enriched source, while these magmas also show the effect of crustal contamination. Two distinct source mechanisms can be responsible for the observed geochemical differences between the two domains. First, a difference in lithospheric sources, where melting of different portions of Superior craton lithosphere caused the different melt signatures in the interior of the craton. In this case magmatism in the two domains is only related by having the same heat source (e.g.,a mantle plume) interpreted to be located on the northwestern side of the northern Superior craton. Second, two distinct deep mantle sources that remained separated within the ascending plume. This is analogous to some current hotspots interpreted to sample both large low shear velocity provinces (LLSVP) and adjacent ambient deep mantle. This latter interpretation would allow for the use of bilateral chemistry in LIPs as a potential tool for the recognition and mapping of the LLSVP boundaries throughout Earth's history.
DS201902-0261
2019
Soderlund, U.Baratoux, L., Soderlund, U., Ernst, R.E., de Roever, E., Jessell, M.W., Kamo, S., Naba, S., Perrouty, S., Metelka, V., Yatte, D., Grenholm, M., Diallo, D.P., Ndiaye, P.M., Dioh, E., Cournede, C., Benoit, M., Baratoux, D., Youbi, N., Rousse, S., BendaoudNew U-Pb baddeleyite ages of mafic dyke swarms of the West African and Amazonian cratons: implication for their configuration in supercontinents through time.Dyke Swarms of the World: a modern perspective, Srivastava et al. eds. Springer , pp. 263-314.Africa, West Africa, South Americageochronology

Abstract: Eight different generations of dolerite dykes crosscutting the Paleoproterozoic basement in West Africa and one in South America were dated using the high precision U-Pb TIMS method on baddeleyite. Some of the individual dykes reach over 300 km in length and they are considered parts of much larger systems of mafic dyke swarms representing the plumbing systems for large igneous provinces (LIPs). The new U-Pb ages obtained for the investigated swarms in the southern West African Craton (WAC) are the following (oldest to youngest): 1791?±?3 Ma for the N010° Libiri swarm, 1764?±?4 Ma for the N035° Kédougou swarm, 1575?±?5 for the N100° Korsimoro swarm, ~1525-1529 Ma for the N130° Essakane swarm, 1521?±?3 Ma for the N90° Sambarabougou swarm, 915?±?7 Ma for the N070° Oda swarm, 867?±?16 Ma for the N355° Manso swarm, 202?±?5 Ma and 198?±?16 Ma for the N040° Hounde swarm, and 200?±?3 Ma for the sills in the Taoudeni basin. The last ones are related to the Central Atlantic Magmatic Province (CAMP) event. The Hounde swarm is oblique to the dominant radiating CAMP swarm and may be linked with the similar-trending elongate Kakoulima intrusion in Guinea. In addition, the N150° Käyser swarm (Amazonian craton, South America) is dated at 1528?±?2 Ma, providing a robust match with the Essakane swarm in a standard Amazonia-West African craton reconstruction, and resulting in a combined linear swarm >1500 km by >1500 km in extent. The Precambrian LIP barcode ages of c. 1790, 1765-1750, 1575, 1520, 915. 870 Ma for the WAC are compared with the global LIP record to identify possible matches on other crustal blocks, with reconstruction implications. These results contribute to the refinement of the magmatic ‘barcode’ for the West African and Amazonian cratons, representing the first steps towards plausible global paleogeographic reconstructions involving the West African and Amazonian cratons.
DS201902-0316
2019
Soderlund, U.Salminen, J., Hanson, R., Evans, D.A.D., Gong, Z., Larson, T., Walker, O., Gumsley, A., Soderlund, U., Ernst, R.Direct Mesoproterozoic connection of the Congo and Kalahari cratons in proto-Africa: strange attractors across supercontinental cycles.Geology, Vol. 46, pp. 1101-1104.Africa, Angola, Namibiacraton

Abstract: Mobilistic plate-tectonic interpretation of Precambrian orogens requires that two conjoined crustal blocks may derive from distant portions of the globe. Nonetheless, many proposed Precambrian cratonic juxtapositions are broadly similar to those of younger times (so-called “strange attractors”), raising the specter of bias in their construction. We evaluated the possibility that the Congo and Kalahari cratons (Africa) were joined together prior to their amalgamation along the Damara-Lufilian-Zambezi orogen in Cambrian time by studying diabase dikes of the Huila-Epembe swarm and sills in the southern part of the Congo craton in Angola and in Namibia. We present geologic, U-Pb geochronologic, and paleomagnetic evidence showing that these two cratons were directly juxtaposed at ca. 1.1 Ga, but in a slightly modified relative orientation compared to today. Recurring persistence in cratonic connections, with slight variations from one supercontinent to the next, may signify a style of supercontinental transition similar to the northward motion of Gondwana fragments across the Tethys-Indian oceanic tract, reuniting in Eurasia.
DS201902-0317
2019
Soderlund, U.Samal, A.K., Srivastava, R.K., Ernst, R.E., Soderlund, U.Neoarchean-Mesoproterozoic mafic dyke swarms of the Indian shield mapped using google Earth images and ArcGIStm, and links with Large Igneous Provinces.Srivastava: Dyke Swarms of the World: a Modern Perspective, Springer, researchgate 56p. PdfIndiadykes

Abstract: We present dyke swarm maps generated using Google Earth™ images, ArcGIS™, field data, and available geochronological ages of Neoarchean-Mesoproterozoic (ranging in age from ~2.80 to ~1.10 Ga) mafic dyke swarms and associated magmatic units of the different Archean cratons of the Indian shield which represent the plumbing system of Large Igneous Provinces (LIPs). The spatial and temporal distributions together with the trends of the dyke swarms provide important informations about geodynamics. Twenty four dyke swarms (17 have been precisely dated), mostly mafic in nature, have been mapped from the different cratons and named/re-named to best reflect their location, trend, distribution and distinction from other swarms. We have identified 14 distinct magmatic events during the Neoarchean-Mesoproterozoic in the Indian shield. These intraplate magmatic events (many of LIP scale) of the Indian shield and their matches with coeval LIPs on other crustal blocks suggest connections of the Indian shield within known supercontinents, such as Kenorland/Superia (~2.75-2.07 Ga), Columbia/Nuna (1.90-1.38 Ga), and Rodinia (1.20-0.72 Ga). However, further detailed U-Pb geochronology and associated paleomagnetism are required to come to any definite constraints on the position of the Indian cratons within these supercontinents.
DS201905-1077
2018
Soderlund, U.Soderlund, U., Bleeker, W., Demirer, K., Srivastava, R.K., Hamilton, M., Nilsson, M., Personen, L.J., Samal, A.K., Jayananda, M., Ernst, R.E., Srinivas, M.Emplacement ages of Paleoproterozoic mafic dyke swarms in eastern Dharwar craton, India: implications for paleoreconstructions and support for a ~30 degree change in dyke trends from south to north.Precambrian Research, doi.org/10.1016/ j.precamres.2018.12.017Indiacraton

Abstract: Large igneous provinces (LIPs) and especially their dyke swarms are pivotal to reconstruction of ancient supercontinents. The Dharwar craton of southern Peninsular India represents a substantial portion of Archean crust and has been considered to be a principal constituent of Superia, Sclavia, Nuna/Columbia and Rodinia supercontinents. The craton is intruded by numerous regional-scale mafic dyke swarms of which only a few have robustly constrained emplacement ages. Through this study, the LIP record of the Dharwar craton has been improved by U-Pb geochronology of 18 dykes, which together comprise seven generations of Paleoproterozoic dyke swarms with emplacement ages within the 2.37-1.79 Ga age interval. From oldest to youngest, the new ages (integrated with U-Pb ages previously reported for the Hampi swarm) define the following eight swarms with their currently recommended names: NE-SW to ESE-WNW trending ca. 2.37 Ga Bangalore-Karimnagar swarm. N-S to NNE-SSW trending ca. 2.25 Ga Ippaguda-Dhiburahalli swarm. N-S to NNW-SSE trending ca. 2.22 Ga Kandlamadugu swarm. NW-SE to WNW-ESE trending ca. 2.21 Ga Anantapur-Kunigal swarm. NW-SE to WNW-ESE trending ca. 2.18 Ga Mahbubnagar-Dandeli swarm. N-S, NW-SE, and ENE-WSW trending ca. 2.08 Ga Devarabanda swarm. E-W trending 1.88-1.89 Ga Hampi swarm. NW-SE ca. 1.79 Ga Pebbair swarm. Comparison of the arcuate trends of some swarms along with an apparent oroclinal bend of ancient geological features, such as regional Dharwar greenstone belts and the late Archean (ca. 2.5 Ga) Closepet Granite batholith, have led to the hypothesis that the northern Dharwar block has rotated relative to the southern block. By restoring a 30° counter clockwise rotation of the northern Dharwar block relative to the southern block, we show that pre-2.08 Ga arcuate and fanning dyke swarms consistently become approximately linear. Two possible tectonic models for this apparent bending, and concomitant dyke rotations, are discussed. Regardless of which deformation mechanisms applies, these findings reinforce previous suggestions that the radial patterns of the giant ca. 2.37 Ga Bangalore-Karimnagar dyke swarm, and probably also the ca. 2.21 Ga Anantapur-Kunigal swarm, may not be primary features.
DS201909-2081
2019
Soderlund, U.Samal, A.K., Srivastava, R.K., Ernst, R.E., Soderlund, U.Precambrian large igneous province record of the Indian Shield: an update based on extensive U-Pb dating of mafic dyke swarms.Precambrian Research, doi.org/j.precamres .2018.12.07 24p.Indiacarbonatite, kimberlite
DS201912-2828
2019
Soderlund, U.Srivastava, R.K., Soderlund, U., Ernst, R.E., Mondal, S.K., Samal, A.K.Precambrian mafic dyke swarms in the Singhbhum craton ( eastern India) and their links with syke swarms of the eastern Dhwar craton ( southern India).Precambrian Research, Vol. 329, pp. 5-17.Indiacraton

Abstract: Based on trend, cross-cutting relationships and U-Pb dating, Precambrian mafic dykes in the Singhbhum craton, earlier collectively identified as ‘Newer Dolerite Swarm’ have been separated into seven distinct swarms, which are thought to be the plumbing systems for Large Igneous Provinces (LIPs). These Singhbhum swarms range in age from ~2.80 Ga to ~1.76 Ga, and include the ~2.80 Ga NE-SW trending Keshargaria swarm, ~2.75-2.76 Ga NNE-SSW to NE-SW trending Ghatgaon swarm, the ~2.26 Ga NE-SW to ENE-WSW trending Kaptipada swarm (based on a new U-Pb ID-TIMS age 2256 ± 6 Ma), the ~1.77 Ga WNW-ESE trending Pipilia swarm, the early-Paleoproterozoic E-W to ENE-WSW trending Keonjhar swarm, the middle-Paleoproterozoic NW-SE to NNW-SSE trending Bhagamunda swarm, and the late-Paleoproterozoic N-S to NNE-SSW trending Barigaon swarm. Two of the Singhbhum swarms, the ~2.26 Ga Kaptipada and ~1.77 Ga Pipilia, are closely matched with the ~2.26-2.25 Ga Ippaguda-Dhiburahalli and ~1.79 Ga Pebbair swarms, respectively, of the eastern Dharwar craton. The correlations suggest that the Singhbhum and Dharwar cratons were close enough at these times to share two reconstructed LIPs, a 2.26-2.25 Ga Kaptipada- Ippaguda-Dhiburahalli LIP and a 1.79-1.77 Ga Pipilia-Pebbair LIP, and if so, both swarms must be present in the intervening Bastar craton (candidates are proposed). Also, the 2.76-2.75 Ga Ghatgaon swarm of the Singhbhum craton can be provisionally correlated with ~2.7 Ga Keshkal swarm of the Bastar craton. The 2.26-2.25 Ga Kaptipada-Ippaguda-Dhiburahalli LIP of the Singhbhum-Bastar-Dharwar reconstruction has age matches in the Vestfold Hills of Antarctica (~2.24 Ga dykes), the Kaapvaal craton (the ~2.25-2.23 Ga Hekpoort lavas) and perhaps the Zimbabwe craton (2.26 Ga Chimbadzi troctolite intrusions). The 1.76-1.79 Ga Pipilia-Pebbair LIP of the Singhbhum-Bastar-Dharwar reconstruction has age matches in the North China, Australian Shield, Amazonian, Rio de Plata and Sarmatia cratons. The relevance of these matches for reconstructions will require future testing using paleomagnetic studies. While there are ~2.7-2.8 Ga LIP-type greenstone belts in many crustal blocks, there are no precise matches with the 2.76-2.75 Ga Ghatgaon swarm of the Singhbhum craton. Howe
DS202004-0500
2020
Soderlund, U.Ba, M.H., Ibough, H., Lo, K., Youbi, N., Jaffal, M., Ernst, R.E., Niang, A.J., Dia, I., Abdeina, E.H., Bensalah, M.K., Boumehdi, M.A., Soderlund, U.Spatial and temporal distribution patterns of Precambrian mafic dyke swarms in northern Mauritania ( West African Craton): analysis and results fro remote sensing interpretation, geographical information systems ( GIS), Google Earth TM images, and regionaArabian Journal of Geosciences, Vol. 13, , 209 orchid.org/ 0000-002-3287-9537Africa, Mauritaniacraton

Abstract: We used remote sensing, geographical information systems, Google Earth™ images, and regional geology in order to (i) improve the mapping of linear structures and understand the chronology of different mafic dyke swarms in the Ahmeyim area that belongs to the Archean Tasiast-Tijirit Terrane of the Reguibat Shield, West African craton, NW Mauritania. The spatial and temporal distributions with the trends of the dyke swarms provide important information about geodynamics. The analysis of the mafic dyke swarms map and statistical data allow us to distinguish four mafic dyke swarm sets: a major swarm trending NE-SW to NNE-SSW (80%) and three minor swarms trending EW to ENE-WSW (9.33%), NW-SE to WNW-ESE (9.06%), and NS (1.3%). The major swarms extend over 35 km while the minor swarms do not exceed 13 km. The Google Earth™ images reveal relative ages through crossover relationships. The major NE-SW to NNE-SSW and the minor NS swarms are the oldest generations emplaced in the Ahemyim area. The NW-SE-oriented swarm dykes which are cutting the two former swarms are emplaced later. The minor E-W to WSW-ENE swarms are probably the youngest. A precise U-Pb baddeleyite age of 2733?±?2 Ma has been obtained for the NNE-SSW Ahmeyim Great Dyke. This dyke is approximately 1500 m wide in some zone and extends for more than 150 km. The distinct mafic dyke swarms being identified in this study can potentially be linked with coeval magmatic events on other cratons around the globe to identify reconstructed LIPs and constrain continental reconstructions.
DS1960-0748
1966
Soderstrom, L.Soderstrom, L.The Kimberlites of Avike Bay on the Bothnian Coast of SwedenGeol. Foren. Forhandl., Vol. 88, PP. 351-360.Sweden, ScandinaviaKimberlite, Alnoite, Petrology
DS200612-1332
2006
Sodoudi, F.Sodoudi, F., Yuan, X., Liu, Q., Chen, J.K.Lithospheric thickness beneath the Dabie Shan, central eastern Chin a from S receiver functions.Geophysical Journal International, Vol. 166, 3, pp. 1362-1367.ChinaGeophysics - seismics, UHP
DS201012-0220
2010
Sodoudi, F.Geissler, W.H., Sodoudi, F., Kind, R.Thickness of the central and eastern European lithosphere as soon by S receiver functions.Geophysical Journal International, Vol. 181, 2, pp. 604-634.EuropeGeophysics - seismic
DS201012-0330
2010
Sodoudi, F.Jones, A.G., Plomerova, J., Korja, T., Sodoudi, F., Spakman, W.Europe from the bottom up: a statistical examination of the central and northern European lithosphere asthenosphere boundary comparing seismological & EMLithos, in press available, 51p.EuropeGeophysics - seismics
DS201212-0790
2012
Sodoudi, F.Wolbern, I., Rumpker, G., Link, K., Sodoudi, F.Melt infiltration of the lower lithosphere beneath the Tanzania craton and the Albertine rift inferred from S receiver functions.Geochemical, Geophysics, Geosystems: G3, Vol. 10, in pressAfrica, TanzaniaTomography
DS201412-0864
2013
Sodoudi, F.Sodoudi, F., Yuan, X., Kind, R., Lebedev, S., Adam, J., et al.Seismic evidence for stratification in composition and anisotropic fabric within the thick lithosphere of Kalahari craton.Geochemistry, Geophysics, Geosystems: G3, Vol. 14, 12, pp. 5393-5412.Africa, South AfricaGeophysics - seismics
DS200812-1239
2007
Soe Moe, K.Wang, W., Hall, W.S., Soe Moe, K., Tower, J., Moses, T.M.Latest generation CVD grown synthetic diamonds from Appollo Diamond Inc.Gems & Gemology, Vol. 43, 4, Winter pp. 294-312.TechnologyOverview of CVD
DS201212-0762
2012
Soe Moe, K.Wang, W., D'Haenens-Johansson, U.F.S., Johnson, P., Soe Moe, K., Emerson, E., Newton, M., Moses, T.M.CVD synthetic diamodns from Gemesis Corp.Gems & Gemology, Vol. 48, 2, Summer pp. 80-97.TechnologyGemesis
DS201312-0954
2012
Soe Moe, K.Wang, W., D'Haenens-Johansson, U.F.S., Johnson, P., Soe Moe, K., Emerson, E., Newton, M.E., Moses, T.M.CVD synthetic diamonds from Gemesis Corp.Gems & Gemology, Vol. 48, , summer pp. 80-97.TechnologyGemesis
DS201412-0186
2014
Soe Moe, K.D'Haenens-Johansson, U.F.S., Soe Moe, K., Johnson, P., Yan Wong, S., Lu, R., Wang, W.Near-colorless HPHT synthetic diamonds from AOTC group.Gems & Gemology, Vol. 50, 1, Spring, pp. 30-45.TechnologySynthetic diamonds
DS2002-0682
2002
Soeding, E.Hay, W.W., Soeding, E., De Conto, R.M., Wold, C.N.The late Cenozoic uplift - climate change paradoxInternational Journal of Earth Sciences, Vol. 91, No. 5, Oct. pp. 746-74.GlobalGeomorphology - climate change
DS2000-0912
2000
Soedjatmiko, B.Soedjatmiko, B., Christensen, N.I.Seismic anisotropy under extended crust: evidence from upper mantle xenoliths, Cima Volcanic Field.Tectonophysics, Vol.321, No.3, June 15, pp. 279-96.CaliforniaGeophysics - seismics, Xenoliths - olivine
DS200812-1065
2008
Soemundsson, K.Sigmundsen, F., Soemundsson, K.Iceland: a window on North Atlantic divergent plate tectonics and geologic processes.Episodes, Vol. 31, 4, pp. 92-97.Europe, IcelandTectonics
DS201608-1418
2016
Soesilo, J.Kueter, N., Soesilo, J., Fedortchouk, Y., Nestola, F., Belluco, L., Troch, J., Walle, M., Giuillong, M., Von Quadt, A., Driesner, T.Tracing the depositional history of Kalimantan diamonds by zircon provenance and diamond morphology studies. ( kimberlite or lamproite)Lithos, in press availableIndonesia, BorneoDeposit - Kalimantan

Abstract: Diamonds in alluvial deposits in Southeast Asia are not accompanied by indicator minerals suggesting primary kimberlite or lamproite sources. The Meratus Mountains in Southeast Borneo (Province Kalimantan Selatan, Indonesia) provide the largest known deposit of these so-called “headless” diamond deposits. Proposals for the origin of Kalimantan diamonds include the adjacent Meratus ophiolite complex, ultra-high pressure (UHP) metamorphic terranes, obducted subcontinental lithospheric mantle and undiscovered kimberlite-type sources. Here we report results from detailed sediment provenance analysis of diamond-bearing Quaternary river channel material and from representative outcrops of the oldest known formations within the Alino Group, including the diamond-bearing Campanian-Maastrichtian Manunggul Formation. Optical examination of surfaces of diamonds collected from artisanal miners in the Meratus area (247 stones) and in West Borneo (Sanggau Area, Province Kalimantan Barat;
DS201707-1342
2017
Soesilo, J.Kueter, N., Soesilo, J., Fedortchouk, Y., Nestola, F., Belluco, L., Troch, J., Walle, M., Guillong, M., Von Quadt, A., Driesner, T.Tracing the depositional history of Kalimantan diamonds by zircon proveneance and diamond morphology studies. Appendix 1 and 2Academia.edu, Supplementary material app. 1 and 2, both 10p.Asia, Kalimantandeposit - Kalimantan

Abstract: Diamonds in alluvial deposits in Southeast Asia are not accompanied by indicator minerals suggesting primary kimberlite or lamproite sources. The Meratus Mountains in Southeast Borneo (Province Kalimantan Selatan, Indonesia) provide the largest known deposit of these so-called “headless” diamond deposits. Proposals for the origin of Kalimantan diamonds include the adjacent Meratus ophiolite complex, ultra-high pressure (UHP) metamorphic terranes, obducted subcontinental lithospheric mantle and undiscovered kimberlite-type sources. Here we report results from detailed sediment provenance analysis of diamond-bearing Quaternary river channel material and from representative outcrops of the oldest known formations within the Alino Group, including the diamond-bearing Campanian–Maastrichtian Manunggul Formation. Optical examination of surfaces of diamonds collected from artisanal miners in the Meratus area (247 stones) and in West Borneo (Sanggau Area, Province Kalimantan Barat; 85 stones) points toward a classical kimberlite-type source for the majority of these diamonds. Some of the diamonds host mineral inclusions suitable for deep single-crystal X-ray diffraction investigation. We determined the depth of formation of two olivines, one coesite and one peridotitic garnet inclusion. Pressure of formation estimates for the peridotitic garnet at independently derived temperatures of 930–1250 °C are between 4.8 and 6.0 GPa. Sediment provenance analysis includes petrography coupled to analyses of detrital garnet and glaucophane. The compositions of these key minerals do not indicate kimberlite-derived material. By analyzing almost 1400 zircons for trace element concentrations with laser ablation ICP-MS (LA-ICP-MS) we tested the mineral's potential as an alternative kimberlite indicator. The screening ultimately resulted in a small subset of ten zircons with a kimberlitic affinity. Subsequent U–Pb dating resulting in Cretaceous ages plus a detailed chemical reflection make a kimberlitic origin unfavorable with respect to the regional geological history. Rather, trace elemental analyses (U, Th and Eu) suggest an eclogitic source for these zircons. The age distribution of detrital zircons allows in general a better understanding of collisional events that formed the Meratus orogen and identifies various North Australian Orogens as potential Pre-Mesozoic sediment sources. Our data support a model whereby the majority of Kalimantan diamonds were emplaced within the North Australian Craton by volcanic processes. Partly re-deposited into paleo-collectors or residing in their primary host, these diamond-deposits spread passively throughout Southeast Asia by terrane migration during the Gondwana breakup. Terrane amalgamation events largely metamorphosed these diamond-bearing lithologies while destroying the indicative mineral content. Orogenic uplift finally liberated their diamond-content into new, autochthonous placer deposits.
DS1997-1077
1997
Soesoo, A.Soesoo, A., Bons, P.D., Gray, D.R., Foster, D.A.Divergent double subduction: tectonics and petrologic consequencesGeology, Vol. 25, No. 8, August pp. 755-758.MantleTectonics, Subduction
DS1998-0389
1998
Soesoo, A.Elburg, M.A., Soesoo, A.Jurassic alkali rich magmatism in Victoria (Australia): its relation to Gondwana break up.Journal of African Earth Sciences, Vol. 27, 1A, p. 64. AbstractAustraliaGondwana, Alkaline magmatism
DS2001-0900
2001
Soffer, R.J.Peddle, D.R., White, H.P., Soffer, R.J., Miller, J.R.Reflectance processing of remote sensing spectroradiometer dataComp. and Geosciences, Vol. 27, No. 2, pp. 203-13.GlobalRemote sensing - reflectance, Program - BOREAS not specific to diamonds
DS201610-1867
2015
Sofianides, A.S.Harlow, G.E., Sofianides, A.S.Gems & Crystals from one of the World's great collections. American Museum of Natural HistoryAmerican Mineralogist, Vol. 101, p. 2132.GlobalBook review
DS201704-0619
2017
Sofonio, K.Baker, D.R., Sofonio, K.A metasomatic mechanism for the formation of Earth's earliest evolved crust.Earth and Planetary Science Letters, Vol. 463, pp. 48-55.MantleMetasomatism

Abstract: Following giant impacts the early Hadean Earth was shrouded in a steam atmosphere for durations on the order of 1 Ma. In order to investigate the potential of this atmosphere to fractionate major elements between various silicate reservoirs and influence a planet's geochemical evolution, we performed experiments simulating the interaction of a post-giant-impact steam atmosphere with a bulk silicate Earth (BSE) composition. Our experiments indicate that the composition of the solute in a water-rich atmosphere at 10 MPa and ~727?°C is remarkably similar to that of Earth's modern continental crust and would constitute up to 10% of the solution mass. This solute composition is similar to solute compositions previously measured at higher pressures, but distinct from those of near-solidus peridotite melts. Mass balance calculations based upon the hypothesis that Earth's initial water concentration was similar to that in CI carbonaceous chondrites, and that degassing and metasomatism produced the BSE, indicate that metasomatism could produce from 10 to 300% of the mass of the modern crust. If instead the amount of metasomatism is estimated by the difference between the water concentration in the BSE and in the depleted upper mantle, then a mass of up to approximately 4% of the current crust could be produced by metasomatism. Using results of earlier research we find that the solute is expected to have a smaller Sm/Nd ratio than the residual BSE, and if the solute was formed early in Earth's history its Nd isotopic signatures would be highly enriched. Although we cannot be certain that the metasomatic process created a significant fraction of Earth's crust in the early Hadean, our research indicates that it has the potential to form crustal nuclei and possibly was responsible for the production of incompatible-element enriched reservoirs in the early Earth, as seen in the isotopic signatures of Archean rocks.
DS201912-2826
2019
Sofonov, O.G.Sofonov, O.G., Butvina, V.G., Limanov, E.V., Kosova, S.A.Mineral indicators of reactions involving fluid salt components in the deep lithosphere. (eclogites and peridotites)Petrology, Vol. 27, pp. 489-515.MantleUHP, redox

Abstract: The salt components of aqueous and aqueous-carbonic fluids are very important agents of metasomatism and partial melting of crustal and mantle rocks. The paper presents examples and synthesized data on mineral associations in granulite- and amphibolite-facies rocks of various composition in the middle and lower crust and in upper-mantle eclogites and peridotites that provide evidence of reactions involving salt components of fluids. These data are analyzed together with results of model experiments that reproduce some of these associations and make it possible to more accurately determine their crystallization parameters.
DS200812-1208
2007
Sofroneev, S.V.Vasilev, E.A., Sofroneev, S.V.Zoning of diamonds from the Mir kimberlite pipe: results of Fourier transformed infrared spectroscopy.Geology of Ore Deposits, Vol. 49, 6, pp. 784-791.Russia, YakutiaDeposit - Mir
DS1950-0236
1955
SoguinexSoguinexRoche D'origine du Diamant En GuineeLa Chronique Des Mines Coloniales, 23RD. ANNEE, No. 228, JUNE, PP. 175-176.GlobalGenesis, Diamond
DS201801-0064
2017
SohSimon, S.J., Wei, C.T., Viladkar, S.G., Ellmies, R., Soh, Tamech, L.S., Yang, H., Vatuva, A.Metamitic U rich pyrochlore from Epembe sovitic carbonatite dyke, NW Namibia.Carbonatite-alkaline rocks and associated mineral deposits , Dec. 8-11, abstract p. 12.Africa, Namibiadeposit - Epembe

Abstract: The Epembe carbonatite dyke is located about 80 km north of Opuwo, NW Namibia. The 10 km long dyke is dominated by massive and banded sövitic carbonatite intrusions. Two distinct type of sövite have been recognized: (1) coarse-grained light grey Sövite I which is predominant in brecciated areas and (2) medium- to fine-grained Sövite II which hosts notable concentrations of pyrochlore and apatite. The contact between the carbonatite and basement gneisses is marked by K-feldspar fenite. The pyrochlore chemistry at Epembe shows a compositional trend from primary magmatic Ca-rich pyrochlore toward late hydrothermal fluid enriched carbonatite phase, giving rise to a remarkable shift in chemical composition and invasion of elements such as Si, U, Sr, Ba, Th and Fe. Enrichment in elements like U, Sr and Th lead to metamictization, alteration and A-site vacancy. It is therefore suggested that the carbonatite successive intrusive phases assimilated primary pyrochlore leading to extreme compositional variation especially around the rims of the pyrochlore. The genesis of the Epembe niobium deposit is linked to the carbonatite magmatism but the mechanism that manifested such niobium rich rock remains unclear and might be formed as a result of cumulate process and/or liquid immiscibility of a carbonate-silicate pair.
DS1988-0650
1988
Sohn, I.Sohn, I.The debt crisis and minerals exporting developing countries: problems andprospectsNatural Resources forum, Vol. 12, No. 4, November pp. 383-392. Database # 17739Third GlobalEconomics, Macro-economics
DS200912-0710
2009
Sohn, I.Sohn, I.Minerals-supply security and mineral-use efficiency: some observations from the 1970-2005 interval.Minerals & Energy - Raw Materials Report, Vol. 23, no. 4, pp. 145- 161.GlobalEconomic modelling pitfalls
DS2003-0154
2003
Sohn, R.A.Braun, M.G., Sohn, R.A.Melt migration in plume ridge systemsEarth and Planetary Science Letters, Vol. 213, 3-4, pp. 417-30.GlobalTectonics - not specific to diamonds
DS200412-0202
2003
Sohn, R.A.Braun, M.G., Sohn, R.A.Melt migration in plume ridge systems.Earth and Planetary Science Letters, Vol. 213, 3-4, pp. 417-30.GlobalTectonics - not specific to diamonds
DS1930-0264
1937
Sohnge, P.G.Sohnge, P.G.The Geology and archeology of the Vaal River BasinGeological Survey of South Africa MEMOIR., No. 35South AfricaVaal River Diggings
DS1950-0465
1959
Sohnge, P.G.Devilliers, J.DE, Sohnge, P.G.The Geology of the RichtersveldGeological Survey of South Africa, MEMOIR No. 48, 295P.South AfricaAlexander Bay, Geology, Kimberley
DS1960-0401
1963
Sohnge, P.G.Sohnge, P.G.Genetic Problems of Pipe Deposits in South AfricaGeological Society of South Africa Proceedings, Vol. 66, PP. 19-77.South AfricaGenesis
DS1989-1427
1989
Soifer, B.T.Soifer, B.T., Beichman, C.A., Sanders, D.B.An infrared view of the universe #1American Scientist, Vol. 77, No. 1, January-February pp. 46-53. Database #GlobalGeophysics, Remote sensing -IRAS
DS201212-0470
2012
Sojem, J.Michael, L., Sojem, J., Robin, P.The geology and geochemistry of the Wadagera kimberlite and the characteristics of the underlying subcontinental lithospheric mantle, Dharwar Craton, India10th. International Kimberlite Conference Feb. 6-11, Bangalore India, AbstractIndiaDeposit - Wadagera
DS201507-0325
2015
Sokharev, V.A.Mikhailova, J.A., Kalashnikov, A.O., Sokharev, V.A., Pakhomovsky, Y.A., Konopleva, N.G., Yakovenchuk, V.N., Bazai, A.V., Goryainov, P.M., Ivanyuk, G.Yu.3D mineralogical mapping of the Kovdor phoscorite-carbonatite complex, Russia.Mineralium Deposita, In press available. 19p.RussiaCarbonatite
DS201511-1849
2016
Sokharev, V.A.Kalashnikov, A.O., Yakovenchuk, V.N., Pakhomovsky, Y.A.A., Bazai, A.V., Sokharev, V.A., Konopleva, N.G., Mikhailova, J.A., Goryainov, P.M., Ivanyuk, G.Yu.Scandium of the Kovdor baddeleyite apatite magnetite deposit ( Murmansk region, Russia): mineralogy, spatial distribution, and potential source.Ore Geology Reviews, Vol. 72, pp. 532-537.RussiaCarbonatite
DS201602-0226
2016
Sokharev, V.A.Mikhailova, J.A., Kalashnikov, A.O., Sokharev, V.A., Pakhomovsky, Y.A., Konopleva, N.G., Yakovenchuk, V.N., Bazai, A.V., Goryainov, P.M., Ivanyuk, G.Y.3D mineralogical mapping of the Kovdor phoscorite carbonatite complex ( Russia).Mineralium Deposita, Vol. 51, 1, pp. 131-149.RussiaDeposit - Kovdor

Abstract: The Kovdor baddeleyite-apatite-magnetite deposit in the Kovdor phoscorite-carbonatite pipe is situated in the western part of the zoned alkali-ultrabasic Kovdor intrusion (NW part of the Fennoscandinavian shield; Murmansk Region, Russia). We describe major intrusive and metasomatic rocks of the pipe and its surroundings using a new classification of phoscorite-carbonatite series rocks, consistent with the IUGS recommendation. The gradual zonation of the pipe corresponds to the sequence of mineral crystallization (forsterite-hydroxylapatite-magnetite-calcite). Crystal morphology, grain size, characteristic inclusions, and composition of the rock-forming and accessory minerals display the same spatial zonation pattern, as do the three minerals of economic interest, i.e. magnetite, hydroxylapatite, and baddeleyite. The content of Sr, rare earth elements (REEs), and Ba in hydroxylapatite tends to increase gradually at the expense of Si, Fe, and Mg from early apatite-forsterite phoscorite (margins of the pipe) through carbonate-free, magnetite-rich phoscorite to carbonate-rich phoscorite and phoscorite-related carbonatite (inner part). Magnetite displays a trend of increasing V and Ca and decreasing Ti, Mn, Si, Cr, Sc, and Zn from the margins to the central part of the pipe; its grain size initially increases from the wall rocks to the inner part and then decreases towards the central part; characteristic inclusions in magnetite are geikielite within the marginal zone of the phoscorite-carbonatite pipe, spinel within the intermediate zone, and ilmenite within the inner zone. The zoning pattern seems to have formed due to both cooling and rapid degassing (pressure drop) of a fluid-rich magmatic column and subsequent pneumatolytic and hydrothermal processes.
DS201604-0611
2016
Sokharev, V.A.Ivanyuk, G.Yu., Kalashnikov, A.O., Pakhomovsky, Ya.A., Mikhailov, J.A., Yakovenchuk, V.N., Konopleva, N.G., Sokharev, V.A., Bazai, A.V., Goryainov, P.M.Economic minerals of the Kovdor baddeleyite apatite magnetite deposit, Russia: mineralogy, spatial distribution and ore processing optimization.Ore Geology Reviews, in press available 73p.RussiaDeposit - Kovdor

Abstract: The comprehensive petrographical, petrochemical and mineralogical study of the Kovdor magnetite-apatite-baddeleyite deposit in the phoscorite-carbonatite complex (Murmansk Region, Russia) revealed a spatial distribution of grain size and chemical composition of three economically extractable minerals — magnetite, apatite, and baddeleyite, showing that zonal distribution of mineral properties mimics both concentric and vertical zonation of the carbonatite-phoscorite pipe. The marginal zone of the pipe consists of (apatite)-forsterite phoscorite carrying fine grains of Ti-Mn-Si-rich magnetite with ilmenite exsolution lamellae, fine grains of Fe-Mg-rich apatite and finest grains of baddeleyite, enriched in Mg, Fe, Si and Mn. The intermediate zone accommodates carbonate-free magnetite-rich phoscorites that carry medium to coarse grains of Mg-Al-rich magnetite with exsolution inclusions of spinel, medium-grained pure apatite and baddeleyite. The axial zone hosts carbonate-rich phoscorites and phoscorite-related carbonatites bearing medium-grained Ti-V-Ca-rich magnetite with exsolution inclusions of geikielite-ilmenite, fine grains of Ba-Sr-Ln-rich apatite and comparatively large grains of baddeleyite, enriched in Hf, Ta, Nb and Sc. The collected data enable us to predict such important mineralogical characteristics of the multicomponent ore as chemical composition and grain size of economic and associated minerals, presence of contaminating inclusions, etc. We have identified potential areas of maximum concentration of such by-products as scandium, niobium and hafnium in baddeleyite and REEs in apatite.
DS201605-0847
2016
Sokharev, V.A.Ivanyuk, G.Yu., Kalashnikov, A.O., Pakhomovsky, Ya.A., Mikhailova, J.A., Yakovenchuk, V.N., Konopleva, N.G., Sokharev, V.A., Bazai, A.V., Goryainov, P.M.Economic minerals of the Kovdor baddeleyite apatite magnetite deposit, Russia: mineralogy, spatial distribution and ore procesing optimization.Ore Geology Reviews, Vol. 77, pp. 279-311.RussiaCarbonatite, Kovdor

Abstract: The comprehensive petrographical, petrochemical and mineralogical study of the Kovdor magnetite-apatite-baddeleyite deposit in the phoscorite-carbonatite complex (Murmansk Region, Russia) revealed a spatial distribution of grain size and chemical composition of three economically extractable minerals — magnetite, apatite, and baddeleyite, showing that zonal distribution of mineral properties mimics both concentric and vertical zonation of the carbonatite-phoscorite pipe. The marginal zone of the pipe consists of (apatite)-forsterite phoscorite carrying fine grains of Ti-Mn-Si-rich magnetite with ilmenite exsolution lamellae, fine grains of Fe-Mg-rich apatite and finest grains of baddeleyite, enriched in Mg, Fe, Si and Mn. The intermediate zone accommodates carbonate-free magnetite-rich phoscorites that carry medium to coarse grains of Mg-Al-rich magnetite with exsolution inclusions of spinel, medium-grained pure apatite and baddeleyite. The axial zone hosts carbonate-rich phoscorites and phoscorite-related carbonatites bearing medium-grained Ti-V-Ca-rich magnetite with exsolution inclusions of geikielite-ilmenite, fine grains of Ba-Sr-Ln-rich apatite and comparatively large grains of baddeleyite, enriched in Hf, Ta, Nb and Sc. The collected data enable us to predict such important mineralogical characteristics of the multicomponent ore as chemical composition and grain size of economic and associated minerals, presence of contaminating inclusions, etc. We have identified potential areas of maximum concentration of such by-products as scandium, niobium and hafnium in baddeleyite and REEs in apatite.
DS201608-1413
2016
Sokharev, V.A.Ivanyuk, G.Yu., Kalashnikov, A.O., Pakhomovsky, Ya.A., Mikhailova, J.A., Yakovenchuk, V.N., Konopleva, N.G., Sokharev, V.A., Bazai, A.V., Goryainov, P.M.Economic minerals of the Kovdor baddeleyite apatite magnetite deposit, Russia: mineralogy, spatial distribution and ore processing optimization.Ore Geology Reviews, Vol. 77, pp. 279-311.RussiaDeposit - Kovdor

Abstract: The comprehensiv