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SDLRC - Scientific Articles all years by Author - H-Hd


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 - H-Hd
Posted/
Published
AuthorTitleSourceRegionKeywords
DS201904-0752
2019
H.Kobayashi, M., Sumino, H., Burgess, R., Nakai, S., Iizuka, T., Nagao, J. Kagi, H., Nakamura, M., Takahashi, E., Kogiso, T., Ballentine, C.J.Halogen heterogeneity in the lithosphere and evolution of mantle halogen abundances inferred from intraplate mantle xenoliths. Kilbourne HoleGeochemistry, Geophysics, Geosystems, Vol. 20, 2, pp. 952-973.United States, New Mexicoxenoliths

Abstract: Elemental and isotopic compositions of volatile species such as halogens, noble gases, hydrogen, and carbon can be used to trace the evolution of these species in the Earth. Halogens are important tracers of subduction recycling of surface volatiles into the mantle: however, there is only limited understanding of halogens in the mantle. Here we provide new halogen data of mantle xenoliths from intraplate settings. The mantle xenoliths show a wide range of halogen elemental ratios, which are expected to be related to later processes after the xenoliths formed. A similar primary halogen component is present in the xenoliths sampled from different localities. This suggests that the mantle has the uniform halogen composition over a wide scale. The halogen composition in the convecting mantle is expected to have remained constant over more than 2 billion years, despite subduction of iodine-rich halogens. We used mass balance calculations to gain understanding into evolution rate of I/Cl ratio in the mantle. Calculations suggest that, in order to maintain the I/Cl ratio of the mantle over 2 Gyr, the I/Cl ratio of the subducted halogens must be no more than several times higher than the present-day mantle value.
DS201906-1271
2019
H+Gazel, E.Barry, P.H., de Moor, J.M., Giovannelli, D., Schrenk, M., Hummer, D.R., Lopez, T., Pratt, C.A., Alpizar Segua, Y., Battaglia, A., Beaudry, A., Bini, G., Cascante, M., d'Errico, G., di Carlo, M., Fattorini, D., Fullerton, K., H+Gazel, E., Gonzalez, G., HalForearc carbon sink reduces long term volatile recycling into the mantle.Nature , 588, 7753, p. 487.Mantlecarbon

Abstract: Carbon and other volatiles in the form of gases, fluids or mineral phases are transported from Earth’s surface into the mantle at convergent margins, where the oceanic crust subducts beneath the continental crust. The efficiency of this transfer has profound implications for the nature and scale of geochemical heterogeneities in Earth’s deep mantle and shallow crustal reservoirs, as well as Earth’s oxidation state. However, the proportions of volatiles released from the forearc and backarc are not well constrained compared to fluxes from the volcanic arc front. Here we use helium and carbon isotope data from deeply sourced springs along two cross-arc transects to show that about 91 per cent of carbon released from the slab and mantle beneath the Costa Rican forearc is sequestered within the crust by calcite deposition. Around an additional three per cent is incorporated into the biomass through microbial chemolithoautotrophy, whereby microbes assimilate inorganic carbon into biomass. We estimate that between 1.2 × 108 and 1.3 × 1010 moles of carbon dioxide per year are released from the slab beneath the forearc, and thus up to about 19 per cent less carbon is being transferred into Earth’s deep mantle than previously estimated.
DS1980-0156
1980
Haack, E.M.Haack, E.M.Collecting Gems and Minerals in South AfricaLapidary Journal, Vol. 34, No. 9, PP. 1936-1940.South AfricaGuidebook
DS2003-0117
2003
Haack, H.Bizzaro, M., Baker, J.A., Haack, H., Ulfbeck, D., Rosing, M.Early history of Earth's crust mantle system inferred from hafnium isotopes inNature, No. 6926, Feb. 27, pp. 931-2.MantleGeochronology
DS1996-0577
1996
Haack, U.K.Haack, U.K., Zimmermann, H.D.Retrograde mineral reactions: a heat source in the continental crust?Geologische Rundschau, Vol. 85, pp. 130-137Mantle, crustHydrothermal systems, Water/ rock reaction, exothermic
DS1950-0065
1951
Haacke, C.H.Haacke, C.H.Geluk Het VlerkeUnknown., 186P.Southwest Africa, NamibiaKimberlite
DS1995-0886
1995
Haak, V.Jiracek, G.R., Haak, V., Olsen, K.H.Methods of investigation: practical magnetotellurics in a continental riftenvironmentContinental Rifts: evolution, structure, tectonics, No. 25, pp. 103-132GlobalGeophysics -magnetotellurics
DS1995-1526
1995
Haak, V.Prodehl, C., Mueller, St., Haak, V.The European Cenozoic rift systemContinental Rifts: evolution, structure, tectonics, No. 25, pp. 133-212.EuropeGeophysics -seismics, magnetics, gravity, Heat flow, structure
DS2003-1172
2003
Haak, V.Ritter, O., Weckmann, U., Victor, T., Haak, V.A magnetotelluric study of the Damara belt in Namibia: 1. regional scale conductivityPhysics of the Earth and Planetary Interiors, Vol. 138, 2, July 16, pp. 71-90.NamibiaGeophysics - magnetics
DS2003-1463
2003
Haak, V.Weckmann, U., Ritter, O., Haak, V.A magnetotelluric study of the Damara belt in Namibia: 2. MT phases over 90 revealPhysics of the Earth and Planetary Interiors, Vol. 138, 2, July 16, pp. 91-112.NamibiaGeophysics - magnetics
DS200412-1673
2003
Haak, V.Ritter, O., Weckmann, U., Victor, T., Haak, V.A magnetotelluric study of the Damara belt in Namibia: 1. regional scale conductivity anomalies.Physics of the Earth and Planetary Interiors, Vol. 138, 2, July 16, pp. 71-90.Africa, NamibiaGeophysics - magnetics
DS200412-2094
2003
Haak, V.Weckmann, U., Ritter, O., Haak, V.A magnetotelluric study of the Damara belt in Namibia: 2. MT phases over 90 reveal the internal structure of the Waterberg FaultPhysics of the Earth and Planetary Interiors, Vol. 138, 2, July 16, pp. 91-112.Africa, NamibiaGeophysics - magnetics
DS2000-0718
2000
Haapala, I.Nyamai, C.M., Haapala, I.A comparison of the uncompahgrite and turjaite mineralogy (phlogopite, melilite) south Nyanza DistrictJournal of African Earth Sciences, p. 68. abstract.KenyaMelilite, Mineralogy
DS2000-0719
2000
Haapala, I.Nyamai, C.M., Haapala, I.Petrochemistry of the melilite bearing uncompahgrite and turjaite rock types South Rangwe Complex, Kenya.Igc 30th. Brasil, Aug. abstract only 1p.Kenya, western KenyaMelilites
DS2002-1164
2002
Haapala, I.Nyamai, C.M., Haapala, I., Ngecu, W.M.A comparison of the uncompahgrite turjaite complex (phlogopite, melilite) of south Nayanza, western Kenya, with similar rock complexes in Asia, Australia, America11th. Quadrennial Iagod Symposium And Geocongress 2002 Held Windhoek, Abstract p. 37.KenyaMelilite
DS2001-0432
2001
Ha'aretzHa'aretzLeviev seeks cut of lucrative Russian rough diamond marketHaaretz, Sept. 24, 1p.RussiaNews item, Africa Israel
DS1992-0642
1992
Haas, J.R.Haas, J.R., Haskin, L.A., Luhr, J.F., Bowring, S.A., Rasskazov, S.Y.Petrogenesis of quaternary basinites from the Bartoy Volcanic Field of the Baikal Rift Zone, Siberia, RussiaEos Transactions, Vol. 73, No. 14, April 7, supplement abstracts p.334Russia, Siberia, RussiaBasinite, Baikal Rift Zone
DS1992-0643
1992
Haase, C.Haase, C.Creating a financially rewarding royaltyPda Digest, Vol. 6, No. 28, Summer p. 1, 3, 4GlobalEconomics, ore reserves, Royalties
DS1993-0608
1993
Haase, C.Haase, C.The art of creating a financially rewarding royalty: Part II. Net profitsroyaltiesProspectors and Developers Association of Canada (PDAC) Digest, Vol. 6, No. 30, Summer p. 2, 4, 5CanadaEconomics, Net Profits Royalty, NCR.
DS2003-0660
2003
Haase, K.John, T., Schenk, V., Haase, K., Scherer, E., Tembe, F.Evidence for a Neoproterozoic ocean in south central Africa from mid oceanic ridgeGeology, Vol. 31, 3, March pp. 243-6.ZambiaGondwana, suture zones, Rodinia, Geothermometry
DS2003-0661
2003
Haase, K.John, T., Schenk, V., Haase, K., Scherer, E., Tembo, F.Evidence for a Neoproterozoic ocean in south central Africa from mid ocean ridge typeGeology, Vol. 31, 3, March pp. 243-6.ZambiaEclogites, Geochemistry
DS200412-0919
2003
Haase, K.John, T., Schenk, V., Haase, K., Scherer, E., Tembo, F.Evidence for a Neoproterozoic ocean in south central Africa from mid ocean ridge type geochemical signatures and pressure temperGeology, Vol. 31, 3, March pp. 243-6.Africa, ZambiaEclogite, Geochemistry
DS200412-1939
2004
Haase, K.Stroncik, N.A., Haase, K.Chlorine in oceanic intraplate basalts: constraints on mantle sources and recycling processes.Geochimica et Cosmochimica Acta, 13th Goldschmidt Conference held Copenhagen Denmark, Vol. 68, 11 Supp. July, ABSTRACT p.A567.MantleMagmatic volatiles
DS1996-0578
1996
Haase, K.M.Haase, K.M.The relationship between the age of the lithosphere and the composition of oceanic magmas... melting...Earth and Planetary Science Letters, Vol. 144-1, 2, Oct pp. 75-92.GlobalMantle, Thermal structure
DS1997-0934
1997
Haase, K.M.Puchtel, I.S., Haase, K.M., Nemchin, A.A., et al.Petrology and geochemistry of kimberlite Pipe II of Chigicherla area, Anantapur District, Andhra Pradesh.Geochimica et Cosmochimica Acta, Vol. 61, No. 6, March 1, pp. 1205-Baltic shieldPetrology, Proterozoic mantle plume, Archean continent lithosphere, Tectonics, rifting, Mantle
DS200612-0745
2006
Haase, K.M.Krienitz, M.S., Haase, K.M., Mezger, K., Eckardt, V., Shaikh Mashail, M.A.Magma genesis and crustal contamination of continental intraplate lavas in northwestern Syria.Contributions to Mineralogy and Petrology, Vol. 151, 6, pp. 698-716.Africa, SyriaMagmatism - not specific to diamonds
DS200712-1049
2007
Haase, K.M.Stroncik, N.A., Niedermann, S., Haase, K.M.Neon and helium isotopes as tracers of mantle reservoirs and mantle dynamics.Earth and Planetary Science Letters, Vol. 256, 1-2, June 15, pp. 334-344.MantleGeochronology
DS201012-0788
2010
Haase, K.M.Timm, J., Layne, G.D., Haase, K.M., Barnes, J.D.Chlorine isotope evidence for crustal recycling into the Earth's mantle.Earth and Planetary Science Letters, Vol. 298, 1-2, Sept. 15, pp. 175-182.MantleSubduction
DS201112-0552
2011
Haase, K.M.Krienitz, M-S., Haase, K.M.The evolution of the Arabian lower crust and lithospheric mantle - geochemical constraints from southern Syrian mafic and ultramafic xenoliths.Chemical Geology, Vol. 280, 3-4, pp. 271-283.Asia, ArabiaSubduction
DS201509-0425
2015
Haberland, C.Ryberg, T., Haberland, C., Haberlau, T., Weber, M.H., Klaus, B., Behrmann, J.H., Jokat, W.Crustal structure of northwest Namibia: evidence for plume rift continent interaction.Geology, Vol. 43, 8,pp. 739-Africa, NamibiaPlume, rifting

Abstract: The causes for the formation of large igneous provinces and hotspot trails are still a matter of considerable dispute. Seismic tomography and other studies suggest that hot mantle material rising from the core-mantle boundary (CMB) might play a significant role in the formation of such hotspot trails. An important area to verify this concept is the South Atlantic region, with hotspot trails that spatially coincide with one of the largest low-velocity regions at the CMB, the African large low shear-wave velocity province. The Walvis Ridge started to form during the separation of the South American and African continents at ca. 130 Ma as a consequence of Gondwana breakup. Here, we present the first deep-seismic sounding images of the crustal structure from the landfall area of the Walvis Ridge at the Namibian coast to constrain processes of plume-lithosphere interaction and the formation of continental flood basalts (Paraná and Etendeka continental flood basalts) and associated intrusive rocks. Our study identified a narrow region (<100 km) of high-seismic-velocity anomalies in the middle and lower crust, which we interpret as a massive mafic intrusion into the northern Namibian continental crust. Seismic crustal reflection imaging shows a flat Moho as well as reflectors connecting the high-velocity body with shallow crustal structures that we speculate to mark potential feeder channels of the Etendeka continental flood basalt. We suggest that the observed massive but localized mafic intrusion into the lower crust results from similar-sized variations in the lithosphere (i.e., lithosphere thickness or preexisting structures).
DS201509-0425
2015
Haberlau, T.Ryberg, T., Haberland, C., Haberlau, T., Weber, M.H., Klaus, B., Behrmann, J.H., Jokat, W.Crustal structure of northwest Namibia: evidence for plume rift continent interaction.Geology, Vol. 43, 8,pp. 739-Africa, NamibiaPlume, rifting

Abstract: The causes for the formation of large igneous provinces and hotspot trails are still a matter of considerable dispute. Seismic tomography and other studies suggest that hot mantle material rising from the core-mantle boundary (CMB) might play a significant role in the formation of such hotspot trails. An important area to verify this concept is the South Atlantic region, with hotspot trails that spatially coincide with one of the largest low-velocity regions at the CMB, the African large low shear-wave velocity province. The Walvis Ridge started to form during the separation of the South American and African continents at ca. 130 Ma as a consequence of Gondwana breakup. Here, we present the first deep-seismic sounding images of the crustal structure from the landfall area of the Walvis Ridge at the Namibian coast to constrain processes of plume-lithosphere interaction and the formation of continental flood basalts (Paraná and Etendeka continental flood basalts) and associated intrusive rocks. Our study identified a narrow region (<100 km) of high-seismic-velocity anomalies in the middle and lower crust, which we interpret as a massive mafic intrusion into the northern Namibian continental crust. Seismic crustal reflection imaging shows a flat Moho as well as reflectors connecting the high-velocity body with shallow crustal structures that we speculate to mark potential feeder channels of the Etendeka continental flood basalt. We suggest that the observed massive but localized mafic intrusion into the lower crust results from similar-sized variations in the lithosphere (i.e., lithosphere thickness or preexisting structures).
DS2002-0626
2002
Habermann, D.Habermann, D.Quantitative cathodluminesence ( CL) spectroscopy of minerals: possibilities and limitations.Mineralogy and Petrology, Vol. 76, No. 3-4, pp. 247-60.GlobalTechniques - not specific to diamonds
DS1860-0508
1886
Habersham, W.W.Habersham, W.W.Diamonds in DixieDixie., Vol. 2, PP. 7-8.United States, GeorgiaDiamond Occurrence
DS1981-0280
1981
Habgood, F.Mallick, D.I.J., Habgood, F., Skinner, A.C.A Geological Interpretation of Land sat Imagery and Air Photography of Botswana.Overseas Geol. Min. Resour., No. 56, 39P.BotswanaTectonic, Structure, Kimberlite, Remote Sensing, Tectonics
DS1998-0551
1998
HabibHabib, ShanifThe petrology and geochemistry of Proterozoic ultrapotassic diamond bearing lamprophyre dikes...University of Western Ontario, Msc. thesisNorthwest TerritoriesDikes - Gibson-MacQuoid Lake belt
DS201502-0037
2015
Habtoor, A.Ahmed, A.H., Habtoor, A.Heterogeneously depleted Precambrian lithosphere deduced from mantle peridotites and associated chromitite deposits of Al, Ays ophiolite, northwestern Arabian shield, Saudi Arabia.Ore Geology Reviews, Vol. 67, pp. 279-296.Africa, Saudi ArabiaPeridotite

Abstract: The mantle section of Al'Ays ophiolite consists of heterogeneously depleted harzburgites, dunites and large-sized chromitite pods. Two chromitite-bearing sites (Site1 and Site2), about 10 km apart horizontally from one another, were examined for their upper mantle rocks. Cr-spinels from the two sites have different chemistry; Cr-rich in Site1 and Al-rich in Site2. The average Cr-ratio = (Cr/(Cr + Al) atomic ratio) of Cr-spinels in harzburgites, dunites and chromitites is remarkably high 0.78, 0.77 and 0.87, respectively, in Site1, compared with those of Site2 which have intermediate ratio averages 0.5, 0.56 and 0.6, respectively. The platinum-group elements (PGE) in chromitites also show contrasting patterns from Site1 to Site2; having elevated IPGE (Os, Ir, Ru) and strongly depleted in PPGE (Rh, Pt, Pd) with steep negative slopes in the former, and gentle negative slopes in the latter. The oxygen fugacity (?log fO2) values deduced from harzburgites and dunites of Site1 show a wide variation under reducing conditions, mostly below the FMQ buffer. The Site2 harzburgites and dunites, on the other hand are mostly above the FMQ buffer. Two magmatic stages are suggested for the lithospheric evolution of Al'Ays ophiolite in response to a switch of tectonic setting. The first stage produced a peridotites–chromitites suite with Al-rich Cr-spinels, possibly beneath a mid-ocean ridge setting, or most likely in back-arc rift of a supra-subduction zone setting. The second stage involved higher degrees of partial melting, produced a peridotites–chromitites suite with Cr-rich Cr-spinels, possibly in a fore-arc setting. The coexistence of compositionally different mantle suites with different melting histories in a restricted area of an ophiolite complex may be attributable to a mechanically juxtaposed by mantle convection during recycling. The mantle harzburgites and dunites are apt to be compositionally modified during recycling process; being highly depleted (Site1 case) than their original composition (Site2 case).
DS200712-0399
2007
Hack, A.C.Hack, A.C., Hermann, J., Mavrogenes, J.A.Mineral solubility and hydrous melting relations in the deep earth: analysis of some binary A-H2O system pressure-temperature composition topologies.American Journal of Science, Vol. 307, 5, pp. 833-855.MantleMelting - water
DS200812-0439
2008
Hack, A.C.Hack, A.C., Thompson, A.B.Quantification of dehydration and mass fluxes from subducting slabs.Goldschmidt Conference 2008, Abstract p.A339.MantleSubduction
DS201112-0399
2011
Hack, A.C.Hack, A.C., Thompson, A.B.Density and viscosity of hydrous magmas and related fluids and their role in subduction zone processes.Journal of Petrology, Vol. 52, 7-8, pp. 1333-1362.MantleSubduction
DS1940-0048
1942
Hack, J.T.Hack, J.T.Sedimentation and Volcanism in the Hopi Buttes, ArizonaGeological Society of America (GSA) Bulletin., Vol. 53, PP. 335-372.United States, Arizona, Colorado PlateauDiatreme
DS2001-1316
2001
Hacker, B.Zhou, D., Grhan, S.A., Chang, E.Z., Wang, B., Hacker, B.Paleozoic tectonic amalgamation of the Chinese Tian Shan: evidence from a transect along the Dushanzi-KugaGeological Society of America Memoir, No. 194, pp. 23-46.ChinaTectonics
DS200512-0385
2005
Hacker, B.Hacker, B., Luffi, P., Lutkov, V., Minaev, Metcalfe, Ratschbacher, Plank, Ducea, Patinodouce, McWiliamsNear ultrahigh pressure processing of continental crust: Miocene crustal xenoliths from the Pamir.Journal of Petrology, Vol. 46, 8, pp. 1661-1687.Asia, PamirXenoliths
DS200612-0515
2006
Hacker, B.Hacker, B., O'Brien, P.Continental crust subduction and recycling.Goldschmidt Conference 16th. Annual, S5-08 theme abstract 1/8p. goldschmidt2006.orgMantleSubduction
DS1994-0495
1994
Hacker, B.R.Ernst, W.G., Liou, J.G., Hacker, B.R.Petrotectonic significance of high and ultrahigh pressure metamorphicbelts: subduction zone historiesInternational Geology Review, Vol. 30, pp. 213-237United States, California, China, Dabie, Russia, KoreaTectonics, metamorphism
DS1995-0710
1995
Hacker, B.R.Hacker, B.R.What brought them up? Exhumation of ultrahigh pressure rocks in the Dabie Mountains of eastern China.Eos, Abstracts, Vol. 76, No. 17, Apr 25, p. S 283.ChinaCoesite, diamonds, metamorphic, Deposit -Dabie Mountains
DS1995-0711
1995
Hacker, B.R.Hacker, B.R., Qingchen WangArgon-Argon geochronology of ultrahigh pressure metamorphism in central China.Tectonics, Vol. 14, No. 4, August pp. 994-1006.ChinaGeochronology, Argon, Deposit -Dabie Shan area
DS1995-0712
1995
Hacker, B.R.Hacker, B.R., Ratschbacher, L., Webb, L., Shuwen, D.What brought them up? Exhumation of the Dabie Shan ultrahigh pressurerocks.Geology, Vol. 23, No. 8, August pp. 743-746.ChinaCoesite, diamond, Deposit -Dabie Shan area
DS1996-0579
1996
Hacker, B.R.Hacker, B.R., Zhang, R.Y.Very high pressure (10-15GPA) inclusions in ultrahigh pressure (4GPA)Chinese rocks.Geological Society of America, Abstracts, Vol. 28, No. 7, p. A-69.ChinaMetamorphic rocks
DS1998-0552
1998
Hacker, B.R.Hacker, B.R., Ratschacher, L., Shuwen, D.uranium-lead (U-Pb) zircon ages constrain the architecture of the ultrahigh pressure Qinling Dabie Orogen, China.Earth and Planetary Science Letters, Vol. 161, No. 1-4, Sept. 1, pp. 215-230.ChinaGeochronology, Dabie Shan area
DS2000-0375
2000
Hacker, B.R.Hacker, B.R., Andersen, T.B., Vasquez, A.M., Root, D.B.Exhumation of Norwegian ultra high pressure (UHP) eclogites: II. Plutonism and extension beneath the Solund Basin.Geological Society of America (GSA) Abstracts, Vol. 32, No. 7, p.A-32.NorwayEclogites, Subduction - slab
DS2000-0376
2000
Hacker, B.R.Hacker, B.R., Ratschbacher, L., Chateigner, D.Exhumation of the ultrahigh pressure continental crust in east central China: Late Triassic -Early JurassicJournal of Geophysical Research, Vol. 105, No. 6, June 10, pp. 13339-Chinaultra high pressure (UHP)
DS2000-0798
2000
Hacker, B.R.Ratschbacher, L., Hacker, B.R., Wenk, H-R.Exhumation of the ultrahigh pressure continental crust in east central China: Cretaceous and Cenozoic unroof..Journal of Geophysical Research, Vol. 105, No. 6, June 10, pp. 13303-20.Chinaultra high pressure (UHP)
DS2000-0999
2000
Hacker, B.R.Walsh, E.H., Hacker, B.R.Exhumation of Norwegian ultra high pressure (UHP) eclogites 1: foreland to hinterland regional variation in pressure - temperatureGeological Society of America (GSA) Abstracts, Vol. 32, No. 7, p.A-32.NorwayEclogites, Subduction - slab
DS2001-1045
2001
Hacker, B.R.Searle, M., Hacker, B.R., Bilham, R.The Hindu Kush seismic zone as a paradigm for the creation of ultrahigh pressure pressure diamond and coesite ...Journal of Geology, Vol. 109, pp. 143-53.Mantleultra high pressure (UHP) continental rocks, Subduction - ophiolites
DS2002-0627
2002
Hacker, B.R.Hacker, B.R., Calvert, A., Zhang, R.Y., Ernst, W.G., Liou, J.G.Ar Ar geochronology of diamond bearing metasedimentary rocks from the Kokchetav Massif.Frontiers Science Series, University Academy Press, Vol. 38, pp. 397-412.RussiaGeochronology
DS2002-0628
2002
Hacker, B.R.Hacker, B.R., Grove, M.Was UHP tectonism in Norway caused by ophiolite emplacement?Geological Society of America Annual Meeting Oct. 27-30, Abstract p. 511.NorwayUHP - not specific to diamonds
DS2003-0527
2003
Hacker, B.R.Hacker, B.R., Anderson, T.B., Root, D.B., Mehl, L., Mattinson, J.M., WoodenExhumation of high pressure rocks beneath the Solund Basin, Western gneiss regionJournal of Metamorphic Geology, Vol. 21, 6, pp. 613-30.NorwayUHP
DS2003-0528
2003
Hacker, B.R.Hacker, B.R., Calvert, A., Zhang, R.Y., Ernst, W.G., Liou, J.G.Ultrarapid exhumation of ultrahigh pressure diamond bearing metasedimentary rocks ofLithos, Vol. 70, 3-4, pp. 61-75.Russia, KazakhstanUHP
DS200412-0758
2003
Hacker, B.R.Hacker, B.R., Anderson, T.B., Root, D.B., Mehl, L., Mattinson, J.M., Wooden, J.L.Exhumation of high pressure rocks beneath the Solund Basin, Western gneiss region, Norway.Journal of Metamorphic Geology, Vol. 21, 6, pp. 613-30.Europe, NorwayUHP
DS200412-0759
2002
Hacker, B.R.Hacker, B.R., Calvert, A., Zhang, R.Y., Ernst, W.G., Liou, J.G.Ar Ar geochronology of diamond bearing metasedimentary rocks from the Kokchetav Massif.Frontiers Science Series, University Academy Press, Vol. 38, pp. 397-412.RussiaGeochronology
DS200412-0760
2003
Hacker, B.R.Hacker, B.R., Calvert, A., Zhang, R.Y., Ernst, W.G., Liou, J.G.Ultrarapid exhumation of ultrahigh pressure diamond bearing metasedimentary rocks of the Kokchetav Massif, Kazakhstan?Lithos, Vol. 70, 3-4, pp. 61-75.Russia, KazakhstanUHP
DS200412-2074
2004
Hacker, B.R.Walsh, E.O., Hacker, B.R.The fate of subducted continental margins; two stage exhumation of the high pressure ultrahigh pressure Western Gneiss region, NJournal of Metamorphic Geology, Vol. 22, 7, pp. 671-687.Europe, NorwayUHP - metamorphism, eclogites
DS200512-0910
2005
Hacker, B.R.Root, D.B., Hacker, B.R., Gans, P.B., Ducea, E.A., Eide, J.L.Discrete ultrahigh prssure domains in the Western Gneiss region, Norway: implications for formation and exhumation.Journal of Metamorphic Geology, Vol. 23, 1, pp. 45-61.Europe, NorwayUHP
DS200612-0516
2006
Hacker, B.R.Hacker, B.R.Duration of UHP tectonism.Geochimica et Cosmochimica Acta, Vol. 70, 18, p. 1. abstract only.MantleUHP, tectonics
DS200612-0517
2006
Hacker, B.R.Hacker, B.R., McClelland, W.C., Liou, J.G.Ultrahigh pressure metamorphism: deep continental subduction.Geological Society of America, Special Paper, No. 403, 200p.China, RussiaUHP, geochronology, subduction
DS200612-0518
2006
Hacker, B.R.Hacker, B.R., Wallis, S.R., Ratschbacher, L., Grove, M., Gehrels, G.High temperature geochronology constraints on the tectonic history and architecture of the ultrahigh pressure Dabie-Sulu Orogen.Tectonics, Vol. 25, 5, TC5006ChinaUHP, tectonics
DS200612-1130
2006
Hacker, B.R.Ratschbacher, L., Franz, L., Enkelmann, E., Jonckheere, R., Porschke, A., Hacker, B.R., Dong, S., Zhang, Y.The Sino-Korean Yangtze suture, the Huwan detachment and the Paleozoic Tertiary exhumation of ultra high pressure rocks along the Tongbai Xinxian Dabie Mtns.Geological Society of America, Special Paper, No. 403, pp. 45-76.ChinaUHP
DS200712-0400
2006
Hacker, B.R.Hacker, B.R.Pressures and temperatures of ultrahigh pressure metamorphism: implications for UHP tectonics and H2O in subducting slabs.International Geology Review, Vol. 48, 12, pp. 1053-1066.MantleUHP, subduction
DS200812-0328
2007
Hacker, B.R.Ernst, W.G., Hacker, B.R., Liou, J.G.Petrotectonics of ultrahigh pressure crustal and upper-mantle rocks - implications for Phanerozoic collisional orogens.Geological Society of America, Whence the Mountains? Inquiries into the evolution of orogenic system., pp. 27-49.MantleUHP subduction
DS200912-0275
2009
Hacker, B.R.Hacker, B.R., Wallis, S.R., McWilliams, M.O., Gans, P.B.40 Ar 39AR constraints on the tectonic history and architecture of the ultrahigh pressure Sulu orogen.Journal of Metamorphic Geology, Vol. 27, 9, pp. 827-844.ChinaUHP
DS200912-0421
2009
Hacker, B.R.Kylander Clar, A.R.C., Hacker, B.R., Johnson, C.M., Beard, B.L., Mahlen, N.Slow subduction of a thick ultrahigh pressure terrane.Tectonics, Vol. 28, 2, TC2003MantleUHP
DS201112-0300
2011
Hacker, B.R.Ellis, S.M., Little,T.A., Wallace, L.M.,Hacker, B.R., Buiter, S.J.H.Feedback between rifting and diapirism can exhume ultrahigh pressure rocks.Earth and Planetary Science Letters, Vol. 311, 3-4, pp. 427-438.AustraliaUHP
DS201112-0400
2011
Hacker, B.R.Hacker, B.R., Kelemen, P.B., Behn, M.D.Differentiation of the continental crust by relamination.Earth and Planetary Science Letters, Vol. 307, 3-4, pp. 501-516.MantleSubduction, bulk analyis
DS201112-1076
2011
Hacker, B.R.Van Keken, P.E., Hacker, B.R., Syracuse, E.M.,Abers, G.A.Subduction factory: 4. Depth dependent flux of H2O from subducting slabs worldwide.Journal of Geophysical Research, Vol. 116, B01401.MantleSubduction
DS201212-0055
2012
Hacker, B.R.Barcheck, C.G., Wiens, D.A., VanKeken, P.E., Hacker, B.R.The relationship of intermediate and deep focus seismicity to the hydration and dehydration of subducting slabs.Earth and Planetary Science Letters, Vol. 349-350 pp. 153-160.MantleSubduction
DS201212-0277
2012
Hacker, B.R.Hacker, B.R., Abers, G.A.Subduction factory 5: Unusually low Poisson's ratios in subduction zones from elastic anisotropy of peridotite.Journal of Geophysical Research, Vol. 117, B6, B06308.MantleSubduction
DS201212-0390
2012
Hacker, B.R.Kylander-Clark, A.R.C., Hacker, B.R., Mattinson, C.G.Size and exhumation rate of ultrahigh pressure terranes linked to orogenic stage.Earth and Planetary Science Letters, Vol. 321-322, pp. 115-120.MantleUHP
DS201312-0348
2013
Hacker, B.R.Hacker, B.R., Gerya, T.V.Paradigms, new and old, for ultrahigh-pressure tectonism.Tectonophysics, Vol. 603, pp. 79-88.MantleUHP
DS201312-0349
2013
Hacker, B.R.Hacker, B.R., Gerya, T.V., Gilotti, J.Formation and exhumation of ultrahigh pressure terranes.Elements, Vol. 9, 4, pp. 289-293.MantleUHP
DS201507-0314
2015
Hacker, B.R.Hacker, B.R., Kelemen, P.B., Behn, M.D.Continental lower crust.Annual Review of Earth and Planetary Sciences, Vol. 43, pp. 167-205.MantleSubduction
DS201607-1298
2016
Hacker, B.R.Hacker, B.R., Kelemen, P.B., Behn, M.D.Continental lower crust.Annual Review of Earth and Planetary Sciences, Vol. 43, pp. 167-205.MantleMagmatism

Abstract: The composition of much of Earth's lower continental crust is enigmatic. Wavespeeds require that 10 -20% of the lower third is mafic, but the available heat-flow and wavespeed constraints can be satisfied if lower continental crust elsewhere contains anywhere from 49 to 62 wt% SiO2. Thus, contrary to common belief, the lower crust in many regions could be relatively felsic, with SiO2 contents similar to andesites and dacites. Most lower crust is less dense than the underlying mantle, but mafic lowermost crust could be unstable and likely delaminates beneath rifts and arcs. During sediment subduction, subduction erosion, arc subduction, and continent subduction, mafic rocks become eclogites and may continue to descend into the mantle, whereas more silica-rich rocks are transformed into felsic gneisses that are less dense than peridotite but more dense than continental upper crust. These more felsic rocks may rise buoyantly, undergo decompression melting and melt extraction, and be relaminated to the base of the crust. As a result of this refining and differentiation process, such relatively felsic rocks could form much of Earth's lower crust.
DS201706-1062
2017
Hacker, B.R.Albers, G.A., van Keken, P.E., Hacker, B.R.The cold and relatively dry nature of mantle forearcs in subduction zones.Nature Geoscience, Vol. 10, 5, pp. 333-337.Mantlesubduction

Abstract: Some of Earth's coldest mantle is found in subduction zones at the tip of the mantle wedge that lies between the subducting and overriding plates. This forearc mantle is isolated from the flow of hot material beneath the volcanic arc, and so is inferred to reach temperatures no more than 600 to 800 °C — conditions at which hydrous mantle minerals should be stable. The forearc mantle could therefore constitute a significant reservoir for water if sufficient water is released from the subducting slab into the mantle wedge. Such a reservoir could hydrate the plate interface and has been invoked to aid the genesis of megathrust earthquakes and slow slip events. Our synthesis of results from thermal models that simulate the conditions for subduction zones globally, however, indicates that dehydration of subducting plates is too slow over the life span of a typical subduction zone to hydrate the forearc mantle. Hot subduction zones, where slabs dehydrate rapidly, are an exception. The hottest, most buoyant forearcs are most likely to survive plate collisions and be exhumed to the surface, so probably dominate the metamorphic rock record. Analysis of global seismic data confirms the generally dry nature of mantle forearcs. We conclude that many subduction zones probably liberate insufficient water to hydrate the shallower plate boundary where great earthquakes and slow slip events nucleate. Thus, we suggest that it is solid-state processes and not hydration that leads to weakening of the plate interface in cold subduction zones.
DS201707-1298
2017
Hacker, B.R.Abers, G.A., van Keken, P.E., Hacker, B.R.The cold and relatively dry nature of mantle forearcs in subduction zones.Nature Geoscience, Vol. 10, pp. 333-337.Mantlesubduction

Abstract: Some of Earth's coldest mantle is found in subduction zones at the tip of the mantle wedge that lies between the subducting and overriding plates. This forearc mantle is isolated from the flow of hot material beneath the volcanic arc, and so is inferred to reach temperatures no more than 600 to 800 °C - conditions at which hydrous mantle minerals should be stable. The forearc mantle could therefore constitute a significant reservoir for water if sufficient water is released from the subducting slab into the mantle wedge. Such a reservoir could hydrate the plate interface and has been invoked to aid the genesis of megathrust earthquakes and slow slip events. Our synthesis of results from thermal models that simulate the conditions for subduction zones globally, however, indicates that dehydration of subducting plates is too slow over the life span of a typical subduction zone to hydrate the forearc mantle. Hot subduction zones, where slabs dehydrate rapidly, are an exception. The hottest, most buoyant forearcs are most likely to survive plate collisions and be exhumed to the surface, so probably dominate the metamorphic rock record. Analysis of global seismic data confirms the generally dry nature of mantle forearcs. We conclude that many subduction zones probably liberate insufficient water to hydrate the shallower plate boundary where great earthquakes and slow slip events nucleate. Thus, we suggest that it is solid-state processes and not hydration that leads to weakening of the plate interface in cold subduction zones.
DS200712-1071
2006
Hackney, R.Tassera, A., Swain, C., Hackney, R., Kirby, J.Elastic thickness structure of South America estimated using wavelets and satellite - derived gravity data.Earth and Planetary Science Letters, in press availableSouth AmericaGeophysics - gravity Bouguer slab
DS1997-0462
1997
Hackspacher, P.C.Hackspacher, P.C., Dantas, E.L., Legrand, J.M.Northwestern Over thrusting and related lateral escape during the Brasiliano Orogeny north of Patos lineamentInternational Geology Review, Vol. 39, No. 7, July, pp. 609-638.Brazil, BorboremaTectonics, Orogeny
DS1998-0553
1998
Hackspacher, P.C.Hackspacher, P.C., Godoy, A.M.Vertical displacement during post collisional escape tectonism ( BrasilianoOrogeny) of the Ribeira Belt.Journal of African Earth Sciences, Vol. 27, 1A, p. 99. AbstractBrazilTectonics, Orogeny
DS1999-0279
1999
Hackspacher, P.C.Hackspacher, P.C., Godoy, A.M.Vertical displacement during late collisional escape tectonics (BrasilianoOrogeny) in the Ribeira Belt.Journal of African Earth Sciences, Vol. 29, No. 1, July pp. 25-32.Brazil, Sao PauloTectonics, Orogeny
DS200412-0405
2004
Hackspacher, P.C.Dantas, E.L., Van Schmus, W.R., Hackspacher, P.C., Fetter, A.H., De Brito Neves, B.B., Cordani, U., Nutman, A.The 3.4 3.5 Ga Sao Jose do Campestre Massif, NE Brazil: remnants of the oldest crust in South America.Precambrian Research, Vol. 130, 1-4, April 20, pp. 113-137.South America, BrazilGeochronology, Borborema
DS201903-0502
2019
Hackspacher, P.C.da Silva, B.V., Hackspacher, P.C., Siqueira Riberio, M.C., Glasmacher, U.A., Goncalves, A.O., Doranti-Tiritan, C., de Godoy, D.F., Constantino, R.R.Evolution of the southwestern Angolan margin: episodic burial and exhumation is more realistic than long term denudation.International Journal of Earth Sciences, Vol. 108, pp. 89-113.Africa, Angolathermochronology

Abstract: There are two main points of view regarding how continental margins evolve. The first one argues that the present-day margins have been developed by long-term denudation since a major exhumation episode, probably driven by rifting or another relevant tectonic event. The second one argues that continental margins underwent alternating burial and exhumation episodes related to crustal tectonic and surface uplift and subsidence. To demonstrate that the proximal domain of the southwestern Angolan margin has evolved in a polycyclic pattern, we present a review of geological and thermochronological information and integrate it with new combined apatite fission-track and (U-Th)/He data from Early Cretaceous volcanic and Precambrian basement samples. We also provide hypotheses on the possible mechanisms able to support the vertical crustal movements of this margin segment, which are also discussed based on some modern rifting models proposed for Central South Atlantic. The central apatite fission-track ages range from 120.6?±?8.9 to 272.9?±?21.6 Ma, with the mean track lengths of approximately 12 µm. The single-grain apatite (U-Th)/He ages vary between 52.2?±?1 and 177.2?±?2.6 Ma. The integration of the thermochronological data set with published geological constraints supports the following time-temperature evolution: (1) heating since the Carboniferous-Permian, (2) cooling onset in the Early Jurassic, (3) heating onset in the Early Cretaceous, (4) cooling onset in the Mid- to Late Cretaceous, (5) heating onset in the Late Cretaceous, and (6) cooling onset in the Oligocene-Miocene. The thermochronological data and the geological constraints, support that the proximal domain of the southwestern Angolan margin was covered in the past by pre-, syn-, and post-rift sediments, which were eroded during succeeding exhumation events. For this margin segment, we show that a development based on long-term denudation is less realistic than one based on burial and exhumation episodes during the last 130 Myr.
DS202007-1144
2020
Haddock, D.Haddock, D., Manya, S., Brown, R.J., Jones, T.J., Wadsworth, F.B., Dobson, K.J., Gernon, T.M.Syn-eruptive agglutination of kimberlite volcanic ash. PyroclastsVolcanica, Vol. 3, 1, pp. 169-182. PdfAfrica, Tanzaniadeposit - Igwisi Hills

Abstract: Pyroclastic deposits of the Holocene Igwisi Hills kimberlite volcanoes, Tanzania, preserve unequivocal evidence for rapid, syn-eruptive agglutination. The unusual pyroclasts are composed of ash-sized particles agglutinated to each other by thin necks. The textures suggest the magma was disrupted into droplets during ascent. Collisions between particles occurred within a volcanic plume and on deposition within the conduit to form a weakly agglutinated, porous pyroclastic deposit. Theoretical considerations indicate that agglutination occurred over short timescales. Agglutinated clasts were entrained into weak volcanic plumes and deposited around the craters. Our results support the notion that agglutination can occur during kimberlite eruptions, and that some coherent, dense rocks in ancient kimberlite pipes interpreted as intrusive rocks could instead represent agglutinated pyroclastic rocks. Differentiating between agglutinated pyroclastic rocks and effusive or intrusive rocks in kimberlite pipes is important because of the potential effects that pyroclastic processes might have on diamond concentrations in deposits.
DS202011-2040
2020
Haddock, D.Haddock, D., Manya, S., Brown, R.J., Jones, T.J., Wadsworth, F.B., Dobson, K.J., Gernon, T.M.Syn-eruptive agglutination of kimberlite volcanic ash.Volcanica, 15p. PdfAfrica, Tanzaniadeposit - Igwisi Hills kimberlite

Abstract: Pyroclastic deposits of the Holocene Igwisi Hills kimberlite volcanoes, Tanzania, preserve unequivocal evidence for rapid, syn-eruptive agglutination. The unusual pyroclasts are composed of ash-sized particles agglutinated to each other by thin necks. The textures suggest the magma was disrupted into droplets during ascent. Collisions between particles occurred within a volcanic plume and on deposition within the conduit to form a weakly agglutinated, porous pyroclastic deposit. Theoretical considerations indicate that agglutination occurred over short timescales. Agglutinated clasts were entrained into weak volcanic plumes and deposited around the craters. Our results support the notion that agglutination can occur during kimberlite eruptions, and that some coherent, dense rocks in ancient kimberlite pipes interpreted as intrusive rocks could instead represent agglutinated pyroclastic rocks. Differentiating between agglutinated pyroclastic rocks and effusive or intrusive rocks in kimberlite pipes is important because of the potential effects that pyroclastic processes might have on diamond concentrations in deposits.
DS1988-0280
1988
Haddon, R.A.W.Haddon, R.A.W., Buchbinder, G.G.R.Seismic wave scattering and the earth's structure in the lower mantleAmerican Geophysical Union (AGU) Monograph, Structure and dynmaics of earth's deep interior, No. 46, Conference Information 19th. IUGG, pp. 65-71GlobalMantle, Geophysics -seismics
DS1993-0609
1993
Haddon, R.C.Haddon, R.C.Chemistry of the fullerenes: the manifestations of strain in a class of continuous aromatic molecules.Science, Vol. 261, No. 5128, September 17, pp. 1545-1550.GlobalFullerenes, Chemistry
DS1994-0689
1994
Haddon, R.C.Haddon, R.C.From the outside in- fullerenesNature, Vol. 367, January 20, pp. 214.GlobalCarbon cycle
DS1994-0690
1994
Haddon, R.C.Haddon, R.C.Fullerenes: from the outside inNature, Vol. 367, No. 6460, January 20, p. 214.GlobalFullerenes
DS1995-0713
1995
Haddon, R.C.Haddon, R.C.Magnetism of the carbon allotropesNature, Vol. 378, Nov. 10, pp. 249-255.GlobalMagnetism, Graphite, diamond, fullerenes
DS1989-0528
1989
Hadezhdina, Ye.D.Gorogotskaya, L.I., Kvasnitsa, V.N., Hadezhdina, Ye.D.Orientation relations of graphite-lonsdaleite-diamond during natural transformations in shock waves.(Russian)Mineral. Zhurn., (Russian), Vol. 11, No. 1, pp. 26-33RussiaLonsdaleite, Mineraloggy
DS201412-0328
2014
Hadfield, C.Hadfield, C.A rock from the deep beyond. .. PallasiteNational Post, May 28, 2p.TechnologyMeteorite
DS2003-1123
2003
Hadlari, T.Rainbird, R.H., Hadlari, T., Aspler, L.B., Donaldson, J.A., Le Cheminant, A.N.Sequence stratigraphy and evolution of the Paleoproterozoic intracontinental BakerPrecambrian Research, Vol. 125, 1-2, pp. 21-53.NunavutBlank
DS200412-1609
2003
Hadlari, T.Rainbird, R.H., Hadlari, T., Aspler, L.B., Donaldson, J.A., Le Cheminant, A.N., Peterson, T.D.Sequence stratigraphy and evolution of the Paleoproterozoic intracontinental Baker Lake and The lon Basins, western Churchill ProPrecambrian Research, Vol. 125, 1-2, pp. 21-53.Canada, NunavutGeology
DS1984-0330
1984
Hadley, W.D.Hadley, W.D.A New Look at Idar ObersteinRock And Gem., Vol. 14, No. 10, PP. 48-51.GermanyCutting Industry
DS200612-0519
2006
Hae, R.Hae, R., Ohtani, E., Kubo, T., Koyama, T., Utada, H.Hydrogen diffusivity in wadsleyite and water distribution in the mantle transition zone.Earth and Planetary Science Letters, Vol. 243,1-2, Mar. 15, pp. 141-148.MantleIR spectroscopy
DS1986-0326
1986
Haebig, A.E.Haebig, A.E., Jackson, D.G.Geochemical expression of some west Australian kimberlites andlamproitesProceedings of the Fourth International Kimberlite Conference, Held Perth, Australia, No. 16, pp. 466-468AustraliaDiamond exploration
DS1989-0345
1989
Haebig, A.E.Deakin, A.S., Boxer, G.L., Meakins, A.E., Haebig, A.E., Lew, J.H.Geology of the Argyle alluvial diamond deposits #2Geological Society of Australia Inc. Blackwell Scientific Publishing, No. 14, Vol. 2, pp. 1108-1116AustraliaAlluvial-placers, Deposit -Argyle
DS1991-1608
1991
Haebig, A.E.Smith, C.B., Haebig, A.E., Hall, A.E.Patterns of diamond and kimberlite indicator mineral dispersal in the Kimberley region, western AustraliaProceedings of Fifth International Kimberlite Conference held Araxa June 1991, Servico Geologico do Brasil (CPRM) Special, pp. 376-379AustraliaHeavy mineral sampling, weathering, Lamproites, kimberlites, Argyle type diamonds
DS1986-0174
1986
Haebig, E.Deakin, A.S., Boxer, G.L., Meakins, A.E., Haebig, E., Lew, J.H.Geology of the Argyle alluvial diamond deposits #1Proceedings of the Fourth International Kimberlite Conference, Held, No. 16, pp. 451-453AustraliaDiamond exploration
DS201012-0318
2010
Haemycong, J.Jaesok, L., Haemycong, J.Lattice preferred orientation of olivine in garnet peridotites from Finsch, South Africa.International Mineralogical Association meeting August Budapest, abstract p. 216.Africa, South AfricaSpectroscopy
DS201712-2712
2017
Haemyeong, J.H.Nestola, F., Haemyeong, J.H., Taylor, L.A.Mineral inclusions in diamonds may be synchronous but not syngenetic.Nature Communications, Vol. 8, # 14168Technologydiamond inclusions

Abstract: It is widely assumed that mineral inclusions and their host diamonds are ‘syngenetic’ in origin, which means that they formed simultaneously and from the same chemical processes. Mineral inclusions that, instead, were formed earlier with respect to diamonds are termed protogenetic. However, minerals can have the same age as the diamonds in that they become enclosed in and isolated from any further isotopic exchange. But this is termed ‘synchronous’ not ‘syngenetic’. Here we demonstrate conclusively the protogenesis of inclusions in diamonds, based upon data from an exceptional fragment of a diamond-bearing peridotite, its clinopyroxene and a gem-quality diamond. Clinopyroxenes in the xenolith had the same chemistry and crystallographic orientation as those for inclusions in the diamond. With our results with garnets, olivines and sulfides, we can state that a major portion of the mineral inclusions in non-coated, monocrystalline-lithospheric diamonds are protogenetic. Our discovery here presented has implications for all genetic aspects of diamond growth, including their ages.
DS201312-0202
2013
Haenecour, P.DeBaille, V., O'Neill, C., Brandon, A.D., Haenecour, P., Yin, Q-Z., Mattielli, N., Trieman, A.H.Stagnant lid tectonics in early Earth revealed bu 142 Nd variations in late Archean rocks.Earth and Planetary Science Letters, Vol. 373, pp. 83-92.MantleConvection
DS201904-0791
2019
Haenen, K.Vanpoucke, D.E.P., Nicely, S.S., Raymakers, J., Maes, W., Haenen, K.Can europium atoms form luminescent centres in diamond: a combined theoretical-experimental study.Diamond and Related Materials, https://doi.org/j. diamond.2019.02.024Globaldiamond morphology

Abstract: The incorporation of Eu into the diamond lattice is investigated in a combined theoretical-experimental study. The large size of the Eu ion induces a strain on the host lattice, which is minimal for the Eu-vacancy complex. The oxidation state of Eu is calculated to be 3+ for all defect models considered. In contrast, the total charge of the defect-complexes is shown to be negative: -1.5 to -2.3 electron. Hybrid-functional electronic-band-structures show the luminescence of the Eu defect to be strongly dependent on the local defect geometry. The 4-coordinated Eu substitutional dopant is the most promising candidate to present the typical Eu3+ luminescence, while the 6-coordinated Eu-vacancy complex is expected not to present any luminescent behaviour. Preliminary experimental results on the treatment of diamond films with Eu-containing precursor indicate the possible incorporation of Eu into diamond films treated by drop-casting. Changes in the PL spectrum, with the main luminescent peak shifting from approximately 614?nm to 611?nm after the growth plasma exposure, and the appearance of a shoulder peak at 625?nm indicate the potential incorporation. Drop-casting treatment with an electronegative polymer material was shown not to be necessary to observe the Eu signature following the plasma exposure, and increased the background luminescence.
DS201905-1083
2019
Haenen, K.Vanpoucke, D.E.P., Nicley, S.S., Raymakers, J., Maes, W., Haenen, K.Can europium atoms form luminescent centres in diamond: a combined theoretical-experimental study.Diamond & Related Materials, Vol. 94, pp. 233-241.Globalluminescence

Abstract: The incorporation of Eu into the diamond lattice is investigated in a combined theoretical-experimental study. The large size of the Eu ion induces a strain on the host lattice, which is minimal for the Eu-vacancy complex. The oxidation state of Eu is calculated to be 3+ for all defect models considered. In contrast, the total charge of the defect-complexes is shown to be negative: -1.5 to -2.3 electron. Hybrid-functional electronic-band-structures show the luminescence of the Eu defect to be strongly dependent on the local defect geometry. The 4-coordinated Eu substitutional dopant is the most promising candidate to present the typical Eu3+ luminescence, while the 6-coordinated Eu-vacancy complex is expected not to present any luminescent behaviour. Preliminary experimental results on the treatment of diamond films with Eu-containing precursor indicate the possible incorporation of Eu into diamond films treated by drop-casting. Changes in the PL spectrum, with the main luminescent peak shifting from approximately 614?nm to 611?nm after the growth plasma exposure, and the appearance of a shoulder peak at 625?nm indicate the potential incorporation. Drop-casting treatment with an electronegative polymer material was shown not to be necessary to observe the Eu signature following the plasma exposure, and increased the background luminescence.
DS1986-0327
1986
Haensel, J.M.Jr.Haensel, J.M.Jr., Himmelberg, G.R., Ford, A.B.Plagioclase compositional variations in anorthosites of the lower part Of the Dufek intrusionAntarctic Journal of the United States, Vol. 21, No. 5, pp. 61-63AntarcticaDufek
DS1920-0072
1921
Hafer, C.Hafer, C.Placer Gold in IndianaEngineering and Mining Journal, Vol. 111, JUNE 18TH. P. 1023.United States, Indiana, Great LakesBlank
DS201312-0241
2013
Hafid, A.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
DS201312-0511
2013
Hafid, A.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
DS201312-0999
2013
Hafid, A.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
DS201805-0952
2017
Hafid, A.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
DS1997-1003
1997
Hafner, S.S.Scherer, T., Hafner, S.S., et al.Defects in natural diamonds depending on geological environmentProceedings 30th. I.G.C., Pt. 16, pp. 1-15.South Africa, Germany, RussiaDiamond morphology, Deposit - Finsch, Popigai
DS201212-0750
2012
Haga Laksmi, V.Vani, T., Haga Laksmi, V., Ramakrishnarao, M.V., Kelly, G.R., Subbarao, K.V.Integration of geophsyical and geological dat a of kimberlites in Narayayanapet - Maddur field, Andhra Pradesh, India.10th. International Kimberlite Conference Feb. 6-11, Bangalore India, AbstractIndia, Andhra PradeshDeposit - Narayayanapet-Maddur
DS201412-0475
2014
Hagadorn, J.W.Kosman, C.W., Kopylova, M.G., Hagadorn, J.W., Hurlburt, J.F.First dat a on the Diamondiferous mantle of the Kasai Shield, (Congo Craton) from diamond mineral inclusions.Geological Society of America Conference Vancouver Oct. 19-22, 1p. AbstractAfrica, Democratic Republic of CongoDiamond morphology, inclusions
DS201610-1881
2016
Hagadorn, J.W.Kosman, C.W., Kopylova, M.G., Stern, R.A., Hagadorn, J.W., Hurlbut, J.F.Cretaceous mantle of the Congo craton: evidence from mineral and fluid inclusions in Kasai alluvial diamonds.Lithos, in press available 15p.Africa, Democratic Republic of CongoDeposit - Kasai

Abstract: Alluvial diamonds from the Kasai River, Democratic Republic of the Congo (DRC) are sourced from Cretaceous kimberlites of the Lucapa graben in Angola. Analysis of 40 inclusion-bearing diamonds provides new insights into the characteristics and evolution of ancient lithospheric mantle of the Congo craton. Silicate inclusions permitted us to classify diamonds as peridotitic, containing Fo91-95 and En92-94, (23 diamonds, 70% of the suite), and eclogitic, containing Cr-poor pyrope and omphacite with 11-27% jadeite (6 diamonds, 18% of the suite). Fluid inclusion compositions of fibrous diamonds are moderately to highly silicic, matching compositions of diamond-forming fluids from other DRC diamonds. Regional homogeneity of Congo fibrous diamond fluid inclusion compositions suggests spatially extensive homogenization of Cretaceous diamond forming fluids within the Congo lithospheric mantle. In situ cathodoluminescence, secondary ion mass spectrometry and Fourier transform infrared spectroscopy reveal large heterogeneities in N, N aggregation into B-centers (NB), and d13C, indicating that diamonds grew episodically from fluids of distinct sources. Peridotitic diamonds contain up to 2962 ppm N, show 0-88% NB, and have d13C isotopic compositions from - 12.5‰ to - 1.9‰ with a mode near mantle-like values. Eclogitic diamonds contain 14-1432 ppm N, NB spanning 29%-68%, and wider and lighter d13C isotopic compositions of - 17.8‰ to - 3.4‰. Fibrous diamonds on average contain more N (up to 2976 ppm) and are restricted in d13C from - 4.1‰ to - 9.4‰. Clinopyroxene-garnet thermobarometry suggests diamond formation at 1350-1375 °C at 5.8 to 6.3 GPa, whereas N aggregation thermometry yields diamond residence temperatures between 1000 and 1280 °C, if the assumed mantle residence time is 0.9-3.3 Ga. Integrated geothermobaromtery indicates heat fluxes of 41-44 mW/m2 during diamond formation and a lithosphere-asthenosphere boundary (LAB) at 190-210 km. The hotter-than-average cratonic mantle may be attributable to contemporaneous rifting of the southern Atlantic, multiple post-Archean reactivations of the craton, and/or proximal Cretaceous plumes.
DS201906-1299
2019
Hagedorn, G.Hagedorn, G., Ross, M., Paulen, R., Smith, R., Neudorf, C., Gingerich, T., Lian, O.Ice-flow and deglacial history of the Laurentide Ice sheet in the southwestern Great Slave Lake area.GAC/MAC annual Meeting, 1p. Abstract p. 102.Canada, Northwest Territoriesgeomorphology

Abstract: Limited field studies and sparse chronological constraints in the southwestern Great Slave Lake area creates uncertainties about the Laurentide Ice Sheet (LIS) flow history and deglacial chronology. Improved understanding of the western LIS ice-margin morphology and retreat history is required to refine larger ice-sheet interpretations and timing for northwest drainage of glacial Lake McConnell. Using new field observations and geochronology we establish ice-flow history and better constrain regional deglaciation. Paleo-ice flow indicators (n = 66) show an oldest southwestern flow (230°), an intermediate northwesterly flow (305°), and a youngest westerly flow (250°). Till samples bulk sediment and matrix properties (n = 160) allowed identification of two till units. A lower grey till sourced mainly from local Paleozoic sediments produced clast fabrics indicating a southwesterly flow direction, overlain by a brown till that contained an increased Canadian Shield content with lodged elongate boulders a-axes and boulder-top striation orientations indicating a west to northwest ice-flow direction. Ice-flow results show a clockwise shift in direction interpreted as evidence for ice-divide migration followed by topographically controlled deglacial westward flow influenced by the Mackenzie River valley. Minimum deglacial timing estimates were constrained through optical dating of fine-sand deposits in a well-developed strandline (n = 2) and seven aeolian dunes; ages range from 9.9 ± 0.6 to 10.8 ± 0.7 ka BP. These ages are from dunes located below glacial Lake McConnell maximum water level and may thus provide new local lake level age constraints. Ice retreat is informed by a newly-mapped segment of the Snake River moraine, which is an understudied feature in the region. New ice-flow history and ice-margin retreat interpretations will be integrated into the larger body of work on the western LIS providing more confident conclusions on ice-sheet evolution and meltwater drainage pathways, specifically in the southwestern Great Slave Lake area.
DS201906-1332
2019
Hagedorn, G.Paulen, R., Smith, R., Ross, M., Hagedorn, G., Rice, J.Ice-flow history of the Laurentide Ice sheet in the southwestern Great Slave Lake area, a shield to Cordillera transect.GAC/MAC annual Meeting, 1p. Abstract p. 156. Canada, Northwest Territoriesgeomorphology

Abstract: Fieldwork conducted since 2010 by the Geological Survey of Canada under the GEM programs has revealed a more complex glacial history of the southern Great Slave Lake region of the Northwest Territories than was previously reported. New reconstructions of the Laurentide Ice Sheet paleo-ice flow history have been established from field observations of erosional and/or depositional ice-flow indicators (e.g. striae, bedrock grooves, till clast fabrics, and streamlined landforms), new geochronological constraints, and interpretations of glacial stratigraphy. Three distinct ice-flow phases are consistently observed in areas proximal to the western margin of the Canadian Shield between the Slave River near Fort Smith and Hay River further west. These phases are: 1) an oldest southwest flow; 2) a long-term sustained ice flow to the northwest; and, 3) a youngest west-southwest flow during Late Wisconsin deglaciation, which includes extensions of the Great Slave Lake and Hay River ice streams further east than previous mapped. At Hay River approaching the eastern limit of soft Cretaceous bedrock of the Western Canada Sedimentary Basin, the ice flow pattern no longer shows the aforementioned consistent chronology. From Hay River to the Liard River, near the zone where the Laurentide and Cordilleran ice sheet coalesced, a thinning ice profile, topographic highlands such as the Cameron Hills and Horn Plateau, and the deep basin that Great Slave Lake currently occupies, played a significant role on the dynamics of the Laurentide Ice Sheet during early ice advance, retreat during Marine Isotope Stage 3, Late Wisconsin advance and deglaciation. Other factors, such as increased sediment supply and clay content from Cretaceous shale bedrock were also significant in influencing ice-sheet behaviour. The role of elevated porewater pressures over subglacial clay-rich sediments controlled the extent and dynamics of several discordant ice streams in upland and lowland regions within the study area.
DS2003-0185
2003
Hagelberg, C.R.Bunge, H.P., Hagelberg, C.R., Travis, B.J.Mantle circulation models with variational dat a assimilation: inferring past mantle flowGeophysical Journal International, Vol. 152, No. 2, pp. 280-301.MantleGeophysics - seismics
DS1985-0255
1985
Hageluken, C.Hageluken, C.Mining Industry in Sierra Leone.(in German)Braunkohle, (in German), Vol. 37, No. 1/2. Jan./Feb. pp. 11-18Sierra LeoneDiamond Production, Economics
DS201806-1233
2018
Hageman, L.Koornneef, J.M., Berndsen, M., Hageman, L., Gress, M.U., Timmerman, S., Nikogosian, I., van Bergen, M.J., Chinn, I.L., Harris, J.W., Davies, G.R.Melt and mineral inclusions as messengers of volatile recycling in space and time. ( olivine hosted inclusions)Geophysical Research Abstracts www.researchgate.net, Vol. 20, EGU2018-128291p. AbstractAfrica, South Africadiamond inclusions

Abstract: Changing recycling budgets of surface materials and volatiles by subduction of tectonic plates influence the compositions of Earth’s major reservoirs and affect climate throughout geological time. Fluids play a key role in processes governing subduction recycling, but quantifying the exact fate of volatiles introduced into the mantle at ancient and recent destructive plate boundaries remains difficult. Here, we report on the role of fluids and the fate of volatiles and other elements at two very different tectonic settings: 1) at subduction settings, and 2) within the subcontinental lithospheric mantle (SCLM). We will show how olivine-hosted melt inclusions from subduction zones and mineral inclusions in diamond from the SCLM are used to reveal how changing tectonic settings influence volatile cycles with time. Melt inclusions from the complex Italian post-collisional tectonic setting are used to identify changing subduction recycling through time. The use of CO2 in deeply trapped melt inclusions instead of in lavas or volcanic gases provides a direct estimate of deep recycling, minimizing possible effects of contamination during transfer through the crust. The aim is to distinguish if increased recycling of sediments from the down-going plate at continental subduction settings results in increased deep CO2 recycling or if the increased CO2 flux results from crustal degassing of the overriding plate. Both processes likely affected climate through Earth history but could thus far not be discriminated. The study of mineral inclusions and their host diamonds from the SCLM can link changes in the cycling of carbon-rich fluids and the time and process through which the carbon redistribution took place. We use Sm-Nd isotope techniques to date the mineral inclusions and use the carbon isotope data of the host diamonds to investigate the growth conditions. I will present case-studies of peridotitic and eclogitic diamonds from three mines in Southern Africa.
DS1990-0628
1990
Hagen, H.Hagen, H., Neumann, E-R.Modelling of trace element distribution in magma chambers using open systemmodelsComputers and Geosciences, Vol. 16, No. 4, pp. 549-586GlobalComputer, Program -trace elements
DS201611-2132
2016
Hagen-Peter, G.A.Poletti, J.E., Cottle, J.M., Hagen-Peter, G.A., Lackey, J.S.Petrochronological constraints on the origin of the Mountain Pass ultrapotassic and carbonatite intrusive suite, California.Journal of Petrology, In press available, 44p.United States, CaliforniaCarbonatite

Abstract: Rare earth element (REE) ore-bearing carbonatite dikes and a stock at Mountain Pass, California, are spatially associated with a suite of ultrapotassic plutonic rocks, and it has been proposed that the two are genetically related. This hypothesis is problematic, given that existing geochronological constraints indicate that the carbonatite is ~15-25 Myr younger than the ultrapotassic rocks, requiring alternative models for the formation of the REE ore-bearing carbonatite during a separate event and/or via a different mechanism. New laser ablation split-stream inductively coupled plasma mass spectrometry (LASS-ICP-MS) petrochronological data from ultrapotassic intrusive rocks from Mountain Pass yield titanite and zircon U-Pb dates from 1429?±?10 to 1385?±?18?Ma, expanding the age range of the ultrapotassic rocks in the complex by ~20 Myr. The ages of the youngest ultrapotassic rocks overlap monazite Th-Pb ages from a carbonatite dike and the main carbonatite ore body (1396?±?16 and 1371?±?10?Ma, respectively). The Hf isotope compositions of zircon in the ultrapotassic rocks are uniform, both within and between samples, with a weighted mean eHfi of 1•9?±?0•2 (MSWD?=?0•9), indicating derivation from a common, isotopically homogeneous source. In contrast, in situ Nd isotopic data for titanite in the ultrapotassic rocks are variable (eNdi?=?-3•5 to -12), suggesting variable contamination by an isotopically enriched source. The most primitive eNdi isotopic signatures, however, do overlap eNdi from monazite (eNdi?=?-2•8?±?0•2) and bastnäsite (eNdi?=?-3•2?±?0•3) in the ore-bearing carbonatite, suggesting derivation from a common source. The data presented here indicate that ultrapotassic magmatism occurred in up to three phases at Mountain Pass (~1425, ~1405, and ~1380?Ma). The latter two stages were coeval with carbonatite magmatism, revealing previously unrecognized synchronicity in ultrapotassic and carbonatite magmatism at Mountain Pass. Despite this temporal overlap, major and trace element geochemical data are inconsistent with derivation of the carbonatite and ultrapotassic rocks by liquid immiscibility or fractional crystallization from common parental magma. Instead, we propose that the carbonatite was generated as a primary melt from the same source as the ultrapotassic rocks, and that although it is unique, the Mountain Pass ultrapotassic and carbonatite suite is broadly similar to other alkaline silicate-carbonatite occurrences in which the two rock types were generated as separate mantle melts.
DS1991-0641
1991
Hagens, A.Hagens, A., Doveton, J.H.Application of a simple cerebellar model to geologic surface mappingComputers and Geosciences, Vol. 17, No. 4, pp. 561-568GlobalComputers, Surface mapping
DS1999-0144
1999
Hager, B.H.Conrad, C.P., Hager, B.H.The thermal evolution of an earth with strong subduction zonesGeophysical Research Letters, Vol. 26, No. 19, Oct. 1, pp. 3041-44.MantleLithosphere, Subduction
DS1999-0145
1999
Hager, B.H.Conrad, C.P., Hager, B.H.Effects of plate bending and fault strength at subduction zones on platedynamics.Journal of Geophysical Research, Vol. 104, No. 8, Aug. 10, pp. 17, 551-72.MantleTectonics, Subduction
DS1999-0651
1999
Hager, B.H.Shapiro, S.S., Hager, B.H., Jordan, T.H.Stability and dynamics of the continental tectosphereLithos, Vol. 48, No. 1-4, Sept. pp. 115-34.MantleGeodynamics, Craton
DS1999-0652
1999
Hager, B.H.Shapiro, S.S., Hager, B.H., Jordan, T.H.The continental tectosphere and earth's long wave length gravity fieldLithos, Vol. 48, No. 1-4, Sept. pp. 135-52.MantleGeodynamics, Geophysics - gravity
DS200512-0429
2004
Hager, B.H.Hetland, E.A., Hager, B.H.Relationship of geodetic velocities to velocities in the mantle.Geophysical Research Letters, Vol. 31, 17, Sept. 16, L17604.MantleGeophysics
DS1982-0237
1982
Hager, J.M.Hager, J.M.Approximating the Bedrock Topography of Clark County, Ohio, using the Gravity Method.Msc. Thesis, Wright State University, 101P.GlobalMid-continent
DS1994-0691
1994
Hager, J.P.Hager, J.P., Hansen, B.J., et al.Extraction and processing for the treatment and minimization of wastes1994Tms, 1, 1153 pUnited StatesWaste treatment, Book -ad
DS201012-0664
2010
Hager, T.Satikune, S., Zubko, M., Hager, T., Kusz, J., Hofmeister, W.Mineral chemistry and structural relationships of inclusions in diamond crystals. Koffiefontein and FinschInternational Mineralogical Association meeting August Budapest, abstract p. 25.Africa, South AfricaDiamond inclusions
DS1960-0351
1963
Haggard, H.J.E.Haggard, H.J.E.Review of the Yengema Diamond FieldSierra Leone Selection Trust Ltd., UNPUB.Sierra Leone, West AfricaGeology
DS1960-0835
1967
Haggard, H.J.E.Haggard, H.J.E.Notes on Diamond ProspectingC.a.s.t. And Selection Trust Files, South AfricaBlank
DS1991-1310
1991
HaggertyPearson, D.G., Boyd, F.R., Field, S.W., Pasteris, J.D., HaggertyGraphite bearing peridotites from the Kaapvaal craton: their carbon isotopic compositions and implications for peridotite thermobarometryProceedings of Fifth International Kimberlite Conference held Araxa June 1991, Servico Geologico do Brasil (CPRM) Special, pp. 323-325South Africa, LesothoKimberley, Jagersfontein, spectrometry, Carbon composition -table
DS2003-1020
2003
HaggertyNowell, G.M., Pearson, D.G., Jacob, D.E., Spetsius, S., Nixon, P.H., HaggertyThe origin of alkremites and related rocks: a Lu Hf Rb Sr and Sm Nd isotope study8ikc, Www.venuewest.com/8ikc/program.htm, Session 4, POSTER abstractRussia, YakutiaMantle geochemistry, Deposit - Udachnaya
DS1995-0409
1995
Haggerty, S.Deines, P., Haggerty, S.Small scale oxygen isotope variation in ultradeep (>300 KM) and transition zone xenoliths.Proceedings of the Sixth International Kimberlite Conference Extended Abstracts, p. 126-8.South AfricaGeochronology, Deposit -Jagersfontein
DS2003-0529
2003
Haggerty, S.Haggerty, S.Identification of conflict diamonds: a boulevard in creative futilityPdac Abstract 2003, March 10, 1p.GlobalNews item, Conflict diamonds
DS2003-0530
2003
Haggerty, S.Haggerty, S.In the beginning .. diamonds in IndiaPdac Abstract 2003, March 10, 1p.IndiaNews item, History
DS200712-0401
2006
Haggerty, S.Haggerty, S., Fung, A.Oribicular oxides in carbonatitic kimberlites.American Mineralogist, Vol. 91, no. 11-12, pp. 1461-1472.Africa, Namibia, Uganda, South AfricaExamples - Mukorob, Hatzium
DS200812-0224
2008
Haggerty, S.Clement, B.M., Haggerty, S., Harris, J.Magnetic inclusions in diamonds.Earth and Planetary Science Letters, Vol. 267, 1-2, pp.333-340.Africa, BotswanaOrapa - diamond inclusions
DS201112-0401
2010
Haggerty, S.Haggerty, S.Diamond dynamics: modern views through ancient windows.5th Brasilian Symposium on Diamond Geology, Nov. 6-12, abstract p. 12.MantleCore, Carbon, Methane, Subduction
DS201112-0402
2011
Haggerty, S.Haggerty, S.Kimberlites, supercontinents and deep Earth dynamics: Mid-Proterozoic India in Rodinia. ( Not much new)In: Topics in Igneous Petrology, Part 8, pp. 421-435.IndiaOverview
DS201412-0329
2014
Haggerty, S.Haggerty, S.Carbonado: physical and chemical properties, a critical evaluation of proposed origins, and a revised genetic model.Earth Science Reviews, Vol. 130, pp. 1-196.TechnologyCarbonado - review
DS201412-0330
2014
Haggerty, S.Haggerty, S.Diamond exploration in NW Liberia.GSSA Kimberley Diamond Symposium and Trade Show provisional programme, Sept. 10-12, POSTERAfrica, LiberiaExploration overview
DS201412-0331
2014
Haggerty, S.Haggerty, S.Cosmic carbonado: an origin in white dwarf stars, carbon rich exoplanets, and by late heavy bombardment.6 Simposio Brasileiro de Geologia do Diamante, Aug. 3-7, 1p. AbstractSouth America, Brazil, Bahia, Africa, Central African RepublicCarbonado
DS201412-0332
2014
Haggerty, S.Haggerty, S.Diamond exploration in NW Liberia: discovery of a new kimberlite pipe and the recognition of a diagnostic botanical indicator.6 Simposio Brasileiro de Geologia do Diamante, Aug. 3-7, 4p. AbstractAfrica, LiberiaGeobotany
DS201708-1662
2017
Haggerty, S.Haggerty, S.Relation between micro- and macro-diamonds: myth, myopia or both?11th. International Kimberlite Conference, PosterTechnologymicrodiamonds
DS1996-0580
1996
Haggerty, S. E.Haggerty, S. E.Universal diamonds...International Geological Congress 30th Session Beijing, Abstracts, Vol. 2, p. 391.GlobalNannodiamonds
DS1970-0302
1971
Haggerty, S.E.Haggerty, S.E.High Temperature Oxidation of Ilmenite in BasaltsCarnegie Institute Yearbook, FOR 1970, PP. 165-176.GlobalResearch, Origin
DS1970-0705
1973
Haggerty, S.E.Haggerty, S.E.Spinels of Unique Composition Associated with Ilmenite Reactions in the Liqhobong Kimberlite Pipe, Lesotho.Maseru: Lesotho Nat. Dev. Corp. Lesotho Kimberlites Editor N, PP. 149-158.LesothoMineralogy, Mineral Chemistry
DS1975-0094
1975
Haggerty, S.E.Haggerty, S.E.The Chemistry and Genesis of Opaque Minerals in KimberlitesPhysics and Chemistry of the Earth., Vol. 9, PP. 295-307.South AfricaMineral Chemistry, Genesis
DS1975-0343
1976
Haggerty, S.E.Merkel, G.A. , Haggerty, S.E., Boyd, F.R.A Unique Olivine Megacryst from the Monastery MineEos, Vol. 57, No. 4, P. 355. (abstract.).South AfricaPetrography
DS1975-0570
1977
Haggerty, S.E.Mcmahon, B.M., Haggerty, S.E.The Oka Carbonatite Complex: Magnetite Composition and the Role of Immiscible Silicate Liquids.International Kimberlite Conference SECOND., EXTENDED ABSTRACT VOLUME.Canada, QuebecRelated Rocks
DS1975-1048
1979
Haggerty, S.E.Haggerty, S.E.The Jagersfontein Kimberlite, South Africa: an Emporium of Exotic Mineral Reactions from the Upper Mantle.Geological Society of America (GSA), Vol. 11, No. 7, P. 437. (abstract.).South AfricaMineralogy
DS1975-1049
1979
Haggerty, S.E.Haggerty, S.E., Bence, R.J., Mcmahon, B.M.Kimberlites in Western Liberia, Iii. Mineral ChemistryKimberlite Symposium., Vol. 2, CAMBRIDGE UniversityGlobalBlank
DS1975-1050
1979
Haggerty, S.E.Haggerty, S.E., Hardie, R.B.III, Mcmahon, B.M.The Mineral Chemistry of Ilmenite Nodule Associations from The Monastery Diatreme.Proceedings of Second International Kimberlite Conference, Proceedings Vol. 2, PP. 249-256.South AfricaGeochemistry
DS1975-1147
1979
Haggerty, S.E.Mcmahon, B.M., Haggerty, S.E.The Oka Carbonatite Complex: Magnetite Composition and the Related Role of Titanium in Pyrochlore.International Kimberlite Conference SECOND., Vol. 1, PP. 382-392.Canada, QuebecRelated Rocks
DS1975-1189
1979
Haggerty, S.E.Raber, E., Haggerty, S.E.Zircon-oxide Reactions in Diamond Bearing KimberlitesProceedings of Second International Kimberlite Conference, Proceedings Vol. 1, PP. 229-240.South AfricaMineralogy
DS1975-1244
1979
Haggerty, S.E.Tollo, K.P., Haggerty, S.E.Composition and Textural Relations of Discrete Ilmenite And rutile Nodules from the Orapa Ak 1 Kimberlite Pipe, Botswana.Eos, Vol. 60, No. 18, PP. 418-419. (abstract.).BotswanaPetrography
DS1981-0199
1981
Haggerty, S.E.Haggerty, S.E., Toft, P.B., Tompkins, L.A.Diamonds in Graphitic SchistsEos, Vol. 62, No. 17, P. 416. (abstract.).GlobalGeology
DS1981-0408
1981
Haggerty, S.E.Tollo, R.P., Haggerty, S.E., Mcmahon, B.M.Ilmenite Rutile Intergrowths in Kimberlites: Mineral Chemistry, Phase Relations and Possible Implications.Eos, Vol. 62, No. 17, P. 414. (abstract.).South Africa, BotswanaJagersfontein, Orapa
DS1981-0410
1981
Haggerty, S.E.Tompkins, L.A., Haggerty, S.E.The Koidu Kimberlite, Sierra Leone: Preliminary Analytical Results.National Diamond Mining Company Sierra Leone., 28P. UNPUBL. SEPTEMBER.West Africa, Sierra LeoneChemical, Analyses, Mineral Chemistry, Ilmenite, Chlorite, Eclogite
DS1982-0238
1982
Haggerty, S.E.Haggerty, S.E.Kimberlites in Western Liberia: an Overview of the Geological Setting in a Plate Tectonic Framework #2Eos, Vol. 63, No. 45, P. 1175 (abstract.).GlobalBlank
DS1982-0239
1982
Haggerty, S.E.Haggerty, S.E.Kimberlites in Western Liberia: an Overview of the Geological Setting in a Plate Tectonic Framework #1Journal of Geophysical Research, Vol. 87, No. B 13, PP. L0, 8LL-L0, 826.GlobalBlank
DS1982-0240
1982
Haggerty, S.E.Haggerty, S.E.Magsat, Geological and Gravity Correlations in Northern South America and West Africa.Eos, Vol. 63, No. 45, P. 909. (abstract.).South Africa, United StatesMid-continent
DS1982-0241
1982
Haggerty, S.E.Haggerty, S.E.The Mineralogy of Global Magnetic Anomalies #1National Technical Information Service NASA CR 169507, 47P.West AfricaMagsat, Geophysics, Gondwanaland
DS1982-0242
1982
Haggerty, S.E.Haggerty, S.E., Toft, P.B.Magsat: Geological and Gravity Correlations in Northern South America and West Africa.Eos, Vol. 63, No. 45, Nov. 9TH., P. 909, (abstract.).South America, West AfricaGeophysics
DS1982-0243
1982
Haggerty, S.E.Haggerty, S.E., Tompkins, L.A.Opaque Mineralogy and Chemistry of Ilmenite Nodules in West africa Kimberlites: Subsolidus Equilibrium and Controls on Crystallization Trends.Proceedings of Third International Kimberlite Conference, TERRA COGNITA, ABSTRACT VOLUME., Vol. 2, No. 3, PP. 224-225, (abstract.).West Africa, Liberia, Sierra Leone, Mali, GuineaKimberlite, Heavy Minerals, Sampling
DS1982-0603
1982
Haggerty, S.E.Tompkins, L.A., Haggerty, S.E.Unique Kimberlitic Chlorites from Sierra LeoneGeological Society of America (GSA), Vol. 14, No. 7, P. 632, (abstract.).Sierra Leone, West AfricaKimberlite, Petrography
DS1982-0604
1982
Haggerty, S.E.Tompkins, L.A., Haggerty, S.E.The Koidu Kimberlite Complex, Sierra LeoneProceedings of Third International Kimberlite Conference, TERRA COGNITA, ABSTRACT VOLUME., Vol. 2, No. 3, P. 210, (abstract.).Sierra Leone, West AfricaKimberlite, Yengema, Pipe, Dike, Petrology, Mineralogy, Texture
DS1983-0269
1983
Haggerty, S.E.Haggerty, S.E.Radioactive Nuclear Waste Stabilization: Aspects of Solid State Molecular Engineering and Applied Geochemistry.Annual Review of Earth and Planetary Science, Vol. 11, PP. 133-163.GlobalMineral Chemistry, Related Rocks
DS1983-0270
1983
Haggerty, S.E.Haggerty, S.E.A Freudenbergite Related Mineral in Granulites from a Kimberlite in Liberia, West Africa.Neues Jahrbuch fnr Mineralogie, HEFT 8, PP. 375-384.GlobalMineralogy, Microprobe Analyses, Genesis
DS1983-0271
1983
Haggerty, S.E.Haggerty, S.E.The Mineral Chemistry of New Titanates from the Jagersfontein Kimberlite, South Africa: Implications for Metasomatism In the Upper Mantle.Geochimica et Cosmochimica Acta ., Vol. 47, No. 11, NOVEMBER PP. 1833-1854.South AfricaMineral Chemistry
DS1983-0272
1983
Haggerty, S.E.Haggerty, S.E.Oxide Silicate Reactions in Lower Crustal Granulites from Liberia, West Africa.Geological Society of America (GSA), Vol. 15, No. 6, P. 589. (abstract.).West Africa, LiberiaKimberlite, Genesis, Freudenbergite, Garnets, Metasomatism
DS1983-0273
1983
Haggerty, S.E.Haggerty, S.E., Mariano, A.N.Strontian Loparite and Strontio Chevkinite: Two New Minerals in Rheomorphic Fenites from the Parana Basin Carbonatites, south America.Contributions to Mineralogy and Petrology, Vol. 84, No. 4, PP. 365-381.Brazil, ParaguayRelated Rocks, Mineralogy
DS1983-0274
1983
Haggerty, S.E.Haggerty, S.E., Raber, E., Naeser, C.W.Fissure Track Dating of Kimberlitic ZirconsEarth Plan. Sci. Letters, Vol. 63, No. 1, PP. 41-50.South Africa, Botswana, Angola, Tanzania, Wyoming, State LineGeochronology, Kimberley Pool, Orapa, Val Do Queve, Koffiefontein
DS1983-0275
1983
Haggerty, S.E.Haggerty, S.E., Smyth, J.R., Erlank, A.J., Rickard, R.S., Danchi.Lindsleyite (ba) and Mathiasite (k): Two New Chromium Titanaetes in the crichtonite Series from the Upper Mantle.American MINERALOGIST., Vol. 68, PP. 494-505.South AfricaKimberlite, Rare Earth Elements (ree), Mineral Chemistry, Analyses
DS1983-0276
1983
Haggerty, S.E.Haggerty, S.E., Tompkins, L.A.Subsoildus Reactions in Kimberlitic Ilmenites: Exsolutions, reduction and the Redox State of the Mantle- Appendix.Annales Scientifiques De L' Universite De Clermont-ferrand Ii, No. 74, PP. 141-148.West Africa, Liberia, Sierra Leone, Russia, South AfricaAnalyses
DS1983-0277
1983
Haggerty, S.E.Haggerty, S.E., Tompkins, L.A.Redox State of Earth's Upper Mantle from Kimberlite IlmeniteNature., Vol. 303, No. 5915, PP. 295-300.West Africa, Liberia, United StatesMineral Chemistry
DS1983-0602
1983
Haggerty, S.E.Tompkins, L.A., Haggerty, S.E.The Koidu Kimberlite Complex, Sierra Leone: Geological Setting, Petrology and Mineral Chemistry- Appendix.Annales Scientifiques De L' Universite De Clermont-ferrand Ii, No. 74, PP. 99-122.West Africa, Sierra LeoneAnalyses, Mineral Chemistry
DS1983-0603
1983
Haggerty, S.E.Tompkins, L.A., Hargraves, R.B., Haggerty, S.E.Magnetic Mineralogy and Palaeomagnetism of the Koidu Kimberlite Complex Sierra Leone, West Africa.Eos, Vol. 64, No. 18, PP. 216-217. (abstract.).West Africa, Sierra LeoneMineral Chemistry
DS1984-0331
1984
Haggerty, S.E.Haggerty, S.E., Tompkins, L.A.Subsolidus Reactions in Kimberlitic Ilmenites: Exsolution, Reduction and the Redox State of the Mantle.Proceedings of Third International Kimberlite Conference, Vol. 1, PP. 335-357.South Africa, West Africa, Sierra Leone, LiberiaMineral Chemistry, Related Rocks
DS1984-0507
1984
Haggerty, S.E.Mcmahon, B., Haggerty, S.E.The Benfontein Kimberlite Sills: Magmatic Reactions and High Intrusion Temperatures.American Journal of Science, Vol. 284, No. 8, OCTOBER PP. 893-941.South AfricaGenesis, Petrology
DS1984-0733
1984
Haggerty, S.E.Tompkins, L.A., Bailey, S.W., Haggerty, S.E.Kimberlitic Chlorites from Sierra Leone, West Africa: Unusual Chemistries and Structural Polytypes.American Mineralogist., Vol. 69, PP. 237-249.West Africa, Sierra LeoneMineral Chemistry, Nodules
DS1984-0734
1984
Haggerty, S.E.Tompkins, L.A., Haggerty, S.E.The Koidu Kimberlite Complex, Sierra Leone: Geological Setting, Petrology and Mineral Chemistry.In: Kimberlites. I. Kimberlites And Related Rocks, Kornprobs, PP. 83-105.West Africa, Sierra LeoneDiatreme, Kimberlite, Genesis, Carbonatite, Related Rocks, Craton
DS1985-0256
1985
Haggerty, S.E.Haggerty, S.E.The Mineralogy of Global Magnetic Anomalies #2Nasa Cr 174242, 153P.West Africa, Sierra Leone, South Africa, BrazilKimberlite, Geophysics
DS1985-0257
1985
Haggerty, S.E.Haggerty, S.E., Moore, A.E., Erlank, A.J.Macrocryst Fe-ti Oxides in Olivine Melilitites from Namaqualand-bushmanland South Africa.Contributions to Mineralogy and Petrology, Vol. 91, No. 2, PP. 163-170.South AfricaPetrology
DS1985-0675
1985
Haggerty, S.E.Tompkins, L.A., Haggerty, S.E.Groundmass Oxide Minerals in the Koidu Kimberlite Dikes, Sierra Leone, West Africa.Contributions to Mineralogy and Petrology, Vol. 91, No. 3, PP. 245-263.West Africa, Sierra LeonePetrology
DS1986-0218
1986
Haggerty, S.E.Erlandk, A.J., Waters, F.G., Haggerty, S.E., Hawkesworth, C.J.Characterisation of metasomatic processes in peridotite nodules contained in kimberlitesProceedings of the Fourth International Kimberlite Conference, Held Perth, Australia, No. 16, pp. 232-234South AfricaBlank
DS1986-0219
1986
Haggerty, S.E.Erlank, A.J., Waters, F.G., Hawkesworth, C.J., Haggerty, S.E.Evidence for mantle metasomatism in peridotite nodules from the Kimberleypipes, South Africain: Menzies, M.A., Hawkesworth, C.J. editors Mantle Metasomatism, Academic, pp. 221-312South AfricaMetasomatism
DS1986-0243
1986
Haggerty, S.E.Field, S.W., Haggerty, S.E., Erlank, A.J.Subcontinental lithospheric and asthenospheric metasomatism In the region of Jagersfontein, South AfricaProceedings of the Fourth International Kimberlite Conference, Held Perth, Australia, No. 16, pp. 235-237South AfricaBlank
DS1986-0328
1986
Haggerty, S.E.Haggerty, S.E.Diamond genesis in a multiply constrained modelNature, Vol. 320, No. 6057, March 6, pp. 34-38Australia, Western Australia, Kimberley cratonLamproite
DS1986-0329
1986
Haggerty, S.E.Haggerty, S.E.Kimberlite carbonatite relations: brethern or distant cousins?Geological Association of Canada (GAC) Annual Meeting, Vol. 11, p. 76. (abstract.)GlobalGenesis, Carbonatite
DS1986-0330
1986
Haggerty, S.E.Haggerty, S.E.Metasomatic mineral titanate complexing in the upper mantleNature, Vol. 319, No. 6056, Feb. 27th, pp. 761-763South AfricaBultfontein, K-richterite
DS1986-0331
1986
Haggerty, S.E.Haggerty, S.E.Source regions for oxides, sulfides and metals in upper mantle: clues To the stability of diamonds, and the origin Of kimberlites and lamproitesProceedings of the Fourth International Kimberlite Conference, Held Perth, Australia, No. 16, pp. 250-252South Africa, AustraliaLamproite
DS1986-0399
1986
Haggerty, S.E.Jaques, A.L., Boxer, G., Lucas, H., Haggerty, S.E.Mineralogy and petrology of the Argyle lamproite pipe, WesternProceedings of the Fourth International Kimberlite Conference, Held Perth, Australia, No. 16, pp. 48-50AustraliaPetrology, Lamproite
DS1986-0540
1986
Haggerty, S.E.Mazzone, P., Haggerty, S.E.Corganites and corgaspinites. Two new types of aluminous assemblages From the Jagersfontein kimberlite pipeProceedings of the Fourth International Kimberlite Conference, Held Perth, Australia, No. 16, pp. 279-281South AfricaPetrography, Mineral chemistry
DS1986-0565
1986
Haggerty, S.E.Meyer, H.O.A., Haggerty, S.E., Svisero, D.P.Oxide and silicate minerals in the kimberlites of Minas Gerais, BrasilProceedings of the Fourth International Kimberlite Conference, Held Perth, Australia, No. 16, pp. 69-71BrazilMineral chemistry, Analyses
DS1986-0576
1986
Haggerty, S.E.Mitchell, R.H., Haggerty, S.E.A new potassium vanadium barium titanite related to priderite from the New Elands kimberliteNeues Jahrbuch fnr Mineralogie Monatsch, No. 8, pp. 376-384South AfricaLamproite
DS1986-0808
1986
Haggerty, S.E.Toft, P.B., Haggerty, S.E.A remanent and induced magnetization model of magsat vector anomalies over the West African cratonGeophysical Research Letters, Vol. 13, No. 4, April pp. 341-344West AfricaTectonics, Geophysics
DS1987-0188
1987
Haggerty, S.E.Erlank, A.J., Haggerty, S.E., Hawkesworth, C.J., Waters, F.G.Lithospheric metasomatism beneath Southern AfricaTerra Cognita, Conference abstracts Oceanic and Continental Lithosphere:, Vol. 7, No. 4, Autumn, abstract only p. 612Southern AfricaBlank
DS1987-0267
1987
Haggerty, S.E.Haggerty, S.E.Metasomatic mineral titanates in upper mantle xenolithsin: Nixon, P.H. ed. Mantle xenoliths, J. Wiley, pp. 671-690South AfricaAnalyses p.674 LIMA minerals, p. 679 armacolites p. 68
DS1987-0268
1987
Haggerty, S.E.Haggerty, S.E., Erlank, A.J.Lithospheric redox statesTerra Cognita, Conference abstracts Oceanic and Continental Lithosphere:, Vol. 7, No. 4, Autumn, abstract only p. 614GlobalBlank
DS1987-0269
1987
Haggerty, S.E.Haggerty, S.E., Field, S.Rift induced diamond diatremes in the Arabian plate, northwest SyriaEos, Vol. 68, No. 44, November 3, p. 1533. Abstract onlySyriaTectonics
DS1987-0449
1987
Haggerty, S.E.Mazzone, P., McLanahan, A., Haggerty, S.E.Clinopyroxene megacrysts from the Jagersfontein kimberlite pipeEos, abstractSouth AfricaPetrology
DS1987-0742
1987
Haggerty, S.E.Tollo, R.P., Haggerty, S.E.Niobium, chromium rutile in the Orapa kimberlite BotswanaCanadian Mineralogist, Vol. 25, pp. 251-264BotswanaMineralogy, Nodules
DS1988-0702
1988
Haggerty, S.E.Toft, P.B., Haggerty, S.E.Limiting depth of magnetization in cratonic lithosphereGeophysical Research Letters, Vol. 15, No. 5, May pp. 530-533West AfricaBlank
DS1989-0420
1989
Haggerty, S.E.Field, S.W., Haggerty, S.E., Erlank, A.J.Subcontinental metasomatism in the region ofJagersfontein, SouthAfricaGeological Society of Australia Inc. Blackwell Scientific Publishing, Special, No. 14, Vol. 2, pp. 771-783South AfricaMantle Metasomatism
DS1989-0566
1989
Haggerty, S.E.Haggerty, S.E.Mantle metasomes and the kinship between carbonatites and kimberlitesCarbonatites -Genesis and Evolution, Ed. K. Bell Unwin Hyman Publ, pp. 546-560GlobalMantle Metasomatism, Carbonatite-kimberlites
DS1989-0567
1989
Haggerty, S.E.Haggerty, S.E.Upper mantle oxidation state and diamond genesisDiamond Workshop, International Geological Congress, July 15-16th. editors, pp. 26-28GlobalMantle, Diamond genesis
DS1989-0568
1989
Haggerty, S.E.Haggerty, S.E.Upper mantle opaque mineral stratigraphy and the genesis of metasomites and alkali-rich meltsGeological Society of Australia Inc. Blackwell Scientific Publishing, Special, No. 14, Vol. 2, pp. 687-699South Africa, China, AustraliaMantle Metasomatism
DS1989-0641
1989
Haggerty, S.E.Hills, D.V., Haggerty, S.E.Petrochemistry of eclogites from the Koidu kimberliteComplex, SierraLeoneContributions to Mineralogy and Petrology, Vol. 103, No. 4, pp. 397-422Sierra LeonePetrochemistry, Eclogites
DS1989-0704
1989
Haggerty, S.E.Jaques, A.L., Haggerty, S.E., Lucas, H., Boxer, G.L.Mineralogy and petrology of the Argyle (AK1) lamproite pipe, westernAustraliaGeological Society of Australia Inc. Blackwell Scientific Publishing, Special, No. 14, Vol. 1, pp. 153-169AustraliaDeposit -Argyle, Lamproite
DS1989-0964
1989
Haggerty, S.E.Mazzone, P., Haggerty, S.E.Peraluminous xenoliths in kimberlite: metamorphosed restites produced by partial melting of pelitesGeochimica et Cosmochimica Acta, Vol. 53, pp. 1551-1561South AfricaJagersfontein, Xenoliths
DS1989-0965
1989
Haggerty, S.E.Mazzone, P., Haggerty, S.E.Corganites and coraspinites: two new types of aluminous assemblages From the Jagersfontein kimberlite pipeGeological Society of Australia Inc. Blackwell Scientific Publishing, Special, No. 14, Vol. 2, pp. 795-808South AfricaXenoliths, Mineral chemistry
DS1989-1503
1989
Haggerty, S.E.Toft, P.B., Hills, D.V., Haggerty, S.E.Crustal evolution and the granulite to eclogite transition in xenoliths from kimberlites in the West African cratonTectonophysics, Vol. 161, No. 3/4, pp. 213-231GlobalEclogite
DS1990-0629
1990
Haggerty, S.E.Haggerty, S.E.Upper mantle metasomatism: exotic oxides in harzburgite and diamonds ineclogiteInternational Mineralogical Association Meeting Held June, 1990 Beijing China, Vol. 2, extended abstract p. 802-803GlobalMantle metasomatism -harzbugite, Diamond genesis
DS1990-0630
1990
Haggerty, S.E.Haggerty, S.E.Omphacite exsolution in garnet: evidence for ultra deep samples from The upper mantle in the Jagersfontein kimberlite, South AfricaInternational Mineralogical Association Meeting Held June, 1990 Beijing China, Vol. 2, extended abstract p. 803-805South AfricaMineralogy -garnet, Jagersfontein
DS1990-0631
1990
Haggerty, S.E.Haggerty, S.E., Hargraves, R.B., Tompkins, L.A.Oxide mineralogy and magmatic properties of the Koidukimberlite Sierra Leone, West-AfricaGeophysical Journal, I, Vol. 100, No. 2, February pp. 275-Sierra LeoneGarnet analsyses -Mineralogy, Koidu Complex
DS1990-0632
1990
Haggerty, S.E.Haggerty, S.E., Sautter, V.Ultradeep (greater than 300 kilometers) ultramafic upper mantle xenolithsScience, Vol. 248, No. 4958, May 25, pp. 993-996GlobalMantle, Xenoliths
DS1990-0633
1990
Haggerty, S.E.Haggerty, S.E., Sautter, V.Ultra deep ( >300km) garnet clinopyroxene xenoliths in diamondiferouskimberlitesEos, Vol. 71, No. 17, April 24, p. 523 Abstract onlySouth AfricaJagersfontein, Garnet analyses
DS1990-0700
1990
Haggerty, S.E.Hills, D.V., Haggerty, S.E.Eclogites from Koidu kimberlite Complex, Sierra Leone,lithospheric and ultra deep asthenospheric originsEos, Vol. 71, No. 17, April 24, p. 523 Poster Abstract onlySierra LeoneKoidu, Eclogites
DS1990-1421
1990
Haggerty, S.E.Stolz, J.F., Lovley, D.R., Haggerty, S.E.Biogenic magnetite and the magnetization of sedimentsJournal of Geophysical Research, Vol. 95, No. B 4, April 10, pp. 4355-4362GlobalBiogenic magnetite, Sediments
DS1991-0642
1991
Haggerty, S.E.Haggerty, S.E.Oxide mineralogy of the upper mantleReviews in Mineralogy, Vol. 25, Chapter 10, pp. 355-416GlobalOxide mineralogy, Kimberlites, lamproites
DS1991-0643
1991
Haggerty, S.E.Haggerty, S.E.Oxide textures -a mini-atlasReviews in Mineralogy, Vol. 25, Chapter 5, pp. 129-220GlobalOxide mineralogy, Textures
DS1991-0644
1991
Haggerty, S.E.Haggerty, S.E.Emplacement and implications of ultra-deep xenoliths and diamonds from the transition zoneProceedings of Fifth International Kimberlite Conference held Araxa June 1991, Servico Geologico do Brasil (CPRM) Special, pp. 157-159South AfricaPlumes, Mantle, genesis, tectonics
DS1991-1504
1991
Haggerty, S.E.Sautter, V., Haggerty, S.E.Ultra-deep (> 300km),ultramafic xenoliths: direct petrological evidence for the transition zoneProceedings of Fifth International Kimberlite Conference held Araxa June 1991, Servico Geologico do Brasil (CPRM) Special, pp. 347-349South AfricaXenoliths, Jagersfontein, petrology
DS1991-1505
1991
Haggerty, S.E.Sautter, V., Haggerty, S.E., Field, S.Ultradeep (> 300 kilometers) ultramafic xenoliths: petrological evidence from the transition zoneScience, Vol. 252, No. 5007, May 10, pp. 827-830South Africa, BrazilXenoliths, Majorite/spinel, seismic gradient, geophysics
DS1992-0460
1992
Haggerty, S.E.Field, S.W., Haggerty, S.E., Field, J.E., Green, J.M.Symplectities in peridotites and the growth of garnet in the upper mantleEos Transactions, Vol. 73, No. 14, April 7, supplement abstracts p.336South Africa, MantlePeridotite, Harzburgite
DS1992-0500
1992
Haggerty, S.E.Fung, A.T., Haggerty, S.E.high pressure magmatic eclogites, Koidu, Sierra LeoneEos Transactions, Vol. 73, No. 14, April 7, supplement abstracts p.325Sierra LeoneEclogites, Kimberlite pipe 1
DS1992-0644
1992
Haggerty, S.E.Haggerty, S.E.Models for the origin of diamonds, kimberlites and lamproites: relevance To diamond explorationInternational Roundtable Conference on Diamond Exploration and Mining, held, 1p. abstract onlyGlobalKimberlite, lamproite, Diamond genesis, model
DS1992-0645
1992
Haggerty, S.E.Haggerty, S.E.Magnetomineralogy and sources of MAGSAT anomalies at subduction zonesEos Transactions, Vol. 73, No. 14, April 7, supplement abstracts p. 90MantleGeophysics -magnetics, MAGSAT.
DS1992-0646
1992
Haggerty, S.E.Haggerty, S.E.Superplumes, superchrons and superkimberlitesEos Transactions, Vol. 73, No. 14, April 7, supplement abstracts p.325MantleKimberlites, Superplumes
DS1992-0647
1992
Haggerty, S.E.Haggerty, S.E.Diamonds in West Africa: tectonic setting and kimberlite productivityRussian Geology and Geophysics, Vol. 33, No. 10, pp. 35-49West AfricaTectonics, Kimberlites
DS1992-1241
1992
Haggerty, S.E.Pyle, J.M., Haggerty, S.E.Metasomatism of upper mantle eclogites, Jagersfontein kimberlite, SouthAfricaEos Transactions, Vol. 73, No. 14, April 7, supplement abstracts p.324-5South AfricaEclogites, Metasomatism
DS1992-1557
1992
Haggerty, S.E.Toft, P.B., Taylor, P.T., Arkanantha..., J., Haggerty, S.E.Interpretation of satellite magnetic-anomalies over the West Africancraton.Tectonophysics, Vol. 212, No. 1-2, Oct. 1, pp. 21-32.West AfricaGeophysics -magnetics, remote sensing, Craton
DS1993-0472
1993
Haggerty, S.E.Fung, A.T., Haggerty, S.E.Zoning, melting and apatite in mantle eclogites, Koidu, Sierra LeoneEos, Transactions, American Geophysical Union, Vol. 74, No. 16, April 20, supplement abstract p. 320Sierra LeonePetrography, Mineral chemistry
DS1993-0610
1993
Haggerty, S.E.Haggerty, S.E., Fung, A.T., Pyle, J.M.The mantle array and geochemistries of high pressure and high temperatureeclogites.Russian Geology and Geophysics, Vol. 34, No. 12, pp. 51-65.GlobalGeochemistry, Craton, Koidu, Jagersfontein, Eclogites
DS1993-1272
1993
Haggerty, S.E.Pyle, J.M., Haggerty, S.E.Silicate-carbonate liquid immiscibility in upper mantle eclogites, Jagersfontein, kimberlite South Africa.Eos, Transactions, American Geophysical Union, Vol. 74, No. 16, April 20, supplement abstract p. 320.South AfricaPetrography, Mineral chemistry, microprobe
DS1993-1677
1993
Haggerty, S.E.Vlassopoulos, D., Rossman, G.R., Haggerty, S.E.Coupled substitution of Hydrogen and minor elements in rutile and the implications of high OH contents in niobium and chromium rich rutile from the upper mantle.American Mineralogist, Vol. 78, No. 11, 12, November-December pp. 1181-1191.South Africa, Tennessee, GeorgiaMantle geochemistry, Infrared absorption spectra, spectrometry
DS1994-0520
1994
Haggerty, S.E.Field, S.W., Haggerty, S.E.Symplectities in upper mantle peridotites: development and implications For the growth of subsolidus garnet.Contributions to Mineralogy and Petrology, Vol. 118, pp. 138-156.South AfricaPetrology -experimental, Deposit -Jagersfontein
DS1994-0692
1994
Haggerty, S.E.Haggerty, S.E.Superkimberlites: a geodynamic diamond window in the earth's coreEarth and Planet. Science Letters, Vol. 122, No. 1/2, March pp. 57-70.MantleKimberlites, Superkimberlites
DS1994-0693
1994
Haggerty, S.E.Haggerty, S.E.Upper mantle mineralogy #1International Symposium Upper Mantle, Aug. 14-19, 1994, pp. 33-84.MantleMineralogy of kimberlites, lamproites, Review -upper mantle mineralogy
DS1994-0694
1994
Haggerty, S.E.Haggerty, S.E.Deep upper mantle and transition zone xenoliths in the Jagersfonteinkimberlite, Kaapvaal craton.Eos, Vol. 75, No. 16, April 19, p. 192.South AfricaXenoliths, Deposit -Jagersfontein
DS1994-0695
1994
Haggerty, S.E.Haggerty, S.E., Fung, A.T.Orbicular oxide in mantle carbonates: high pressure autoliths or low pressure liquid immiscibility?Eos, Vol. 75, No. 16, April 19, p. 187.MantleCarbonates
DS1994-0696
1994
Haggerty, S.E.Haggerty, S.E., Fung, A.T., Burt, D.M.Apatite, phosphorous and titanium in eclogitic garnet from the uppermantle.Geophysical Research Letters, Vol. 21, No. 16, Aug. 1, pp. 1699-1702.MantleEclogites
DS1994-1347
1994
Haggerty, S.E.Pearson, D.G., Boyd, F.R., Haggerty, S.E., Pasteris, J.D.The characterization and origin of graphite in cratonic lithosphericmantle: a petrological carbon isotope and Raman spectroscopic study.Contr. Mineralogy and Petrology, Vol. 116, No. 3, pp. 449-466.MantleGeochronology, Graphite
DS1994-1418
1994
Haggerty, S.E.Pyle, J.M., Haggerty, S.E.Silicate-carbonate liquid immiscibility in upper mantle eclogites-implications for natrosilicic ,carbonatitesGeochimica et Cosmochimica Acta, Vol. 58, No. 14. July, pp. 2997-3011.GlobalCarbonatite, Eclogite
DS1994-1751
1994
Haggerty, S.E.Taylor, W.R., Tompkins, L.A., Haggerty, S.E.Comparative geochem. of West African kimberlites: evidence micaceous kimberlite endmember sublithosphericGeochimica et Cosmochimica Acta, Vol. 58, 19, pp. 4017-37.GlobalGeochemistry, Deposit -Koidu
DS1994-1752
1994
Haggerty, S.E.Taylor, W.R., Tompkins, L.A., Haggerty, S.E.Comparative geochemistry of West African kimberlites: evidence for amicaceous kimberlite endmember sublith.Geochimica et Cosmochimica Acta, Vol. 58, No. 19, pp. 4017-4037.West Africa, Sierra LeoneGeochemistry, Kimberlites -micaceous
DS1995-0572
1995
Haggerty, S.E.Fung, A.T., Haggerty, S.E.Petrography and mineral compositions of eclogites from the Koidu kimberlitecomplex, Sierra Leone.Journal of Geophysical Research, Vol. 100, No. 10, Oct, 10, pp. 451-474.Sierra LeonePetrography, Deposit -Koidu
DS1995-0714
1995
Haggerty, S.E.Haggerty, S.E.Carbonado, clathrate and cavitation: a model for the acoustic induction ofdiamond.Proceedings of the Sixth International Kimberlite Conference Extended Abstracts, p. 217-19.Brazil, Central African RepublicCarbonado, Seigio
DS1995-0715
1995
Haggerty, S.E.Haggerty, S.E.Ice to diamond: a model for the sonochemical transformation of clathrate tocarbonado.Eos, Abstracts, Vol. 76, No. 17, Apr 25, p. S 153.Central African Republic, BrazilCarbonado, Mineralogy
DS1995-0716
1995
Haggerty, S.E.Haggerty, S.E.Dynamic diamonds: megaplumes and superkimberlitesProspectors and Developers Association of Canada (PDAC) Annual Meeting, p. 57-8. abstractGlobalMegaplumes, Kimberlites
DS1995-0717
1995
Haggerty, S.E.Haggerty, S.E.Upper mantle mineralogy #2Journal of Geodynamics, Vol. 20, No. 4, Dec. pp. 331-364.MantleMineralogy, Review
DS1995-0718
1995
Haggerty, S.E.Haggerty, S.E.Petrochemistry of ultradeep (>300 KM) and transition zone xenolithsProceedings of the Sixth International Kimberlite Conference Extended Abstracts, p. 214-16.South AfricaPetrochemistry, Deposit -Jagersfontein Craton -Kaapvaal
DS1998-0554
1998
Haggerty, S.E.Haggerty, S.E.Diamonds in space and timeIma 17th. Abstract Vol., p. A12. abstractGlobalPresolar, impact, crustal, mantle
DS1998-0555
1998
Haggerty, S.E.Haggerty, S.E., Fung, A.T.Orbicular oxides in carbonatitic kimberlites: high pressure autoliths or low pressure liquid immiscibility?7th International Kimberlite Conference Abstract, pp. 293-5.South AfricaCarbonatite, Deposit - Mukurob, HatziuM.
DS1998-1198
1998
Haggerty, S.E.Pyle, J.M., Haggerty, S.E.Eclogites and the metasomatism of eclogites from the Jagersfonteinkimberlite: punctuated transport...Geochimica et Cosmochimica Acta, Vol. 62, No. 7, Apr. pp. 1207-1232.South AfricaAlkaline magmatism, Deposit - Jagersfontein
DS1999-0431
1999
Haggerty, S.E.Macdougall, J.D., Haggerty, S.E.Ultradeep xenoliths from African kimberlites: Strontium and neodymium isotopic compositions suggest complex history.Earth and Planetary Science Letters, Vol. 170, No. 1-2, June 30, pp. 73-82.South Africa, Africa, Liberia, Sierra LeoneGeochronology
DS2001-0088
2001
Haggerty, S.E.Barth, M.G., Rudnick, R.L., Haggerty, S.E.Geochemistry of xenolithic eclogites from West Africa: pt. 1. a link between MgO eclogites and Archean crust..Geochimica et Cosmochimica Acta, Vol. 65, No. 9, May 1, pp. 1499-West AfricaGeochemistry - eclogites
DS2002-0629
2002
Haggerty, S.E.Haggerty, S.E.The geopolitical setting of conflict diamondsEos, American Geophysical Union, Spring Abstract Volume, Vol.83,19, 1p.Angola, Sierra Leone, Central African Republic, LiberiaDiamonds - conflict
DS2002-1221
2002
Haggerty, S.E.Parthasarathy, G., Chetty, T.R.K., Haggerty, S.E.Thermal stability and spectroscopic studies of zemkorite: a carbonate from the Venkatampalle kimberlite of southern India.American Mineralogist, Vol. 87, pp. 1384-89.India, Andhra PradeshKimberlite - mineralogy, Deposit - Venkatampalle
DS2002-1222
2002
Haggerty, S.E.Parthasarthy, G., Chetty, T.R.K., Haggerty, S.E.Thermal stability and spectroscopic studies of zemkorite: a carbonate from the Venkatampalle kimberlite of southern India.American Mineralogist, Vol.87, pp. 1384-89.Indiamineralogy, Deposit - Venkatamapalle
DS2003-0531
2003
Haggerty, S.E.Haggerty, S.E.India: geological setting and petrochemistry of kimberlite clan rocks in the Dharwar8 Ikc Www.venuewest.com/8ikc/program.htm, Session 7, AbstractIndiaKimberlite petrogenesis
DS2003-0867
2003
Haggerty, S.E.Mainkar, D., Lehmann, B., Haggerty, S.E.Discovery of the very large crater facies kimberlite system of Tokapal, Bastar District8ikc, Www.venuewest.com/8ikc/program.htm, Session 1 POSTER abstractIndiaKimberlite geology and economics, Deposit - Tokapal
DS200412-0761
2003
Haggerty, S.E.Haggerty, S.E.India: geological setting and petrochemistry of kimberlite clan rocks in the Dharwar craton.8 IKC Program, Session 7, AbstractIndiaKimberlite petrogenesis
DS200612-0520
2005
Haggerty, S.E.Haggerty, S.E.Kimberlite clan rocks in India: significance of new volcanological, geochemical and petrological (VGP) observations.Geological Society of India, Bangalore November Meeting Group Discussion on Kimberlites and Related Rocks India, Abstract p. 8-9.IndiaClassification
DS200712-0348
2006
Haggerty, S.E.Garai, J., Haggerty, S.E., Rekhi, S., Chance, M.Infrared absorption investigations confirm the extraterrestrial origin of carbonado diamonds.The Astrophysical Journal, Vol. 653, Dec. 20, pp. L153-L156.TechnologyCarbonado diamonds
DS200812-0440
2008
Haggerty, S.E.Haggerty, S.E.Carbonatitic metasomatism & liquid immiscibility: a Bell ( Keith) ringer's resolve to mantle solutions.Goldschmidt Conference 2008, Abstract p.A341.MantleCarbonatite
DS200912-0243
2009
Haggerty, S.E.Garat, J., Haggerty, S.E., Rekhi, S., Chance, M.Infrared absorption investigations confirm the extraterrestrial origin of carbonado diamonds.The Astrophysical Journal, Vol. 653, L153-156.Africa, Central African Republic, South America, BrazilCarbonado
DS201312-0840
2013
Haggerty, S.E.Smith, C.B., Haggerty, S.E., Chatterjee, B., Beard, A., Townend, R.Kimberlite, lamproite, ultramafic lamprophyre, and carbonatite relationships on the Dharwar Craton, India: an example from the Khaderpet pipe, a Diamondiferous ultramafic with associated carbonatite intrusion.Lithos, Vol. 182-183, pp. 102-113.IndiaDeposit - Khaderpet
DS201312-0841
2013
Haggerty, S.E.Smith, C.B., Haggerty, S.E., Chatterjee, B., Beard, A., Townend, R.Kimberlite, lamproite, ultramafic lamprophyre, carbonatite relationships on the Dharwar Craton, India; and example from the Khaderpet pipe, a Diamondiferous ultramafic with associated carbonatite intrusion.Lithos, Vol. 182-183, pp. 102-113.IndiaDeposit - Khaderpet
DS201412-0333
1999
Haggerty, S.E.Haggerty, S.E.Diamond formation and kimberlite-clan magmatism in cratonic settings.Geochemical Society Special Publication No. 6, Mantle Petrology, No. 6, pp.MantleMagmatism
DS201602-0208
2016
Haggerty, S.E.Haggerty, S.E.Spinel in planetary systems.American Mineralogist, Vol. 101, pp. 5-6.TechnologySpinel terminology

Abstract: Spinel is ubiquitous as a rock-forming mineral in terrestrial, lunar, and planetary basalts and closely associated meteoritic equivalents. A major unknown is whether these rocks formed under similar conditions of partial melting of primary or modified mantle, whether redox environments played a role in evolutionary trends, and did mineral crystal chemistry have any influence on elemental partition between solids and liquids? In a novel approach by Papike et al. (2015), spinel is used as an informative, albeit complex indicator of oxygen fugacity, site occupancy of multiple valence elements, and spinel structural types. Planetary basalts may be reduced (IW-3), oxidized (Earth at FMQ), or of intermediate redox state (Mars). Taking an expansive view, the spinel approach holds enormous promise in understanding the magmatic differentiation of asteroids.
DS201609-1716
2016
Haggerty, S.E.De Wit, M., Bhebhe, Z., Davidson, J., Haggerty, S.E., Hundt, P., Jacob, J., Lynn, M., Marshall, T.R., Skinner, C., Smithson, K., Stiefenhofer, J., Robert, M., Revitt, A., Spaggiari, R., Ward, J.Overview of diamonds resources in Africa.Episodes, Vol. 9, 2, pp. 198-238.AfricaDiamond resources - overview

Abstract: From the discovery of diamonds in South Africa in 1866 until the end of 2013, Africa is estimated to have produced almost 3.2 Bct out of a total global production of 5.03 Bct, or 63.6% of all diamonds that have ever been mined. In 2013 African countries ranked 2nd (Botswana), 3rd (DRC), 6th (Zimbabwe), 7th (Angola), 8th (South Africa), and 9th (Namibia), in terms of carat production and 1st (Botswana), 4th (Namibia), 5th (Angola), 6th (South Africa), 7th (Zimbabwe), and 9th (DRC), in terms of value of the diamonds produced. In 2013 Africa produced 70.6 Mct out of a global total of 130.5 Mct or 54.1%, which was valued at US$ 8.7 billion representing 61.5% of the global value of US$ 14.1 billion.
DS201701-0013
2016
Haggerty, S.E.Haggerty, S.E.Kimberlite discoveries in NW Liberia: tropical exploration & preliminary results.Journal of Geochemical Exploration, Vol. 173, pp. 99-109.Africa, LiberiaKimberlite

Abstract: This report is brief in context and rich in unexpected discovery. With > 2 km of erosion, kimberlite models predict the near-complete removal of pipes with exposures to the pipe-root-zones of dikes. Exploration in NW Liberia has, indeed, uncovered eight kimberlite dikes (~ 10 m wide) but also an en echelon pipe, comparable in size to the Kimberley pipe and De Beers' pipe in South Africa. Discoveries are in a narrow 200-300 m wide valley of extraordinary thick bush, undergrowth, and organic overburden. Ilmenite and co-existing leucoxene were used as diagnostic tracers for detecting hard rock kimberlite in this tropical terrane. Micro-diamonds show that the redox state of ilmenite is a potentially useful proxy as an index for macro-diamond preservation. The tectonic control of kimberlites is complex, with diverse lithologies. Discoveries include a well-defined regional trend for kimberlite dikes along paleo-fracture zones, Precambrian in age (Liberia Trend), coupled with kimberlite dikes on the craton that are traced to Mesozoic oceanic transform faults (the Sierra Leone Trend). Although long predicted, this is the first report of kimberlite dike-trends in Liberia that are similar in orientation to those in Sierra Leone. An explosive blow on a Liberia-Trend dike demonstrates a similarity to the dynamics attendant in rich (50-500 cpht) diamond-bearing dikes in Sierra Leone, and in South Africa of comparable age. The potentially high grade dikes, along with the pipe (~ 500 × 50 m), now more reasonably accounts for the enormous number of alluvial diamonds (blood and non-conflict), recovered over more than seven decades, downstream from the discovery cluster. A neglected region since the classic work by Bardet (1974), and with few contributions on Liberia since then, an update is considered timely, particularly in the context of discoveries of diamond-bearing kimberlite.
DS201709-1995
2017
Haggerty, S.E.Haggerty, S.E.Carbonado Diamond: a review of properties and origin.Gems & Gemology, Vol. 53, 2, summer, pp. 180-188.South America, Brazil, Africa, Central African Republiccarbonado

Abstract: Carbonado diamond is found only in Brazil and the Central African Republic. These unusual diamond aggregates are strongly bonded and porous, with melt-like glassy patinas unlike any conventional diamond from kimberlites-lamproites, crustal collisional settings, or meteorite impact. Nearly two centuries after carbonado's discovery, a primary host rock compatible with the origin of conventional diamond at high temperatures and pressures has yet to be identified. Models for its genesis are far-reaching and range from terrestrial subduction to cosmic sources. Copyright of Gems & Gemology is the property of Gemological Institute of America and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.
DS201711-2515
2017
Haggerty, S.E.Haggerty, S.E.Majorite-indicative ultradeep (>300km) xenoliths with spinel associations from the Jagersfontein kimberlite, South Africa.South African Journal of Geology, Vol. 120, 1, pp. 1-20.Africa, South Africadeposit - Jagersfontein

Abstract: Our earlier studies continued in a diligent search for rare ultradeep xenoliths in the kimberlite diatreme at Jagersfontein. The search has met with moderate success insofar as 20 majorite-bearing (decomposed to *gt + lamellar px) xenoliths are identified. Discrete gts (1 to 2 cm), gt-rich layers (2 to 3 cm) in lherzolites, and rare megacrystic gts (>3 cm) from xenoliths characterize the ultradeep suite. Pyroxene lamellae are crystallographically controlled along {111} gt planes, but px may also be prismatic, lensoidal, coarsely graphic, or annular to gt; jigsaw, rather than 120° dihedral textures, are typical. Gt ranges from Pyr68-74 mole% and CaO - Cr2O3 relations, with two exceptions, are distinctly lherzolitic. Cpx37-46 = Wo mole%, Jd 3-19 mole%, with 0.4 to 2.4 wt% Cr2O3; opx = 92 to 95 mole% en, and ol averages 92.5 mole% with maximum wt% 0.1 CaO, 0.4 NiO, and 0.1 Cr2 O3. A new class of 10 ultradeep xenoliths has lamellar spinel (Cr/Cr + Al = 0.74; Mg/Mg + Fe = 0.58) in addition to cpx with gt >3wt% Cr2O3 (c.f. 0.5 to 1.5 for sp-free types). Five samples are texturally linked but are compositional outliers to the central body of data: two are sp hosts (Cr# 0.69, Mg# 0.76) and (Cr# 0.74, Mg# 0.57) to gt (Pyr72) + cpx (Jd14); one is a gt megacryst (Pyr80) with sp (Cr# 57, Mg# 69); and the remaining two are unusually rich in chromium with gt = 7.3 to 8.2 wt% Cr2O3, rimmed by cpx (2.3 to 3.3 wt% Cr2O3). In addition, there are 17 xenoliths with compositional affinities to the ultradeep suite but lacking the texturally diagnostic lamellar intergrowths of cpx in gt are possibly completely equilibrated to gt + irregular cpx. Results from the new collection substantiate our earlier conclusions that the mantle was sampled by the Jagersfontein kimberlite from the lower lithosphere (250 to 350 km) and the transition zone (435 km) with diagnostic high P-T majorite in lherzolite that decomposed to gt + px at one or more interruptive stations (e.g. lithosphere-asthenosphere boundary), and at one or another time, en route to the surface. Homogeneous majorite occurs as diamond inclusions at Jagersfontein but these are eclogitic, leading to the proposition that the source region in the asthenosphere was an unassimilated mixture of lherzolite and eclogite in the Mid-Cretaceous at the time of kimberlite sampling. Important questions arise: Is majorite primordial; did majorite form exclusively from the transition of pyroxene; or did subsequent dissolution into coexisting garnet take place? Why has majorite not been identified in eclogite, nor diamonds of lherzolitic affinity? Does the formation of majorite and the crystallization of encapsulating diamond imply distinct high P-T events?
DS201804-0698
2017
Haggerty, S.E.Haggerty, S.E.Majorite-indicative ultradeep ( >300 km) xenoliths with spinel associations from the Jagersfontein kimberlite, South Africa.South African Journal of Geology, Vol. 120, 1, pp. 1-20.Africa, South Africadeposit - Jagersfontein

Abstract: Our earlier studies continued in a diligent search for rare ultradeep xenoliths in the kimberlite diatreme at Jagersfontein. The search has met with moderate success insofar as 20 majorite-bearing (decomposed to *gt + lamellar px) xenoliths are identified. Discrete gts (1 to 2 cm), gt-rich layers (2 to 3 cm) in lherzolites, and rare megacrystic gts (>3 cm) from xenoliths characterize the ultradeep suite. Pyroxene lamellae are crystallographically controlled along {111} gt planes, but px may also be prismatic, lensoidal, coarsely graphic, or annular to gt; jigsaw, rather than 120° dihedral textures, are typical. Gt ranges from Pyr68-74 mole% and CaO - Cr2O3 relations, with two exceptions, are distinctly lherzolitic. Cpx = Wo37-46 mole%, Jd3-19 mole%, with 0.4 to 2.4 wt% Cr2O3; opx = 92 to 95 mole% en, and ol averages 92.5 mole% with maximum wt% 0.1 CaO, 0.4 NiO, and 0.1 Cr2O3. A new class of 10 ultradeep xenoliths has lamellar spinel (Cr/Cr + Al = 0.74; Mg/Mg + Fe = 0.58) in addition to cpx with gt >3wt% Cr2O3 (c.f. 0.5 to 1.5 for sp-free types). Five samples are texturally linked but are compositional outliers to the central body of data: two are sp hosts (Cr# 0.69, Mg# 0.76) and (Cr# 0.74, Mg# 0.57) to gt (Pyr72) + cpx (Jd14); one is a gt megacryst (Pyr80) with sp (Cr# 57, Mg# 69); and the remaining two are unusually rich in chromium with gt = 7.3 to 8.2 wt% Cr2O3, rimmed by cpx (2.3 to 3-3 wt% Cr2O3). In addition, there are 17 xenoliths with compositional affinities to the ultradeep suite but lacking the texturally diagnostic lamellar intergrowths of cpx in gt are possibly completely equilibrated to gt + irregular cpx. Results from the new collection substantiate our earlier conclusions that the mantle was sampled by thejagersfontein kimberlite from the lower lithosphere (250 to 350 km) and the transition zone (435 km) with diagnostic high P-T majorite in lherzolite that decomposed to gt + px at one or more interruptive stations (e.g. lithosphere-asthenosphere boundary), and at one or another time, en route to the surface. Homogeneous majorite occurs as diamond inclusions at Jagersfontein but these are eclogitic, leading to the proposition that the source region in the asthenosphere was an unassimilated mixture of lherzolite and eclogite in the Mid-Cretaceous at the time of kimberlite sampling. Important questions arise: Is majorite primordial; did majorite form exclusively from the transition of pyroxene; or did subsequent dissolution into coexisting garnet take place? Why has majorite not been identified in eclogite, nor diamonds of lherzolitic affinity? Does the formation of majorite and the crystallization of encapsulating diamond imply distinct high P-T events?
DS201905-1039
2019
Haggerty, S.E.Haggerty, S.E.Micro-diamonds: proposed origins, crystal growth laws, and the underlying principle governing resource predictions.Geochimica et Cosmochimica Acta, in press available, 43p.Globalmicrodiamonds

Abstract: The origin of micro-diamonds is controversial and although the application to determine the grade and value of macro-diamonds in kimberlite/lamproite bodies continues to receive widespread usage there are several outstanding factors generally not considered, the most important of which is genesis. The issue is addressed in this study in the context that two classes of small diamonds (generally <0.5?mm and rarely <1?mm) are recognized. Micro-diamonds sensu-stricto (MDS) are typically sharp-edged octahedra, free of mineral inclusions and surface etching or corrosion, increase exponentially with decreasing size and are in overwhelming larger concentrations, by orders of magnitude, relative to macro-diamonds (>0.5?mm). The second class of small diamonds (SD <0.5?mm), used in industrial applications, may have modified solution-growth morphologies (e.g. dodecahedra, tetrahexahedra and related forms), and include loosely bonded polycrystalline diamonds (framesite), boart, fibrous cubes and broken fragments. There are large differences in volume to surface-area ratios between MDS and SD, demonstrating unequivocally that pristine and solution-modified forms could not have co-existed in equilibrium under the same P-T-t-fO2 conditions in the mantle. From detailed studies of N and C in diamond, and experimental results on the redox-partitioning of N in the presence of metallic Fe, it is concluded that MDS are plume-related from the D? core-mantle boundary, and are melt-derived in lower mantle proto-kimberlite. The lower mantle is expectedly saturated in metallic Fe, and is highly depleted in N which is siderophile under very low f O2 conditions, a setting in which excessively large (~100 to 3000 ct), but rare Type II mega-diamonds (but also MDS) are inferred to have originated. These diamonds (Type II, Ib, IaA) are distinct from the majority of N-rich Type Ia upper mantle macro-diamonds that grew slowly by metasomatic processes and annealed over long periods. Two crystal growth laws are possibly applicable to the size-distribution of diamonds encountered in kimberlites/lamproites. Gibrat’s Law of proportionate, short-term crystal growth in open systems by advection is applicable to magmatic MDS, whereas macro-diamonds bear some relation to McCabe’s Law of long-term, relatively constant crystal growth, by diffusion metasomatism. The range from small to large diamonds (SFD size-frequency-distribution) is lognormal but is composed of two segments: the smaller size (<0.5?mm) fraction has an overall linear distribution, whereas macro-diamonds (>0.5?mm) are quadratic. The two distributions meet or overlap in a marked discontinuity, implying but not proving distinct origins. The power law governing SFD lognormal distributions is fundamental and is widespread across an enormous number of disciplines (from biology to economics), and may be universal (e.g. it is applicable to planetary scale meteorite impact craters, and to the SFD of cosmic-diamonds from supernovae explosions). Industry applications in resource predictions are from mixtures of diamonds (MDS and SD), and extrapolation to larger stones is valid because the fundamental law is independent of origins.
DS201911-2530
2019
Haggerty, S.E.Haggerty, S.E.Micro-diamonds: proposed origins, crystal growth laws, and the underlying principle governing resource predictions.Geochimica et Cosmochimica Acta, Vol. 266, pp. 184-196.Globalmicrodiamonds

Abstract: The origin of micro-diamonds is controversial and although the application to determine the grade and value of macro-diamonds in kimberlite/lamproite bodies continues to receive widespread usage there are several outstanding factors generally not considered, the most important of which is genesis. The issue is addressed in this study in the context that two classes of small diamonds (generally <0.5?mm and rarely <1?mm) are recognized. Micro-diamonds sensu-stricto (MDS) are typically sharp-edged octahedra, free of mineral inclusions and surface etching or corrosion, increase exponentially with decreasing size and are in overwhelming larger concentrations, by orders of magnitude, relative to macro-diamonds (>0.5?mm). The second class of small diamonds (SD <0.5?mm), used in industrial applications, may have modified solution-growth morphologies (e.g. dodecahedra, tetrahexahedra and related forms), and include loosely bonded polycrystalline diamonds (framesite), boart, fibrous cubes and broken fragments. There are large differences in volume to surface-area ratios between MDS and SD, demonstrating unequivocally that pristine and solution-modified forms could not have co-existed in equilibrium under the same P-T-t-fO2 conditions in the mantle. From detailed studies of N and C in diamond, and experimental results on the redox-partitioning of N in the presence of metallic Fe, it is concluded that MDS are plume-related from the D? core-mantle boundary, and are melt-derived in lower mantle proto-kimberlite. The lower mantle is expectedly saturated in metallic Fe, and is highly depleted in N which is siderophile under very low f O2 conditions, a setting in which excessively large (~100 to 3000 ct), but rare Type II mega-diamonds (but also MDS) are inferred to have originated. These diamonds (Type II, Ib, IaA) are distinct from the majority of N-rich Type Ia upper mantle macro-diamonds that grew slowly by metasomatic processes and annealed over long periods. Two crystal growth laws are possibly applicable to the size-distribution of diamonds encountered in kimberlites/lamproites. Gibrat’s Law of proportionate, short-term crystal growth in open systems by advection is applicable to magmatic MDS, whereas macro-diamonds bear some relation to McCabe’s Law of long-term, relatively constant crystal growth, by diffusion metasomatism. The range from small to large diamonds (SFD size-frequency-distribution) is lognormal but is composed of two segments: the smaller size (<0.5?mm) fraction has an overall linear distribution, whereas macro-diamonds (>0.5?mm) are quadratic. The two distributions meet or overlap in a marked discontinuity, implying but not proving distinct origins. The power law governing SFD lognormal distributions is fundamental and is widespread across an enormous number of disciplines (from biology to economics), and may be universal (e.g. it is applicable to planetary scale meteorite impact craters, and to the SFD of cosmic-diamonds from supernovae explosions). Industry applications in resource predictions are from mixtures of diamonds (MDS and SD), and extrapolation to larger stones is valid because the fundamental law is independent of origins.
DS1992-0648
1992
Haggin, J.Haggin, J.Carbon nitride, Beta-C3N4 developed by researchers at Northwestern University may be harder than diamondChem. Eng. News, Vol. 70, No. 21, May 25, p. 20. # HV 770GlobalSynthetic diamond, Industrial use
DS201312-0351
2013
Haghlighipour, N.Haghlighipour, N.The formation and dynamics of super-Earth planets.Annual Review of Earth and Planetary Sciences, Vol. 41, pp. 469-495.MantleTectonics
DS1991-0645
1991
Haglund, D.Haglund, D., Von Bredow, A.The rise of the new protectionism in North AmericaRaw Materials Alert, Vol. 8, No. 1, pp. 7-14Canada, United States, MexicoEconomics, Politics
DS1950-0066
1951
Hagner, A.F.Hagner, A.F.Anorthosite of the Laramie Range, Albany CountyWyoming Geological Survey Bulletin., No. 43, 15P.United States, Wyoming, State Line, Rocky MountainsBlank
DS1950-0346
1957
Hagner, A.F.Newhouse, W.H., Hagner, A.F.Geologic Map of the Anorthosite Areas Southern Part of the Laramie Range, Wyoming.United States Geological Survey (USGS) MAP, MF-119.United States, Wyoming, State Line, Rocky MountainsBlank
DS1989-0092
1989
Hagni, R.D.Baxter, J.W., Kisvarsanyi, E.B., Hagni, R.D., Bradbury, J.C.Precambrian and Paleozoic geology and ore deposits in the MidcontinentregionAmerican Geophysical Union (AGU) 28th. International Geological Congress Field Trip Guidebook, No. T 147, 68pMissouriGuidebook
DS1994-0697
1994
Hagni, R.D.Hagni, R.D., Kogut, A.I., Schneider, G.I.C.Geology of the Okorusu carbonatite related fluorite deposit north centralNamibia.Geological Society of America Abstracts, Vol. 26, No. 5, April p. 18. Abstract.NamibiaCarbonatite
DS1995-0719
1995
Hagni, R.D.Hagni, R.D., Kogut, A.I., Schneider, G.I.C.The fluorite deposits of the Okorusu alkaline igneous and carbonatitecomplex, north central Namibia.Geological Society Africa 10th. Conference Oct. Nairobi, p. 129-30. Abstract.NamibiaAlkaline rocks, carbonatite, Deposit -Okorusu
DS1995-0988
1995
Hagni, R.D.Kogut, A., Hagni, R.D., et al.Genetic relationship of the fluorite deposits to the carbonatite intrusionat Okorusu N-C Namibia...Geological Society of America (GSA) Abstracts, Vol. 27, No. 6, abstract p. A 379.NamibiaGeochemistry, Carbonatite
DS1997-0463
1997
Hagni, R.D.Hagni, R.D., Kogut, A.Variations in ores, host rocks and ore controls for the carbonatite related fluorspar deposits at Okoruso.Geological Society of America (GSA) Abstracts, Vol. 29, No. 4, Apr. p. 18.NamibiaCarbonatite
DS1997-0464
1997
Hagni, R.D.Hagni, R.D., Kogut, A.I., Schneider, G.I.C.Mineralogical flurospar deposits at Okorusu north central NamibiaGeological Association of Canada (GAC) Abstracts, POSTER.NamibiaCarbonatite, Flurospar
DS1997-1271
1997
Hagni, R.D.Wright, W.R., Mariano, A.N., Hagni, R.D.Geological, petrological, mineralogical ( including rare earth elements (REE) and Nb-Tamineralization) and geochemical examinationGeological Association of Canada (GAC) Abstracts, POSTER.Quebec, Labrador TroughCarbonatite, Deposit - Eldor
DS1999-0280
1999
Hagni, R.D.Hagni, R.D.Mineralogy and beneficiation problems involving fluorspar concentrates from carbonatite related ....Min. Petrol., Vol. 67, No. 1-2, pp. 33-44.GlobalCarbonatite, Mineralogy
DS1999-0808
1999
Hagni, R.D.Wright, W.R., Mariano, A., Hagni, R.D.Pyrochlore mineralization and glimmerite formation in the Elder ( Lake LeMoyne) carbonatite complex.The Canadian Institute of Mining, Metallurgy and Petroleum (CIM) 33rd Forum Industrial Minerals Proceedings, Vol. 50, pp. 205-13.Quebec, Ungava, LabradorCarbonatite - mineralogy
DS2000-0893
2000
Hagni, R.D.Shivdasan, P.A., Hagni, R.D.The origin and emplacement of fluorite ore bodies by replacement of pegmatitic carbonatite, sodic feniteIgc 30th. Brasil, Aug. abstract only 1p.NamibiaCarbonatite, Deposit - Okorusu
DS2001-0433
2001
Hagni, R.D.Hagni, R.D., Shivdasan, P.A.Recognition of pegmatitic carbonatite intrusions in sodic fenite and their importance in fluorite ores...Journal of South African Earth Sciences, Vol. 32, No. 1, p. A 17 (abs)NamibiaCarbonatite, Okoruso
DS2002-0630
2002
Hagni, R.D.Hagni, R.D., Shivdansan, P.A., Mariano, A.N.Cathodluminescence microscopy applications to carbonatite ores: carbonatites and fluorite ores and concentrates at Okorusu, Namibia.18th. International Mineralogical Association Sept. 1-6, Edinburgh, abstract p.151,246.NamibiaCarbonatite
DS2002-0631
2002
Hagni, R.D.Hagni, R.D., Shivdasa, P.A.Paragenetic sequence of pyrrhotite alterations to marcasite, pyrite, magnetite, hematite and goethite in pyroxene and pegmatitic carbonatites and fluorite ores.11th. Quadrennial Iagod Symposium And Geocongress 2002 Held Windhoek, Abstract p. 26.NamibiaCarbonatite, Deposit - Okorusu
DS2002-0632
2002
Hagni, R.D.Hagni, R.D., Shivdasan, P.A.The carbonatite related fluorspar deposits at Okorusu: mineralogy, controls of ore emplacement, genesis...16th. International Conference On Basement Tectonics '02, Abstracts, 2p., 2p.Namibia, India, BrazilComparison to Amba Dongar and Mato Preto
DS2002-1473
2002
Hagni, R.D.Shivdasan, P.A., Hagni, R.D., Mariano, A.N.Character, paragenetic sequence and origin of the carbonatite host rocks for the fluorite deposits at Okorusu, Namibia.11th. Quadrennial Iagod Symposium And Geocongress 2002 Held Windhoek, Abstract p. 40.NamibiaCarbonatite - mineralogy
DS201610-1866
2016
Hagni, R.D.Hagni, R.D.The alkaline igneous carbonatite complex and fluorspar deposits at Okorusu, north centra Namibia.GSA Annual Meeting, 1/2p. abstractAfrica, NamibiaCarbonatite

Abstract: The Okorusu Alkaline Igneous-Carbonatite Complex is located about 50 km north of Otjiwarongo in North-Central Namibia. The complex was intruded during early Cretaceous into late Precambrian Damaran Series metasedimentary rocks. It is nearly circular in plan view with a diameter of about 8 km. Coarse-grained nepheline syenites and foyaites are exposed in low hills near the northern edge of the complex. Early alkalie-rich fluids pervasively fenitized the metasedimentary rocks along the southern margin of the complex forming an east-west ridge of resistant hills that include Okorusu Mountain. The fenites were subsequently brecciated and intruded by several carbonatites, especially medium-grained iron-rich diopside pyroxene carbonitite and very coarse-grained pegmatitic carbonatite. In addition to predominant calcite, the carbonatites contain titaniferous vanadiferous magnetite crystals and diopside crystals as large as one-third meter and hexagonal pyrrhotite crystals as long as one meter. For the past two decades, Okoruru has been the leading carbonatite-related fluorspar producer in the world. Fluorspar has been mined from five separate ore deposits in open pits A, B, C, D, and E. The deposits formed principally by the replacement of carbonatite as shown by local unreplaced remnants of carbonatite in the fluorspar ores, goethite pseudomorphs in fluorspar ores after carbonatite magnetite, diopside, and pyrrhotite crystals, transitions of the ores into carbonatite, and by elevated phosphorus contents resulting from carbonatite apatite crystals that were incompletely replaced by fluorite. Locally, marbles also are replaced by fluorite to form fluorspar ores that are distinguished from carbonatite-replacement fluorspar ores by their finer grain size and lack of phosphorus contents. Fluid inclusions in the fluorite crystals indicate that the fluorspar ores were deposited from 166 to 128oC from fluids of low salinity with less than 5% NaCl equivalent. The genesis of the fluorspar ores is interpreted to have resulted from deeply circulated ground waters that dissolved fluorine from carbonatite at depth. The fluorine in those ore fluids combined with calcium released during the replacement of calcite in carbonatite and marbles at the sites of the fluorspar ore deposition.
DS200512-0386
2005
Hagstrum, J.T.Hagstrum, J.T.Antipodal hotspots and bipolar catastrophes: were oceanic large body impacts the cause?Earth and Planetary Science Letters, Vol. 236, pp. 13-27.MantleHotspots, plumes
DS1860-0279
1877
Hague, A.Hague, A., Emmons, S.F.Volcanic Rocks, Green River Basin Leucite HillsUnited States Geological Survey (USGS), PP. 236-238.United States, Colorado Plateau, WyomingGeology, Petrology
DS201802-0238
2018
Hahn, A.Garzanti, E., Dinis, P., Vermeesch, P., Ando, S., Hahn, A., Huvi, J., Limonta, M., Padoan, M., Resentini, A., Rittner, M., Vezzoli, G.Sedimentary processes controlling ultralong cells of littoral transport: placer formation and termination of the Orange sand highway in southern Angola.Sedimentology, Vol. 65, 2, pp. 431-460.Africa, Angolaplacers, alluvials

Abstract: This study focuses on the causes, modalities and obstacles of sediment transfer in the longest cell of littoral sand drift documented on Earth so far. Sand derived from the Orange River is dragged by swell waves and persistent southerly winds to accumulate in four successive dunefields in coastal Namibia to Angola. All four dunefields are terminated by river valleys, where aeolian sand is flushed back to the ocean; and yet sediment transport continues at sea, tracing an 1800 km long submarine sand highway. Sand drift would extend northward to beyond the Congo if the shelf did not become progressively narrower in southern Angola, where drifting sand is funnelled towards oceanic depths via canyon heads connected to river mouths. Garnet-magnetite placers are widespread along this coastal stretch, indicating systematic loss of the low-density feldspatho-quartzose fraction to the deep ocean. More than half of Moçamedes Desert sand is derived from the Orange River, and the rest in similar proportions from the Cunene River and from the Swakop and other rivers draining the Damara Orogen in Namibia. The Orange fingerprint, characterized by basaltic rock fragments, clinopyroxene grains and bimodal zircon-age spectra with peaks at ca 0•5 Ga and ca 1•0 Ga, is lost abruptly at Namibe, and beach sands further north have abundant feldspar, amphibole-epidote suites and unimodal zircon-age spectra with a peak at ca 2•0 Ga, documenting local provenance from Palaeoproterozoic basement. Along with this oblique-rifted continental margin, beach placers are dominated by Fe-Ti-Cr oxides with more monazite than garnet and thus have a geochemical signature sharply different from beach placers found all the way along the Orange littoral cell. High-resolution mineralogical studies allow us to trace sediment dispersal over distances of thousands of kilometres, providing essential information for the correct reconstruction of ‘source to sink’ relationships in hydrocarbon exploration and to predict the long-term impact of man-made infrastructures on coastal sediment budgets.
DS200712-0989
2006
Hahn, B.C.Silver, P.G., Hahn, B.C., Kreemer, C., Holt, W.E., Haines, J.Convergent margins, growing and shrinking continents, and the Wilson cycle.Geological Society of America Annual Meeting, Vol. 38, 7, Nov. p. 212 abstractUnited StatesBasin and Range, Wilson Cycle
DS1950-0273
1956
Hahn, E.Hahn, E.Diamond, 1956London: Weidenfeld And Nicholson., 262P.GlobalKimberlite, Kimberley, Janlib, Diamond
DS1950-0274
1956
Hahn, E.Hahn, E.Diamond. the Spectacular Story of the Earth's Rarest Treasure and Man's Greatest Greed.New York: Doubleday And Co., 314P.South AfricaHistory, Kimberley
DS2000-0586
2000
Hahn, H.Lorenzi, M.L.B., Hahn, H.Rare earth elements (REE) mineralization at Barra do Itapirapua alkaline carbonatite complex Sp/Pr Brasil.Igc 30th. Brasil, Aug. abstract only 1p.BrazilCarbonatite
DS1960-0677
1966
Hahn, M.Hahn, M.Edelsteinkunde LeichtgemachtIdar-oberstein:, GlobalKimberlite, Kimberley, Janlib, Gemology
DS200512-1102
2004
Hahne, K.Trumbull, R.B., Vietor, T., Hahne, K., Wackerle, R., Ledru, P.Aeromagnetic mapping and reconnaissance geochemistry of the Early Cretaceous Henties Bay Outjo dike swarm, Etendeka Igneous Province, Namibia.Journal of African Earth Sciences, Vol. 40, 1-2, Sept. pp. 17-29.Africa, NamibiaGeophysics - magnetics, basaltic dikes, geochemistry
DS1991-1239
1991
HaiNohda, S., Chen, Hai, Tatsumi, Y.Geochemical stratification in the upper mantle beneath northeast ChinaGeophysical Research Letters, Vol. 18, No. 1, January pp. 97-100ChinaMantle, Geochemistry
DS200412-1432
2004
Hai, X.Ni, Z., Zhai, M., Wang, R., Tong, Y., Shu, G., Hai, X.Discovery of Late Paleozoic retrograded eclogites from the middle part of the northern margin of North Chin a Craton.Chinese Science Bulletin, Vol. 49, 6, pp. 600-606. Ingenta 1042070211ChinaEclogite
DS201512-1923
2015
Haiblen, A.M.Haiblen, A.M., Ward, B.C., Normandeau, P.X., Prowse, N.D.Glacial history and landform genesis in the Lac de Gras area and implications for kimberlite drift prospecting.43rd Annual Yellowknife Geoscience Forum Abstracts, abstract p. 43.Canada, Northwest TerritoriesGeomorphology

Abstract: During the last glaciation, bedrock was eroded, transported and deposited by the Laurentide Ice Sheet across much of Canada. The complex ice and meltwater processes that resulted in sediment deposition are not completely understood. In the central Slave Craton, Northwest Territories, glacial sediments overly many diamond-bearing kimberlites. Diamond deposits in the Lac de Gras area were discovered in the early 1990s by drift prospecting. To better interpret drift prospecting datasets a more thorough understanding of the detailed glacial history of the area is required. We spent six weeks in the Lac de Gras area in summer 2015. Field mapping was complimented by a number of other techniques to elucidate the glacial history of the area. Enigmatic landforms were examined in detail and pits were dug to examine their sedimentology. Samples of matrix material were collected to compare grain size distribution between different sediment types. Pebble counts were done to consider sediment provenance. We also collected ground-penetrating radar profiles to look for stratified sediments within enigmatic mounds. High-resolution orthophotos and a one metre LiDAR digital elevation model of the area, obtained by Dominion Diamond Ekati Corporation, have also been used to investigate landform genesis and the glacial history of the area. In the Lac de Gras area many meltwater corridors can be identified in the high-resolution imagery. These corridors are typically 300-1500 m wide and form dendritic networks. Between the corridors, sandy till of varying thickness overlies bedrock. Within corridors, glaciofluvial landforms and scoured bedrock are common. Also associated with corridors are many mounds of enigmatic origin. These mounds commonly occur in groups and are typically 20-100 m wide and rise 5-15 m above the surrounding area. They are usually composed of an unstratified to poorly-stratified sandy diamicton containing no clay and minor silt. Matrix grain size distribution and pebble lithology results from some mounds are similar to those of nearby regional till. However, patches of well-stratified sediments, exhibiting laminated silts as well as climbing ripples in sand, do exist on parts of some mounds. GPR data suggests that these patches are discontinuous, and that the majority of mounds are composed largely of sandy diamicton. Variation in the sedimentology of the mounds does not appear to be related to variations in mound morphology. It is likely that the majority of the glaciofluvial sediments in the Lac de Gras area were deposited during the final stages of ice retreat across the area when meltwater volumes were high. We suggest that the corridors were formed by subglacial meltwater flow. This is because glaciofluvial deposition almost exclusively occurs within corridors, very little till is found within corridors and the corridors have an undulating elevation profile in the direction of ice flow. Water must have played a role in the deposition of the well-stratified patches of sediment found on some mounds, however, the mounds may not be solely the product of subglacial meltwater flow. A thorough understanding of sediment transport and depositional processes is critical if kimberlite indicator mineral data is to be accurately interpreted.
DS1859-0125
1858
Haidinger, W.Haidinger, W.Der Fur Diamant Oder Noch Werthvolleres Ausgegebene Topas Des Herrn Dupoisat.Wien: Sitzungsberichte Der Mathem.-naturw., Vol. 32, BD. 3.GlobalGeology
DS201212-0278
2012
Haigis, V.Haigis, V., Salanne, M., Jahn, S.Thermal conductivity of minerals in the Earth's lower mantle from molecular dynamics.emc2012 @ uni-frankfurt.de, 1p. AbstractMantleGeothermometry
DS201212-0279
2012
Haigis, V.Haigis, V., Salanne, M., Jahn, S.Thermal conductivity of MgO, MgSiO3 perovskite and post-perovskite in the Earth's deep mantle.Earth and Planetary Science Letters, Vol. 355-356, pp. 102-108.MantleGeothermometry
DS2002-1790
2002
HailingZhlong, H., Chongqiang, Hailing, Cheng, RunshengThe geochemistry of lamprophyres in the Laowangzhai gold deposits, Yunnan: implications for source regionGeochemistry Journal, Vol. 36, pp. 91-112., Vol. 36, pp. 91-112.China, Yunnan ProvinceLamprophyres, minettes, Rare earths, REE, mantle characteristics
DS2002-1791
2002
HailingZhlong, H., Chongqiang, Hailing, Cheng, RunshengThe geochemistry of lamprophyres in the Laowangzhai gold deposits, Yunnan: implications for source regionGeochemistry Journal, Vol. 36, pp. 91-112., Vol. 36, pp. 91-112.China, Yunnan ProvinceLamprophyres, minettes, Rare earths, REE, mantle characteristics
DS2001-0434
2001
Hailstone, M.Hailstone, M.Report of exploration activities - brief notes on the Sault Ste Marie areaOntario Geological Survey Open File, No. 6050, pp.4, 18, 19, 20.OntarioDiamond exploration - brief
DS1993-0611
1993
Hailwood, E.A.Hailwood, E.A., Kidd, R.B.High resolution stratigraphyGeological Society of London Special Publication, No. 70, 350pGlobalTable of contents, Stratigraphy -chronology
DS1998-0556
1998
Haimila, D.Haimila, D.Metallic and industrial mineral assessment report on the airborne geophysics for Hanaa Chain Lakes property.Alberta Geological Survey, MIN 19980023AlbertaExploration - assessment, Buffalo Diamond Ltd.
DS1995-0720
1995
Haimila, N.Haimila, N., Yoshida, T.Assessment report on the Chain Lake Diamod claims in the Hanna areaAlberta Geological Survey, MIN 19950029AlbertaExploration - assessment
DS1996-0581
1996
Haimila, N.Haimila, N.Metallic and industrial mineral 1996 assessment report on the Calling Lakearea.Alberta Geological Survey, MIN 19960018AlbertaExploration - assessment
DS1997-0465
1997
Haimila, N.Haimila, N.Metallic and industrial mineral assessment report on diamond exploration program Heart/Farrel Lake areas.Alberta Geological Survey, MIN 19970001AlbertaExploration - assessment
DS1998-0557
1998
Haimila, N.Haimila, N.Metallic and industrial mineral assessment report on the exploration work in the Bearhead Creek property.Alberta Geological Survey, MIN 19990017AlbertaExploration - assessment, Buffalo Diamonds Ltd.
DS1998-0558
1998
Haimila, R.Haimila, R.Metallic and industrial mineral assessment report on the Calling Lake areaAlberta Geological Survey, MIN 19980005AlbertaExploration - assessment
DS1983-0178
1983
Haimson, B.C.Coates, M.S., Haimson, B.C., Hinze, W.J., Van schmus, W.R.Introduction to the Illinois Deep Hole Project/Journal of Geophysical Research, Vol. 88, No. B9 SEPT. 10, PP. 7267-7750GlobalMid Continent
DS1990-0634
1990
Haimson, B.C.Haimson, B.C.Shallow tests suggest crustal stress rotation west of the midcontinentrift: verification needed through intermediate depth holesGeological Society of America (GSA) Annual Meeting, Abstracts, Vol. 22, No. 7, p. A197GlobalCrustal stress, Geophysics
DS1992-0649
1992
Haimson, B.C.Haimson, B.C., Lee, M.Y.Stress measurements in Quimby granite and the state of stress in The western midcontinentGeological Society of America (GSA) Abstract Volume, Vol. 24, No. 4, April p. 17. abstract onlyIowaMidcontinent Rift, Structure
DS200712-0319
2007
Haines, A.J.Flesch, L.M., Holt, W.E., Haines, A.J., Wen, L., Shen-Tu BingmingThe dynamics of western North America: stress magnitudes and the relative role of gravitational potential energy, plate interaction, boundary and basalGeophysical Journal International, Vol. 169, 3, pp. 866-896.United States, CanadaTectonics
DS200812-0405
2008
Haines, A.J.Ghosh, A., Holt, W.E., Wen, L., Haines, A.J., Flesch, L.M.Joint modeling of lithosphere and mantle dynamics elucidating lithosphere mantle coupling.Geophysical Research Letters, Vol. 35, 16, L16309-10.MantleTectonics
DS1998-0310
1998
Haines, B.J.Davis, C.H., Kluever, C.A., Haines, B.J.Elevation change of the southern Greenland ice sheetScience, Vol. 279, No. 5359, Mar. 27, pp. 2086-88.GreenlandGeomorphology
DS1981-0121
1981
Haines, G.V.Coles, R.L., Haines, G.V., Hannaford, W.Broad Scale Magnetic Anomalies Over Central and Eastern Canada: a Discussion.Canadian Journal of Earth Sciences, Vol. 18, PP. 657-661.Canada, OntarioMid-continent, Geophysics
DS200712-0989
2006
Haines, J.Silver, P.G., Hahn, B.C., Kreemer, C., Holt, W.E., Haines, J.Convergent margins, growing and shrinking continents, and the Wilson cycle.Geological Society of America Annual Meeting, Vol. 38, 7, Nov. p. 212 abstractUnited StatesBasin and Range, Wilson Cycle
DS201012-0395
2010
Haines, S.Koehm, D., Lindenfeld, M., Rumpker, G., Aanyu, K., Haines, S., Passchier, C.W., Sachu, T.Active transgression faults in rift transfer zones: evidence for complex stress fields and implications for crustal fragmentation processes in the western branchInternational Journal of Earth Sciences, Vol. 99, 7, pp. 1633-1642.Africa, East AfricaEast African Rift
DS1989-0569
1989
Haines, S.M.Haines, S.M., Meen, J.K.Igneous and metamorphic continental crust beneath the Valley and Ridge ofVirginia: evidence from xenolithsGeological Society of America (GSA) Abstract Volume, Vol. 21, No. 3, p.19. (Abstract only)GlobalMantle
DS1983-0171
1983
Haines McBride, M.Chenoweth, P.A., Haines McBride, M.Principal Structural Features of OklahomaPennwell Publishing Tulsa, Map 1: 500, 000 in colourMidcontinent, OklahomaTectonics
DS1992-0650
1992
Hainey, J.Hainey, J.Canadian Overseas Exploration Corporation. Namibian diamonds - a growthopportunity. Brokerage overviewCanaccord Research, June 11, 6pNamibiaNews item, Benguela, Canadian Overseas
DS1992-0651
1992
Hainey, J.Hainey, J.Morning comment " diamonds - panic on the street" follow up to yesterday's annoucement that some microdiamonds were from the drill bitCanaccord Research Release, November 20, 1pNorthwest TerritoriesNews item, Aber, SouthernEra
DS1992-0652
1992
Hainey, J.Hainey, J.Dia Met Minerals Limited - diamonds in Canada -close to reality. BrokerageoverviewCanaccord Research, August 13, 8pNorthwest TerritoriesNews item, Dia Met
DS1992-0653
1992
Hainey, J.Hainey, J.Dia Met BHP news -glittering. Brief comment on press release of December 1992Canaccord Research Release, December 9, 1pNorthwest TerritoriesNews item, Dia Met
DS1994-0698
1994
Hainey, J.Hainey, J.Canada's diamond playInternational Review, No. 57, Sept. pp. 2-3.CanadaNews item, Diamond exploration
DS1994-0699
1994
Hainey, J.Hainey, J.Lac de Gras Tli Kwi Cho results negative.. commentaryCanaccord Research, August 5, 5p.Northwest TerritoriesNews item, Kennecott Canada
DS1995-0721
1995
Hainey, J.Hainey, J.Dia Met Minerals Ltd. Diamonds at Lac de Gras - a mega projectCanaccord Capital Corporation, Jan. 30, 12p.Northwest TerritoriesNews item -Promotion, Dia Met Minerals Ltd.
DS1995-0722
1995
Hainey, J.Hainey, J.Diamonds -update discussion on Dia Met, Aber, Mountain Province, SouthernEra.Sanwa McCarthy Securities Limited, 10p.Northwest TerritoriesNews item, Brokerage overview
DS1995-0723
1995
Hainey, J.Hainey, J.Dia Met Minerals Ltd... latest news on diamond values impressiveSanwa McCarthy Securities Ltd., 1p.Northwest TerritoriesNews item, Dia Met Minerals Ltd.
DS1995-0724
1995
Hainey, J.Hainey, J.Dia Met minerals Ltd. Latest news on diamond values impressiveSanwa McCarthy Securities Limited, Sept. 14, 1p.Northwest TerritoriesNews item, Dia Met Minerals Ltd.
DS1996-0582
1996
Hainey, J.Hainey, J.Diamonds in Canada 1996 Steady progress " update and outlook"Equity Research, 31p.CanadaPromotion -markets, Dia Met, Aber, Mountain Province, Lytton, SouthernEra, Ashton, Winspear, Gerle
DS2002-1419
2002
Hainschwang, T.Schmetzer, K., Hainschwang, T., Bernhardt, H.-J., Kiefert, L.New chromium and vanadium bearing garnets from Tranoro, MadagascarGems & Gemology, Vol. 38, Summer, pp. 148-55.MadagascarGarnet - mineralogy ( not specific to diamonds)
DS200512-0387
2005
Hainschwang, T.Hainschwang, T., Katrusha, A., Vollstaedt, H.HPHT treatment of different classes of type I brown diamonds.Journal of Gemmology, Vol. 29, 5-6, pp. 261-273.Diamond - colour
DS200512-0388
2005
Hainschwang, T.Hainschwang, T., Simic, D., Fritsch, E., Deljanin, B., Woodring, S., DelRe, N.A gemological study of a collection of Chameleon diamonds.Gems & Gemology, Vol. 41, 1, Spring pp. 20-34.Diamond morphology - Chamelon - colour change
DS200512-0691
2005
Hainschwang, T.Massi, L., Fritsch, E., Collins, A.T., Hainschwang, T., Notari, F.The amber centres and their relation to the brown colour in diamond.Diamond and Related Materials, Vol. 14, 10, pp. 1623-1629.TechnologyDiamond color
DS200612-0415
2006
Hainschwang, T.Fristch, E., Massi, L., Hainschwang, T., Collins, A.T.The first color center related to the brown graining in type 1a natural diamonds.International Mineralogical Association 19th. General Meeting, held Kobe, Japan July 23-28 2006, Abstract p.TechnologyDiamond H- colour
DS200612-0521
2006
Hainschwang, T.Hainschwang, T., Notari, F., Fritsch, E., Massi, L., Breeding, C.M., Rondeau, B.Natural CO2 rich colored diamonds.GIA Gemological Research Conference abstract volume, Held August 26-27, p. 33. 1/2p.TechnologySpectroscopy
DS200712-0331
2007
Hainschwang, T.Fritsch, E., Massi, L., Rossman, G.R., Hainschwang, T., Joba, S., Dessapt, R.Thermochromic and photochromic behaviour of chameleon diamonds.Diamond and Related Materials, Vol. 16, 2, pp. 401-408 Ingenta 1070685097TechnologyDiamond morphology
DS200712-0332
2007
Hainschwang, T.Fritsch, E., Rondeau, B., Hainschwang, T., Quellier, M.H.A contribution to the understanding of pink color in diamond: the unique historical Grand Cond.Diamond and Related Materials, Vol. 16, 8, pp. 1471-1474.TechnologyDiamond - colour
DS200712-0333
2007
Hainschwang, T.Fritsch, E., Rondeau, B., Hainschwang, T., Quellier, M-H.A contribution to the understanding of pink colour in diamond: the unique, historical 'Grand Conde'.Diamond and Related Materials, Vol. 16, 8, August pp.1471-1474.TechnologyDiamond colour
DS200812-0441
2008
Hainschwang, T.Hainschwang, T., Notari, F., Fritsch, E., et al.HPHT treatment of CO2 containing and CO2 related brown diamonds.Diamond and Related materials, Vol. 17, 3, pp. 340-351.TechnologyType 1 brown diamonds
DS200912-0785
2009
Hainschwang, T.Van der Bogert, C.H., Smith, C.P., Hainschwang, T., McClure, S.F.Gray to blue to violet hydrogen rich diamonds from the Argyle mine, Australia.Gems & Gemology, Vol. 45, 1, Spring pp. 20-37.AustraliaDeposit - Argyle, diamond mineralogy
DS201012-0259
2010
Hainschwang, T.Hainschwang, T.The role of spectroscopy for the distinction of natural colour and colour treated diamonds in the 21st century.International Mineralogical Association meeting August Budapest, abstract p. 24.TechnologySpectroscopy
DS201012-0703
2010
Hainschwang, T.Shiryaev, A.A.,Wiedenbeck, M., Hainschwang, T.Oxygen in bulk monocrystalline diamonds and its correlations with nitrogen.Journal of Physics Condensed Matter, Vol. 22, 4, pp. 45801-45806.TechnologyDiamond crystallography
DS201312-0352
2013
Hainschwang, T.Hainschwang, T., Fritsch, E., Notari, F., Rondeau, B., Katrusha, A.The origin of color in natural C center bearing diamonds.Diamond and Related Materials, Vol. 39, pp. 27-40.TechnologyDiamond colour
DS201312-0353
2013
Hainschwang, T.Hainschwang, T., Karamelas, S., Fristch, E.Luminescence spectroscopy and microscopy applied to study gem materials: a case study of C centre containing diamonds.Mineralogy and Petrology, Vol. 107, 3, pp. 393-413.TechnologySpectroscopy
DS201312-0637
2013
Hainschwang, T.Nasdala, L., Grambole, D., Wildner, M., Gigler, A.M., Hainschwang, T., Zaitsev, A.M., Harris, J.W., Milledge, J., Schulze, D.J., Hofmeister, W., Balmer, W.A.Radio-colouration of diamond: a spectroscopic study.Contributions to Mineralogy and Petrology, Vol. 165, pp. 843-861.Africa, South Africa, Democratic Republic of Congo, South America, Brazil, VenezuelaDiamond - colour
DS201503-0147
2014
Hainschwang, T.Hainschwang, T., Notari, F., Vadaszi, E.The Rhodesian Star: an exceptional asteriated diamond.The Journal of Gemmology, Vol. 34, 4, pp. 306-315.Africa, ZimbabweDiamonds notable
DS201503-0148
2014
Hainschwang, T.Hainschwang,T.Diamants de type 1b: relations entre les proprietes physiques et gemmologiques des diamants contenant de l'Azote Isole.Thesis, University of Nantes, France., In French * reference onlyTechnologyNitrogen
DS201509-0398
2015
Hainschwang, T.Hainschwang, T., Notari, F.The first undisclosed colourless CVD synthetic diamond discovered in a parcel of natural melee sized diamonds.The Journal of Gemmology, Vol. 334, 6, pp. 518-522.TechnologySynthetics

Abstract: During the March 2015 Diamond Show in Basel, Switzerland, a parcel of 6,000 melee-sized colourless diamonds was analysed using the GGTL Diamond Fluorescence Imaging (DFI) Laser+ fluorescence imaging and spectroscopy system. From the entire parcel, one sample stood out clearly with unusual fluorescence colours and distribution, combined with a photoluminescence spectrum that clearly indicated it was a synthetic diamond grown by chemical vapour deposition (CVD).
DS201809-2005
2017
Hainschwang, T.Cassette, P., Notari, F., Lepy, M-C., Caplan, C., Pierre, S., Hainschwang, T., Fritsch, E.Residual radioactivity of treated green diamonds.Applied Radiation and Isotopes, Vol. 126, 1, pp. 66-72.Globaldiamond - green

Abstract: Treated green diamonds can show residual radioactivity, generally due to immersion in radium salts. We report various activity measurements on two radioactive diamonds. The activity was characterized by alpha and gamma ray spectrometry, and the radon emanation was measured by alpha counting of a frozen source. Even when no residual radium contamination can be identified, measurable alpha and high-energy beta emissions could be detected. The potential health impact of radioactive diamonds and their status with regard to the regulatory policy for radioactive products are discussed.
DS201811-2578
2015
Hainschwang, T.Hainschwang, T., Notari, F.Standards and protocols for emerald analysis in gem testing laboratories.InColor, December pp. 106-114.Globalemeralds
DS202012-2218
2020
Hainschwang, T.Hainschwang, T., Notari, F., Pamies, G.The origin of 1330 nm center diamonds. ( hydrogen)Diamond and Related Materials, in press available, 19p. PdfGlobalspectroscopy

Abstract: This study covers hydrogen-rich fancy color diamonds that exhibit complex spectra from the UV all the way to the mid-IR. The diamonds with such spectra that are included here show a large range of colors from brownish yellow to brown, yellow-green to olive and gray to violet. The color origin of such diamonds has always been stated as “hydrogen-related”, without much evidence pointing towards hydrogen actually causing absorptions in the visible spectral range, but only based on their unusually high IR active hydrogen content determined via their FTIR spectra. The diamonds analyzed during this work always showed a series of absorptions in the near-infrared at 7495, 7850, 8255, and 8615 cm-1. For the first time, this here presented study shows the results of low temperature near-infrared spectroscopy performed for a series of differently colored diamonds that all showed these NIR absorptions. When measured at 77 K, it became clear that these NIR bands are actually part of an electronic optical center with ZPLs at 1329.8 to 1330.2 nm (7520-7518 cm-1)/1331.8 to 1332.2 nm (7508-7506 cm-1) and 1341 to 1341.2 nm (7457-7456 cm-1). In this paper we will refer to this defect as the "1330 nm center" (which corresponds to 7519 cm-1) for the sake of brevity. The detailed analysis of the spectra has demonstrated that the colors of diamonds that exhibit the 1330 nm center spectra are caused partially by this same center, and by complex absorption bands associated to two series of ZPLs represented by a number of sharp bands between 965 and 1001 nm, referred to as the 990 nm series in this study. Of these, the 990 nm series was found only in diamonds with significant IR active hydrogen concentrations, while the 1330 nm center was determined to be independent from the concentration of IR active hydrogen. The 1330 nm center was found in spectra lacking the 990 nm series of ZPLs, but the 990 nm series has never been found in spectra without the 1330 nm center. We are suggesting that the defects involved in these absorptions are all nickel-nitrogen-related, with the 1330 nm center lacking hydrogen while it seems reasonable to assume that the 990 nm series includes hydrogen in its structure.
DS201312-0061
2012
Haissen, F.Bea, F., Montero, P., Haissen, F., El Archi, A.2.46 Ga kasilite and nepheline syenites from the Awsard plution, Reguibat Rise of the West African Craton, Morocco. Generation of extremely K-rich magmas at the Archean-Proterozoic transition.Precambrian Research, Vol. 224, pp. 242-254.Africa, MoroccoUltrapotassic rocks
DS201603-0401
2016
Haissen, F.Montero, P., Haissen, F., Mouttaqi, A., Molina, J.F., Errami, A., Sadki, O., Cambeses, A., Bea, F.Contrasting SHRIMP U-Pb zircon ages of two carbonatite complexes from the peri-cratonic terranes of the Reguibat shield: implications for the lateral extension of the West African Craton.Gondwana Research, in press available 13p.Africa, West AfricaCarbonatite

Abstract: The Oulad Dlim Massif of the Western Reguibat Shield contains several carbonatite complexes of previously unknown age. The largest and best studied are Gleibat Lafhouda, composed of magnesiocarbonatites, and Twihinate, composed of calciocarbonatites. Gleibat Lafhouda is hosted by Archean gneisses and schists. It has a SHRIMP U-Th-Pb zircon crystallization age of 1.85 ± 0.03 Ga, a Nd model age of TCR = 1.89 ± 0.03 Ga, and a Sm-Nd age of 1.85 ± 0.39 Ga. It forms part of the West Reguibat Alkaline province. Twihinate, on the other hand, is much younger. It is hosted by Late Silurian to Early Devonian deformed granites and has a zircon crystallization age of 104 ± 4 Ma, which is within error of the age of the carbonatites of the famous Richat Structure in the southwest Reguibat Shield. Like these, the Twihinate carbonatites are part of the Mid-Cretaceous Peri-Atlantic Alkaline Pulse. The Twihinate carbonatites contain abundant inherited zircons with ages that peak at ca. 420 Ma, 620 Ma, 2050 Ma, 2466 Ma, and 2830 Ma. This indicates that their substratum has West African rather than, as previously suggested, Avalonian affinities. It has, however, a Paleoproterozoic component that is not found in the neighboring western Reguibat Shield. The 421 Ma to 410 Ma gneissic granites hosting Twihinate are epidote + biotite + Ca-rich garnet deformed I-type to A-type granites derived from magmas of deep origin compatible, therefore, with being generated in a subduction environment. These granites form a body of unknown dimensions and petrogenesis, the study of which will be of key importance for understanding the geology and crustal architecture of this region.
DS201703-0405
2017
Haissen, F.Haissen, F., Cambeses, A., Montero, P., Bea, F., Dilek, Y., Mouttaqi, A.The Archean kaisilite nepheline syenites of the Awsard intrusive massif ( Reguibat Shield, West African craton, Morocco) and its relationship to alkaline magmatism of Africa.Journal of African Earth Sciences, Vol. 127, pp. 16-50.Africa, MoroccoCraton - magmatism
DS2003-0999
2003
Hajari, S.Nasir, S., Hanna, S., Hajari, S.The petrogenetic association of carbonatite and alkaline magmatism: constraints fromMineralogy and Petrology, Vol. 77, 3/4, pp. 235-258.OmanCarbonatite
DS2003-1000
2003
Hajari, S.Nasir, S., Hanna, S., Hajari, S.The petrogenetic association of carbonatite and alkaline magmatism: constraints fromMineralogy and Petrology, Vol. 77, 3-4, pp. 235-58.OmanCarbonatite
DS200412-1408
2003
Hajari, S.Nasir, S., Hanna, S., Hajari, S.The petrogenetic association of carbonatite and alkaline magmatism: constraints from the Masfut-Rawda Ridge, Northern Oman MountMineralogy and Petrology, Vol. 77, 3/4, pp. 235-258.Africa, Arabia, OmanCarbonatite
DS1997-0466
1997
Hajdasinski, M.M.Hajdasinski, M.M.The evolution of the rate of return approach to mineral projectevaluation17th. World Mining Congress Oct. Mexico, pp. 509-518GlobalEconomics, IRR, Internal rate of return, valuations
DS2000-0377
2000
Hajdasinski, M.M.Hajdasinski, M.M.Internal rate of return IRR as a project ranking toolMining Engineering, Vol. 52, No. 11, Nov. pp. 60-4.GlobalEconomics - IRR not specific to diamonds, Torries concept of IRR not NPV compatible
DS201607-1299
2016
Hajjar, Z.Hajjar, Z., Wafik, A., Constantin, M., Bhilisse, M.Process of serpentinization in the ultramafic massif of Beni Bousera ( internal Rift, Morocco).Arabian Journal of Geosciences, Vol. 9, availableAfrica, MoroccoPeridotite
DS1985-0247
1985
HajnalGreen, A.G., Hajnal, WeberAn evolutionary model of the Western Churchill Province and western Margin of the Superior province in canada.Tectonophysics, Vol. 116, pp. 281-322.Saskatchewan, Manitoba, MontanaGeophysics - Seismics, Magnetics, North American Central Plains Anomaly
DS1997-0073
1997
HajnalBank, C.G., Bostock, M.G., Ells, R.M., VanDecar, HajnalLithospheric mantle structure beneath the Trans Hudson Orogen from teleseismic travel time inversion.Lithoprobe Report, No. 62, pp. 6-9.ManitobaGeophysics - seismics, Tectonics
DS2001-0211
2001
HajnalCorrigan, D., Lucas, Maxeiner, Hajnal, Swanzig, SymeTectonic assembly of the Saskatchewan - Manitoba segment of the Trans Hudson Orogen.Geological Association of Canada (GAC) Annual Meeting Abstracts, Vol. 26, p.29, abstract.Manitoba, SaskatchewanTectonics, Trans Hudson orogeny
DS1998-0559
1998
Hajnal, P.Hajnal, P.Special seismic images of the western margin of the Trans Hudson OrogenGeological Society of America (GSA) Annual Meeting, abstract. only, p.A108.SaskatchewanTectonic, Lithoprobe
DS1998-0560
1998
Hajnal, P.Hajnal, P., nemeth, B.P wave veolocity structure of the Trans Hudson OrogenGeological Society of America (GSA) Annual Meeting, abstract. only, p.A109.SaskatchewanTectonic, Lithoprobe
DS1970-0088
1970
Hajnal, Z.Hajnal, Z.A Continuous Deep Crustal Seismic Refraction and Near Vertical Reflection Profile in the Canadian Shield Interpreted By digital Processing Equipment.Ph.d. Thesis, University Manitoba., GlobalMid-continent, Geophysics
DS1986-0214
1986
Hajnal, Z.Ellis, R.M., Hajnal, Z., Stephenson, R.PRASE 1985crustal seismic reflection profiles in the Peace River Arch area, northwestern Alberta.Geological Survey of Canada (GSC) Open File, No. 2369, p. 51.AlbertaGeophysics - seismics
DS1990-0635
1990
Hajnal, Z.Hajnal, Z., Pandit, B.I., Scott, D., Reilkoff, B.Importance of selecting the most effective processing sequences and relevance of colour displays, analysing the Kapuskasing crustal refelctiondataTerra, Abstracts of Deep Seismic reflection profiling of the Continental, Vol. 2, December abstracts p. 180OntarioTectonics, Kapuskasing Zone
DS1991-1747
1991
Hajnal, Z.Trehu, A., Morelalhuissier, P., Meyer, R., Hajnal, Z., Karl, J.Imaging the Midcontinent Rift beneath Lake Superior using large aperture seismic dataGeophysical Research Letters, Vol. 18, No. 4, April pp. 625-628MidcontinentGeophysics -seismic, Tectonics-rift
DS1992-0654
1992
Hajnal, Z.Hajnal, Z., Lewry, J.Lithoprobe: Trans-Hudson orogen transect. Report of transect meeting held March 9-10, 1992Lithoprobe, Report No. 26, 160p. Geological Society of Canada (GSC) ser QE11LS26Manitoba, Saskatchewan, North DakotaTrans-Hudson Orogen, Geophysics -seismics
DS1993-0245
1993
Hajnal, Z.Chengnan Zhu, Hajnal, Z.Tectonic development of the northern Williston Basin: a seismic interpretation of an east-west regional profileCanadian Journal of Earth Sciences, Vol. 30, No. 3, March pp. 621-630SaskatchewanGeophysics -seismics, Williston Basin
DS1993-0403
1993
Hajnal, Z.Ellis, R.M., Hajnal, Z.Investigation of the properties of the Saskatchewan lithosphere using teleseismic waves.Geological Survey of Canada Open File, No. 2771, 69p. $ 13.00SaskatchewanGeophysics -seismics
DS1994-1033
1994
Hajnal, Z.Lewry, J.F., Hajnal, Z., Green, A., et al.Structure of a Paleoproterozoic continent-continent collision zone: a Lithoprobe seismic reflection profileTectonophysics, Vol. 232, pp. 143-160SaskatchewanGeophysics -seismics, lithoprobe, Orogen -Trans Hudson
DS1995-0493
1995
Hajnal, Z.Ellis, R.M., Hajnal, Z.Investigations of the properties of the lithosphere using teleseismicwaves.Geological Survey of Canada Open File, No. 3119, pp. 207-212.SaskatchewanGeophysics -seismics, Kimberlite
DS1996-0416
1996
Hajnal, Z.Ellis, R.M., Hajnal, Z., Bostock, M.G.Seismic studies on the Trans Hudson Orogen of western CanadaTectonophysics, Vol. 262, pp. 35-50.SaskatchewanGeophysics - seismics, Trans Hudson Orogeny, kimberlites
DS1996-0583
1996
Hajnal, Z.Hajnal, Z., Lucas, S., White, D., Lewry, J., et al.Seismic reflection images of high angle faults and linked detachments In the Trans Hudson Orogen.Tectonics, Vol. 15, No. 2, April pp. 427-439.Manitoba, OntarioCraton, Superior, Lithoprobe
DS1997-0467
1997
Hajnal, Z.Hajnal, Z., Nemeth, B., Forsyth, D.A.Mantle involvement in lithospheric collision: seismic evidence from the Trans-Hudson Orogen, Western Canada.Geophy. Res. Letters, Vol. 24, No. 16, Au. 15, pp. 2079-82.Saskatchewan, AlbertaMantle tectonics, Lithosphere
DS1998-0122
1998
Hajnal, Z.Bezdan, S., Hajnal, Z.Expanding spread profiles across the Trans-Hudson OrogenTectonophysics, Vol. 288, No. 1-4, Mar. pp. 83-92.Manitoba, Alberta, Northwest Territories, OntarioTectonics, Geophysics - seismic
DS1998-0899
1998
Hajnal, Z.Lucas, S., Hajnal, Z., White, D., Bleeker, W., AnsdellCrustal growth and continental collisions in the 1.9-1.8 Ga Trans HudsonOrogen, Manitoba and SaskatchewanGeological Society of America (GSA) Annual Meeting, abstract. only, p.A46.Manitoba, SaskatchewanTectonic, Trans Hudson Orogen
DS1998-1071
1998
Hajnal, Z.Nemeth, B., Hajnal, Z.Structure of the lithospheric mantle beneath the Trans-Hudson Orogen, Canada.Tectonophysics, Vol. 288, No. 1-4, Mar. pp. 93-104.Manitoba, Alberta, Northwest Territories, OntarioTectonics, Geophysics - seismic
DS1998-1072
1998
Hajnal, Z.Nemeth, B., Hajnal, Z.Seismic signature of the lower crust and lithospheric mantle below the Trans Hudson Orogen, Canada.Geological Association of Canada (GAC)/Mineralogical Association of Canada (MAC) Abstract Volume, p. A134. abstract.Saskatchewan, ManitobaGeophysics - seismics, Trans Hudson Orogen
DS1998-1112
1998
Hajnal, Z.Pandit, B., Hajnal, Z.Migration velocities for Trans Hudson Orogen(lithoprobe)transect reflection data.Geological Association of Canada (GAC)/Mineralogical Association of Canada (MAC) Abstract Volume, p. A140. abstract.Saskatchewan, ManitobaGeophysics - seismics, Trans Hudson Orogen
DS1998-1113
1998
Hajnal, Z.Pandit, B.I., Hajnal, Z.Sole thrust of the Trans Hudson OrogenGeological Society of America (GSA) Annual Meeting, abstract. only, p.A110.SaskatchewanTectonics, Trans Hudson Orogen
DS1998-1114
1998
Hajnal, Z.Pandit, B.I., Hajnal, Z., Ashton, K.E.New seismic images of the crust in the central Trans Hudson Orogen ofSaskatchewan.Tectonophysics, Vol. 290, No. 3-4, May 30, pp. 211-20.SaskatchewanGeophysics - seismics, Orogeny
DS1998-1115
1998
Hajnal, Z.Pandit, B.I., Hajnal, Z., Ashton, K.E.New seismic images of the crust in the central Trans - Hudson Orogen ofSaskatchewanTectonophysics, Vol. 290, No. 3-4, May 30, pp. 211-220SaskatchewanGeophysics - seismics, Orogeny
DS1999-0116
1999
Hajnal, Z.Carr, B.J., Hajnal, Z.P and S wave characterization of near surface reflectivity from glacialtills using vertical seismicGeophysics, Vol. 64, No. 3, May-June pp. 970-80.SaskatchewanGeophysics - seismics, Geomorphology - tills
DS2000-0378
2000
Hajnal, Z.Hajnal, Z.The crust beneath the Williston BasinGeological Association of Canada (GAC)/Mineralogical Association of Canada (MAC) 2000 Conference, 4p. abstract.Saskatchewan, North Dakota, South Dakota, MontanaGeophysics - seismics, Craton - Superior, Hearne, Wyoming
DS2000-1011
2000
Hajnal, Z.White, D.J., Zwanzig, H.V., Hajnal, Z.Crustal suture preserved in the Paleoproterozoic Trans Hudson Orogen, CanadGeology, Vol. 28, No. 6, June pp. 527-30.Saskatchewan, Manitoba, Ontario, Western CanadaGeophysics - seismics, gravity, Tectonics - subduction, suture
DS2002-0633
2002
Hajnal, Z.Hajnal, Z., White, D., Clowes, R., Stauffer, M.3- D perspective of the western portion of the Trans Hudson Orogen in SaskatchewanGac/mac Annual Meeting, Saskatoon, Abstract Volume, P.44., p.44.SaskatchewanGeophysics - seismics
DS2002-0634
2002
Hajnal, Z.Hajnal, Z., White, D., Clowes, R., Stauffer, M.3- D perspective of the western portion of the Trans Hudson Orogen in SaskatchewanGac/mac Annual Meeting, Saskatoon, Abstract Volume, P.44., p.44.SaskatchewanGeophysics - seismics
DS2002-1706
2002
Hajnal, Z.White, D.J., Lucas, S.B., Bleeker, W., Hajnal, Z., Lewry, J.F., Zwanzig, H.V.Suture zone geometry along an irregular Paleoproterozoic margin: the Superior boundary zone, Manitoba, Canada.Geology, Vol.30,8,Aug.pp.735-8.ManitobaTectonics
DS200512-0192
2005
Hajnal, Z.Corrigan, D., Hajnal,Z., Nemeth, B., Lucas, S.B.Tectonic framework of a Paleoproterozoic arc continent to continent continent collisional zone, Trans Hudson Orogen, from geological and seismic reflection studies.Canadian Journal of Earth Sciences, Vol. 42, 4, April pp. 421-434.Canada, Saskatchewan, ManitobaGeophysics - Lithoprobe
DS200512-0389
2005
Hajnal, Z.Hajnal, Z., Lewry, J., White, D., Ashton, K., Clowes, R., Stauffer, M., Gyorfi, I., Takacs, E.The Saskatchewan Craton and Hearne Province margin: seismic reflection studies in the western Trans Hudson Orogen.Canadian Journal of Earth Sciences, Vol. 42, 4, April pp. 403-419.Canada, Saskatchewan, ManitobaGeophysics - Lithoprobe
DS200512-0774
2005
Hajnal, Z.Nemeth, B., Clowes, R.M., Hajnal, Z.Lithospheric structure of the Trans Hudson Orogen from seismic refraction - wide angle reflection studies.Canadian Journal of Earth Sciences, Vol. 42, 4, April pp. 435-456.Canada, Saskatchewan, ManitobaGeophysics - Lithoprobe
DS200512-1175
2005
Hajnal, Z.White, D.J., Thomas, M.D., Jones, A.G., Hope, J., Nemeth, B., Hajnal, Z.Geophysical transect across a Paleoproterozoic continent-continent collision zone: the Trans-Hudson Orogen.Canadian Journal of Earth Sciences, Vol. 42, 4, April pp. 385-402.Canada, Northwest TerritoriesGeophysics - seismics
DS200612-0478
2006
Hajnal, Z.Gorman, A.R., Nemeth, B., Clowes, R., Hajnal, Z.An investigation of upper mantle heterogeneity beneath the Archean and Proterozoic crust of western Canada from lithoprobe controlled source seismic experiments.Tectonophysics, Vol. 416, 1-4, April 5, pp. 187-207.Canada, Alberta, Saskatchewan, Northwest TerritoriesGeophysics - seismics
DS201012-0111
2010
Hajnal, Z.Clowes, R.M., White, D.J., Hajnal, Z.Mantle heterogeneities and their significance: results from lithoprobe seismic reflection and refraction wide-angle reflection studies.Canadian Journal of Earth Sciences, Vol. 47, 4, pp. 409-443.MantleGeophysics - seismic
DS200612-0683
2006
Hakesworth, C.J.Kemp, A.I.S., Hakesworth, C.J., Paterson, B.A., Kinny, P.D.Episodic growth of the Gondwana supercontinent from hafnium and oxygen isotopes in zircon.Nature, Vol. 439, Feb. 2, pp. 580583.Mantle, GondwanaGeochronology - zircons
DS201212-0294
2012
Hakin, S.Henning, O.,Sorensen, S.S., Hakin, S., Pedersen, B.oC., Christiansen, Z.I.Non destructive identification of micrometer scale minerals and their position within a bulk sample.Canadian Mineralogist, Vol. 50, 2, pp. 501-509.TechnologyMicrotomography
DS200512-0641
2005
Hakkanen, H.Lindblom, J., Holsa, J., Papunen, H., Hakkanen, H.Luminescence study of defects in synthetic as grown and HPHT diamonds compared to natural diamonds.American Mineralogist, Vol. 90, Feb-Mar. pp. 428-440.Cathodluminescence
DS200512-0642
2005
Hakkanen, H.Lindblom, J., Holsa, J., Papunen, H., Hakkanen, H.Luminescence study of defects in synthetic as-grown and HPHT diamonds compared to natural diamonds.American Mineralogist, Vol. 90, pp. 428-440.Photoluminescence technology, UHP
DS1989-0570
1989
Hakki, W.Hakki, W.Tectonic structures and their importance for the possibility of localization of diamond bearing intrusions in the Mauritanian Craton and the Arabian shieldArabian Mineralogy Journal, Vol.9, No. 1-2, pp. 60-64GlobalTectonics, Intrusions
DS1900-0320
1905
Hakluyt, R.Hakluyt, R.The Principal Navigations of J. Cartier 1491-1557. the Third Voyage Into Counties of Canada, Hochelaga and Saguenay.Glasgow: J. Maclehose And Sons, Vol. 8, PP. 263-272.Canada, QuebecHistory
DS201906-1271
2019
HalBarry, P.H., de Moor, J.M., Giovannelli, D., Schrenk, M., Hummer, D.R., Lopez, T., Pratt, C.A., Alpizar Segua, Y., Battaglia, A., Beaudry, A., Bini, G., Cascante, M., d'Errico, G., di Carlo, M., Fattorini, D., Fullerton, K., H+Gazel, E., Gonzalez, G., HalForearc carbon sink reduces long term volatile recycling into the mantle.Nature , 588, 7753, p. 487.Mantlecarbon

Abstract: Carbon and other volatiles in the form of gases, fluids or mineral phases are transported from Earth’s surface into the mantle at convergent margins, where the oceanic crust subducts beneath the continental crust. The efficiency of this transfer has profound implications for the nature and scale of geochemical heterogeneities in Earth’s deep mantle and shallow crustal reservoirs, as well as Earth’s oxidation state. However, the proportions of volatiles released from the forearc and backarc are not well constrained compared to fluxes from the volcanic arc front. Here we use helium and carbon isotope data from deeply sourced springs along two cross-arc transects to show that about 91 per cent of carbon released from the slab and mantle beneath the Costa Rican forearc is sequestered within the crust by calcite deposition. Around an additional three per cent is incorporated into the biomass through microbial chemolithoautotrophy, whereby microbes assimilate inorganic carbon into biomass. We estimate that between 1.2 × 108 and 1.3 × 1010 moles of carbon dioxide per year are released from the slab beneath the forearc, and thus up to about 19 per cent less carbon is being transferred into Earth’s deep mantle than previously estimated.
DS1993-1138
1993
Halabura, S.Nixon, P.H., Gummer, P.K., Halabura, S., Leahy, K., Finlay, S.Kimberlites of volcanic facies in the Sturgeon Lake areaRussian Geology and Geophysics, Vol. 34, No. 12, pp. 66-76.SaskatchewanVolcanic facies
DS1990-0611
1990
Halabura, S.P.Gummer, P.K., McGowan, S.E., Halabura, S.P.Diamond exploration at Prince Albert, Saskatchewan, CanadaAmerican Institute of Mining, Metallurgical, and Petroleum Engineers (AIME) Meeting, Salt Lake City, February 26, Non speaker/no preprintSaskatchewanExploration, Overview
DS1990-0636
1990
Halabura, S.P.Halabura, S.P.Soft rocks can provide hard rock answersModern Exploration Techniques, editors L.S. Beck, C.T. Harper, Saskatchewan, p.166-167SaskatchewanGeophysics, Craton
DS200712-0204
2007
HalamaCourtier, A.M., Jackson, Lawrence, Wang, Lee, Halama, Warren, Workman, Xu, Hirschmann, Larson, Hart, Lithgo-Bertelloni, Stixrude, ChenCorrelation of seismic and petrologic thermometers suggests deep thermal anomalies beneath hotspots.Earth and Planetary Science Letters, Vol. 264, 1-2, pp. 308-316.MantleGeothermometry
DS200512-0390
2004
Halama, R.Halama, R., Vennnemann, T., Siebel, W., Markl, G.The Gronnedal Ika carbonatite syenite complex, South Greenland: carbonatite formation by liquid immiscibility.Journal of Petrology, Vol. 46, 1-2, pp. 191-217.Europe, GreenlandCarbonatite
DS200712-0402
2007
Halama, R.Halama, R., Joron, J-L., Villemant, B., Markl, G., Treuil, M.Trace element constraints on mantle sources during mid-Proterozoic magmatism: evidence for a link between Gardar and Abitibi mafic rocks.Canadian Journal of Earth Sciences, Vol. 44, 4, pp. 459-478.Canada, Quebec, Europe, GreenlandMagmatism
DS200712-0403
2007
Halama, R.Halama, R., McDonough, W.F., Rudnick, R.L., Keller, J., Klaudius, J.The Li isotopic composition of Oldoinyo Lengai: nature of the mantle sources and lack of isotopic fractionation during carbonatitic petrogenesis.Earth and Planetary Science Letters, Vol. 254, 1-2, Feb. 15, pp. 77-89.Africa, TanzaniaGeochronology, carbonatite
DS200812-0442
2008
Halama, R.Halama, R., McDonough, W.F., Rudnick, R.L., Bell, K.Tracking the lithium isotopic evolution of the mantle using carbonatites.Earth and Planetary Science Letters, Vol. 265, 3-4, Jan. 30, pp. 726-742.MantleCarbonatite
DS201012-0260
2010
Halama, R.Halama, R., Bebout, G.E., John, T., Schenk, V.Nitrogen recycling in subducted oceanic lithosphere: the record in high and ultrahigh pressure metabasaltic rocks.Geochimica et Cosmochimica Acta, Vol. 74, 5, pp. 1636-1652.MantleUHP
DS201112-0403
2011
Halama, R.Halama, R., McDonough, W.F., Rudnick, R.L., Bell, K.The lithium isotopic signature of carbonatites.Goldschmidt Conference 2011, abstract p.965.MantleMagmatism
DS201112-0404
2011
Halama, R.Halama, R., Savov, I.P., Meliksetian, K.The Tezhsar alkaline complex ( Armenia).Peralk-Carb 2011, workshop held Tubingen Germany June 16-18, PosterEurope, ArmeniaAlkalic
DS201112-0405
2011
Halama, R.Halama, R., Timm, J., Herms, P., Hauff, F., Schenk, V.A stable ( Li,O) and radiogenic (Sr, Nd) isotope perspective on metasomatic processes in a subducting slab.Chemical Geology, Vol. 281, 3-4, pp. 151-166.MantleSubduction
DS201212-0280
2012
Halama, R.Halama, R., Bebout, G.E., John, T., Scamberlluri, M.Nitrogen recycling in subducted mantle rocks and implications for the global nitrogen cycle.International Journal of Earth Sciences, in press available 19p.MantleSubduction
DS201710-2239
2017
Halama, R.Li, W-Y., Huang, F., Yu, H-M., Xu, J., Halama, R., Teng, F-Z.Barium isotopic composition of the mantle constrained by carbonatites.Goldschmidt Conference, 1p. AbstractAfrica, Tanzania, east Africa, Canada, Europe, Germany, Greenlandcarbonatite

Abstract: Deep mantle origin and ultra-reducing conditions in podiform chromitite: diamonds, moissanite, and other unusual minerals in podiform chromitites from the Pozanti-Karsanti ophiolite, southern Turkey
DS201908-1786
2019
Halama, R.Li, W-Y., Yu, H-M., Xu, J., Halama, R., Bell, K., Nan, X-Y., Huang, F.Barium isotopic composition of the mantle: constraints from carbonatites.Geochimica et Cosmochimica Acta, in press available doi.org/10.1016 / j.gca.2019.06.041 36p.Africa, Tanzania, Canada, East Africa, Europe, Germany, Greenlanddeposit - Oldoinyo Lengai

Abstract: To investigate the behaviour of Ba isotopes during carbonatite petrogenesis and to explore the possibility of using carbonatites to constrain the Ba isotopic composition of the mantle, we report high-precision Ba isotopic analyses of: (1) carbonatites and associated silicate rocks from the only active carbonatite volcano, Oldoinyo Lengai, Tanzania, and (2) Archean to Cenozoic carbonatites from Canada, East Africa, Germany and Greenland. Carbonatites and associated phonolites and nephelinites from Oldoinyo Lengai have similar d137/134Ba values that range from +0.01 to +0.03‰, indicating that Ba isotope fractionation during carbonatite petrogenesis is negligible. The limited variation in d137/134Ba values from -0.03 to +0.09‰ for most carbonatite samples suggests that their mantle sources have a relatively homogeneous Ba isotopic composition. Based on the carbonatites investigated in this work, the average d137/134Ba value of their mantle sources is estimated to be +0.04?±?0.06‰ (2SD, n?=?16), which is similar to the average value of +0.05?±?0.06‰ for mid-ocean ridge basalts. The lower d137/134Ba value of -0.08‰ in a Canadian sample and higher d137/134Ba values of +0.14‰ and?+?0.23‰ in two Greenland samples suggest local mantle isotopic heterogeneity that may reflect the incorporation of recycled crustal materials in their sources.
DS202006-0931
2020
Halama, R.Li, W-Ye., Yu, H-M., Xu, J., Halama, R., Bell, K., Nan, X-Y., Huang, F.Barium isotopic composition of the mantle: constraints from carbonatites.Geochimica et Cosmochimica Acta, Vol. 278, pp. 235-243. pdfAfrica, Tanzania, Canada, Europe, Germany, Greenlanddeposit - Oldoinyo Lengai

Abstract: To investigate the behaviour of Ba isotopes during carbonatite petrogenesis and to explore the possibility of using carbonatites to constrain the Ba isotopic composition of the mantle, we report high-precision Ba isotopic analyses of: (1) carbonatites and associated silicate rocks from the only active carbonatite volcano, Oldoinyo Lengai, Tanzania, and (2) Archean to Cenozoic carbonatites from Canada, East Africa, Germany and Greenland. Carbonatites and associated phonolites and nephelinites from Oldoinyo Lengai have similar d137/134Ba values that range from +0.01 to +0.03‰, indicating that Ba isotope fractionation during carbonatite petrogenesis is negligible. The limited variation in d137/134Ba values from -0.03 to +0.09‰ for most carbonatite samples suggests that their mantle sources have a relatively homogeneous Ba isotopic composition. Based on the carbonatites investigated in this work, the average d137/134Ba value of their mantle sources is estimated to be +0.04?±?0.06‰ (2SD, n?=?16), which is similar to the average value of +0.05?±?0.06‰ for mid-ocean ridge basalts. The lower d137/134Ba value of -0.08‰ in a Canadian sample and higher d137/134Ba values of +0.14‰ and?+?0.23‰ in two Greenland samples suggest local mantle isotopic heterogeneity that may reflect the incorporation of recycled crustal materials in their sources.
DS202007-1160
2020
Halama, R.Li, W-Y., Yu, H-M., Xu, J., Halama, R., Bell, K., Nan, X-Y., Huang, F.Barium isotopic composition of the mantle: constraints from carbonatites.Geochimica et Cosmochimica Acta, Vol. 278, pp. 235-243.Mantlecarbonatite

Abstract: To investigate the behaviour of Ba isotopes during carbonatite petrogenesis and to explore the possibility of using carbonatites to constrain the Ba isotopic composition of the mantle, we report high-precision Ba isotopic analyses of: (1) carbonatites and associated silicate rocks from the only active carbonatite volcano, Oldoinyo Lengai, Tanzania, and (2) Archean to Cenozoic carbonatites from Canada, East Africa, Germany and Greenland. Carbonatites and associated phonolites and nephelinites from Oldoinyo Lengai have similar d137/134Ba values that range from +0.01 to +0.03‰, indicating that Ba isotope fractionation during carbonatite petrogenesis is negligible. The limited variation in d137/134Ba values from -0.03 to +0.09‰ for most carbonatite samples suggests that their mantle sources have a relatively homogeneous Ba isotopic composition. Based on the carbonatites investigated in this work, the average d137/134Ba value of their mantle sources is estimated to be +0.04?±?0.06‰ (2SD, n?=?16), which is similar to the average value of +0.05?±?0.06‰ for mid-ocean ridge basalts. The lower d137/134Ba value of -0.08‰ in a Canadian sample and higher d137/134Ba values of +0.14‰ and?+?0.23‰ in two Greenland samples suggest local mantle isotopic heterogeneity that may reflect the incorporation of recycled crustal materials in their sources.
DS1991-0018
1991
Halbich, I.W.Altermann, W., Halbich, I.W.Structural history of the southwestern corner of the Kaapvaal Craton And the adjacent Namaqua realm: new observations and a reappraisalPrecambrian Research, Vol. 52, No. 1/2, pp. 133-166Southern AfricaKaapvaal Craton, Tectonics
DS1993-0612
1993
Halbich, I.W.Halbich, I.W.Global geoscience transect 9: Cape Fold belt, Agulhas Bank transect across Gondwana suture, southern AfricaAmerican Geophysical Union (AGU) Map and booklet, 18p. approx. $ 35.00South AfricaLithosphere, Crustal segment
DS1990-0637
1990
Halchuk, S.C.Halchuk, S.C., Mereu, R.F.A seismic investigation of the crust and Moho underlying the Peace RiverArch, CanadaTectonophysics, Vol. 185, No. -12, December 20, pp. 1-20Alberta, SaskatchewanGeophysics -seismics, Peace River Arch
DS1992-0721
1992
Hald, N.Holm, P.M., Gill, R.C.O., Pedersen, A.K., Larsen, J.G., Hald, N.The Icelandic mantle plume: compositional constraints from the West Greenland Tertiary picritesEos Transactions, Vol. 73, No. 14, April 7, supplement abstracts p.336GreenlandPicrites, Mantle plume
DS1993-0694
1993
Hald, N.Holm, P.M., Gill, R.C.O., Pedersen, A.K., Larsen, J.G., Hald, N.The Tertiary picrites of West Greenland: contributions from Icelandic and other sourcesEarth and Planetary Science Letters, Vol. 115, No. 1-4, March pp. 227-244GreenlandPicrites, Alkaline rocks
DS1993-1733
1993
Haldane, J.A.Williams, P.R., Haldane, J.A.An international conference on crustal evolution, metallogeny and exploration of the Eastern GoldfieldsAustralian Geological Survey Extended Abstracts, Record No. 1993/54, 270p. approx. $ 60.00AustraliaNickel, komatiite, Gold, genesis, Supergene, Deposit -Mount Keith, Kambalda Dome, Regolith, laterite, weathering
DS1970-0920
1974
Haldar, D.Haldar, D., Ghose, D.B.Tectonics of the Kimberlites Around Majhgawan, Madhya PradesIndia Geological Survey Spec. Publishing, PP. 47-48.India, Madhya PradeshBlank
DS200712-0882
2007
Halden, N.Reguir, E., Halden, N., Chakmouradian, A., Yang, P., Zaitsev, A.N.Contrasting evolutionary trends in magnetite from carbonatites and alkaline silicate rocks.Plates, Plumes, and Paradigms, 1p. abstract p. A826.Africa, TanzaniaCarbonatite
DS200812-0946
2008
Halden, N.Reguir, E., Chakhmouradian, A., Halden, N., Malkovets, V., Yang, P.Major and trace element compositional variation of phlogopite from kimberlites and carbonatites as a petrogenetic indicator.9IKC.com, 3p. extended abstractCanada, AfricaGeochemistry - ferromagnesian micas
DS1991-0646
1991
Halden, N.M.Halden, N.M.Existence of a marginal basin with the Circum Superior Belt: geochemical evidence from Churchill Superior Boundary in Manitoba.Precambrian Research, Vol. 49, pp. 167-83.ManitobaGeochemistry, Churchill Superior Boundary Zone
DS1997-0559
1997
Halden, N.M.Jobin-Bevans, L.S., Halden, N.M., Peck, D.C., CameronGeology and oxide mineralization of the Pipe stone Lake anorthosite ManitobaExploration and Mining Geology, Vol. 6, No. 1, pp. 35-61ManitobaTitanium, Vanadium, rare earths, Deposit - Pipestone Lake
DS200812-0192
2008
Halden, N.M.Chakhmouradian, A.H., Bohm, C.O., Demeny, A., Reguir, E.P., Hegger, E., Halden, N.M., Yang, P.Kimberlite from Wekusko Lake, Manitoba: a diamond indicator bearing beforsite and not a kimberlite, after all.9IKC.com, 3p. extended abstractCanada, manitobaCarbonatite
DS200812-0194
2008
Halden, N.M.Chakhmouradian, A.R., Demeny, A., Reguir, E.P., Hegner, E., Halden, N.M., Yang, P.'Kimberlite' from Wekusko Lake, Manitoba: re-assessment and implications for further exploration. Beforsite ( primary dolomite carbonatite)... 'notion' could beManitoba Geological Survey, Nov. 21, 1p. abstract.Canada, ManitobaPetrology - potentially diamondiferous
DS200812-0947
2008
Halden, N.M.Reguir, E.P., Chakhmouradian, A.R., Halden, N.M., Yang, P., Zaitsev, A.N.Early magmatic and reaction induced trends in magnetite from the carbonatites of Kerimasi, Tanzania.Canadian Mineralogist, Vol. 46, 4, August pp.Africa, TanzaniaCarbonatite
DS200912-0623
2009
Halden, N.M.Reguir, E.P., Chakmouradian, A.R., Halden, N.M., Malkovets, V.G., Yang, P.Major and trace element compositional variation of phlogopite from kimberlites and carbonatites as a petrogenetic indicator.Lithos, In press available, 50p.TechnologyGeochemistry - ferromagnesian micas
DS201012-0094
2009
Halden, N.M.Chakhmouradian, A.R., Bohm, C.O., Demeny, A., Reguir, E.P., Hegner, E., Creaser, R.A., Halden, N.M., Yang, P.'Kimberlite' from Wekusko Lake Manitoba: actually a diamond indicator bearing dolomite carbonatite.Lithos, Vol. 112 S pp. 347-357.Canada, ManitobaCarbonatite
DS201012-0619
2010
Halden, N.M.Reguir, E.P., Chakhmouradian, A.R., Halden, N.M., Yang, P.Trace element variations in clinopyroxene from calcite carbonatites.International Mineralogical Association meeting August Budapest, abstract p. 575.Canada, Ontario, Russia, Aldan Shield, Kola PeninsulaCarbonatite
DS201012-0620
2010
Halden, N.M.Reguir, E.P., Chakhmouradian, A.R., Halden, N.M., Yang, P.Contrasting trends of trace element zoning in phlogopite from calcite carbonatites.International Mineralogical Association meeting August Budapest, abstract p. 575.United States, Colorado Plateau, Russia, Canada, Ontario, QuebecCarbonatite
DS1975-0754
1978
Halder, D.Halder, D., Ghosh, D.B.Tectonics of the Kimberlites Around Majhgawan Madhya Pradesh, IndiaGeological Survey of India M.P., No. 34, pp. 1-13.IndiaTectonics, Deposit - Majhgawan
DS202009-1652
2020
Halder, M.Paul, D., Chandra, J., Halder, M.Proterozoic alkaline rocks and carbonatites of Peninsula India: a review.Episodes, Vol. 43, 1, pp. 249-277.Indiacarbonatites

Abstract: The alkaline rocks and carbonatites (ARCs) of the Great Indian Proterozoic belt bear the testimony of tectonic processes operating in the Proterozoic during the continental assembly and breakup of both Columbia and Rodinia. We present a comprehensive review, mainly focused on the petrology, geochemistry, and geochronology of 38 ARCs of Peninsular India, which are mostly concentrated within the Eastern Ghats Mobile Belt and Southern Granulite Terrain. Available geochronologic data reveals three distinct alkaline magmatic phases (2533-2340 Ma, 1510-1242 Ma, 833-572 Ma) and two metamorphic events (950-930 Ma and 570-485 Ma) that correlate with the Grenvillian and Pan-African orogeny events. Whereas clinopyroxene, amphibole, titanite and apatite fractionation seems to have affected the nephelinite, nepheline syenite and syenite, carbonatite is affected by fractionation of calcite, dolomite, ankerite, pyroxene, apatite, magnetite, mica, and pyrochlore. Trace elements and Sr-Nd-Pb-C-O isotopic compositions of these ARCs strongly suggest a subcontinental lithospheric mantle source, that is enriched either by distribution of subducted crustal material or by metasomatism of mantle-derived fluids, for the generation of ARCs. Despite some isotopic variability that can result from crustal contamination, a trend showing enrichment in 87Sr/86Sri (0.702 to 0.708) and depletion in eNd(i) (-1.3 to -14.1) over a 2 Gyr duration indicates temporal changes in the lithospheric/asthenospheric source of ARCs, due to periodic enrichment of the source by mantle-derived fluids. ARC generation starts in an intracontinental rift setting (beginning of Wilson cycle). These early-formed ARCs are carriedto 100 km depths during continental collision (termination stage of Wilson cycle) and undergo extensive melting because of renewed rifting along suture zones to form new generation of ARCs.
DS1991-0647
1991
Halderman, T.P.Halderman, T.P., Davis, P.M.Qp beneath the Rio Grande and East African Rift ZonesJournal of Geophysical Research, Vol. 96, No. B6, June 10, pp. 10, 113-10, 128Colorado Plateau, East Africa, TanzaniaGeophysics, Tectonics
DS200912-0560
2008
Hale, A.OzBench, M., Regenauerlieb, K., Stegman, D.R., Morra, G., Farrington, R., Hale, A., May, D.A., Freeman, J.A model comparison study of large scale mantle lithosphere dynamics driven by subduction.Physics of the Earth and Planetary Interiors, Vol. 171, 1-4, pp. 224-234.MantleTectonics
DS1995-0725
1995
Hale, J.R.Hale, J.R., Friberg, L.M.Petrogenesis of New England-Quebec lamprophyres from Hills borough Merrimack and Rockingham Counties.Geological Society of America (GSA) Abstracts, Vol. 27, No. 1, Feb. p. 51.GlobalLamprophyres
DS1992-1548
1992
Hale, M.Thompson, M., Hale, M., Coles, B.Geochemical reconnaissance using stream-sediment pebble coatings and laser ablation ICP-AESTransactions Institute of Mining and Metallurgy (IMM), Vol. 100, pp. B9-B14GlobalGeochemistry, ICP-AES
DS1994-0700
1994
Hale, M.Hale, M., Plant, J.A.Drainage geochemistryElsevier, Handbook of exploration geochemistry, Vol. 6, 780pGlobalGeochemistry -drainage, Book -table of contents
DS200612-1104
2006
hale, M.Porwal, A., Carranza, E.J.M., hale, M.Bayesian network classifiers for mineral potential mapping.Computers & Geoscience, Vol. 32, 1, Feb. pp. 1-16.India, Aravalli ProvinceGIS - not specific to diamonds
DS2000-0379
2000
Hale, M. editor.Hale, M. editor.Geochemical remote sensing of the Sub-surface.Mentions diamonds on p. 119, 303, 305, 347.Elsevier Handbook Exploration Geochemistry, Vol. 7GlobalRemote sensing, groundwater, electrochemical, helium
DS1993-0613
1993
Hale-Erlich, W.S.Hale-Erlich, W.S., Coleman, J.L. Jr.Ouachita-Appalachian juncture:a Paleozoic transpressional zone in the southeastern United States (US)American Association of Petroleum Geologists Bulletin, Vol. 77, No. 4, April, pp. 552-568ArkansasStructure, Gondwana, North American Craton
DS200512-1156
2005
Halenius, U.Vuorinen, J.H., Halenius, U.Nb Zr and LREE rich titanite from the Alno alkaline complex: crystal chemistry and its importance as a petrogenetic indicator.Lithos, Vol. 83, 1-2, July pp.128-142.Europe, SwedenMelteigite, ijolite
DS200512-1157
2005
Halenius, U.Vuorinen, J.H., Halenius, U., Whitehouse, M.J., Mansfeld, J., Skelton, A.D.L.Compositional variations (major and trace elements) of clinopyroxene and Ti and radite from pyroxenite, ijolite and nepheline syenite, Alno Island, Sweden.Lithos, Vol. 81, 1-4, April pp. 55-77.Europe, Sweden, Alno IslandGeochemistry, melteigite
DS1991-0648
1991
Hales, A.L.Hales, A.L.Upper mantle models and the thickness of the continental lithosphereGeophys. Journal of International, Vol. 105, No. 2, May pp. 355-364GlobalMantle, Lithosphere
DS1900-0753
1909
Hales, F.C.Hales, F.C.Diamonds at Echunga. History of the QuestRegister., JUNE 17TH.Australia, South AustraliaDiamond
DS1900-0754
1909
Hales, F.C.Hales, F.C.Diamonds at Echunga. a Visit to the FieldRegister., Oct. 5TH.Australia, South AustraliaDiamond
DS1989-0571
1989
Hales, M.J.Hales, M.J.Reading mine financial statementsMine Financing seminar, held April 17th. Toronto, Database # 17804GlobalEconomics, Financial statements
DS201412-0220
2014
Halevy, I.Eiler, J.M., Berquist, B., Bourg, I., Cartigny, P., Farquhar, J., Gagnon, A., Guo, W., Halevy, I., Hofman, A., larson, T.E., Levin, N., Schauble, E.A., Stolper, D.Frontiers of stable isotope geoscience.Chemical Geology, Vol. 372, pp. 119-143.TechnologyReview of isotopes
DS1986-0585
1986
Haley, B.R.Morris, E.M., Stone, C.G., Howard, M.J., Haley, B.R.Geology and petrology of the Prairies Creek intrusive,Mufreesboro, ArkansawIn: Sedimentary and Igneous rocks of Ouachita Mountains of Arkansaw; A, Vol. 86-2, pp. 99-106ArkansasBlank
DS1986-0785
1986
Haley, B.R.Stone, C.G., Howard, M.J., Haley, B.R.Stop description First Day: Southwestern Arkansaw, MurfreesboroIn: Sedimentary and Igneous rocks of Ouachita Mountains of Arkansaw; A, Vol. 86-2, pp. 1-5ArkansasBlank
DS1993-0614
1993
Haley, B.R.Haley, B.R.Geologic map of ArkansawU.s.geological Survey, Map 1: 500, 000 1 sheet colour $ 7.30ArkansasMap -geology
DS201812-2815
2018
Haley, W.Haley, W.Diavik diamond mine update.2018 Yellowknife Geoscience Forum , p. 27-28.Canada, Northwest Territoriesdeposit - Diavik

Abstract: Over the past year, the Diavik Diamond Mine continued to make significant contributions through its mining operation on Lac de Gras, NWT. The mine is the second largest diamond mine in the NWT (and in Canada), but the largest producer of Canadian rough diamonds. Production has been augmented in 2018 with the official opening and start of mining from a new ore body called A-21.
DS200512-0320
2004
Halicz, L.Gazit, O., Navon, O., Halicz, L., Stein, M.The petrogenesis and thermal history of lower crustal xenoliths from Karnei-hitin, northern Israel.Israel Geological Society, p. 34. 1p. Ingenta 1045591078.Europe, IsraelGeothermometry
DS1998-0561
1998
Halim, N.Halim, N., Kravchinsky, V., et al.A paleomagnetic study from the Mongol - Okhotsk region: rotated early Cretaceous volcanics and remagnetized..Earth and Plan. Sci. Lett, Vol. 159, pp. 133-45GlobalOkhotsk region, suture zones, tectonics, Fold belts
DS2001-1286
2001
Halim, N.Yokoyama, M., Liu, Y., Halim, N., Otofuji, Y.Paleomagnetic study of Upper Jurassic rocks from Sichuan Basin: tectonic aspects for collision....Earth and Planetary Science Letters, Vol. 193, No. 3-4, pp.273-85.ChinaTectonics, Block - Yangtze and North China
DS1999-0396
1999
HalkoahoLatypov, R.M., Mitrofanov, Alapietti, HalkoahoPetrology of the lower layered horizon of the Western Pansky TundraIntrusion, Kola Peninsula.Petrology, Vol. 7, No. 5, pp. 482-508.Russia, Kola PeninsulaLayered intrusion - not specific to diamonds
DS1994-1163
1994
HallMeet, J.G., Hargraves, R.B., Van der Voo, R., HallPaleomagnetic and 40Ar/39Ar studies of Late Kebaran intrusives in Burundi:Proterozoic supercontinentsJournal of Geology, Vol. 102, No. 6, Nov. pp. 621-638GlobalGeochronology, Proterozoic, Rodinia
DS1998-1174
1998
HallPokhilenko, N.P., McDonald, J.A., Melnyk, Hall, ShimizuKimberlites of Camsell Lake field and some features of construction and composition of lithosphere roots...7th. Kimberlite Conference abstract, pp. 699-701.Northwest TerritoriesCraton - Slave, Deposit - Camsell Lake
DS2000-0937
2000
HallStreepey, M.M., Van der Pluijn, B.A., Essene, E.J., HallLate Proterozoic (ca 930 Ma) extension in eastern LaurentiaGeological Society of America (GSA) Bulletin., Vol. 112, No. 10, Oct. pp. 1522-30.GlobalGrenville Province, calcium, Geochronology
DS2001-0347
2001
HallFunck, T., Louden, Hall, Wardle, Salisbury, ReidSynthesis of the Escoot 1996 refraction seismic studies in the Torngat Orogen.Geological Association of Canada (GAC) Annual Meeting Abstracts, Vol. 26, p.48, abstract.Quebec, Labrador, UngavaGeophysics - seismics, ESCOOT.
DS2001-0934
2001
HallPokhilenko, 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
HallPokhilenko, 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
DS2001-1183
2001
HallVan der Pluijm, B.A., Hall, Vrolljk, Pevear, CoveyThe dating of shallow faults in the Earth's crustNature, Vol. 412, July 12, pp. 172-5.British Columbia, CordilleraStructure
DS2001-1216
2001
HallWalsh, K.L., Siegfried, P., Hall, HughesTectonic implications of four recently discovered carbonatites along the Zambesi Escarpment Fault.Journal of South African Earth Sciences, Vol. 32, No. 1, p. A 36-7.(abs)ZimbabweCarbonatite, Marindagomo Complex, Dande-Doma
DS200612-0527
2006
HallHanson, R.E., Harmer, R.E., Blenkinsop, T.G., Bullen, D.S., Dalziel, Gose, Hall, Kampunzu, Key, MukwakwamiMesoproterozoic intraplate magmatism in the Kalahari Craton: a review.Journal of African Earth Sciences, Vol. 46, 1-2, pp. 141-167.Africa, South AfricaMagmatism
DS200612-0528
2006
HallHanson, R.E., Harmer,Blenkinsop, Bullen, Dalziel, Gose, Hall, Kampunzu, Key, Mukwakwami, Munyaniwa, Pancake, Seidel, WardMesoproterozoic intraplate magmatism in the Kalahari Craton: a review.Journal of African Earth Sciences, In press available,Africa, South AfricaAlkaline rocks, carbonatite, Premier kimberlite cluster
DS1988-0281
1988
Hall, A.Hall, A.Crustal contamination of minette magmas, evidence from their ammoniumcontentsNeues Jahrb. F. Mineralogie, Monatshefte, Vol. 1988, No. 3, pp. 137-143GlobalGeochemistry, Minettes
DS1988-0282
1988
Hall, A.Hall, A.Crustal contamination of minette magmas: evidence from theirammoniumcontentsNeues Jahrbuch fnr Mineralogie Monatsch, No. 3, pp. 137-143GlobalMinette
DS1998-0977
1998
Hall, A.McDonald, J.A., Pokhilenko, N., Melnyk, W., Hall, A.Camsell Lake kimberlites, Slave Province, northwest TerritoriesGeological Society of America (GSA) Annual Meeting, abstract. only, p.A245.Northwest TerritoriesExploration - history outline, Deposit - Camsell Lake, Snap Lake, dike
DS2002-1032
2002
Hall, A.McDonald, J.A., Pokhilenko, N., Melnyk, W., Hall, A.Camsell Lake kimberlites, Slave Province, Northwest TerritoriesCanadian Institute of Mining and Metallurgy, Vol. 53, Industrial Minerals of Canada, pp. 361-2.Northwest TerritoriesHistory - exploration
DS1995-0726
1995
Hall, A.C.Hall, A.C.Nothing down.... experiences in South America from 1952-1957Society for Mining, Metallurgy and Exploration (SME) Foundation, 168p. approx. $ 25.00South America, Peru, BoliviaBook -ad, History
DS1984-0332
1984
Hall, A.E.Hall, A.E., Smith, C.B.Lamproite Diamonds - Are They Different?University of Western Australia - Special Publication, No. 8, PP. 167-212.AustraliaOccurrence
DS1984-0333
1984
Hall, A.E.Hall, A.E., Smith, C.B.Lamproite Diamonds Are They Different?Kimberlite Occurrence And Origin A Basis For Conceptual Mode, PP. 21-22. (abstract.)Australia, Western Australia, Kimberley RegionDiamond Morphology, Nodules, Mineralogy, Argyle
DS1986-0400
1986
Hall, A.E.Jaques, A.L., Sheraton, J.W., Hall, A.E., Smith, C.B. , Sun, S.S.Composition of crystalline inclusions and C-isotopic composition of Argyle and Ellendale diamonds #2Geological Society of Australia Abstract Series, No. 16, pp. 426-428. (Abstract)AustraliaMineralogy
DS1986-0401
1986
Hall, A.E.Jaques, A.L., Sheraton, J.W., Hall, A.E., Smith, C.B., Sun, S-S.Composition of crystalline inclusions and C-isotopic composition of Argyle and Ellendale diamonds #1Proceedings of the Fourth International Kimberlite Conference, Held, No. 16, pp. 426-428AustraliaDiamond inclusions
DS1986-0506
1986
Hall, A.E.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
DS1989-0705
1989
Hall, A.E.Jaques, A.L., Hall, A.E., Sheraton, J.W., Smith, C.B., Sun, S-S.Composition of crystalline inclusions and C-isotopic composition of Argyle and Ellendale diamondsGeological Society of Australia Inc. Blackwell Scientific Publishing, Special, No. 14, Vol. 2, pp. 966-989AustraliaDeposit -Argyle, Ellendale, Diamond inclusions
DS1989-0706
1989
Hall, A.E.Jaques, A.L., Hall, A.E., Sheraton, J.W., Smith, Chris B., Sun, S-S.Nature and origin of West Australian diamonds: evidence from mineral inclusions and C-isotopic compositionsMinpet 89 Mineralogy And Petrology Symposium Held Sydney, February, p. 11. AbstractAustraliaDiamond morphology, Inclusions
DS1989-0901
1989
Hall, A.E.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
DS1991-0779
1991
Hall, A.E.Jacques, A.L., Hall, A.E., Sheraton, J., Smith, C.B., Roksandic, Z.Peridotitic paragenesis planar octahedral diamonds from the Ellendale lamproite pipes, western AustraliaProceedings of Fifth International Kimberlite Conference held Araxa June 1991, Servico Geologico do Brasil (CPRM) Special, pp. 202-204AustraliaEllendale, Carbon isotope, Diamond morphology
DS1991-1608
1991
Hall, A.E.Smith, C.B., Haebig, A.E., Hall, A.E.Patterns of diamond and kimberlite indicator mineral dispersal in the Kimberley region, western AustraliaProceedings of Fifth International Kimberlite Conference held Araxa June 1991, Servico Geologico do Brasil (CPRM) Special, pp. 376-379AustraliaHeavy mineral sampling, weathering, Lamproites, kimberlites, Argyle type diamonds
DS1991-1609
1991
Hall, A.E.Smith, C.B., Lucas, H., Hall, A.E., Ramsey, R.R.Diamond prospectivity from indicator mineralogy: a western AustralianperspectiveProceedings of Fifth International Kimberlite Conference held Araxa June 1991, Servico Geologico do Brasil (CPRM) Special, pp. 380-382AustraliaHeavy mineral sampling, Hadfields, Pteropus, Argyle, Ellendale, peridotite, harzburgite, lherzolite, Skerring
DS1994-0838
1994
Hall, A.E.Jaques, A.L., Hall, A.E., Sheraton, J., Smith, C.B., Roksandic, Z.Peridotitic planar octahedral diamonds from the Ellendale lamproite Western Australia.Proceedings of Fifth International Kimberlite Conference, Vol. 2, pp. 69-77.AustraliaDiamond morphology, Deposit -Ellendale
DS1994-1628
1994
Hall, A.E.Smith, C.B., Lucas, H., Hall, A.E., Ramsay, R.R.Diamond prospectivity and indicator mineral chemistry: a western Australianperspective.Proceedings of Fifth International Kimberlite Conference, Vol. 2, pp. 312-318.AustraliaGeochemistry, Diamond exploration
DS2002-1328
2002
Hall, A.E.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
DS2003-1093
2003
Hall, A.E.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
DS200412-1564
2003
Hall, A.E.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
Hall, A.E.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
DS200912-0702
2009
Hall, A.E.Smith, C.B., Bulanova, G.P., Kohn, S.C., Milledge, H.J., Hall, A.E., Griffin, B.J., Pearson, D.G.Nature and genesis of Kalimantan diamonds.Lithos, In press available, 38p.Indonesia, KalimantanAlluvials, diamond morphology
DS201812-2885
2018
Hall, A.E.Smith, C.B., Atkinson, W.J., Tyler, E.W.J., Hall, A.E., Macdonald, I.Argyle deposit: The discovery of the Argyle pipe, western Australia: the world's first lamproite-hosted diamond mine.Society of Economic Geology Geoscience and Exploration of the Argyle, Bunder, Diavik, and Murowa Diamond Deposits, Special Publication no. 20, pp. 49-64.Australia, western Australiadeposit - Argyle
DS1900-0250
1904
Hall, A.L.Hall, A.L.Die Bergindustrie. Transvaal im 1902-1903Zeitschr. F. Prakt. Geol., Vol. 12, PP. 187-188.Africa, South AfricaCurrent Activities
DS1900-0251
1904
Hall, A.L.Hall, A.L.Ueber Einige Neue Diamant lagerstatten TransvaalsZeitschr. F. Prakt. Geol., Vol. 12, PP. 193-199. ALSO: GEOL. CENTRALL BL., Vol. 6, PP.Africa, South AfricaPremier Mine
DS1900-0262
1904
Hall, A.L.Kynaston, H., Hall, A.L.Diamondiferous DepositsTransvaal Geological Survey Annual Report For 1903, PP. 43-47.South Africa, TransvaalDiamond Occurrences, Mineral Resources
DS1900-0321
1905
Hall, A.L.Hall, A.L.The Geology of Pretoria and Neighbourhood. an Explanation Of the Geological Map of the Environs of Pretoria.Pretoria: Transvaal Mines Department Geological Survey Memoir., No. 1, 55P.Africa, South AfricaRegional Geology, Premier Mine
DS1900-0337
1905
Hall, A.L.Kynaston, H., Hall, A.L.The Geological Features of the Diamond Mines of the Pretoria District.South African Association Advanced Science, Vol. 1, PP. 182-196.South Africa, TransvaalPremier Mine, Kimberlite Mines And Deposits
DS1900-0408
1906
Hall, A.L.Hall, A.L., Steart, F.A.On Folding and Faulting in the Pretoria Series and the Dolomite.Geological Society of South Africa Transactions, Vol. 8, PP. 7-15.Africa, South AfricaGeology, Structure
DS1900-0559
1907
Hall, A.L.Hall, A.L., Trevor, T.G.Serpentine Rocks Occurring North of PietersburgGeological Society of South Africa Proceedings, Vol. 9, P. XLVI.Africa, South AfricaDiamond Occurrence, Petrography
DS1920-0465
1929
Hall, A.L.Rogers, A.W., Hall, A.L., Wagner, P.A., Haughton, S.H.The Union of South AfricaHeidelberg: C. Winters Universitaetsbuchhandlung, 232P.South AfricaRegional Geology, Kimberley
DS1930-0192
1935
Hall, A.L.Hall, A.L.Mineral Wealth in the Outside Districts of the TransvaalGeological Society of South Africa Transactions, Vol. 37, PP. 171-204.South AfricaMineral Resources
DS1985-0258
1985
Hall, A.M.Hall, A.M., Thomas, M.F., Thorp, M.B.Later Quaternary Alluvial Placer Development in the Humid Tropics: the Case of the Birim Diamond Placer, Ghana.Journal of the Geological Society of London., Vol. 142, PP. 777-787.West Africa, GhanaGeomorphology, Stratigraphy, Diamond Distribution, Sorting Mech
DS1996-0158
1996
Hall, C.Boundy, T.M., Essene, E.J., Hall, C., Austrheim, HallidayRapid exhumation of lower crust during continent-continent collision and Late extension...Geological Society of America (GSA) Bulletin., Vol. 108, No. 11, Nov. pp. 1425-37.NorwayCaledonian Orogeny, Geochronology
DS1996-0584
1996
Hall, C.Hall, C.Landmarks in the Natural History Museum's acquisition of gemsMineral Industry International., No. April, pp.GlobalHistory MuseuM., Collections -Pain, Church, Matthews
DS200512-0391
2004
Hall, C.Hall, C., Godfried, H.Diamond anvils.Rough Diamond Review, No. 6, Sept.pp.Diamond anvil
DS1995-2080
1995
Hall, C.E.Worley, B.A., Cooper, A.F., Hall, C.E.Petrogenesis of carbonate bearing nepheline syenites and carbonatites From southern Victoria Land.Lithos, Vol. 35, pp. 193-199.GlobalGeochemistry, Carbonatite, Calcite-graphite
DS2003-0532
2003
Hall, C.E.Hall, C.E., Gurnis, M., Sdrolias, M., Lavier, L., Muller, R.D.Catastrophic initiation of subduction following forced convergence across fractureEarth and Planetary Science Letters, Vol. 212, 1-2, pp. 15-30.MantleBlank
DS200412-0762
2003
Hall, C.E.Hall, C.E., Gurnis, M., Sdrolias, M., Lavier, L., Muller, R.D.Catastrophic initiation of subduction following forced convergence across fracture zones.Earth and Planetary Science Letters, Vol. 212, 1-2, pp. 15-30.MantleTectonics
DS200612-0767
2006
Hall, C.E.Lassak, T.M., Fouch, M.J., Hall, C.E., Kaminski, E.Seismic characterization of mantle flow in subduction systems: can we resolve a hydrated mantle wedge?Earth and Planetary Science Letters, Vol. 243, 3-4, March 30, pp. 632-649.MantleSubduction, water
DS1985-0261
1985
Hall, C.M.Hanes, J.A., York, D., Hall, C.M.An 40 Ar-39 Ar geochronological and electron microprobe investigation of an Archean pyroxenite and its bearing on ancient atmospheric compositions.Canadian Journal of Earth Sciences, Vol. 22, pp. 947-58.MantleUltramafic Rocks - Not Specific To Diamonds, Argon, Geochronology
DS1997-1301
1997
Hall, C.M.Zhao, D., Essene, E.J., Zhang, Y., Hall, C.M., Wang, L.Newly discovered kimberlites and mantle xenoliths from Somerset Island and Brodeur Peninsula: pressure, tempnorthwest Territories Geology Division, DIAND., EGS 199-05, $ 5.50Northwest Territories, Somerset Island, Brodeur PeninsulaGeochronology, oxygen fugacity, volatile content
DS1993-0615
1993
Hall, C.R.J.Hall, C.R.J.Development capital finance for smaller companiesMining Industry International, No. 1010, January pp. 17-18OntarioEconomics, Ore reserves, Ateba
DS2003-0206
2003
Hall, D.Canil, D., Schulze, D.J., Hall, D., Hearne, B.J.Jr., Milliken, S.M.Lithospheric roots beneath western Laurentia: the geochemical signal in mantle garnetsCanadian Journal of Earth Sciences, Vol. 40, 8, Aug. pp. 1027-51.Wyoming, British ColumbiaTectonics,geochemistry, geochronology, Ni thermometry
DS200412-0266
2003
Hall, D.Canil, D., Schulze, D.J., Hall, D., Hearne, B.J.Jr., Milliken, S.M.Lithospheric roots beneath western Laurentia: the geochemical signal in mantle garnets.Canadian Journal of Earth Sciences, Vol. 40, 8, Aug. pp. 1027-51.United States, WyomingTectonics,geochemistry, geochronology, Ni thermometry
DS1986-0332
1986
Hall, D.C.Hall, D.C., Helmsaedt, H., Schulze, D.J.The Cross diatreme: a kimberlite in a young orogenic beltProceedings of the Fourth International Kimberlite Conference, Held Perth, Australia, No. 16, pp. 30-32British ColumbiaPetrography
DS1987-0270
1987
Hall, D.C.Hall, D.C., Helmstaedt, H., Schulze, D.J.The Cross diatreme, British Columbia, Canada: a kimberlite in a young orogenic belt #2Fourth International Kimberlite Conference, 26p. 7 figsBritish ColumbiaCanada, Diatreme
DS1988-0298
1988
Hall, D.C.Helmstaedt, H.H., Mott, J.A., Hall, D.C., Schulze, D.J., DixonStratigraphic and structural setting of intrusive breccia diatremes In the White River-Bulletin River area, southeastern British ColumbiaBritish Columbia Department of Mines, Geological Fieldwork 1987, Paper 1988-1, pp. 363-368British ColumbiaBlank
DS1989-0572
1989
Hall, D.C.Hall, D.C., Helmstaedt, H., Schulze, D.J.The Cross diatreme, British Columbia, Canada: akimberlite in a young orogenic belt #1Geological Society of Australia Inc. Blackwell Scientific Publishing, No. 14, Vol. 1, pp. 97-108British ColumbiaDiatreme, Cross
DS1991-0649
1991
Hall, D.C.Hall, D.C.A petrological investigation of the Cross kimberlite occurrence, southeastern British ColumbiaPh.d. thesis, Queen's University, 536p. fiche only availableBritish ColumbiaCross occurrence, Petrology
DS1992-1702
1992
Hall, D.C.Wynne, P.J., Irving, E., Schulz, D.J., Hall, D.C., Helmstaedt, H.H.Paleomagnetism and age of three Canadian Rocky Mountain diatremesCanadian Journal of Earth Sciences, Vol. 29, No. 1, January pp. 35-47British ColumbiaDiatremes -Cross, Blackfoot, HP pipe, Paleomagnetics
DS200512-0392
2005
Hall, D.C.Hall, D.C.Exotic metasomatic oxides in a rutile nodule from the Orapa kimberlite, Botswana.GAC Annual Meeting Halifax May 15-19, Abstract 1p.Africa, BotswanaOrapa - mineralogy
DS1960-1168
1969
Hall, D.H.Mcgrath, P.H., Hall, D.H.Crustal Structure in Northwestern Ontario: Regional Magnetic Anomalies.Canadian Journal of Earth Sciences, Vol. 6, PP. 101-107.GlobalMid-continent, Geophysics
DS1970-0303
1971
Hall, D.H.Hall, D.H.Geophysical Determination of Deep Crustal Structure in Manitoba.Geological Association of Canada (GAC) SPECIAL PAPER., No. 9, PP. 83-88.GlobalMid-continent, Geophysics
DS1970-0706
1973
Hall, D.H.Hall, D.H.Deep Seismic Crustal Studies in ManitobaSeismological Soc. American Bulletin., Vol. 63, PP. 885-950.GlobalMid-continent, Geophysics
DS1970-0921
1974
Hall, D.H.Hall, D.H.Long Wavelength Aeromagnetic Anomalies and Deep Crustal Magnetization in Manitoba and Northwestern Ontario.Geophysics, Vol. 40, PP. 403-430.GlobalMid-continent, Geophysics
DS200612-0522
2006
Hall, D.J.Hall, D.J.Risk in exploration: managing for success.SEG 2006 Conference, Wealth Creation in the Minerals Industry, May 14-16, Keystone Colorado USA, Abtract Volume POSTER only p. 139-143. ( 5p.)GlobalEconomics - risk strategies
DS1988-0649
1988
Hall, D.R.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.
DS201604-0610
2016
Hall, E.M.G.Hall, E.M.G., McClenaghan, M.B., Page, L.Application of portable XRF to the direct analysis of till samples from various deposit types in Canada.Geochemistry, Exploration, Environment, Analysis, Vol. 16, pp. 62-84.Canada, Northwest TerritoriesKimberlite - Triple B mentioned

Abstract: In this study, results by direct portable XRF (‘pXRF’) on unsieved till samples were compared with those by established laboratory methods (aqua regia or fusion ICP-MS and ICP-ES) on the <0.063-mm fraction to determine if the application of direct pXRF in the field would serve as an acceptable guide for immediate follow-up work. Four test sites in Canada were chosen: the Halfmile Lake Cu-Pb-Zn VMS deposit; the intrusion-hosted W-Mo Sisson deposit; a Pb-Zn Mississippi Valley-type (MVT) deposit in the Pine Point district; and the Triple B kimberlite. Unsieved till samples from the GSC archive collection were used for this study and included samples from background areas, immediately overlying, and at various distances down-ice of each deposit. Ziploc® and Whirl-Pak® bags that were used to contain the samples in the field were tested for their properties of X-ray attenuation and contamination. In general, the performance of pXRF in the four test areas was very good where concentrations of elements of interest (indicator or pathfinder elements) were substantially above detection limits by this technique (in the low ppm range for many elements). The following elements, shown to be useful indicator elements (important constituents of the ore/commodity) or pathfinder elements (those associated with the commodity elements) by the established methodology, showed similar patterns by pXRF on the unsieved material: Zn, Cu, Pb, and As at Halfmile Lake; W, Mo, Cu, Zn, Pb, and As at the Sisson deposit; Zn, Pb, and Fe at Pine Point; and Ca, Sr, Cr, and Ni at Triple B. Pathfinder elements whose concentrations were too low for determination by pXRF include: Ag and Sb at Halfmile Lake; Ag and Cd at Sisson; Cd, S, and Se at Pine Point; and Co, Mg, P, U, and Th at Triple B. The high background for Bi by pXRF, equivalent to c. 50?ppm, and its noisy signal precluded its use at Halfmile Lake and Sisson. Elements which tended to show poor precision (three analyses each sample) by pXRF in some samples due to sample heterogeneity include Sn, V, and W. Mercury was erroneously reported for the majority of samples in the low ppm range by pXRF whereas its concentration in fact was in the low ppb range. Several Pb-, Zn- (c. 1% Pb, Zn) and Fe-rich (up to 16% Fe) samples demonstrated spectral interferences by: Pb on As, Th and Se; Zn on Cu; and Fe on Co. Results for six till samples analysed in Ziploc® and Whirl-Pak® bags showed that Ziploc® absorbs fewer low-energy photons and hence is preferable for determining light elements such as Si, K and Ca.
DS2003-0533
2003
Hall, F.Hall, F.Community/Aboriginal agreements. IN: Mining agreements: deal makers and dealMinerals Economics Society 13th. Symposium, Toronto, January 20, 2p.GlobalMining agreements - legal
DS2001-1050
2001
Hall, G.Seneshen, D., Grunsky, E., Rencz, A., Hall, G., Dunn, C.Geochemical exploration for kimberlites in northern Alberta37th. Forum Industrial Minerals;, May 23-5, pp. 33-4.AlbertaGeochemistry
DS1990-0638
1990
Hall, G.E.M.Hall, G.E.M., Plant, J.A.Are your rare earth elements (REE) results total?Explore, No. 68, June pp. 18-20GlobalGeochemistry, Analyses -rare earth elements (REE).
DS1992-0655
1992
Hall, G.E.M.Hall, G.E.M., Plant, J.A.Analytical errors in the determination of high field strength elements and their implications in tectonic interpretation studiesChemical Geology, Vol. 95, No. 1-2, January 1, pp. 141-156GlobalGeochemistry -analysis, Tectonics
DS1993-0079
1993
Hall, G.E.M.Barefoot, R.R., Van Loon, J.C., Hall, G.E.M.Analytical methods: field and remote locationsAnalysis of geological materials, editor C. Riddle, pp. 221-261GlobalGeochemistry, Analysis -techniques -general
DS1993-1393
1993
Hall, G.E.M.Schmitt, H.R., Cameron, E.M., Hall, G.E.M., Viave, J.Mobilization of gold into lake sediments from acid and alkaline mineralized environments in the southern Canadian shield: gold in lake sediments andnat.watersJournal of Geochemical Exploration, Vol. 48, No. 3, August pp. 329-358Ontario, Saskatchewan, ManitobaGold geochemistry, Alkaline rocks
DS1994-0527
1994
Hall, G.E.M.Flight, D.M.A., Hall, G.E.M., Simpson, P.R.Regional geochemical mapping of Platinum, Palladium, and gold over an obducted ophiolite complex, Shetland IslandsInstitute of Mining and Metallurgy (IMM) Bulletin, Vol. 103, pp. B68-78ScotlandGeochemistry, Platinum, palladium, gold
DS1995-0727
1995
Hall, G.E.M.Hall, G.E.M.Sample preparation and decompositionBiological systems in mineral exploration and processing, pp. 427-442GlobalGeochemistry, Sample preparation techniques
DS1995-0728
1995
Hall, G.E.M.Hall, G.E.M.Analytical techniques and methodsBiological systems in mineral exploration and processing, pp. 443-490GlobalGeochemistry, Techniques - Spectrometry
DS2002-0641
2002
Hall, G.E.M.Hamilton, S.M., Cameron, S.C.M., McClenaghan, M.B., Hall, G.E.M.Thick overburden geochemical methods: studies over volcanogenic massive sulphideOntario Geological Survey Open File, Summary of Field Work, No. 6100, pp. 27-1-17.Ontario, TimminsGeochemistry
DS200612-0888
2006
Hall, G.E.M.McClenaghan, M.B., Hamilton, S.M., Hall, G.E.M., Burt, A.K., Kjarsgaard, B.A.Selective leach geochemistry of soils overlying the 95-2, B30 and A4 kimberlites, northeast Ontario.Geological Survey of Canada Open File, OF 5069, 28p. $ 9.00Canada, OntarioGeochemistry
DS201412-0334
2014
Hall, G.E.M.Hall, G.E.M., Bonham-Carter, G.F., Buchar, A.Evaluation of portable X-ray fluorescence (pXRF) in exploration and mining: Phase 1, control reference materials.Geochemistry: Exploration, Environment, Analysis, Vol. 14, 2, pp. 99-123.TechnologypXRF
DS201412-0567
2013
Hall, G.E.M.McClenaghan, M.B., Plouffe, A., McMartin, I., Campbell, J.E., Spirito, W.A., Paulen, R.C., Garrett, R.G., Hall, G.E.M.Till sampling and geochemical analytical protocols used by the Geological Survey of Canada.Geochemistry: Exploration, Environment, Analysis, Vol. 13, pp. 285-301.TechnologySampling
DS201312-0354
2013
Hall, G.EM.Hall, G.EM., McClenaghan, M.B.Field portable XRF in exploration and mining.GSC Open file 7374 Ftp2.cits.rncan.gc.ca, pp. 75-85.TechnologyXRF
DS1988-0283
1988
Hall, G.G.Hall, G.G., Mizukami, Y.A new method of calculating the spin density of trapped muonium indiamondChem. Phys. Letters, Vol. 150, No. 1-2, pp. 23-28GlobalDiamond morphology, MuoniuM.
DS1930-0193
1935
Hall, G.M.Hall, G.M., Amick, H.C.Mica Peridotite in TennesseeAmerican Mineralogist., Vol. 20, No. 3, PP. 204-205.United States, Appalachia, TennesseeRelated Rocks, Geology
DS1940-0085
1944
Hall, G.M.Hall, G.M., Amick, H.C.Igneous Rock Regions in the Norris RegionJournal of GEOLOGY, Vol. 52, PP. 424-430.United States, Appalachia, TennesseeRelated Rocks, Geology
DS1860-0844
1894
Hall, J.Hall, J., Darton, N.P.Geology of the Mohawk Valley in Herkimer, Fulton, Montgomery and Saratoga Counties.Thirteenth Annual Report Geological Survey New York, Vol. 1, PP. 409-429.United States, New YorkGeology
DS1986-0333
1986
Hall, J.Hall, J.Geophysical lineaments and deep continental structureIn: Major crustal lineaments and their influence on the geol. hist. of, Vol. 1317, 200p. pp. 33-44GlobalTectonics, Structure
DS1988-0765
1988
Hall, J.Wright, J.A., Hall, J.Anomalous crustal structure from deep seismic profiling in theKarooBasin, BotswanaEuropean Association of Exploration Geophysicists, abstract volume, 50th, p. 140. abstract onlyBotswanaBlank
DS1990-1585
1990
Hall, J.Wright, J.A., Hall, J.Deep seismic profiling in the Nosop Basin, Botswana:cratons, mobile belts and sedimentary basinsTectonophysics, Vol. 174, No. 1/2, March 1, pp. 333-344BotswanaGeophysics -seismics, Nosop Basin
DS1994-0701
1994
Hall, J.Hall, J., Quinlan, G.A collisional crustal fabric pattern recognized from seismic reflection profiles of Appalachian/CaledonianTectonophysics, Vol. 232, 1-4, pp. 31-42Appalachia, United StatesGeophysics -seismics, Tectonics, Orogeny
DS1995-0729
1995
Hall, J.Hall, J., et al.Proterozoic orogens of the northeastern canadian shield: new formation From the Lithoprobe ESCOOT.Canadian Journal of Earth Sciences, Vol. 32, pp. 1119-31.Quebec, Labrador, UngavaGeophysics - seismics, crustal reflection, Makkovik province
DS1995-0730
1995
Hall, J.Hall, J., Wardle, R.J., Gower, C.F., Kerr, A., Coffin, KeenProterozoic orogens of the northeastern Canadian Shield: new information from Lithoprobe ESCOOT seismicsCanadian Journal of Earth Sciences, Vol. 32, No. 8, Aug. pp. 1119-1131.GlobalGeophysics -seismics ESCOOT., Nain, Makkovik provinces
DS1997-0433
1997
Hall, J.Gower, C.F., Hall, J., Kifoil, G.J., Quinlan, WardleRoots of the Labradorian orogen in the Grenville Province in southeastLabrador: evidence from seismic.Tectonics, Vol. 16, No. 5, Oct. pp. 795-809Labrador, Quebec, UngavaGeophysics - seismics offshore, Model - Gravity, geodynamics, tectonics
DS1997-0586
1997
Hall, J.Kerr, A., Hall, J., Wardle, R.J., Gower, C.F., Ryan, B.New reflections on the structure and evolution of the Makkovikian Ketilidian Orogen in Labrador and GreenlandTectonics, Vol. 16, No. 6, Dec. pp. 942-965.Labrador, GreenlandTectonics, Geophysics - seismology
DS2001-0349
2001
Hall, J.Funck, T., Lowden, K.E., Hall, J.Wide angled reflectivity across Torngat Orogen northeast CanadaGeophysical Research Letters, Vol. 28, No. 18, Sept. 15, pp. 3541-44.Quebec, Ungava, LabradorGeophysics - seismics, Orogeny
DS2002-0635
2002
Hall, J.Hall, J., Louden, K.E., Funck, T., Deemer, S.Geophysical characteristics of the continental crust along the Lithoprobe Eastern Canadian Shield Onshore-Offshore Transect (ECSOOT): a review.Canadian Journal of Earth Science, Vol.39,5, May, pp.569-87.Quebec, Labrador, Baffin IslandGeophysics - ESCOOT, Tectonics
DS2002-1687
2002
Hall, J.Wardle, R.J., Hall, J.Proterozoic evolution of the northeastern Canadian Shield: lithoprobe eastern CanadianCanadian Journal of Earth Science, Vol.39,5, May, pp.563-7.Quebec, Labrador, Baffin IslandGeophysics - ESCOOT, Tectonics
DS2002-1688
2002
Hall, J.Wardle, R.J., James, D.T., Scott, D.J., Hall, J.The southeastern Churchill Province: synthesis of a Paleoproterozoic transpressional orogen.Canadian Journal of Earth Science, Vol.39,5, May, pp.639-63.Quebec, Labrador, Baffin IslandGeophysics - Torngat, New Quebec orogens, Trans Hudson, Tectonics - Nain, Superior Craton
DS201012-0118
2010
Hall, J.Cook, F.A., White, D.J., Jones, A.G., Eaton, D.W.S., Hall, J., Clowes, R.M.How the crust meets the mantle: lithoprobe perspectives on the Mohorovicic.Canadian Journal of Earth Sciences, Vol. 47, 4, pp. 315-351.Mantle, CanadaGeophysics - seismic
DS1982-0457
1982
Hall, J.K.Neev, D., Hall, J.K.A Global System of Spiraling GeosuturesJournal of Geophysical Research, Vol. 87, No. B 13, PP. L0689-L0, 708.GlobalTectonics
DS1985-0259
1985
Hall, J.M.Hall, J.M.The Iceland Research Drilling Project: variation of magnetic properties with depth in Icelandic type oceanic crust.Canadian Journal of Earth Sciences, Vol. 22, pp. 85-101.GlobalGeophysics - Magnetics
DS1986-0334
1986
Hall, J.M.Hall, J.M., Walls, C.C.The relationship bewteen dike density in horizontal and vertical profiles through dike swarmsGeological Association of Canada (GAC) Annual Meeting, Vol. 11, p. 76. (abstract.)GlobalDyke
DS1988-0284
1988
Hall, J.M.Hall, J.M., Fisher, B.E.The Iceland research drilling project crustal section: stable remagnetization below 3 Km crustal depth.Canadian Journal of Earth Sciences, Vol. 25, pp. 1304-15.GlobalCrust, magnetite
DS1989-0573
1989
Hall, J.M.Hall, J.M.The study of major faults in Canada by drilling: a CCDP workshop reportGeoscience Canada, Vol. 16, No. 1, March pp. 31-34OntarioTectonics, Faults
DS200412-2109
2003
Hall, K.White, D.J., Musacchio, G., Helmstaedt, H.H., Harrap, R.M., Thurston, P.C., Van der Velden, A., Hall, K.Images of lower crustal oceanic slab: direct evidence for tectonic accretion in the Archean western Superior Province.Geology, Vol. 31, 11, pp. 997-1000.Canada, OntarioSubduction - not specific to diamonds
DS2003-0270
2003
Hall, K. W.Cook, F.A., Lynn, C.E., Hall, K. W.Cross strike potential field anomalies in the Canadian CordilleraCanadian Journal of Earth Sciences, Vol. 40, 1, pp. 1-11.British ColumbiaGeophysics, Dikes, dykes
DS1997-0213
1997
Hall, K.W.Cook, F.A., Van der Velden, A.J., Hall, K.W., Roberts, B.R.Upper mantle reflectors beneath the SNORCLE transect - images of the base of the lithosphere.Lithoprobe Slave/SNORCLE., pp. 58-62.MantleGeophysics - seismics
DS1998-0270
1998
Hall, K.W.Cook, F.A., Van der Velden, A.J., Hall, K.W., Roberts, B.R.Tectonic delamination and subcrustal imbrication of the Precambrian lithosphere in northwestern Canada...Geology, Vol. 26, No. 9, Sept. pp. 839-42.Northwest TerritoriesLithoprobe - Slave Province, Geophysics - seismics
DS1998-0562
1998
Hall, K.W.Hall, K.W., Cook, F.A.Geophysical transect of the Eagle Plains foldbelt and Richardson Mountainsanticlinorium, northwestern CanadaGeological Society of America (GSA) Bulletin., Vol. 110, No.3 March, pp. 311-325.Northwest Territories, YukonGeophysics, Structure, tectonics
DS1999-0146
1999
Hall, K.W.Cook, F.A., Van der Velden, A.J., Hall, K.W.Frozen subduction in Canada's Northwest Territories: Lithoprobe deep lithospheric reflection profiling....Tectonics, Vol. 18, No. 1, Feb. pp. 1-24.Northwest TerritoriesGeophysics - seismics, Lithoprobe western Canadian Shield
DS200412-0357
2004
Hall, K.W.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
DS200512-0187
2005
Hall, K.W.Cook, F.A., Hall, K.W., Lynn, C.E.The edge of northwestern North America at ~1.8 Ga.Canadian Journal of Earth Sciences, Vol. 42, 6, June pp. 983-997.Canada, Northwest Territories, NunavutGeophysics - seismics, lithoprobe
DS200612-0756
2006
Hall, K.W.Kynn, C.E., Cook, F.A., Hall, K.W.Tectonic significance of potential field anomalies in western Canada: results from the Lithoprobe SNORCLE transect.Canadian Journal of Earth Sciences, Vol. 42, 6, pp. 1239-1255.Canada, Northwest TerritoriesGeophysics - seismics
DS1997-0961
1997
Hall, M.Robin, C., Hall, M., Jiminez, M et al.MojAnd a volcanic comple: development of two adjacent contemporaneous volcanoes with contrasting eruptive ..Journal of South American Earth Sci, Vol. 10, No. 5-6, pp. 345-59EcuadorMagma suites, Geodynamics, geochemistry, volcanics
DS2002-0851
2002
Hall, M.King, J.M., Shigley, J.E., Guhin, S.S., Gelb, T.H., Hall, M.Characterization and grading of natural colour pink diamondsGems & Gemology, Vol. 38, Summer, pp. 128-147.Australia, India, Brazil, South AfricaDiamonds - pink ( database of 1500 ), Notable - list ( more than 9 cts each)
DS2002-0852
2002
Hall, M.King, J.M., Shigley, J.E., Guhin, S.S., Gelb, T.H., Hall, M.Box A: understanding the relationship of pink and "red" diamonds in GIA colour grading system.Gems & Gemology, Vol. 38, Summer, pp. 134-140.GlobalDiamonds - pink, red
DS2003-1450
2003
Hall, M.Wang, W., Moses, T., Linares, R.C., Shigley, J.E., Hall, M., Butler, J.E.Gem quality synthetic diamonds grown by a chemical vapor deposition ( CVD)Gems & Gemology, Vol. 39, Winter,pp. 268-283.GlobalBlank
DS200412-2083
2003
Hall, M.Wang, W., Moses, T., Linares, R.C., Shigley, J.E., Hall, M., Butler, J.E.Gem quality synthetic diamonds grown by a chemical vapor deposition ( CVD) method.Gems & Gemology, Vol. 39, Winter,pp. 268-283.TechnologySynthetic diamond
DS200512-0532
2005
Hall, M.King, J.M., Shigley, J.E., Gelb, T.H., Guhin, S.S., Hall, M., Wang, W.Characterization and grading of natural colour yellow diamonds.Gems & Gemology, Vol. 41, 2, Summer pp. 88-115.GlobalHistory, genesis, origin, cut
DS200812-1238
2007
Hall, M.Wang, W., Hall, M., Breeding, C.M.Natural TYPE 1A diamond with green yellow colour due to Ni related defects.Gems & Gemology, Fall, pp. 240-243.TechnologyDiamond - IA
DS200512-1167
2005
Hall, M.S.Wang, W., Smith, C.P., Hall, M.S., Breeding, C.M., Moses, T.M.Treated color pink to red diamonds from Lucent Diamonds Inc.Gems & Gemology, Vol. 41, 1, Spring pp. 6-19.Diamond - treatment, Lucent
DS200612-1508
2005
Hall, M.S.Wang, W., Tallaire, A., Hall, M.S., Moses, T.M., Achard, J., Sussmans, R.S., Gicquel, A.Experimental CVD synthetic diamonds form LIMPH-CNRD France.Gems & Gemology, Vol. 41, 3, Fall, pp. 234244.TechnologySynthetic diamonds
DS200712-0977
2007
Hall, M.S.Shen, A.H., Wang, W., Hall, M.S., Novak, S., McClure, S.F., Shigley, J.E., Moses, T.M.Serenity coated colored diamonds: detection and durability.Gems & Gemology, Vol. 43, 1, Spring pp. 16-34.TechnologyFancy diamonds
DS1960-1121
1969
Hall, P.K.Hall, P.K.The Diamond Fields of Sierra LeoneSierra Leone Geological Survey Bulletin., Vol. 1, No. 5, 133P.Sierra Leone, West Africa, Yengema, Koidu, Lower Moinde, YomadGeology, Kimberley, History, Exploration, Prospecting, Geomorpholog
DS2001-0435
2001
Hall, P.S.Hall, P.S., Kincaid, C.Diapiric flow at subduction zones: a recipe for rapid transportScience, No. 5526, June 29, pp. 2472-4.MantleSubduction - fluid flow
DS2003-0716
2003
Hall, P.S.Kincaid, C., Hall, P.S.Role of back arc spreading in circulation and melting at subduction zonesJournal of Geophysical Research, Vol.108, B5, 10.1029/2001JB001174MantleSubduction
DS200412-1004
2003
Hall, P.S.Kincaid, C., Hall, P.S.Role of back arc spreading in circulation and melting at subduction zones.Journal of Geophysical Research, Vol.108, B5, 10.1029/2001 JB001174MantleSubduction
DS201212-0281
2012
Hall, P.S.Hall, P.S.On the thermal evolution of the mantle wedge at subduction zones.Physics of the Earth and Planetary Interiors, Vol. 198-199, pp. 9-27.MantleSubduction
DS1985-0260
1985
Hall, R.Hall, R.Row Shakes Diamond State RulersObserver., JANUARY 27TH.West Africa, Sierra LeoneHistory, Politics, Jamil, Economics
DS1996-0585
1996
Hall, R.Hall, R., Blundell, D.Tectonic evolution of southeast AsiaGeological Society of London, Special Publication No. 106, 600p. approx. 175.00 UnitedPhilippines, Indonesia, Laos, Thailand, Papua New Guinea, ChinaBook -table of contents, Tectonics, ophiolites, Banda arc, orogeny, Bacan
DS1996-0586
1996
Hall, R.Hall, R., Blundell, D.J.Tectonic evolution of southeast Asia: introductionGeological Society of London Special Paper, No. 106, pp. Vii-XiiiGlobalTectonics
DS2002-0636
2002
Hall, R.Hall, R.Cenozoic geological and plate tectonic evolution of SE Asia and SW Pacific: computer based reconstructions....Journal of Asian Earth Sciences, Vol.20,4,pp.353-431.Asia, India, New GuineaTectonics, boundary
DS2002-0637
2002
Hall, R.Hall, R.Cenozoic geological and plate tectonic evolution of SE Asia and the SW Pacific: computer based reconstructions, model and animations.Journal of Asian Earth Sciences, Vol.20,4,April pp. 353-431.Asia, PacificTectonics - not specific to diamonds
DS2002-0638
2002
Hall, R.Hall, R.Cenozoic geological and plate tectonic evolution of SE Asia and the SW Pacific: computer based reconstructionsJournal of Asian Earth Sciences, Vol.20, 4, pp. 353-431.southeast Asia, southwest PacificMagmatism - boninite, Tectonics
DS2002-0980
2002
Hall, R.Macpherson, C.G., Hall, R.Timing and tectonic controls in the evolving orogen of SE Asia and the western Pacific and some implications for ore generation.Geological Society of London Special Publication, No. 204, pp.49-68.AsiaTectonics - not specific to diamonds
DS200412-0763
2004
Hall, R.Hall, R.Canadian emeralds... a rare blue aquamarine.Canadian Mining Journal, April, pp. 22-26.Canada, YukonNews item - history
DS200412-0765
2004
Hall, R.Hall,R., Spakman, W.Mantle structure and tectonic evolution of the region north and east of Australia.Hillis, R.R., Muller, R.D. Evolution and dynamics of the Australian Plate, Geological Society America Memoir, No. 372, pp. 361-382.AustraliaTectonics
DS200412-0828
2004
Hall, R.Hill, K.C., Hall, R.Mesozoic - Cenozoic evolution of Australia's New Guinea margin in a west Pacific context.Hillis, R.R., Muller, R.D. Evolution and dynamics of the Australian Plate, Geological Society America Memoir, No. 372, pp. 265-290.AustraliaTectonics
DS201312-0355
2013
Hall, R.Hall, R.Diamond mining in Canada's Northwest Territories: a colonial continuity.Antipode ( Blackwell Publishing), Vol. 45, 2, pp. 376-393.Canada, Northwest TerritoriesHistory
DS201502-0123
2014
Hall, R.White, L., Graham, I., Armstrong, R., Hall, R.Tracing the source of Borneo's Cempaka deposit.American Geophysical Union, December - Fall meeting in San Francisco, abstractAsia, KalimantanDeposit - Cempaka
DS201603-0431
2016
Hall, R.White, L.T., Graham, I., Tanner, D., Hall, R., Armstrong, R.A., Yaxley, G., Barron, L.The provenance of Borneo's enigmatic alluvial diamonds: a case study from Cempaka, SE Kalimantan.Gondwana Research, in press available 22p.Asia, KalimantanAlluvials, diamonds

Abstract: Gem-quality diamonds have been found in several alluvial deposits across central and southern Borneo. Borneo has been a known source of diamonds for centuries, but the location of their primary igneous source remains enigmatic. Many geological models have been proposed to explain their distribution, including: the diamonds were derived from a local diatreme; they were brought to the surface through ophiolite obduction or exhumation of UHP metamorphic rocks; they were transported long distances southward via major Asian river systems; or, they were transported from the Australian continent before Borneo was rifted from its northwestern margin in the Late Jurassic. To assess these models, we conducted a study of the provenance of heavy minerals from Kalimantan's Cempaka alluvial diamond deposit. This involved collecting U Pb isotopic data, fission track and trace element geochemistry of zircon as well as major element geochemical data of spinels and morphological descriptions of zircon and diamond. The results indicate that the Cempaka diamonds were likely derived from at least two sources, one which was relatively local and/or involved little reworking, and the other more distal which records several periods of reworking. The distal diamond source is interpreted to be diamond-bearing pipes that intruded the basement of a block that: (1) rifted from northwest Australia (East Java or SW Borneo) and the diamonds were recycled into its sedimentary cover, or: (2) were emplaced elsewhere (e.g. NW Australia) and transported to a block (e.g. East Java or SW Borneo). Both of these scenarios require the diamonds to be transported with the block when it rifted from NW Australia in the Late Jurassic. The local source could be diamondiferous diatremes associated with eroded Miocene high-K alkaline intrusions north of the Barito Basin, which would indicate that the lithosphere beneath SW Borneo is thick (~ 150 km or greater). The ‘local’ diamonds could also be associated with ophiolitic rocks that are exposed in the nearby Meratus Mountains.
DS201911-2531
2019
Hall, R.Hall, R.The subduction initiation stage of the Wilson cycle.N: Cycle Concepts in Plate Tectonics, editors Wilson and Houseman , Geological Society of London special publication 470, pp. 415-437.Mantleplate tectonics

Abstract: In the Wilson cycle, there is a change from an opening to a closing ocean when subduction begins. Subduction initiation is commonly identified as a major problem in plate tectonics and is said to be nowhere observable, yet there are many young subduction zones at the west Pacific margins and in eastern Indonesia. Few studies have considered these examples. Banda subduction developed by the eastwards propagation of the Java trench into an oceanic embayment by tearing along a former ocean-continent boundary. The earlier subducted slab provided the driving force to drag down unsubducted oceanic lithosphere. Although this process may be common, it does not account for young subduction zones near Sulawesi at different stages of development. Subduction began there at the edges of ocean basins, not at former spreading centres or transforms. It initiated at a point where there were major differences in elevation between the ocean floor and the adjacent hot, weak and thickened arc/continental crust. The age of the ocean crust appears to be unimportant. A close relationship with extension is marked by the dramatic elevation of land, the exhumation of deep crust and the spectacular subsidence of basins, raising questions about the time required to move from no subduction to active subduction, and how initiation can be identified in the geological record.
DS201803-0474
2017
Hall, R.A.Sepehri, M., Apel, D.B., Hall, R.A.Prediction of mining induced surface subsidence and ground movements at a Canadian diamond mine using electroplastic finite element model. International Journal of Rock Mechanics and Mining Sciences, Vol. 100, pp. 73-82.Canada, Northwest Territoriesdeposit - Diavik
DS1987-0271
1987
Hall, R.D.Hall, R.D., Hughes, D.J.Noritic dykes of southern West Greenland: early ProterozoicboniniticmagmatismContributions to Mineralogy and Petrology, Vol. 97, No. 2, pp. 169-182GreenlandBoninite
DS1993-0616
1993
Hall, R.D.Hall, R.D., Horn, L.L.Rates of hornblende etching in soils in glacial deposits of the northern Rocky Mountains (Wyoming-Montana); United States (US): influence of climate/parentChemical Geology, Vol. 105, pp. 17-29Wyoming, MontanaGeomorphology, Wind River Range, Tobacco Root Range
DS1989-1417
1989
Hall, R.P.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
DS1991-0650
1991
Hall, R.P.Hall, R.P., Hughes, D.J.Early Precambrian basic magmatismChapman and Hall, 472pSouth Africa, Ontario, Wyoming, Minnesota, Wisconsin, Greenland, ScotlandBook -table of contents, Magmatism, Archean, Precambrian, geochemistry
DS1993-0617
1993
Hall, R.P.Hall, R.P., Hughes, .J.Early Precambrian crustal development: changing styles of mafic SOURCE[ Journal of the Geological Society of LondonJournal of the Geological Society of London, Vol. 150, pp. 625-635GlobalArchean-Proterozoic suites, Crust
DS2000-1005
2000
Hall, R.P.Ward, S.E., Hall, R.P., Hughes, D.J.Guruve and Mutare dikes: preliminary geochemical indication of complex Mesoproterozoic mafic magmatic..Journal of African Earth Sciences, Vol. 30, No.3, pp. 689-701.ZimbabweGeochemistry - dikes, Magmatism
DS200412-0788
2004
Hall, R.P.Hanson, R.E., Gose, W.A., Crowley, J.L., Ramezani, J., Bowring, S.A., Bullen, D.S., Hall, R.P., Pancake, J.A.Paleoproterozoic intraplate magmatism and basin development on the Kaapvaal Craton: age, paleomagnetism and geochemistry of 1.93South African Journal of Geology, Vol. 107, 1/2, pp. 233-254.Africa, South AfricaCraton, tectonics, magmatism
DS1993-0618
1993
Hall, S.Hall, S.Mineral production in the former Soviet UnionRaw Materials Data, Vol. 9, No. 1, pp. 16-19Russia, Commonwealth of Independent States (CIS)Economics, Mineral production
DS2003-0534
2003
Hall, T.Hall, T., Wyeth, J.Diamond mining in northern OntarioCanada Forum: Held Nov. 204, Joint Ventures-Joint Rewards. The resource, 180p. binder $ 120.00Ontario, AttawapiskatConference - talk
DS200412-0764
2003
Hall, T.Hall, T., Wyeth, J.Diamond mining in northern Ontario.Canada Forum: Held Nov. 204, Joint Ventures-Joint Rewards. The resource industry and aboriginal development co, 180p. binder $ 120.00Canada, Ontario, Attawapiskat, James Bay LowlandsConference - talk
DS200812-1239
2007
Hall, W.S.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
DS2001-0936
2001
Hall et alPokhilenko, 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
DS1995-0731
1995
Hall. J.Hall. J., Wardle, R.J., et al.Proterozoic orogens of the northwest Canadian shield: new information from Lithoprobe ESCOOT crustal seismics.Canadian Journal of Earth Sciences, Vol. 32, No. 8, Aug. pp. 1119-1131Manitoba, Saskatchewan, SuperiorTectonics, Geophysics -seismics, ESCOOT.
DS1975-0892
1978
Halladay, L.B.Watson, K.D., Bruce, G.S.W., Halladay, L.B.Kimberlitic Dyke in Keith Township, OntarioCanadian Mineralogist., Vol. 16, PP. 97-102.Canada, OntarioPetrography, Genesis, Texture, Microprobe, Analyses, Ilmenite
DS1950-0355
1957
Hallagan, R.W.Shoemaker, E.M., Hensley, F.S.JR, Hallagan, R.W.Diatremes on the Navajo and Hopi Reservation, Arizona. #2United States Geological Survey (USGS) SPECIAL Publishing, No. TEI-690, PP. 389-398.United States, Arizona, Colorado Plateau, Rocky MountainsDiatreme
DS1988-0022
1988
Hallam, A.Audley-Charles, M.G., Hallam, A.Gondawana and TethysOxford University of Press, 328p. $ 98.00GlobalPaleogeography
DS1960-0457
1964
Hallam, C.D.Hallam, C.D.The Geology of the Coastal Diamond Deposits of Southern Africa. In: the Geology of Some Ore Deposits in South Africa.Johannesburg: Geological Society of South Africa, Vol. 2, PP. 671-728.Angola, Southwest Africa, Namibia, Central AfricaKimberley, Geology, Littoral Diamond Placers
DS1989-0085
1989
Hallbauer, D.K.Barton, E.S., Bristow, J., Hallbauer, D.K.Provenance ages for the Witwatersrand supergroup: constrainst from uranium-lead (U-Pb) (U-Pb)ages of detrital zircons in the Orange Grove quartzite and the VentersdorpcontacTectonics Division and Western Transvaal Branch of the Geological Society South, 1p. (abstract.)South AfricaGeochronology, Witwatersrand research
DS201312-0356
2013
Halldorsson, S.A.Hallis, L.J., Huss, G.R., Taylor, D.R., Nagashima, K., Halldorsson, S.A., Hilton, D.R.The D/H ratio of the deep mantle.Goldschmidt 2013, AbstractMantleDeuterium/Hydrogen
DS201512-1924
2015
Halldorsson, S.A.Hallis, L.J., Huss, G.R., Nagashima, K., Taylor, G.J., Halldorsson, S.A.Evidence of primordial water in Earth's deep mantle.Science, Vol. 350, 6252 Nov. 13, pp. 795-797.MantleWater

Abstract: The hydrogen-isotope [deuterium/hydrogen (D/H)] ratio of Earth can be used to constrain the origin of its water. However, the most accessible reservoir, Earth’s oceans, may no longer represent the original (primordial) D/H ratio, owing to changes caused by water cycling between the surface and the interior. Thus, a reservoir completely isolated from surface processes is required to define Earth’s original D/H signature. Here we present data for Baffin Island and Icelandic lavas, which suggest that the deep mantle has a low D/H ratio (dD more negative than -218 per mil). Such strongly negative values indicate the existence of a component within Earth’s interior that inherited its D/H ratio directly from the protosolar nebula.
DS202005-0744
2020
Halldorsson, S.A.Labidi, J., Barry, P.H., Bekaert, D.V., Broadley, M.W., Marty, B., Giunta, T., Warr, O., Sherwood Lollar, B., Fischer, T.P., Avice, G., Caracusi, A., Ballentine, C.J., Halldorsson, S.A., Stefansson, A., Kurz, M.D., Kohl, I.E., Young, E.D.Hydrothermal 15N15N abundances constrain the origins of mantle nitrogen.Nature, Vol. 580, 7803 pp. 367-371. Mantlenitrogen

Abstract: Nitrogen is the main constituent of the Earth’s atmosphere, but its provenance in the Earth’s mantle remains uncertain. The relative contribution of primordial nitrogen inherited during the Earth’s accretion versus that subducted from the Earth’s surface is unclear1,2,3,4,5,6. Here we show that the mantle may have retained remnants of such primordial nitrogen. We use the rare 15N15N isotopologue of N2 as a new tracer of air contamination in volcanic gas effusions. By constraining air contamination in gases from Iceland, Eifel (Germany) and Yellowstone (USA), we derive estimates of mantle d15N (the fractional difference in 15N/14N from air), N2/36Ar and N2/3He. Our results show that negative d15N values observed in gases, previously regarded as indicating a mantle origin for nitrogen7,8,9,10, in fact represent dominantly air-derived N2 that experienced 15N/14N fractionation in hydrothermal systems. Using two-component mixing models to correct for this effect, the 15N15N data allow extrapolations that characterize mantle endmember d15N, N2/36Ar and N2/3He values. We show that the Eifel region has slightly increased d15N and N2/36Ar values relative to estimates for the convective mantle provided by mid-ocean-ridge basalts11, consistent with subducted nitrogen being added to the mantle source. In contrast, we find that whereas the Yellowstone plume has d15N values substantially greater than that of the convective mantle, resembling surface components12,13,14,15, its N2/36Ar and N2/3He ratios are indistinguishable from those of the convective mantle. This observation raises the possibility that the plume hosts a primordial component. We provide a test of the subduction hypothesis with a two-box model, describing the evolution of mantle and surface nitrogen through geological time. We show that the effect of subduction on the deep nitrogen cycle may be less important than has been suggested by previous investigations. We propose instead that high mid-ocean-ridge basalt and plume d15N values may both be dominantly primordial features.
DS1993-0619
1993
Haller, K.M.Haller, K.M.Maps of major active faults, western Hemisphere, ILP project II-2, guidelinesUnited States Geological Survey (USGS) Open File, No. 93-0338, 45p. $ 7.25United States, CanadaStructure, Faults -maps
DS2002-0023
2002
Haller, K.M.Allaoua Saadi, M.N., Machette,K.M., Haller,K.M., Dart, R.L., Bradley, L-A.Map and database of Quaternary faults and lineaments in BrazilU.s. Geological Survey, OF 02-0230 58p $ 76. http://pubs.usgs.gov/of/2002/ofr-BrazilBlank
DS200412-0019
2002
Haller, K.M.Allaoua Saadi, M.N., Machette,K.M., Haller,K.M., Dart, R.L., Bradley, L-A., De Souza, A.M.P.D.Map and database of Quaternary faults and lineaments in Brazil.U.S. Geological Survey, OF 02-0230 58p $ 76.South America, BrazilMap - structure
DS1999-0212
1999
Haller, M.Feraud, G., Alric, V., Haller, M.40 Ar-39 Ar dating of the Jurassic volcanic province of Patagonia:migrating magmatism related to GondwanaEarth and Planetary Science Letters, Vol. 172, No. 1-2, Oct. 15, pp. 83-96.GlobalSubduction, Argon, Magmatism - geochronology
DS1990-0639
1990
Halleran, A.A.D.Halleran, A.A.D., Russell, J.K.Geology and descriptive petrology of the Mount Bisson alkaline complex, Munroe Creek, British ColumbiaBritish Columbia Mineral Resources Division, Paper 1990-1, pp. 297-304British ColumbiaAlkaline complex, Mount Bisson
DS201412-0874
2014
Hallett, B.W.Spear, F.S., Thomas, J.B., Hallett, B.W.Overstepping the garnet isograd: a comparison of QuiG barometry and thermodynamic modeling quartz in garnet isocrhon.Contributions to Mineralogy and Petrology, Vol. 168, pp. 1059 -United States, VermontGarnet ( not specfic to diamond)
DS1990-1096
1990
HallidayNeal, C.R., Taylor, L.A., Davidson, J.P., Holden, P., HallidayEclogites with oceanic crustal and mantle signatures from the BellsbankEarth and Planetary Science Letters, Vol. 99, pp. 362-379South AfricaEclogites, Bellsbank -geochronology
DS1996-0158
1996
HallidayBoundy, T.M., Essene, E.J., Hall, C., Austrheim, HallidayRapid exhumation of lower crust during continent-continent collision and Late extension...Geological Society of America (GSA) Bulletin., Vol. 108, No. 11, Nov. pp. 1425-37.NorwayCaledonian Orogeny, Geochronology
DS1998-1367
1998
HallidaySnyder, 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
DS1999-0691
1999
HallidaySnyder, 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
DS200412-2118
2004
HallidayWilliams, H.M., McCammon, C.A., Peslier, Halliday, Teutsch, Levasseur, BurgIron isotope fractionation and the oxygen fugacity of the mantle.Geochimica et Cosmochimica Acta, 13th Goldschmidt Conference held Copenhagen Denmark, Vol. 68, 11 Supp. July, ABSTRACT p.A563.MantleMelting
DS1986-0562
1986
Halliday, A.Menzies, M., Halliday, A., Palacz, Z., Hunter, R., Hawkesworth, C.Barium and light rare earth element (LREE) enriched mantle below the Archean crust of ScotlandProceedings of the Fourth International Kimberlite Conference, Held, No. 16, pp. 294-295ScotlandBlank
DS1988-0459
1988
Halliday, A.Menzies, M., Halliday, A.Lithospheric mantle domains beneath the Archean and Proterozoic crust ofScotlandJournal of Petrology, Special Volume 1988- Oceanic and Continental, pp. 275-302ScotlandMantle
DS1995-0398
1995
Halliday, A.Dawson, J.B., James, D., Paslick, m C., Halliday, A.Thermal anomay in the upper mantle beneath a propagating continental rift:evdience Labait VolcanoProceedings of the Sixth International Kimberlite Conference Extended Abstracts, p. 124-5.TanzaniaTectonics, magmatism, Carbonatite
DS1995-1444
1995
Halliday, A.Paslick, C., Halliday, A., James, D., Dawson, J.B.Enrichment of the continental lithosphere by Ocean Island Basalt (OIB) melts: isotopic evidence from volcanic province, Tanzania.Earth and Planetary Science Letters, Vol. 130, No. 1-4, Feb. pp. 109-126.TanzaniaGeochronology, Volcanics
DS200412-1569
2004
Halliday, A.Porcelli, D., Pepin, R., Halliday, A., Ballentine, C.Xe, mantle degassing and atmospheric closure.Geochimica et Cosmochimica Acta, 13th Goldschmidt Conference held Copenhagen Denmark, Vol. 68, 11 Supp. July, ABSTRACT p.A553.MantleDegassing
DS1996-1075
1996
Halliday, A.H.Paslick, C.R., Halliday, A.H., Dawson, J.B.Indirect crustal contamination evidence from isotopic and chemical disequilibration temperatures in minerals from .....Contributions to Mineralogy and Petrology, Vol. 125, No. 4, pp. 277-292.TanzaniaAlkali basalts, Nephilinites
DS1996-0344
1996
Halliday, A.M.Dawson, J.B., Halliday, A.M., Paslick, C.Contrasting metasomatic styles in the Tanzanian lithospheric mantleInternational Geological Congress 30th Session Beijing, Abstracts, Vol. 1, p. 122.TanzaniaCarbonatite, Nephelinite
DS1987-0466
1987
Halliday, A.N.Menzies, M.A., Halliday, A.N., Palacz, Z., Hunters, R.H., UptonEvidence from mantle xenoliths for an enriched lithospheric keel under the outer HebridesNature, Vol. 325, January 1, pp. 44-47GlobalMantle xenoliths
DS1988-0285
1988
Halliday, A.N.Halliday, A.N., Dickin, A.P., Fallick, A.E., Fitton, J.G.Mantle dynamics: a neodynium, strontium, lead and oxygen isotopic study Of the Cameroon line volcanicchainJournal of Petrology, Vol. 29, No. 1, pp. 181-211GlobalMantle, Geochronology
DS1989-1008
1989
Halliday, A.N.Menzies, M.A., Halliday, A.N., Hunter, R.H., MacIntyre, R.M., UptonThe age, composition and significance of a xenolith bearing monchiquitedike, Lewis, ScotlandGeological Society of Australia Inc. Blackwell Scientific Publishing, Special, No. 14, Vol. 2, pp. 843-852ScotlandMantle xenoliths
DS1989-1101
1989
Halliday, A.N.Neal, C.R., Taylor, L.A., Davidson, J.P., Halliday, A.N., ClaytonIsotopic signatures of mantle ecologites: the identification of ancient subducted components and later metasomatic eventsEos, Vol. 70, No. 43, October 24, p. 1410. AbstractSouth AfricaBellsbank, Eclogites
DS1990-1451
1990
Halliday, A.N.Taylor, L.A., Neal, C.R., Davidson, J.P., Halliday, A.N., ClaytonEclogite xenoliths in kimberlite products of ancientsubductionprocessesEos, Vol. 71, No. 17, April 24, p. 523 Abstract onlySouth AfricaBellsbank, Roberts Victor, Eclogite xenoliths
DS1991-0651
1991
Halliday, A.N.Halliday, A.N., Ohr, M., Mezger, K., Chesley, J.T., Nakai, S.Recent developments in dating ancient crustal fluid flowReviews of Geophysics, Vol. 29, No. 4, November pp. 577-584MantleModel -fluid flow, Geochronology
DS1991-1145
1991
Halliday, A.N.Mezger, K., Van der Pluijm, B.A., Essene, E.J., Halliday, A.N.Synorogenic collapse: a perspective from the middle crust, the Proterozoic Grenville orogenScience, Vol. 254, November 1, pp. 695-698OntarioTectonics, Grenville orogeny
DS1992-0656
1992
Halliday, A.N.Halliday, A.N., Davies, G.R., Lee, D-C, Tommasini, S., Paslick, C.R.Lead isotope evidence for young trace element enrichment in the oceanic upper mantleNature, Vol. 359, No. 6396, October 15, pp. 623-626MantleGeochronology
DS1992-0657
1992
Halliday, A.N.Halliday, A.N., et al.Cerium, Uranium, Barium, Potassium and lead in earth's mantle: theEos, Transactions, Annual Fall Meeting Abstracts, Vol. 73, No. 43, October 27, abstracts p. 655MantlePerovskite, barium, cerium, uranium, potassium
DS1993-0620
1993
Halliday, A.N.Halliday, A.N., Dickin, A.P., Hunter, R.N., Davies, G.R., DempsterFormation and composition of the lower continental crust: evidence from Scottish xenolith suitesJournal of Geophysical Research, Vol. 98, No. B 1 January 10, pp. 581-608ScotlandXenoliths, Crust
DS1993-1195
1993
Halliday, A.N.Paslick, C.R., Halliday, A.N., Davies, G.R., Mezger, K., Upton, B.G.J.Timing of Proterozoic magmatism in the Gardar Province, southernGreenland.Geological Society of America Bulletin, Vol. 105, No. 2, February pp. 272-278.GreenlandAlkaline rocks, Ilmaussaq Complex
DS1993-1493
1993
Halliday, A.N.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
DS1996-0828
1996
Halliday, A.N.Lee, D.C., Halliday, A.N., Davies, G.R., Essene, FittonMelt enrichment of shallow depleted mantle - detailed petrological trace element and isotopic study...Journal of Petrology, Vol. 37, No. 2, April pp. 415-441.GlobalMantle derived xenoliths, Megacrysts, petrology
DS1999-0591
1999
Halliday, A.N.Renkamper, M., Halliday, A.N., Takazawa, E.Non-chondritic platinum group element ratios in oceanic mantle lithosphere:petrogenetic signature melt...Earth and Planetary Science Letters, Vol. 172, No. 1-2, Oct. 15, pp. 65-82.MantlePlatinum group elements, Melt percolation
DS2000-0017
2000
Halliday, A.N.Amelin, Y., Lee, D.C., Halliday, A.N.Early middle Archean crustal evolution deduced from Lutetium - Hafnium and uranium-lead (U-Pb) isotopic studies.Geochimica et Cosmochimica Acta, Vol. 64, No. 24, Dec. 1, pp. 4205-26.MantleTectonics, Geochronology
DS2001-0436
2001
Halliday, A.N.Halliday, A.N.Earth Science: in the beginningNature, Vol. 409, No. 6817, Jan. 11, p. 144.MantleTectonics
DS2001-0942
2001
Halliday, A.N.Porcelli, D., Halliday, A.N.The core as a possible source of mantle heliumEarth and Planetary Science Letters, Vol. 192, No.1, pp. 45-56.MantleHelium - core, Geochemistry
DS200412-2117
2004
Halliday, A.N.Williams, H.M., McCammon, C.A., Peslier, A.H., Halliday, A.N., Teutsch, N., Levasseur, S., Burg, J-P.Iron isotope fractionation and the oxygen fugacity of the mantle.Science, Vol. 304, 5677, June 11, p. 1656.MantleGeothermobarometry
DS200512-1179
2005
Halliday, A.N.Williams, H.M., Peslier, A.H., McCammon, C., Halliday, A.N., Levasseur, S., Teutsch, N., Burg, J.P.Systematic iron isotope variations in mantle rocks and minerals: the effects of partial melting and oxygen fugacity.Earth and Planetary Science Letters, Advanced in press,MantleMelting
DS200512-1180
2005
Halliday, A.N.Williams, H.M., Peslier, A.H., McCammon, C., Halliday, A.N., Levasseur, S., Teutsch, N., Burg, J.P.Systematic iron isotope variations in mantle rocks and minerals. The effects of partial melting and oxygen fugacity.Earth and Planetary Science Letters, Vol. 235, 1-2, pp. 435-452.MantleGeochronology, melting
DS200612-0523
2006
Halliday, A.N.Halliday, A.N.The origin of the Earth .. What's new?Elements, Vol. 3, no. 4, August pp. 205-210.MantleGeochemistry, core, isotopes
DS201504-0199
2015
Halliday, A.N.Gannoun, A., Burton, K.W., Barfod, D.N., Schiano, P., Vlastelic, I., Halliday, A.N.Resolving mantle and magmatic processes in basalts from the Cameroon volcanic line using the Re-Os isotopic system.Lithos, Vol. 224-5, pp. 1-12.Africa, CameroonAlkaline rocks, basalts
DS201212-0155
2012
Halliday, M.De Sousa, H.A.F., Fedikow, M.A.F., Ryder, J., Turner, N., Halliday, M.Application of weak leaches in kimberlite exploration.10th. International Kimberlite Conference Feb. 6-11, Bangalore India, AbstractCanada, OntarioGeochemistry
DS201312-0356
2013
Hallis, L.J.Hallis, L.J., Huss, G.R., Taylor, D.R., Nagashima, K., Halldorsson, S.A., Hilton, D.R.The D/H ratio of the deep mantle.Goldschmidt 2013, AbstractMantleDeuterium/Hydrogen
DS201512-1924
2015
Hallis, L.J.Hallis, L.J., Huss, G.R., Nagashima, K., Taylor, G.J., Halldorsson, S.A.Evidence of primordial water in Earth's deep mantle.Science, Vol. 350, 6252 Nov. 13, pp. 795-797.MantleWater

Abstract: The hydrogen-isotope [deuterium/hydrogen (D/H)] ratio of Earth can be used to constrain the origin of its water. However, the most accessible reservoir, Earth’s oceans, may no longer represent the original (primordial) D/H ratio, owing to changes caused by water cycling between the surface and the interior. Thus, a reservoir completely isolated from surface processes is required to define Earth’s original D/H signature. Here we present data for Baffin Island and Icelandic lavas, which suggest that the deep mantle has a low D/H ratio (dD more negative than -218 per mil). Such strongly negative values indicate the existence of a component within Earth’s interior that inherited its D/H ratio directly from the protosolar nebula.
DS1991-0652
1991
Halliwell, J.E.Halliwell, J.E.Environment and scienceThe Canadian Mining and Metallurgical Bulletin (CIM Bulletin) , Special Feature on environment, Vol. 84, No. 952, Augustpp. 41-43CanadaEnvironment, Science
DS200712-0343
2007
Hallot, E.Galland, O., Cobbold, P.R., De Bremond d'Ars, J., Hallot, E.Rise and emplacement of magma during horizontal shortening of the brittle crust: insights from experiments.Journal of Geophysical Research, Vol. 112, B6 B06402MantleMagmatism
DS201312-0357
2014
Halls, H.Halls, H.Crustal shortening during the Paleoproterozoic: can it be accommodated by paleomagnetic data?Precambrian Research, Vol. 244, pp. 42-52.CanadaTrans-Hudson orogen, Slave craton
DS1970-0304
1971
Halls, H.C.Halls, H.C., West, G.F.A Seismic Refraction Survey in Lake SuperiorCanadian Journal of Earth Sciences, Vol. 8, PP. 610-630.GlobalMid-continent, Geophysics
DS1970-0521
1972
Halls, H.C.Halls, H.C.Magnetic Studies in Northern Lake SuperiorCanadian Journal of Earth Sciences, Vol. 9, No. 11, PP. 1349-1367.GlobalMid-continent, Geophysics
DS1975-0755
1978
Halls, H.C.Halls, H.C.The Late Precambrian North American Rift System- a Survey Of Recent Geological and Geophysical Investigations.In: Tectonics And Geophysics of Continental Rifts, Neumann, PP. 111-123.GlobalMid-continent
DS1975-1051
1979
Halls, H.C.Halls, H.C.Diatremes and Shock Features on Precambrian Rocks of the Slate Islands, Northeastern Lake Superior: Discussion.Geological Society of America (GSA) Bulletin., Vol. 90, No. 1, PP. 1084-1086.Canada, OntarioBlank
DS1982-0244
1982
Halls, H.C.Halls, H.C.Crustal Thickness in the Lake Superior RegionGeological Society of America (GSA) MEMOIR., No. 156, PP. 239-243.GlobalMid-continent
DS1984-0263
1984
Halls, H.C.Ernst, R.E., Halls, H.C.Structural and Palaeomagnetic Studies of Dikes in the Vicinity of the Kapuskasing Structural Zone, Northern Ontario.Geological Association of Canada (GAC), Vol. 9, P. 52. (abstract.).Canada, OntarioTectonics
DS1984-0264
1984
Halls, H.C.Ernst, R.E., Halls, H.C.Paleomagnetism of the Hearst Dike Swarm and Implications For the Tectonic History of the Kapuskasing Structural Zone, Northern Ontario.Canadian Journal of Earth Sciences, Vol. 21, No. 12, DECEMBER PP. 1499-1506.GlobalTectonics
DS1984-0265
1984
Halls, H.C.Ernst, R.E., Halls, H.C.Paleomagnetism of the Hearst dike swarm and implications for the tectonic history of Kapuskasing Structural Zone, northern Ontario.Canadian Journal of Earth Sciences, Vol. 21, pp. 1499-1506.OntarioTectonics - Structure, Ksz
DS1986-0335
1986
Halls, H.C.Halls, H.C.Paleomagnetism, structure and longitudinal correlation of middle Precambrian dykes from northwestern Ontario and MinnesotaCanadian Journal of Earth Sciences, Vol. 23, No. 2, February pp. 142-157Ontario, Great Lakes, MinnesotaDyke
DS1986-0631
1986
Halls, H.C.Palmer, H.C., Halls, H.C.Paleomagnetism of the Powder Mill group, Michigan and Wisconsin: are assessment of the Logan loopJournal of Geophysical Research, Vol. 91, No. B 11, October 10, pp. 11, 571-11, 580Michigan, WisconsinPaleomagnetism, Geophysics
DS1988-0286
1988
Halls, H.C.Halls, H.C., Shaw, E.G.Paleomagnetism and orientation of Precambrian dykes, eastern Lake Superiorregion, and their use in estimates of crustal tilting.Canadian Journal of Earth Sciences, Vol. 25, pp. 732-43.OntarioTectonics, Paleomagnetic - dike
DS1989-0574
1989
Halls, H.C.Halls, H.C., Bates, M.P., Palmer, H.C.Magnetic-polarity domains, structural domains,petrography andpaleomagnetism; their bearing on The origin and deformation of the early Prot.MatachewanNew Mexico Bureau of Mines Bulletin., Continental Magmatism Abstract Volume, Held, Bulletin. No. 131, p. 119. AbstractOntarioDyke, Geophysics
DS1989-0575
1989
Halls, H.C.Halls, H.C., Bates, W.Regional Hudsonian (?) deformation of the Superiorprovince:paleomagnetic evidence from 2.45 GA Matachewan dykes, OntarioGeological Association of Canada (GAC) Annual Meeting Program Abstracts, Vol. 14, p. A104. (abstract.)OntarioTectonics, Kapuskasing Lithoprobe
DS1989-0576
1989
Halls, H.C.Halls, H.C., Palmer, H.C.Magnetic polarity domains in the Matachewan dyke swarm and their relationship to the Kapuskasing structuralzoneGeological Association of Canada (GAC) Annual Meeting Program Abstracts, Vol. 14, p. A103. (abstract.)OntarioTectonics, Kapuskasing Lithoprobe
DS1990-0177
1990
Halls, H.C.Bates, M.P., Halls, H.C.Regional variation in paleomagnetic polarity of the Matachewan dyke swarm related to the Kapuskasing structural Zone, OntarioCanadian Journal of Earth Sciences, Vol. 27, No. 2, February pp. 200-211OntarioTectonics, Kapuskasing Structural Zo
DS1990-0640
1990
Halls, H.C.Halls, H.C., Bates, M.P.The evolution of the 2.45 Ga Matachewan dyke swarm, CanadaMafic dykes and emplacement mechanisms, Editors A.J. Parker, P.C., pp. 237-250OntarioDykes, Evolution
DS1990-0641
1990
Halls, H.C.Halls, H.C., Palmer, H.C.The tectonic relationship of two Early Proterozoic dyke swarms to the Kapuskasing Structural Zone: a paleomagnetic and petrographic studyCanadian Journal of Earth Sciences, Vol. 27, No. 1, January pp. 87-103OntarioTectonics, Kapuskasing Structural Zo
DS1991-0080
1991
Halls, H.C.Bates, M.P., Halls, H.C.Paleomagnetism of dykes from the Groundhog River Block, northern Ontario:implications for the uplift history of the Kapuskasing Structural ZoneCanadian Journal of Earth Sciences, Vol. 28, No. 9, September pp. 1424-1428OntarioGeophysics -paleomagnetics, Kapuskasing Structural Zone
DS1991-0081
1991
Halls, H.C.Bates, M.P., Halls, H.C.Broad scale Proterozoic deformation of the central Superior Province by paleomagnetism of the 2.45 Ga dykeCanadian Journal of Earth Sciences, Vol. 28, No. 11, November pp. 1780-1796OntarioPaleomagnetism, Dike swarm
DS1991-0082
1991
Halls, H.C.Bates, M.P., Halls, H.C.Broad scale Proterozoic deformation of the central Superior Province revealed by paleomagnetism of the 2.45 Ga Matachewan dyke swarmCanadian Journal of Earth Sciences, Vol. 28, pp. 1780-96.OntarioTrans Hudson Orogeny, Geophysics - paleomagnetics
DS1991-0653
1991
Halls, H.C.Halls, H.C.The Matachewan dyke swarm: outward growth from a focal centre?Geological Association of Canada (GAC)/Mineralogical Association of Canada/Society Economic, Vol. 16, Abstract program p. A50OntarioDykes, Tectonics
DS1991-0654
1991
Halls, H.C.Halls, H.C.The Matachewan dyke swarm, Canada: an early Proterozoic magnetic fieldreversalEarth and Planetary Science Letters, Vol. 105, pp. 279-292OntarioGeophysics -magnetics, Dyke swarm
DS1991-1847
1991
Halls, H.C.West, G.F., Halls, H.C.Aeromagnetic survey of the Ivan hoe Lake Fault zone Lithoprobe KSZtransectGeological Association of Canada (GAC)/Mineralogical Association of Canada/Society Economic, Vol. 16, Abstract program p. A131OntarioGeophsyics -aeromagnetics, Tectonics -Kapuskasing structural zone
DS1992-0991
1992
Halls, H.C.Manson, M.L., Halls, H.C.The geometry and sense of post-Keweenawan faults in eastern Lake Superior:implications for models of rift developmentEos Transactions, Vol. 73, No. 14, April 7, supplement abstracts p. 320OntarioMidcontinent Rift, Structure -faults
DS1992-1433
1992
Halls, H.C.Smith, P.E., Farquhar, R.M., Halls, H.C.U-Th-Ph isotope study of mafic dykes in the Superior province Ontario:uniformity of initial lead isotope ratios of the Hearst dykesChemical Geology, Vol. 94, No. 4, May 15, pp. 261-280OntarioGeochronology, Hearst dikes
DS1992-1735
1992
Halls, H.C.Zhai, Y.J., Halls, H.C.Paleomagnetism of the Molson Dykes and Pikwitonei granulites, NorthernManitobaEos Transactions, Vol. 73, No. 14, April 7, supplement abstracts p. 92ManitobaPaleomagnetics, Dykes
DS1992-1736
1992
Halls, H.C.Zhang, B., Halls, H.C.Does another thrust sheet lie above the Kapuskasing Zone?Eos Transactions, Vol. 73, No. 14, April 7, supplement abstracts p. 92OntarioTectonics, Kapuskasing Zone
DS1994-0702
1994
Halls, H.C.Halls, H.C., Palmer, H.C., et al.Constraints on the nature of the Kapuskasing structural zone from the studyof Proterozoic dyke swarms.Canadian Journal of Earth Sciences, Vol. 31, No. 7, July pp. 1182-1196.OntarioStructure, Tectonics -Kapuskasing uplift
DS1994-1098
1994
Halls, H.C.Manson, M.L., Halls, H.C.Post Keweenwan compressional faults in eastern Lake Superior region and their tectonic significance.Canadian Journal of Earth Sciences, Vol. 31, No. 4, April pp. 640-651.Ontario, MichiganGeophysics -seismics, Tectonics -Midcontinent rift
DS1994-1970
1994
Halls, H.C.Yonggian Zhai, Halls, H.C.Multiple episodes of dike emplacement along the northwestern margin of the Superior Province.Journal of Geophysical Research, Vol. 99, No. B11, Nov. 10, pp. 21, 717-732.ManitobaDikes, Molson swarm
DS1995-0732
1995
Halls, H.C.Halls, H.C.Variations in paleomagnetic direction and feldspar clouding intensity across Matachewan dyke swarm....Can. Min. Northern Margin S. Canadian shield, Vol. 33, p.935.OntarioGrenville Province, Matachewan dykes
DS1996-0185
1996
Halls, H.C.Buchan, K.L., Halls, H.C., Mortensen, J.K.Paleomagnetism uranium-lead (U-Pb) (U-Pb) geochronology, geochemistry of Marathon dykes, SuperiorProvince... Fort Frances swarmCanadian Journal of Earth Sciences, Vol. 33, No. 12, Dec. pp. 1583-95.OntarioDike swarm, Marathon, Frances
DS1997-0728
1997
Halls, H.C.Manson, M.L., Halls, H.C.Proterozoic reactivation of southern Superior Province and its role in the evolution of Midcontinent Rift.Canadian Journal of Earth Sciences, Vol. 34, No. 4, April, pp. 562-575.Michigan, WisconsinRifting, tectonics, Kapuskasing structural zone
DS1998-0563
1998
Halls, H.C.Halls, H.C., Mound, J.The McEwan Lake fault: gravity evidence for a new structural element of the Kapuskasing zone.Canadian Journal of Earth Sciences, Vol. 35, No. 6, June pp. 696-701.OntarioGeophysics - gravity, Kapuskasing Zone
DS1998-0564
1998
Halls, H.C.Halls, H.C., Zhang, B.Uplift structure of the southern Kapuskasing zone from 2.45 Ga dike swarmdisplacement.Geology, Vol. 26, No. 1, Jan. pp. 67-70.OntarioDike swarm, Kapuskasing tectonic zone
DS1999-0485
1999
Halls, H.C.Mitescu, B., Halls, H.C., Gubala, C.P.A gravity study of the northwestern boundary fault of the Kapuskasing structural Zone.Geological Association of Canada (GAC) Geological Association of Canada (GAC)/Mineralogical Association of Canada (MAC)., Vol. 24, p. 92. abstractOntarioTectonics, structure, Ivanhoe Fault, Midcontinent
DS1999-0599
1999
Halls, H.C.Riller, U., Schwerdtner, W.M., Halls, H.C., Card, K.D.Transpressive tectonism in the eastern Penokean orogen: consequences for Proterozoic crustal kinematics...Precambrian Research, Vol. 93, No. 1, Jan. pp. 27-50.GlobalTectonics - plate, Penokean Orogen
DS2000-0380
2000
Halls, H.C.Halls, H.C., Heaman, L.M.The paleomagnetic significance of new uranium-lead (U-Pb) age dat a from the Molson dike swarm, Causchon Lake area.Canadian Journal of Earth Sciences, Vol. 37, No. 6, June pp. 957-66.ManitobaGeochronology, Molson dyke swarm
DS2001-0437
2001
Halls, H.C.Halls, H.C., Campal, Davis, BossiMagnetic studies and uranium-lead (U-Pb) geochronology of the Uruguyuan dyke swarm, Rio de la Plat a Craton: paleomagJournal of South American Earth Sciences, Vol. 14, No. 4, Sept. pp. 349-61.UruguayGeophysics - magnetics, Dike swarms
DS2001-0918
2001
Halls, H.C.Phinney, W.C., Halls, H.C.Petrogenesis of the Early Proterozoic Matachewan dike swarm: implications for magma emplacement and deform.Canadian Journal of Earth Science, Vol. 38, No. 11, Nov. pp. 1541-63.OntarioMagmatism, Dyke Swarm - Matachewan
DS2002-1142
2002
Halls, H.C.Nitescu, B., Halls, H.C.A gravity profile across southern Saganash lake fault: implications for the origin of Kapuskasing structuralCanadian Journal of Earth Science, Vol.39,4,Apr.pp.469-80., Vol.39,4,Apr.pp.469-80.OntarioGeophysics - gravity, Tectonics - Kapuskasing Structural Zone
DS2002-1143
2002
Halls, H.C.Nitescu, B., Halls, H.C.A gravity profile across southern Saganash lake fault: implications for the origin of Kapuskasing structuralCanadian Journal of Earth Science, Vol.39,4,Apr.pp.469-80., Vol.39,4,Apr.pp.469-80.OntarioGeophysics - gravity, Tectonics - Kapuskasing Structural Zone
DS2003-0535
2003
Halls, H.C.Halls, H.C., Stott, G.M.Paleomagnetic Studies of Mafic Dikes in the Vicinity of Lake Nipigon, NorthwesternOntario Geological Survey, Summary of Field Work and Other Activities Article 11northwestern OntarioBlank
DS2003-0536
2003
Halls, H.C.Halls, H.C., Stott, G.M.Paleomagnetic studies of mafic dikes in the vicinity of Lake Nipigon northwesternOntario Geological Survey Open File, No. 6120, pp. 11 1-7.OntarioDike - Matachewan
DS2003-0537
2003
Halls, H.C.Halls, H.C., Zhang, B.Crustal uplift in the southern Superior Province, Canada revealed by paleomagnetismTectonophysics, Vol. 362, 1-4, pp. 123-46.Ontario, ManitobaTectonics
DS200412-0766
2004
Halls, H.C.Halls, H.C., Davis, D.W.Paleomagnetism and U Pb geochronology of the 2.17 Ga Bicotasing dyke swarm, Ontario, Canada: evidence for vertical axis crustalCanadian Journal of Earth Sciences, Vol. 41, 3, pp. 255-269.Canada, OntarioGeochronology, Matachewan dyke swarm
DS200412-0767
2004
Halls, H.C.Halls, H.C., McArdle, N.J., Gratton, M.N., Hill, M.J., Shaw, J.Microwave paleointensities from dyke chilled margins: a way to obtain long term variations in geodynamo intensity for the last tPhysics of the Earth and Planetary Science Interiors, Vol. 147, 2-3, Nov. 15, pp.183-195.Canada, OntarioMattachewan dyke swarm, geochronology, Biscotasing, Mar
DS200412-0768
2003
Halls, H.C.Halls, H.C., Stott, G.M.Paleomagnetic studies of mafic dikes in the vicinity of Lake Nipigon northwestern Ontario.Ontario Geological Survey Open File, No. 6120, pp. 11 1-7.Canada, OntarioDike - Matachewan
DS200512-0232
2005
Halls, H.C.Denyszyn, S.W., Halls, H.C., Davis, D.W.Paleomagnetic geochemical and U Pb geochronological study of Proterozoic dykes in Greenland and Arctic Canada and their role in plate tectonic reconstruction.GAC Annual Meeting Halifax May 15-19, Abstract 1p.Europe, GreenlandTectonics
DS200512-0393
2005
Halls, H.C.Halls, H.C., Davis, D.W., Stott, G.M.Paleomagnetism and U Pb dating of Proterozoic dykes: a new radiation swarm and an increase in post Archean crustal rotation westwards from the Kapuskasing zone.GAC Annual Meeting Halifax May 15-19, Abstract 1p.Canada, Ontario, Attawapiskat, James Bay LowlandsGeochronology, Kapuskasing
DS200512-0394
2005
Halls, H.C.Halls, H.C., Stott, G.M., Davis, D.W.Paleomagnetism, geochronology and geochemistry of several Proterozoic mafic dike swarms in northwestern Ontario.Ontario Geological Survey, Open file 6171, 59p. $ 9.00Canada, OntarioDike swarms
DS200812-0443
2008
Halls, H.C.Halls, H.C., Davis, D.W., Stott, G.M., Ernst, R.E., Hamilton, M.A.The Paleoproterozoic Marathon large igneous province: new evidence for a 2.1 Ga long lived mantle plume event along the southern margin of the N.A. Superior ProvincePrecambrian Research, Vol. 162, 3-4, pp. 327-353.Canada, OntarioMantle plume
DS201012-0261
2010
Halls, H.C.Halls, H.C.The Reguibat shield, Mauritania: a dyke swarm bonanza?International Dyke Conference Held Feb. 6, India, 1p. AbstractAfrica, Mauritania, MoroccoDyke morphology
DS201012-0262
2010
Halls, H.C.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
DS1950-0135
1953
Hallsberg Guldsmedsaktiebolag, C.G.Hallsberg Guldsmedsaktiebolag, C.G.Adla Stenar. Nagra Ord Om Adelstenen Som Smyckesten UitginenStockholm., 51P.GlobalKimberley
DS1999-0281
1999
Hallsworth, C.R.Hallsworth, C.R., Knox, R.W. O'b.Classification of sediments and sedimentary rocksBritish Geological Survey, No. 99-03, 45p.p.GlobalClassification - sedimentary rocks
DS200412-0769
1999
Hallsworth, C.R.Hallsworth, C.R., Knox, R.W.O'b.Classification of sediments and sedimentary rocks.British Geological Survey, No. 99-03, 45p.p.TechnologyClassification - sedimentary rocks
DS1993-1518
1993
HallworthSparks, R.S., Huppert, Koyaguchi, HallworthOrigin of modal and rhthmic igneous layering by sedimentation in aconvecting magma chamber.Nature, Vol. 361, Jan. 21, pp. 246-8.GlobalMagmatism - convection
DS1992-0104
1992
Hallworth, M.A.Bedard, J.H., Kerr, R.C., Hallworth, M.A.Porous sidewall and sloping flow crystallization experiments using a relative mush: implications for the self-channelization of residual melts incumulatesEarth and Planetary Science Letters, Vol. 111, No. 2/4, July pp. 319-330GlobalCrust, Layering, differentiation, cumulates
DS1993-0621
1993
Hallworth, M.A.Hallworth, M.A., Phillips, J.C., Huppert, H.E., Sparks, R.S.J.Entrainment in turbulent gravity currentsNature, Vol. 362, No. 6423, April 29, pp. 829-830GlobalSedimentation
DS1988-0221
1988
Halpenny, J.Forsyth, D.A., Thomas, M.D., Broome, J., Abbinett, D., Halpenny, J.Regional geophysics of the central metasedimentary beltGeological Society of America (GSA) Abstract Volume, Vol. 20, No. 5, March p. 344. abstractGlobalBlank
DS1989-1217
1989
Halpenny, J.F.Pilkington, M., Grieve, R.A.F., Gibb, R.A., Halpenny, J.F.Derived potential field dat a sets for North AmericaGeological Society of Canada (GSC) Forum 1989, P. 20 abstractGlobalMidcontinent, Geophysics
DS1989-1418
1989
Halpenny, J.F.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
DS201012-0263
2010
Halpin, K.Halpin, K., Ansdell, K., Pearson, J.The characteristics and origin of Great Western Minerals Group Ltd.'s Hoidas Lake REE deposit, Rae province, Northwestern Saskatchewan.International Workshop Geology of Rare Metals, held Nov9-10, Victoria BC, Open file 2010-10, extended abstract pp.45.Canada, SaskatchewanAlkalic
DS200812-0438
2008
Halter, W.Guzmics, T., Zajacz, Z., Kodoenyi, J., Halter, W., Szabo, C.LA ICP MS study of apatite and K feldspar hosted primary carbonatite melt inclusions in clinopyroxenite xenoliths from lamprophyres, Hungary: implicationsGeochimica et Cosmochimica Acta, Vol. 72, 7, pp. 1864-1886.Mantle, Europe, HungaryCarbonatite, melts
DS2002-0639
2002
Halter, W.E.Halter, W.E., Pettke, T., Heinrich, RothenRutishauserMajor to trace element analysis of melt inclusions by laser ablation ICP MS methods of quantification.Chemical Geology, Vol.183, 1-4, pp.63-86.MantleMelt, Geochemistry - techniques, Inductively Coupled Plasma- Mass
DS201812-2823
2018
Halton, A.Jerram, D.A., Sharp, T.H., Torsvik, T.H., Poulson, R., Watton, T.H., Freitag, U., Halton, A., Sherlock, S.C., Malley, J.A.S., Finley, A., Roberge, J., Swart, R., Fabregas, P., Ferreira, C.H., Machado, V.Volcanic constraints on the unzipping of Africa from South America: insights from new geochronological controls alone the Angola margin.Tectonophysics, doi.org/10.1016/ j.tecto.2018.07.027 33p.Africa, Angola, South Americageochronology

Abstract: The breakup of Africa from South America is associated with the emplacement of the Paraná-Etendeka flood basalt province from around 134 Ma and the Tristan da Cunha plume. Yet many additional volcanic events occur that are younger than the main pulse of the Paraná-Etendeka and straddle the rift to drift phases of the main breakup. This contribution reports on new geochronological constraints from the Angolan part of the African Margin. Three coastal and one inland section have been sampled stretching across some 400 Km, with 39Ar/40Ar, U-Pb and Palaeontology used to provide age constraints. Ages from the new data range from ~100 to 81 Ma, with three main events (cr. 100, 91 and 82-81 Ma). Volcanic events are occurring within the Early to Late Cretaceous, along this part of the margin with a general younging towards Namibia. With the constraints of additional age information both onshore and offshore Angola, a clear younging trend at the early stages of rift to drift is recorded in the volcanic events that unzip from North to South. Similar age volcanic events are reported from the Brazilian side of the conjugate margin, and highlight the need to fully incorporate these relatively low volume volcanic pulses into the plate tectonic breakup models of the South Atlantic Margin.
DS1920-0444
1929
Halton, W.L.Halton, W.L.Magnet Cove Arkansaw and VicinityAmerican MINERALOGIST., Vol. 14, No. 12, PP. 484-487.United States, Gulf Coast, Arkansas, Hot Spring CountyMineralogy
DS201606-1076
2016
Haluzova, E.Ackerman, L., Bizimis, M., Haluzova, E., Slama, J., Svojtka, M.Re-Os and Lu-Hf isotopic constraints on the formation and age of mantle pyroxenites from the Bohemian Massif.Lithos, Vol. 256-257, pp. 197-210.Europe, Czech Republic, AustriaPyroxenite

Abstract: We report on the Lu-Hf and Re-Os isotope systematics of a well-characterized suite of spinel and garnet pyroxenites from the Gföhl Unit of the Bohemian Massif (Czech Republic, Austria). Lu-Hf mineral isochrons of three pyroxenites yield undistinguishable values in the range of 336-338 Ma. Similarly, the slope of Re-Os regression for most samples yields an age of 327 ± 31 Ma. These values overlap previously reported Sm-Nd ages on pyroxenites, eclogites and associated peridotites from the Gföhl Unit, suggesting contemporaneous evolution of all these HT-HP rocks. The whole-rock Hf isotopic compositions are highly variable with initial eHf values ranging from - 6.4 to + 66. Most samples show a negative correlation between bulk rock Sm/Hf and eHf and, when taking into account other characteristics (e.g., high 87Sr/86Sr), this may be explained by the presence of recycled oceanic sediments in the source of the pyroxenite parental melts. A pyroxenite from Horní Kounice has decoupled Hf-Nd systematics with highly radiogenic initial eHf of + 66 for a given eNd of + 7.8. This decoupling is consistent with the presence of a melt derived from a depleted mantle component with high Lu/Hf. Finally, one sample from Becváry plots close to the MORB field in Hf-Nd isotope space consistent with its previously proposed origin as metamorphosed oceanic gabbro. Some of the websterites and thin-layered pyroxenites have variable, but high Os concentrations paralleled by low initial ?Os. This reflects the interaction of the parental pyroxenitic melts with a depleted peridotite wall rock. In turn, the radiogenic Os isotope compositions observed in most pyroxenite samples is best explained by mixing between unradiogenic Os derived from peridotites and a low-Os sedimentary precursor with highly radiogenic 187Os/188Os. Steep increase of 187Os/188Os at nearly uniform 187Re/188Os found in a few pyroxenites may be connected with the absence of primary sulfides, but the presence of minor late stage sulfide-bearing veinlets likely associated with HT-HP metamorphism at crustal conditions.
DS201710-2209
2017
Haluzova, E.Ackerman, L., Slama, J., Haluzova, E., Magna, T., Rapprich, V., Kochergin, Y., Upadhyay, D.Hafnium isotope systematics of carbonatites and alkaline silicate rocks from south and west India.Goldschmidt Conference, 1p. AbstractIndiadeposit - Amba Dongar
DS1960-0836
1967
Halverson, B.Halverson, B.Diamonds for Free - MaybeEnterprise Records, Chico, California., SEPTEMBER 2.United States, California, West CoastKimberlite
DS1998-0628
1998
Halverson, G.P.Hoffman, P.F., Kaufman, A.J., Halverson, G.P.Comings and goings of global glaciations on a Neoproterozoic tropical platform in Namibia.Gsa Today, Vol. 8, No. 5, May pp. 1-9.NamibiaGeomorphology, Glacial deposits.... not specific to diamonds
DS201201-0848
2011
Halverson, G.P.Hoffman, P., Macdonald, F.A., Halverson, G.P.Chemical sediments association with Neoproterozoic glaciation: iron formation cap carbonate, barite and phosphorite.The Geological Record of Neoproterozoic glaciations, Memoirs 2011; Vol. 36, pp. 67-80GlobalGeomorphology - geochemistry
DS201201-0849
2011
Halverson, G.P.Hoffman, P.F., Halverson, G.P.Neoproterozoic glacial record in the Mackenzie Mountains, northern Canadian Cordillera.The Geological Record of Neoproterozoic glaciations, Memoirs 2011; Vol. 36, pp. 397-412.CanadaGeomorphology
DS201312-0538
2013
Halverson, G.P.Li, Z-X., Evans, D.AD., Halverson, G.P.Neoproterozoic glaciations in a revised global paleogeography from the breakup of Rodinia to the assembly of Gondwanaland.Sedimentary Geology, Vol. 294, pp. 219-232.Gondwana, RodiniaReview
DS1989-0749
1989
Halvorson, D.Karner, F.R., Halvorson, D., Jenner, G.A., White, S.F.Devils Tower-Black Hills alkalic igneous rock sand general geology. July1-7thAmerican Geophysical Union (AGU) 28th. International Geological Congress Field Trip Guidebook, No. T131, 88pWyomingBear Lodge Mountains, Alkaline rocks
DS1991-0721
1991
Halways, L.E.Hodgins, B.L., Halways, L.E.Rotary blasthole drills: future trendsSkillings Mining Review, Vol. 80, No. 15, April 13, pp. 4-7GlobalDrilling, Rotary blastholes -open pit Mines
DS1983-0418
1983
Ham, E.A.Luza, K.V., Ham, E.A., Sanders, P.R.Indexes to Surface and Subsurface Geologic Mapping in Oklahoma 1977-1979.Oklahoma Geological Survey Map, No. GM 26, S HEETS.OklahomaMid Continent
DS2001-0438
2001
Ham, N.M.Ham, N.M.Welcome to the DIAND Nunavut mineral resources section... brief outline29th. Yellowknife Geoscience Forum, Nov. 21-23, abstract p. 24-5.Northwest Territories, NunavutBlank
DS1960-0837
1967
Ham, W.E.Ham, W.E., Wilson, J.L.Paleozoic Epeirogeny and Orogeny in the Central United StateAmerican Journal of SCIENCE., Vol. 265, PP. 332-407.GlobalMid-continent
DS1998-0565
1998
Hama, J.Hama, J., Suito, K.Equation of state of MgSiO3 perovskite and its thermoelastic properties under lower mantle conditions.Journal of Geophysical Research, Vol. 103, No. 4, Apr. 10, pp. 7443-62.MantlePerovskite
DS2001-0439
2001
Hama, J.Hama, J., Suito, K.Thermoelastic models of minerals and the composition of the Earth's lower mantle.Physical Earth and Planetary Interiors, Vol. 125, No. 1-4, pp. 147-66.MantleMineralogy
DS200812-0785
2008
Hamada, C.Nakakuki, T., Hamada, C., Tagawa, M.Generation and driving forces of plate like motion and asymmetric subduction in dynamical models of an integrated mantle lithosphere system.Physics of the Earth and Planetary Interiors, Vol. 166, 3-4, pp. 128-146.MantleSubduction
DS1992-1515
1992
Hamaguchi, H.Tanaka, S., Hamaguchi, H.Heterogeneity in the lower mantle beneath Africa, as revealed from S and ScS phasesTectonophysics, Vol. 209, pp. 213-222Southern AfricaMantle, Geophysics-gravity
DS1975-0095
1975
Haman, P.J.Haman, P.J.A Lineament Analysis of the United StatesWest Can. Publishing Co., SER. 4, No. 1, 27P.GlobalMid-continent
DS1975-0287
1976
Haman, P.J.Haman, P.J.Angular and Spatial Relationships of Land sat Lineaments of The United States.Proceedings SECOND International CONFERENCE ON BASEMENT TECTONICS, No. 2, PP. 353- 360.GlobalMid-continent
DS200612-1263
2006
Hamane, D.Seto, Y., Hamane, D., Nagai, T., Fujino, K.The fate of carbonates with subducted slabs into the lower mantle and a possible formation of diamonds.International Mineralogical Association 19th. General Meeting, held Kobe, Japan July 23-28 2006, Abstract p. 130.MantleDiamond genesis, subduction
DS200712-1061
2006
Hamane, D.Takafuji, N., Fujino, K., Nagai, T., Seto, Y., Hamane, D.Decarbonation reaction of magnesite in subduction slabs at the lower mantle.Physics and Chemistry of Minerals, Vol. 33, 10, pp. 651-654.MantleSubduction
DS200712-1062
2006
Hamane, D.Takafuji, N., Fujino, K., Nagai, T., Seto, Y., Hamane, D.Decarbonation reaction of magnesite in subducting slabs at the lower mantle.Physics and Chemistry of Minerals, Vol. 33, 10, pp. 651-654.MantleSubduction
DS200812-1042
2008
Hamane, D.Seto, Y., Hamane, D., Nagai, T., Fujino, K.Fate of carbonates within oceanic plates subducted to the lower mantle, and a possible mechanism of diamond formation.Physics and Chemistry of Minerals, Vol. 35, 4, pp. 223-229.MantleUHP, Diamond genesis
DS2001-1137
2001
Hamano, Y.Sumita, I., Hatakeyama, T., Yoshihara, A., Hamano, Y.Paleomagnetism of late Archean rocks of Hamersley basin, western Australia and the paleointensity...Physics of the Earth and Planetary Interiors, Vol. 128, No. 1-4, Dec. 10, pp. 223-41.AustraliaPaleomagnetism, Early Proterozoic
DS200412-1462
2004
Hamaya, N.Okada, T., Utsumi, W., Kaneko, H., Turkevich, V., Hamaya, N., Shimomura, O.Kinetics of the graphite diamond transformation in aqueous fluid determined by in situ X ray diffractions at high pressures andPhysics and Chemistry of Minerals, Vol. 31, 4, pp. 261-268.TechnologyUHP
DS200912-0752
2009
Hamayun, K.Tenzer, R., Hamayun, K., Vajda, P.Global maps of the CRUST 2.0 crustal components stripped gravity disturbances.Journal of Geophysical Research, Vol. 114, B05408.MantleGeophysics - discontinuity
DS201502-0118
2015
Hamayun, M.van der Meijde, M., Fadel, I., Ditmar, P., Hamayun, M.Uncertainties in crustal thickness models for dat a sparse environments: a review for South America and Africa.Journal of Geodynamics, Vol. 84, 1, pp. 1-18.South America, AfricaGeophysics - seismics
DS2003-0932
2003
hamberlain, C.P.Meibom, A., Anderson, D.L., Sleep, N.H., Frei, R., hamberlain, C.P., Hren, M.T.Are high 3He 4He ratios in oceanic basalts an indicator of deep mantle plumeEarth and Planetary Science Letters, Vol. 208, 3-4, March 30, pp.197-204.MantleGeochronology
DS200412-1292
2003
hamberlain, C.P.Meibom, A., Anderson, D.L., Sleep, N.H., Frei, R., hamberlain, C.P., Hren, M.T., Wooden, J.L.Are high 3He 4He ratios in oceanic basalts an indicator of deep mantle plume components?Earth and Planetary Science Letters, Vol. 208, 3-4, March 30, pp.197-204.MantleGeochronology
DS200812-0465
2008
Hambidge, G.Herbst, J., Potapov, A., Hambidge, G., Rademan, J.Modeling of diamond liberation and damage for Debswana kimberlitic ores.Minerals Engineering, Vol. 21, 11, October pp. 766-789.Africa, BotswanaMining - mineral processing
DS1950-0213
1955
Hambleton, W.W.Hambleton, W.W.Magnetic Anomalies in Wilson and Woodson Counties, KansasKansas Geological Survey Bulletin, No. 114, PT. 3, PP. 114-128.United States, Kansas, Central StatesKimberlite, Geophysics
DS2001-1125
2001
HamblinStasiuk, L.D., Sweet, A.R., Hamblin, Issler, Dyck, KiviUpdate on multidisciplinary study of sedimentary cover sequence Lac de Gras kimberlite field.29th. Yellowknife Geoscience Forum, Nov. 21-23, abstract p. 81.Northwest TerritoriesPetrology - geochemistry, Lac de Gras field
DS2001-1145
2001
HamblinSweet, A.R., Stasiuk, McIntyre, Dolby, Hamblin, KiviStratigraphy of the eroded sedimentary cover recorded by xenoliths and crater fill sediments associated....29th. Yellowknife Geoscience Forum, Nov. 21-23, abstract p. 86-7.Northwest TerritoriesStratigraphy, Lac de Gras field
DS2003-0538
2003
Hamblin, A.P.Hamblin, A.P., Stasiuk, L.D., Sweet, L.D., Lockhart, G., Dyck, D.R., Jagger, K.Post kimberlite Eocene strat a in Crater Basin, Lac de Gras, Northwest Territories8ikc, Www.venuewest.com/8ikc/program.htm, Session 1 POSTER abstractNorthwest TerritoriesKimberlite geology and economics, Stratigraphy
DS1860-0752
1892
Hambly, W.Hambly, W.The Discovery of Diamond Mining in South AfricaMining Association And Institute of Cornwall Transactions, Vol. 3, PP. 74-76.Africa, South AfricaHistory
DS200612-0251
2006
Hambrey, M.J.Christofferesen, P., Hambrey, M.J.Is the Greenland ice sheet in a state of collapse.Geology Today, Vol. 22, 3, pp. 98-103.Europe, GreenlandGeomorphology
DS1998-0945
1998
Hamburger, M.Marshak, S., Hamburger, M., Van der Pluijm, B.Tectonics of continental interiors..... Penrose Conference ReportGsa Today, Vol. 8, No. 2, Feb. pp. 23-24GlobalTectonics, Precambrian
DS1998-0946
1998
Hamburger, M.Marshak, S., Hamburger, M., Van der Pluijm, B.A.Tectonics of continental interiors. Penrose Conference reportGsa Today, Vol. 8, No. 2, Feb. pp. 23-24.GlobalContinental interior, Precambrian, Craton
DS201706-1095
2017
Hamburger, M.Marshak, S., Domrois, S., Abert, C., Larson, T., Pavlis, G., Hamburger, M., Yang, X., Gilbert, H., Chen, C.The basement revealed: tectonic insight from a digital elevation model of the Great Unconformity, USA cratonic platform.Geology, Vol. 45, 5, pp. 391-394.United Statestectonics - Mid continent

Abstract: Across much of North America, the contact between Precambrian basement and Paleozoic strata is the Great Unconformity, a surface that represents a >0.4 b.y.-long hiatus. A digital elevation model (DEM) of this surface visually highlights regional-scale variability in the character of basement topography across the United States cratonic platform. Specifically, it delineates Phanerozoic tectonic domains, each characterized by a distinct structural wavelength (horizontal distance between adjacent highs) and/or structural amplitude (vertical distance between adjacent lows and highs). The largest domain, the Midcontinent domain, includes long-wavelength epeirogenic basins and domes, as well as fault-controlled steps. The pronounced change in land-surface elevation at the Rocky Mountain Front coincides with the western edge of the Midcontinent domain on the basement DEM. In the Rocky Mountain and Colorado Plateau domains, west of the Rocky Mountain Front, structural wavelength is significantly shorter and structural amplitude significantly higher than in the Midcontinent domain. The Bordering Basins domain outlines the southern and eastern edges of the Midcontinent domain. As emphasized by the basement DEM, several kilometers of structural relief occur across the boundary between these two domains, even though this boundary does not stand out on ground-surface topography. A plot of epicenters on the basement DEM supports models associating intraplate seismicity with the Midcontinent domain edge. Notably, certain changes in crustal thickness also coincide with distinct changes in basement depth.
DS201712-2679
2018
Hamburger, M.W.Chen, C., Hersh, G., Fischer, K.M., Andronicos, C.L., Pavlis, G.L., Hamburger, M.W., Marshak, S., Larson, T., Yang, X.Lithospheric discontinuities beneath the U.S. Midcontinent - signatures of Proterozoic terrane accretion and failed rifting.Earth and Planetary Science Letters, Vol. 481, pp. 223-235.United States, Illinois, Indiana, Kentuckygeophysics - seismics Reelfoot Rift

Abstract: Seismic discontinuities between the Moho and the inferred lithosphere-asthenosphere boundary (LAB) are known as mid-lithospheric discontinuities (MLDs) and have been ascribed to a variety of phenomena that are critical to understanding lithospheric growth and evolution. In this study, we used S-to-P converted waves recorded by the USArray Transportable Array and the OIINK (Ozarks-Illinois-Indiana-Kentucky) Flexible Array to investigate lithospheric structure beneath the central U.S. This region, a portion of North America's cratonic platform, provides an opportunity to explore how terrane accretion, cratonization, and subsequent rifting may have influenced lithospheric structure. The 3D common conversion point (CCP) volume produced by stacking back-projected Sp receiver functions reveals a general absence of negative converted phases at the depths of the LAB across much of the central U.S. This observation suggests a gradual velocity decrease between the lithosphere and asthenosphere. Within the lithosphere, the CCP stacks display negative arrivals at depths between 65 km and 125 km. We interpret these as MLDs resulting from the top of a layer of crystallized melts (sill-like igneous intrusions) or otherwise chemically modified lithosphere that is enriched in water and/or hydrous minerals. Chemical modification in this manner would cause a weak layer in the lithosphere that marks the MLDs. The depth and amplitude of negative MLD phases vary significantly both within and between the physiographic provinces of the midcontinent. Double, or overlapping, MLDs can be seen along Precambrian terrane boundaries and appear to result from stacked or imbricated lithospheric blocks. A prominent negative Sp phase can be clearly identified at 80 km depth within the Reelfoot Rift. This arrival aligns with the top of a zone of low shear-wave velocities, which suggests that it marks an unusually shallow seismic LAB for the midcontinent. This boundary would correspond to the top of a region of mechanically and chemically rejuvenated mantle that was likely emplaced during late Precambrian/early Cambrian rifting. These observations suggest that the lithospheric structure beneath the Reelfoot Rift may be an example of a global phenomenon in which MLDs act as weak zones that facilitate the removal of cratonic lithosphere that lies beneath.
DS1989-0934
1989
Hamdani, Y.Mareschal, J.C., Hamdani, Y., Jessup, D.M.Downward continuation of heat flow dataTectonophysics, Vol. 164, No. 2-4, August 1, pp. 129-138GlobalMantle, Crust -heat flow
DS2000-0910
2000
Hamed, J.A.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
DS201212-0122
2012
Hameed, A.Chambers, J.E., Wilkinson, P.B., Wardrop, D., Hameed, A., Hill, L., Jeffrey, C., Loke, Mledrum, Kuras, Cave, GunnBedrock detection beneath river terrace deposits using three dimensional electrical resistivity tomography.Geomorphology, Vol. 177-178, pp. 7-25.TechnologyTomography - not specific to diamonds
DS201312-0144
2013
Hameed, A.Chambers, J.E., Wilkinson, P.B., Wrdrop, D., Hameed, A., Hill, I., Jeffrey, C., Loke, M.H., Meldrum, P.I., Kuras, O., Cave, M., Gunn, D.A.Bedrock detection beneath river terrace deposits using three dimensional electrical resistivity tomography.Geomorphology, Vol. 177-178, pp. 17-25.GlobalGeochronology
DS1988-0287
1988
Hamelin, B.Hamelin, B., Allegre, C.J.Lead isotope study of orogenic lherzolite massifsEarth and Planetary Science Letters, Vol. 91, No. 1-2, December pp. 117-131GlobalGeochronology Lherzolite, Mantle
DS1997-0536
1997
Hamelin, B.Innocent, C., Michard, A., Hamelin, B.Strontium isotopic evidence for ion exchange buffering in tropical laterites from the Parana, BrasilChemical Geology, Vol. 136, No. 3/4 Apr. 25, pp. 219-232BrazilGeochemistry, Laterites
DS2003-0539
2003
Hames, W.Hames, W., McHone, J.G., Renne, P., Ruppel, C.The central Atlantic magmatic province: insights from fragments of PangeaAmerican Geophysical Union, Geophysical Monograph, No. 136, 330p.Brazil, Morocco, Guinea, Guyana, MauritaniaMagmatism
DS200412-0770
2003
Hames, W.Hames, W., McHone, J.G., Renne, P., Ruppel, C.The central Atlantic magmatic province: insights from fragments of Pangea.American Geophysical Union, Geophysical Monograph, No. 136, 330p.South America, Brazil, Guyana, Africa, Guinea, MauritaniaMagmatism
DS201610-1861
2016
Hames, W.Freeman, Z.W., Hames, W., Bridges, D.L.The Devonian Avon alkaline province, Missouri: characterization of subcontinental mantle source and evolution from olivine phenocrysts.GSA Annual Meeting, 1/2p. abstractUnited States, MissouriAlnoite, melilitite

Abstract: We present new data on the crystallization age of, and composition of olivine phenocrysts within, an alnöite and olivine melilitite of the Avon Alkalic Igneous Province (AAIP) of Missouri. The AAIP is an ultramafic igneous province consisting of more than 80 known lithologically and texturally diverse intrusions, cropping out in northeastern flank of the St. Francois Mtn. Terrane. 40Ar/39Ar geochronology of biotite phenocrysts constrains emplacement to 386 +/- 1 Ma. Xenocrystic biotite from one sample yields 40Ar/39Ar age spectra characteristic of episodic loss, indicating crystallization at ca. 1.3 Ga followed by partial loss in the ultramafic magma at 386 Ma. Olivines within the alnöite are subhedral, variably serpentinized, and embayed. Olivines within the melilitite are euhedral, but extensively serpentinized. Disequilibrium textures observed in alnöite olivine are consistent with resorption of magmatic olivine as a result of decompression during crystallization. Euhedral olivine within the melilitite appear to have remained in equilibrium with melt, suggesting derivation of alnöite and melilitite from unique magmas. Major and trace elemental abundances of olivine from the alnöite were characterized with electron probe microanalysis. Olivines are Mg-rich (Fo86.9-Fo89.9), and exhibit systematic variation in trace element (e.g., Ni (1627 to 3580 ppm), Cr (97 to 1603 ppm), Co (149 to 259 ppm), Ti (11 to 267 ppm), Al (undetectable to 923 ppm), and P (undetectable to 433 ppm)) abundances with decreasing forsterite content consistent with fractional crystallization. All geothermometers yield a range in temperature, e.g., the Al in olivine (De Hoog et al., 2009) yield temperatures of 1087° to 1313° C at depths of 80 km to 180 km (modern-day midcontinental LAB). Olivine trace element discrimination diagrams indicate AAIP magmas were derived from mantle sources with an alkalic affinity, similar to other continental alkaline rocks and kimberlite. A mantle origin via partial melting of carbonated peridotite mantle is suggested due to the high Mg content, results of geothermometric modeling, and high Ca and Ti abundance within olivine phenocrysts. Melting of the mantle may have ben triggered by "Acadian" tectonic events.
DS1999-0367
1999
Hames, W.E.Klein, A.C., Steltenpohl, M.G., Hames, W.E., AndresenDuctile and brittle extension in the southern LOfoten Archipelago:implications for differences in tectonicsAmerican Journal of Science, Vol. 299, Jan. pp. 69-89.NorwayBaltic basement, structure, Collisional margin
DS2000-0381
2000
Hames, W.E.Hames, W.E., Renne, P.R.New evidence for geologically instantaneous emplacement of earliest Jurassic Central Atlantic magmatic provinceGeology, Vol. 28, No. 9, Sept. pp. 859-62.United StatesDike swarm
DS201212-0447
2012
Hametner, K.Martin, L.H.J., Schmidt, M.W., Mattsson, H.B., Ulmer, P., Hametner, K., Gunther, D.Element partitioning between immiscible carbonatite-kamafugite melts with application to the Italian ultrapotassic suite.Chemical Geology, Vol. 320-321 pp. 96-112.Europe, ItalyCarbonatite
DS1999-0282
1999
Hamgartner, D.Hamgartner, D.Diamond exploration of the Leser Slave Lake, Otauwau area propertyAlberta Geological Survey, MIN 199900018AlbertaExploration - assessment
DS1999-0283
1999
Hamgartner, D.Hamgartner, D.Diamond exploration of the Sawridge PropertyAlberta Geological Survey, MIN 199900019.AlbertaExploration - assessment
DS201702-0201
2017
Hamid Mumin, A.Chakhmouradian, A.R., Rehuir, E.P., Zaitsev, A.N., Coueslan, C., Xu, C., Kynicky, J., Hamid Mumin, A., Yang, P.Apatite in carbonatitic rocks: compositional variation, zoning, element partitioning and petrogeneitic significance.Lithos, in press available, 138p.TechnologyCarbonatite

Abstract: The Late Cretaceous (ca. 100 Ma) diamondiferous Fort à la Corne (FALC) kimberlite field in the Saskatchewan (Sask) craton, Canada, is one of the largest known kimberlite fields on Earth comprising essentially pyroclastic kimberlites. Despite its discovery more than two decades ago, petrological, geochemical and petrogenetic aspects of the kimberlites in this field are largely unknown. We present here the first detailed petrological and geochemical data combined with reconnaissance Nd isotope data on drill-hole samples of five major kimberlite bodies. Petrography of the studied samples reveals that they are loosely packed, clast-supported and variably sorted, and characterised by the presence of juvenile lapilli, crystals of olivine, xenocrystal garnet (peridotitic as well as eclogitic paragenesis) and Mg-ilmenite. Interclast material is made of serpentine, phlogopite, spinel, carbonate, perovskite and rutile. The mineral compositions, whole-rock geochemistry and Nd isotopic composition (Nd: + 0.62 to - 0.37) are indistinguishable from those known from archetypal hypabyssal kimberlites. Appreciably lower bulk-rock CaO (mostly < 5 wt%) and higher La/Sm ratios (12-15; resembling those of orangeites) are a characteristic feature of these rocks. Their geochemical composition excludes any effects of significant crustal and mantle contamination/assimilation. The fractionation trends displayed suggest a primary kimberlite melt composition indistinguishable from global estimates of primary kimberlite melt, and highlight the dominance of a kimberlite magma component in the pyroclastic variants. The lack of Nb-Ta-Ti anomalies precludes any significant role of subduction-related melts/fluids in the metasomatism of the FALC kimberlite mantle source region. Their incompatible trace elements (e.g., Nb/U) have OIB-type affinities whereas the Nd isotope composition indicates a near-chondritic to slightly depleted Nd isotope composition. The Neoproterozoic (~ 0.6-0.7 Ga) depleted mantle (TDM) Nd model ages coincide with the emplacement age (ca. 673 Ma) of the Amon kimberlite sills (Baffin Island, Rae craton, Canada) and have been related to upwelling protokimberlite melts during the break-up of the Rodinia supercontinent and its separation from Laurentia (North American cratonic shield). REE inversion modelling for the FALC kimberlites as well as for the Jericho (ca. 173 Ma) and Snap Lake (ca. 537 Ma) kimberlites from the neighbouring Slave craton, Canada, indicate all of their source regions to have been extensively depleted (~ 24%) before being subjected to metasomatic enrichment (1.3-2.2%) and subsequent small-degree partial melting. These findings are similar to those previously obtained on Mesozoic kimberlites (Kaapvaal craton, southern Africa) and Mesoproterozoic kimberlites (Dharwar craton, southern India). The striking similarity in the genesis of kimberlites emplaced over broad geological time and across different supercontinents of Laurentia, Gondwanaland and Rodinia, highlights the dominant petrogenetic role of the sub-continental lithosphere. The emplacement of the FALC kimberlites can be explained both by the extensive subduction system in western North America that was established at ca. 150 Ma as well as by far-field effects of the opening of the North Atlantic ocean during the Late Cretaceous.
DS1998-0529
1998
HamiltonGraham, S., Lambert, D.D., Shee, S.R., Smith, HamiltonRe Os and Sm neodymium isotope systematics of alkaline ultramafic rocks, xenoliths and macrocrysts...7th International Kimberlite Conference Abstract, pp. 262-4.AustraliaAlkaline rocks, Yilgarn Craton, Earaheedy Basin area
DS2000-0276
2000
HamiltonErnst, R.E., Buchan, K.L., Hamilton, Okrugin, TomshinIntegrated paleomagnetism and uranium-lead (U-Pb) geochronology of mafic dikes of Eastern Anabar Shield Region: LaurentiaJournal of Geology, Vol. 108, pp. 381-401.Russia, SiberiaMesoproterozoic paleolatitude comparison Laurentia, Geophysics - magnetics
DS2001-0140
2001
HamiltonBuchan, K.L., Ernst, Hamilton, Mertanen, Pesonen, ElmingRodinia: the evidence from integrated paleomagnetism and uranium-lead (U-Pb) geochronologyPrecambrian Research, Vol. 110, pp. 9-32.GlobalGeochronology
DS200912-0341
2009
HamiltonJones, A.G., Evans, Muller, Hamilton, Miensopust, Garcia, Cole, Ngwisanyi, Hutchins, Stoffel Fourie, Jelsma, Aravanis, Petit, Webb, WasborgArea selection for diamonds using magnetotellurics: examples from southern Africa.Lithos, In press - available 35p.Africa, South Africa, BotswanaGeophysics - magnetotellurics
DS200912-0522
2009
HamiltonMuller, M.R., Jones, Evans, Grutter, Hatton, Garcia, Hamilton, Miensopust, Cole, Ngwisanyi, Hutchins, Fourie, Jelsma,Aravanis.Pettit, Webb, WasborgLithospheric structure, evolution and diamond prospectivity of the Rehoboth Terrane and western Kaapvaal Craton, southern Africa: constraints from broadbandLithos, In press - available 57p..Africa, South Africa, BotswanaGeophysics - broadband magnetotellurics
DS201012-0077
2010
HamiltonBuchan, 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
DS201112-0312
2011
HamiltonEvans, R.L., Jones, A.G., Garcia, X., Muller, M., Hamilton, Evans, Fourie, Spratt, Webb, Jelsma, HutchinsElectrical lithosphere beneath the Kaapvaal craton, southern Africa.Journal of Geophysical Research, Vol. 116, B4, B04105.Africa, South AfricaGeophysics - seismics
DS1900-0409
1906
Hamilton, C.Hamilton, C.Description of a New Method of Treating Blue Ground for Recovery of Diamonds.Jewellers Circular Keystone, Vol. 53, No. 16, Nov. 21ST. P. 97.Africa, South AfricaMining Engineering, Diamond Recovery
DS1975-0682
1978
Hamilton, D.L.Barton, M., Hamilton, D.L.Water-saturated Melting Relations to 5 Kilobars of Three Leucite Hills Lavas.Contributions to Mineralogy and Petrology, Vol. 66, PP. 41-49.GlobalKimberlite, Leucite Hills, Leucite, Rocky Mountains
DS1975-0683
1978
Hamilton, D.L.Barton, M., Hamilton, D.L.Water saturated melting relations to 5 kilobars of three leucite Hills, lavas.Contributions to Mineralogy and Petrology, Vol. 66, pp.41-9.WyomingLeucite Hills, Magma - Crystallization
DS1975-0938
1979
Hamilton, D.L.Barton, M., Hamilton, D.L.The Melting Relationships of a Madupite from the Leucite Hills, Wyoming, to 30 Kb.Contributions to Mineralogy and Petrology, Vol. 69, No. 2, PP. 133-142.GlobalLeucite, Rocky Mountains
DS1980-0130
1980
Hamilton, D.L.Freestone, I.C., Hamilton, D.L.The role of liquid immiscibility in the genesis of carbonatites - an experimental study.Contributions to Mineralogy and Petrology, Vol. 73, pp. 105-117.GlobalCarbonatite, Petrology - Experimental
DS1981-0077
1981
Hamilton, D.L.Bedson, P., Hamilton, D.L.Kimberlites, Carbonatites and Liquid ImmiscibilityIn: Fifth progress report of research support by N.E.R.C. 1978- 1980, Progress in experimental petrology, GBR, Vol. 5, pp. 29GlobalCarbonatite
DS1986-0336
1986
Hamilton, D.L.Hamilton, D.L., Bedson, P.Carbonatites by liquid immiscibilityGeological Association of Canada (GAC) Annual Meeting, Vol. 11, p. 77. (abstract.)GlobalCarbonatite
DS1987-0158
1987
Hamilton, D.L.Donaldson, C.H., Hamilton, D.L.Compositional convection and layering in a rock meltNature, Vol. 327, No. 6121, June 4, pp. 413-415GlobalPicrite, Alkaline rocks
DS1988-0288
1988
Hamilton, D.L.Hamilton, D.L., Bedson, P.Distribution of trace elements between immiscible silicate and carbonatitemeltsTerra Cognita, Vol. 8, No. 1, Winter 1988 p. 65. Abstract onlyGlobalBlank
DS1988-0358
1988
Hamilton, D.L.Kjarsgaard, B.A., Hamilton, D.L.Liquid immiscibility and the origin of alkali poor carbonatitesMineralogical Magazine, Vol. 52, No. 364, No. 1, March pp. 43-56GlobalBlank
DS1989-0577
1989
Hamilton, D.L.Hamilton, D.L., Bedson, P., Esson, J.The behaviour of trace elements in the evolution of carbonatitesCarbonatites -Genesis and Evolution, Ed. K. Bell Unwin Hyman Publ, pp. 405-427TanzaniaExperimental Petrology, Oldoinyo Lengai
DS1989-0788
1989
Hamilton, D.L.Kjarsgaard, B., Hamilton, D.L., Gittins, J.Carbonatite origin and diversity.. discussion and replyNature, Vol. 338, No. 6216, April 13, pp. 547-548GlobalCarbonatite, Genesis
DS1989-0789
1989
Hamilton, D.L.Kjarsgaard, B.A., Hamilton, D.L.The genesis of carbonatites by immiscibilityCarbonatites -Genesis and Evolution, Ed. K. Bell Unwin Hyman Publ, pp. 388-404GlobalExperimental Petrology, Fractional crystallizatio
DS1989-0790
1989
Hamilton, D.L.Kjarsgaard, B.A., Hamilton, D.L.Melting experiments on shombole nephelinites: silicate/carbonateimmiscibility, phase relations and the liquid line of descentGeological Association of Canada (GAC) Annual Meeting Program Abstracts, Vol. 14, p. A50. (abstract.)KenyaGregory Rift
DS1990-0244
1990
Hamilton, D.L.Brooker, R.A., Hamilton, D.L.Three liquid immisicibility and the origin of carbonatitesNature, Vol. 346, No. 6283, ugust 2, pp. 459-461GlobalCarbonatite, Chemistry
DS1990-0245
1990
Hamilton, D.L.Brooker, R.A., Hamilton, D.L.Three liquid immiscibility and the origin of carbonatitesTerra, Abstracts of Experimental mineralogy, petrology and, Vol. 2, December abstracts p. 67GlobalOrigin, Carbonatite
DS1993-0622
1993
Hamilton, D.L.Hamilton, D.L., Kjarsgaard, B.A.The immiscibility of silicate and carbonate liquidsSouth African Journal of Geology, Vol. 96, No. 3, Sept. pp. 139-142.TanzaniaCarbonatite, Oldoinyo Lengai
DS1993-1354
1993
Hamilton, D.L.Ryabchikov, I.D., Hamilton, D.L.Interaction of carbonate phosphate melts with mantle peridotites at 20 - 35kbar.South African Journal of Geology, Vol. 96, No. 3, Sept. pp. 143-148.GlobalSpinel lherzolite, Petrology -experimental
DS1994-0921
1994
Hamilton, D.L.Kjarsgaard, B.A., Hamilton, D.L., Peterson, T.D.Peralkaline nephelinite carbonatite liquid immiscibility: comparison of phase compositions..lavasCarbonatite volcanism, Ed. Bell, K., Keller, J., pp. 163-190.TanzaniaPetrology - Carbonatite volcanism., Deposit -Oldoinyo Lengai
DS1994-1507
1994
Hamilton, D.L.Ryabchikov, I.D., Hamilton, D.L.Near solidus liquids in carbonatized mantle peridotites in the presence of apatite and uraninite.Geochemistry International, Vol. 31, No. 3, pp. 77-85.MantlePeridotites
DS1994-0703
1994
Hamilton, E.Hamilton, E.Logistics report on high sensitivity magnetics airborne geophysical project le Tac.Quebec Department of Mines, GM 52942, 56p.QuebecExploration - assessment, Diabior Inc.
DS1989-0578
1989
Hamilton, J.Hamilton, J.Earth science in Canada from a user's viewpointGeoscience Canada, Vol. 16, No. 4, December pp. 213-220CanadaOverview (Geological Association of Canada (GAC) Pres. address), Exploration philosphy
DS201807-1516
2018
Hamilton, J.L.Mervine, E.M., Wilson, S.A., Power, I.M., Dipple, G.M., Turvey, C.C., Hamilton, J.L., Vanderzee, S., Raudsepp, M., Southam, C., Matter, J.M., Kelemen, P.B., Stiefenhofer, J., Miya, Z., Southam, G.Potential for offsetting diamond mine carbon emissions through mineral carbonation of processed kimberlite: an assessment of De Beers mine sites in South Africa and Canada.Mineralogy and Petrology, 10.1007/ s00710-018- 0589-4, 14p.Africa, South Africa, Canada, Northwest Territories, Ontariodeposit - Venetia, Voorspoed, Gahcho Kue, Victor, Snap Lake

Abstract: De Beers kimberlite mine operations in South Africa (Venetia and Voorspoed) and Canada (Gahcho Kué, Victor, and Snap Lake) have the potential to sequester carbon dioxide (CO2) through weathering of kimberlite mine tailings, which can store carbon in secondary carbonate minerals (mineral carbonation). Carbonation of ca. 4.7 to 24.0 wt% (average?=?13.8 wt%) of annual processed kimberlite production could offset 100% of each mine site’s carbon dioxide equivalent (CO2e) emissions. Minerals of particular interest for reactivity with atmospheric or waste CO2 from energy production include serpentine minerals, olivine (forsterite), brucite, and smectite. The most abundant minerals, such as serpentine polymorphs, provide the bulk of the carbonation potential. However, the detection of minor amounts of highly reactive brucite in tailings from Victor, as well as the likely presence of brucite at Venetia, Gahcho Kué, and Snap Lake, is also important for the mineral carbonation potential of the mine sites.
DS1900-0410
1906
Hamilton, J.S.Hamilton, J.S.Mining Diamonds in South Africa 1906World's Work, Vol. 8, PP. 234-235.Africa, South AfricaHistory
DS1910-0053
1910
Hamilton, J.S.Hamilton, J.S.Mining Diamonds in South Africa 1910World's Work, Vol. 12, AUGUST, PP. 7904-7907.South Africa, Griqualand WestHistory
DS1981-0200
1981
Hamilton, J.S.Hamilton, J.S.Late Cenozoic Alkalic Volcanics of the Level Mountain Range northwestern British Columbia: Geology, Petrology and Paleomagnetism.Ph.d. Thesis, University Alberta, Edmonton., Canada, British ColumbiaRegional Studies
DS2002-0640
2002
Hamilton, K.Hamilton, K.The role of Australian stock exchange limited in enhancing reporting standardsAustralian Institute of Mining and Metallurgy, No. 3/2002, pp.57-62.AustraliaMineral reserves - definitions, disclosure framework, JORC code
DS1990-1038
1990
Hamilton, L.Mickus, K., Keller, G.R., Hamilton, L., Jurick, D., Gurrola, H.Geophysical transects across the southern midcontinent region of the UnitedStatesGeological Society of America (GSA) Annual Meeting, Abstracts, Vol. 22, No. 7, p. A191GlobalGeochronology, Geophysics
DS200712-0042
2007
Hamilton, M.Ayer, J., Hamilton, M., Jetchum, J., Stott, G., Wilson, A., Wyman, D.The age and provenance of Archean diamond bearing rocks in the Wawa area, northeastern Ontario.Diatreme breccias.Geological Association of Canada, Gac-Mac Yellowknife 2007, May 23-25, Volume 32, 1 pg. abstract p.4.Canada, Ontario, WawaDiatreme breccias
DS201905-1077
2018
Hamilton, M.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.
DS201906-1322
2019
Hamilton, M.McCausland, P., Higgins, M., LeCheminant, A., Jourdan, F., Hamilton, M., Murphy, J.B.Laurentia during the mid-Edicacaran: paleomagnetism and 580 Ma age of the Saint Honore alkali intrusion and related dykes, Quebec. GAC/MAC annual Meeting, 1p. Abstract p. 141.Canada, Quebecdeposit - Saint Honore

Abstract: We sampled the mid-Ediacaran Saint-Honoré alkali intrusion and related dykes in the Saguenay City region of Québec for paleomagnetic and U-Pb, 40Ar/39Ar geochonologic study. 40Ar/39Ar geochronology of phlogopite separates from carbonatite of the central intrusion return plateau ages with a weighted mean of 578.3 ± 3.5 Ma. Baddeleyite from a phoscorite dyke provides a concordant age of 580.25 ± 0.87 Ma for the crystallization of the dykes associated with the St-Honoré intrusive complex. Paleomagnetic results from the intrusion itself and related carbonatite and lamprophyre dykes exhibit some streaking between higher to moderate inclination directions, even at the site level, after screening to remove a steep, present-day viscous remanence. The predominant St-Honoré mean direction (13 sites), which is primary (baked contact test on the host Lac St-Jean anorthosite), is D = 119, I = 72.3°; a95 = 9.5°, retained at higher coercivity and to high unblocking temperatures by titanomagnetite. Assuming a geocentric axial dipole, this result places the St. Honoré locality at 57° S at ~ 580 Ma, implying that Laurentia straddled mid-paleolatitudes at that time. Notably, the paleopole location at 27.2° N, 320.7 E (dp = 15°, dm = 17°) is consistent with similar mid-Ediacaran age paleopoles which place Laurentia at mid- to high paleolatitudes. The Saint-Honoré result implies that Laurentia had moved from low latitude in the early Ediacaran to higher southern paleolatitudes by 580-570 Ma, and then back to low paleolatitudes by as early as 564 Ma. Viewed as apparent polar wander (APW), this motion traces an 'Ediacaran loop' that can also be seen in similar-aged paleomagnetic results from at least two other paleocontinents. The similar APW loops suggest a role for true polar wander in Ediacaran geodynamics, and perhaps help to define a longitudinally-constrained global Ediacaran paleogeography.
DS1994-1411
1994
Hamilton, M.A.Prevec, S.A., Stevenson, R.K., Emslie, R.F., Hamilton, M.A.Evolution of the mid-Proterozoic Flowers River peralkaline granite, Labrador: geochemical and samarium-neodymium (Sm-Nd) isotopic evidence.Geological Association of Canada (GAC) Abstract Volume, Vol. 19, p. posterLabradorAlkaline rocks, Flowers River
DS1997-0315
1997
Hamilton, M.A.Emslie, R.F., Hamilton, M.A., Gower, C.F.The Michael gabbro and other mesoproterozoic lithospheric probes in southern and central labrador.Canadian Journal of Earth Sciences, Vol. 34, pp. 1566-80.Quebec, Labrador, UngavaLithosphere, Tectonics
DS1998-0566
1998
Hamilton, M.A.Hamilton, M.A., Pearson, D.G., Stern R.A., Boyd, F.R.Constraints on MARID petrogenesis: SHRIMP II uranium-lead (U-Pb) zircon evidence for pre-eruption Metasomatism..7th International Kimberlite Conference Abstract, pp. 296-8.South AfricaGeochronology, Deposit - KampfersdaM.
DS1999-0200
1999
Hamilton, M.A.Evans, R.J., Ashwal, L.D., Hamilton, M.A.Mafic, ultramafic and anorthositic rocks of the Tete Complex: petrology, age and significance.South African Journal of Geology, Vol. 102, No. 2, June, pp. 153-66.GlobalPetrology
DS2000-0382
2000
Hamilton, M.A.Hamilton, M.A., Roddick, J.C., Delaney, G.New uranium-lead (U-Pb) geochronological constraints on the age of basement and cover in the eastern Wollaston Domain...Geological Association of Canada (GAC)/Mineralogical Association of Canada (MAC) 2000 Conference, 4p. abstract.SaskatchewanGeochronology, Craton - Rae and Hearne
DS2001-0109
2001
Hamilton, M.A.Bickford, M.E., Hamilton, M.A., Wortman, G., Hill, B.M.Archean rocks in the southern Rottenstone Domain: significance for the evolution of Trans Hudson OrogenCanadian Journal of Earth Sciences, Vol. 38, No. 7, July pp. 1017-25.Saskatchewan, ManitobaGeochronology, Trans Hudson orogeny
DS2001-0440
2001
Hamilton, M.A.Hamilton, M.A., Goutier, J., Matthews, W.uranium-lead (U-Pb) baddeleyite age for the Paleoproterozoic Lac Esprit dyke swarm, James Bay region, Quebec.Geological Survey of Canada (GSC) Current Research, No. 2001-F5, 17p.Quebec, James Bay LowlandsGeochronology, Yasinski Lake, dike swarm
DS2002-0346
2002
Hamilton, M.A.Dahl, P.S., Hamilton, M.A.Ion microprobe evidence for early Proterozoic thermotectonics reworking of the NW Archean Wyoming...Gac/mac Annual Meeting, Saskatoon, Abstract Volume, P.25., p.25.MontanaGreat Falls Tectonic Zone, Tectonics
DS2002-0347
2002
Hamilton, M.A.Dahl, P.S., Hamilton, M.A.Ion microprobe evidence for early Proterozoic thermotectonics reworking of the NW Archean Wyoming...Gac/mac Annual Meeting, Saskatoon, Abstract Volume, P.25., p.25.MontanaGreat Falls Tectonic Zone, Tectonics
DS2002-0501
2002
Hamilton, M.A.Garde, A.A., Hamilton, M.A., Chadwick, B., Grocott, J., McCaffrey, K.J.W.The Ketilidian orogen of South Greenland: geochronology, tectonics, magmatism andCanadian Journal of Earth Science, Vol.39,5, May, pp.765-93.GreenlandTectonics
DS2002-0650
2002
Hamilton, M.A.Hanmer, S., Hamilton, M.A., Crowley, J.L.Geochronological constraints on Paleoarchean thrust nappe and Neoarchean accretionary tectonics in southern West Greenland.Tectonophysics, Vol. 350,No.3, pp. 255-71.GreenlandGeochronology - not specific to diamonds
DS2003-0540
2003
Hamilton, M.A.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
DS200512-0201
2004
Hamilton, M.A.Dahl, P.S., Hamilton, M.A., Wooden, J.L., Tracy, R.J., Loehn, C.W., Jones, C.L., Foland, K.A.Do 2450-2480 mineral ages from Wyoming cratonic margins (USA) indicate incipient breakup of supercontinet Kenorland?Geological Society of America Annual Meeting ABSTRACTS, Nov. 7-10, Paper 142-8, Vol. 36, 5, p. 340.United States, WyomingGeochronology
DS200512-0245
2005
Hamilton, M.A.Dostal, J., Keppie, J.D., Hamilton, M.A., Araab, E.M., Lefort, J.P., Murphy, J.B.Crustal xenoliths in Triassic lamprophyre dykes in western Morocco: tectonic implications for the Rheic Ocean suture.Geological Magazine, Vol. 142, 2, pp. 159-172.Africa, MoroccoLamprophyre
DS200612-1457
2005
Hamilton, M.A.Vaillancourt, C., Ayer, J.A., Hamilton, M.A.Project 03-002. Synthesis of Archean geology and diamond bearing rocks in the Michipicoten Greenstone Belt: results from microdiamond extraction and geochronology.Ontario Geological Survey Summary of Fieldwork 2005, O.F. 6172, pp. 8-1-13.Canada, Ontario, WawaGeochronology, geochemsirty
DS200712-0120
2007
Hamilton, M.A.Buchan, K.L., Goutier, J., Hamilton, M.A., Ernst, R.E., Matthews, W.A.Paleomagnetism, U Pb geochronology and geochemistry of Lac Esprit and other dyke swarms, James Bay area, Quebec: implications for Paleoproterozoic deformationCanadian Journal of Earth Sciences, Vol. 44, 5, pp. 643-664.Canada, QuebecDyke swarms
DS200712-0212
2007
Hamilton, M.A.Dahl, P.S., Hamilton, M.A., Wooden, J.L., Foland, K.A., Frei, R., McCombc, J.A., Holm, D.K.2480 Ma mafic magmatism in the northern Black Hills, South Dakota: a new link connecting the Wyoming and Superior Cratons.Canadian Journal of Earth Sciences, Vol. 43, 10, pp. 1579-1600.United States, Wyoming, Canada, AlbertaMagmatism
DS200812-0443
2008
Hamilton, M.A.Halls, H.C., Davis, D.W., Stott, G.M., Ernst, R.E., Hamilton, M.A.The Paleoproterozoic Marathon large igneous province: new evidence for a 2.1 Ga long lived mantle plume event along the southern margin of the N.A. Superior ProvincePrecambrian Research, Vol. 162, 3-4, pp. 327-353.Canada, OntarioMantle plume
DS201012-0185
2010
Hamilton, M.A.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
DS201012-0262
2010
Hamilton, M.A.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
DS201312-0249
2013
Hamilton, M.A.Ernst, R.E., Pereira, E., Hamilton, M.A., Pisarevsky, S.A., Rodriques, J., Tasinari, C.C.G., Teixeira, W., Van-Dunem, V.Mesoproterozoic intraplate magmatic 'barcode' record of the Angola portion of the Congo craton: newly dated magmatic events at 1505 and 1110 Ma and implications for Nuna ( Columbia) supercontinent reconstructions.Precambrian Research, Vol. 230, pp. 103-118.Africa, AngolaMagmatism
DS201603-0383
2016
Hamilton, M.A.Hamilton, M.A., Buchan, K.L.A 2169 Ma U-Pb baddeleyite age for the Otish gabbro, Quebec: implications for correlation of Proterozoic magmatic events and sedimentary seuences in the eastern Superior province.Canadian Journal of Earth Sciences, Vol. 53, 2, pp. 119-128.Canada, QuebecGeochronology
DS201607-1295
2016
Hamilton, M.A.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.
DS201804-0748
2018
Hamilton, M.A.Teixeira, W., Hamilton, M.A., Girardi, A.V., Faleiros, F.M.U Pb baddeleyite ages of key dyke swarms in the Amazonian craton ( Carajas/Rio Maria and Rio Apa areas): tectonic implications for events at 1880, 1110 Ma, 535 Ma and 200 Ma.Precambrian Research, in press available 19p.South Americacraton - Amazonian

Abstract: U-Pb baddeleyite ages for key mafic dykes of the Amazonian Craton reveal four significant intraplate episodes that allow connections with global igneous activity through time and supercontinent cycles. The oldest dykes (Carajás-Rio Maria region) are diabases with ages of 1880.2 ± 1.5 Ma and 1884.6 ± 1.6 Ma, respectively, corresponding with the Tucumã swarm which crops out to the west and is age-equivalent. The magmatic activity has a genetic link with the ca. 1.88 Ga Uatumã Silicic Large Igneous Province (SLIP), characterized by felsic plutonic-volcanic rocks. There is an age correlation with LIP events (ca. 1880 Ma) in the Superior, Slave, Indian and other cratons. This magmatism could be derived from significant perturbations of the upper mantle during the partial assembly of Columbia. Gabbronorite of the Rio Perdido Suite (Rio Apa Terrane) crystallized at 1110.7 ± 1.4 Ma, and is identical to that of the Rincón del Tigre-Huanchaca LIP event of the Amazonian Craton. This event was synchronous with the initiation of Keweenawan magmatism of central Laurentia (Midcontinent Rift) and also with coeval units in the Kalahari, Congo and India cratons. The two youngest U-Pb dates (535 and 200 Ma) occur in the Carajás region. Diabase of the Paraupebas swarm yields an age of 535.1 ± 1.1 Ma, which may be correlative with the giant Piranhas swarm located ca. 900 km apart to the west. The Paraupebas swarm is correlative with post-collisional plutonism within the Araguaia marginal belt. Therefore, the Cambrian dykes may reflect reactivation of cooled lithosphere, due to crustal extension/transtension active along the craton’s margin during assembly of West Gondwana. This magmatism is also contemporaneous with the 539-530 Ma Wichita LIP of southern Laurentia. The youngest studied Carajás region dyke was emplaced at ca. 200 Ma, corresponding with 40Ar/39Ar ages for the Periquito dykes west of Carajás and with most K-Ar ages of the giant Cassiporé swarm, located north of the study area. The newly dated ca. 200 Ma dyke fits well into the known, brief span of ages for the CAMP Large Igneous Province event, around the present central and northern Atlantic Ocean.
DS200612-0524
2006
Hamilton, M.P.Hamilton, M.P., Jones, A.G., Evans, R.L., Evans, S., Fourie, C.J.S., Garcia, X., Mountford, A., Spratt, J.E., SAMTEX MTElectrical anisotropy of South African lithosphere compared with seismic anisotropy from shear wave splitting analyses.Physics of the Earth and Planetary Interiors, In press, availableAfrica, South AfricaGeophysics - magnetotellurics
DS200712-0404
2006
Hamilton, M.P.Hamilton, M.P., Jones, A.G., Evans, R.L., Evans, S., Fourie, C.J.S., Mountford, SprattElectrical anisotropy of South African lithosphere compared with seismic from shear wave splitting analyses.Physics of the Earth and Planetary Interiors, Vol. 158, 2-4, Oct. 16, pp. 226-239.Africa, South AfricaGeophysics - seismics
DS1990-0642
1990
Hamilton, R.Hamilton, R., Rock, N.M.S.Geochemistry, mineralogy and petrology of a new find of lamprophyres from Bulletinjah Pool, Nabberu Basin, Yilgarn Craton, Western AustraliaLithos, Vol. 24, No. 4, August pp. 275-290AustraliaLamprophyres, Bulletinjah Pool
DS1990-0643
1990
Hamilton, R.Hamilton, R., Rock, N.M.S.Geochemistry, mineralogy and petrology of a new find of ultramafic lamprophyres from Bulletinjah Pool, Nabberu Basin, Yilgarn Craton, WesternAustraliaLithos, Vol. 24, No. 4, August pp. 275-290AustraliaLamprophyres, Geochemistry
DS1991-0504
1991
Hamilton, R.Foster, J.G., Hamilton, R., Rock, N.M.S.The mineralogy, petrology and geochemistry of ultramafic lamprophyres Of the Yilgarn craton, western AustraliaProceedings of Fifth International Kimberlite Conference held Araxa June 1991, Servico Geologico do Brasil (CPRM) Special, pp. 112-115AustraliaGeochronology, Mineralogy -cognate
DS1996-0559
1996
Hamilton, R.Graham, S., Lambert, D.D., Shee, S.R., Hamilton, R., FosterAlkaline ultramafic rocks as probes of lithospheric mantle enrichment events in the eastern Yilgarn craton.Australia Nat. University of Diamond Workshop July 29, 30. abstract, 1p.AustraliaCraton, Alkaline rocks, geochronology
DS1996-0587
1996
Hamilton, R.Hamilton, R.Review of diamond exploration in Australia - its demands and successesAustralia Nat. University of Diamond Workshop July 29, 30., 6p.AustraliaDiamond Exploration, Overview
DS1997-0436
1997
Hamilton, R.Graham, S., Lambert, D.D., Shee, S.R., Hamilton, R.ReOs and SmNd evidence for Archean lithosphere mantle modification byorogenesis, Norseman, Western AustraliaGeological Society of Australia Abstracts, No. 44, p. 35. 1p.Australia, Western AustraliaGeochronology, picroilmentites, melnoite, Diamond exploration
DS1998-1450
1998
Hamilton, R.Taylor, W.R., Kamperman, M., Hamilton, R.New thermometer and oxygen fugacity sensor calibrations for ilmenite -chromian spinel bearing peridoite assemb7th International Kimberlite Conference Abstract, p. 891.GlobalGeothermometry
DS1980-0357
1980
Hamilton, R.M.Zoback, M.D., Hamilton, R.M., Crone, H.J., et al.Recurrent Intraplate Tectonism in the New Madrid Seismic ZonScience., Vol. 209, PP. 971-976.GlobalMid-continent
DS1982-0245
1982
Hamilton, R.M.Hamilton, R.M., Zoback, M.D.Tectonic Features of the New Madrid Seismic Zone from Seismic Reflection Profiles.United States Geological Survey (USGS) PROF. PAPER., No. 1236, PP. 55-82.GlobalMid Continent
DS1985-0131
1985
Hamilton, R.M.Crone, A.J., Mckeown, F.A., Harding, S.T., Hamilton, R.M., Russ.Structure of the New Madrid Seismic Source Zone in Southeastern Missouri and Northeastern Arkansaw.Geology, Vol. 13, No. 8, PP. 547-550.United States, Gulf Coast, ArkansasGeophysics
DS1987-0272
1987
Hamilton, R.M.Hamilton, R.M., Agena, W.F., McKeown, F.A.Deep structure of the new Madrid Seismic zone interpreted from seismic reflection profilesEos, Vol. 68, No.44, November 3, p. 1355. abstract onlyArkansas, MissouriGeophysics
DS1989-0990
1989
Hamilton, R.M.McKeown, F.A., Hamilton, R.M.Origin of the Blytheville and Pascola arches in the Reelfoot Rift and their relationship to the New Madrid seismic zoneGeological Society of America (GSA) Annual Meeting Abstracts, Vol. 21, No. 6, p. A148. AbstractMidcontinentTectonics, Reelfoot Rift
DS1990-0644
1990
Hamilton, R.M.Hamilton, R.M., Mooney, W.D.Seismic wave attenuation associated with crustal faults in the New Madrid seismic zoneScience, Vol. 248, No. 4953, April 20, pp. 351-354Arkansas, Missouri, Kentucky, Tennessee, MidcontinentGeophysics -seismics, New Madrid Zone
DS1990-1015
1990
Hamilton, R.M.McKeown, F.A., Hamilton, R.M., Diehl, S.F., Glick, E.E.Diapiric origin of the Blytheville and Pascola arches in the Reelfoot @east-central United States: relation to New Madrid seismicityGeology, Vol. 18, No. 11, November pp. 1158-1162Arkansas, Tennessee, KentuckyReelfoot Rift, Midcontinent
DS2003-0541
2003
Hamilton, S.Hamilton, S.New technologies and new frontiersQuebec Exploration Conference, Nov. 25-27, 1p. abstractOntarioGeophysics - forest rings, mineral chemistry
DS200412-0771
2003
Hamilton, S.Hamilton, S.New technologies and new frontiers.Quebec Exploration Conference, Nov. 25-27, 1p. abstractCanada, OntarioGeophysics - forest rings, mineral chemistry
DS200712-0924
2007
Hamilton, S.Sader, J.A., Leybourne, M.I., McClenaghan, M.B., Hamilton, S.Low temperature serpentinization processes and kimberlite groundwater signature Kirkland Lake and Lake Timiskaming kimberlite fields: implications diamond exploration.Geochemistry: Exploration, Environment, Analysis, Vol. 7, 1, pp. 3-21.Canada, Ontario, Kirkland Lake, TimiskamingGeochemistry - diamond exploration
DS200812-0454
2008
Hamilton, S.Hattori, K., Hamilton, S.Geochemistry of peat over kimberlites in the Attawapiskat area, James Bay Lowlands, northern Ontario.Applied Geochemistry, Vol. 23, 12, pp. 3767-3782.Canada, Ontario, Attawapiskat, James Bay LowlandsDeposit - Victor
DS1996-0588
1996
Hamilton, S.D.Hamilton, S.D.High resolution dat a presents new possibilities... GISEarth Observation Magazine, November p. 37-38.GlobalRemote sensing -GIS
DS1996-0589
1996
Hamilton, S.D.Hamilton, S.D.High resolution dat a presents new possibilities... for GISEarth Observation Magazine, November pp. 37-38GlobalRemote sensing, GIS
DS2002-0641
2002
Hamilton, S.M.Hamilton, S.M., Cameron, S.C.M., McClenaghan, M.B., Hall, G.E.M.Thick overburden geochemical methods: studies over volcanogenic massive sulphideOntario Geological Survey Open File, Summary of Field Work, No. 6100, pp. 27-1-17.Ontario, TimminsGeochemistry
DS2003-0194
2003
Hamilton, S.M.Burt, A.K., Hamilton, S.M.Comparison of selective leach signatures over kimberlites, carbonatites, false anomaliesOntario Geological Survey Open File, No. 6120, pp. 42 1-10.OntarioGeochemistry - kimberlites
DS2003-1203
2003
Hamilton, S.M.Sader, J.A., Leybourne, M.I., McClenaghan, M.B., Hamilton, S.M.Geochemistry of groundwater from Jurassic kimberlites in the Kirkland Lake and LakeGeological Survey of Canada Open File, No. 4515, 1 CD 26p. $ 26.00Ontario, Kirkland LakeGeochemistry
DS2003-1204
2003
Hamilton, S.M.Sader, J.A., Leybourne, M.I., McClenaghan, M.B., Hamilton, S.M., RobertsonGroundwater interaction with kimberlites - a geochemical investigation in northeasternExplore ( AEG Newsletter), No. 118, January pp. 1-4.Ontario, Kirkland LakeGeochemistry, Analytical methods and results
DS2003-1205
2003
Hamilton, S.M.Sader, J.A., Leybourne, M.I., McClenaghan, M.B., Hamilton, S.M., RobertsonField procedures and results of groundwater sampling in kimberlite from drillholes in theGeological Survey of Canada Current Research, 9p.Ontario, Kirkland LakeSampling - geomorphology
DS2003-1206
2003
Hamilton, S.M.Sader, J.A., Leybourne, M.L., McClenaghan, M.B., Hamilton, S.M., RobertsonKimberlite exploration using aqueous geochemistry - a new exploration methodGeological Association of Canada Annual Meeting, Abstract onlyGlobalTechniues - geochemistry
DS200412-0250
2003
Hamilton, S.M.Burt, A.K., Hamilton, S.M.Comparison of selective leach signatures over kimberlites, carbonatites, false anomalies and blind targets.Ontario Geological Survey Open File, No. 6120, pp. 42 1-10.Canada, OntarioGeochemistry - kimberlites
DS200412-1717
2003
Hamilton, S.M.Sader, J.A., Leybourne, M.I., McClenaghan, M.B., Hamilton, S.M.Geochemistry of groundwater from Jurassic kimberlites in the Kirkland Lake and Lake Timiskaming kimberlite fields northeastern OGeological Survey of Canada Open File, No. 4515, 1 CD 26p. $ 26.00Canada, Ontario, Kirkland LakeGeochemistry
DS200412-1718
2003
Hamilton, S.M.Sader, J.A., Leybourne, M.I., McClenaghan, M.B., Hamilton, S.M., Robertson, K.Field procedures and results of groundwater sampling in kimberlite from drillholes in the Kirkland Lake and Lake Temiskaming areGeological Survey of Canada Current Research, 9p.Canada, Ontario, Kirkland LakeSampling - geomorphology
DS200412-1719
2003
Hamilton, S.M.Sader, J.A., Leybourne, M.L., McClenaghan, M.B., Hamilton, S.M., Robertson, K.Kimberlite exploration using aqueous geochemistry - a new exploration method.Geological Association of Canada Annual Meeting, Abstract onlyTechnologyTechniues - geochemistry
DS200512-0126
2004
Hamilton, S.M.Burt, A.K., Hamilton, S.M.A comparison of selective leach signatures over kimberlites and other targets. B30,A4,A1.AM47,95-2,MR6, Seed, OPAP, Peddie carbonatites Firstbrook, Borden, Firesand,Ontario Geological Survey Open File, No. 6142, 179p. $ 16.Canada, Ontario, Kirkland Lake, New Liskeard, WawaGeochemistry
DS200512-0924
2004
Hamilton, S.M.Sader, J.A., Leybourne, M.I., McClenaghan, B., Sherwood Lollar, B., Hamilton, S.M.Low T serpentinization and the production of hydrogen and methane gas in kimberlites in northeastern Ontario, Canada.Geological Society of America South Central Meeting ABSTRACTS, Vol. 36, 1, p. 28.Canada, Ontario, Kirkland Lake, Lake TemiskamingA4, B30, C14, groundwater interaction
DS200612-0888
2006
Hamilton, S.M.McClenaghan, M.B., Hamilton, S.M., Hall, G.E.M., Burt, A.K., Kjarsgaard, B.A.Selective leach geochemistry of soils overlying the 95-2, B30 and A4 kimberlites, northeast Ontario.Geological Survey of Canada Open File, OF 5069, 28p. $ 9.00Canada, OntarioGeochemistry
DS200712-0405
2007
Hamilton, S.M.Hamilton, S.M.Major advances in soil geochemical exploration methods for areas of thick glacial drift cover.Proceedings of Exploration 07 edited by B. Milkereit, pp. 263-280.TechnologyGeochemistry - geomorphology review
DS200812-0993
2007
Hamilton, S.M.Sader, J.S., Hamilton, S.M., Hattori, K.H., Braundedr, K.Project unit: 07-32. Surface media geochemical sampling at the Victor kimberlite region, northern Ontario and the Kirkland Lake region northeastern Ontario.Ontario Geological Survey Open File, No. 6213, pp. 19-1-6.Canada, OntarioOverview field work
DS201112-0897
2011
Hamilton, S.M.Sader, J.A., Hattori, K.H., Kong, J.M., Hamilton, S.M., Brauneder, K.Geochemical responses in peat groundwater over Attawapiskat kimberlites, James Bay Lowlands, Canada and their application to diamond exploration.Geochemistry, Exploration, Environment, Analysis:, Vol. 11, pp. 193-210.Canada, Ontario, James Bay LowlandsGeochemistry
DS201312-0769
2013
Hamilton, S.M.Sader, J.A., Hattori, K., Brauneder, K., Hamilton, S.M.The influence of buried kimberlite on methane production in overlying sediment, Attawapiskat region, James Bay lowlands, Ontario.Chemical Geology, Vol. 360-361, pp. 173-185.Canada, Ontario, AttawapiskatMethane
DS201711-2516
2017
Hamilton, T.L.Havig, J.R., Hamilton, T.L., Bachan, A., Kump, L.R.Sulfur and carbon isotopic evidence for metabolic pathway evolution and a four stepped Earth system progression across the Archean and Paleoproterozoic.Earth-Science Reviews, Vol. 174, pp. 1-21.Mantlegeochronology

Abstract: The Earth's mantle has provided a ready redox gradient of sulfur compounds (SO2, H2S) since the stabilization of the crust and formation of the ocean over 4 billion years ago, and life has evolved a multitude of metabolic pathways to take advantage of this gradient. These transitions are recorded in the sulfur and carbon isotope signals preserved in the rock record, in the genomic records of extant microorganisms, and in the changing mantle and crust structure, composition and cycling. Here, we have assembled approximately 20,000 sulfur (d34S, ?33S, ?36S) and carbon (d13C) isotope data points from scientific publications spanning over five decades of geochemical analyses on rocks deposited from 4.0 to 1.5 Ga. We place these data in the context of molecular clock and tectonic and surface redox indicators to identify overarching trends and integrate them into a holistic narrative on the transition of the Earth's surface towards more oxidizing conditions. The greatest extreme in d34S values of sulfide minerals (- 45.5 to 54.9‰) and sulfate minerals (- 13.6 to 46.6‰) as well as d13C values in carbonate minerals (- 16.8 to 29.6‰) occurred in the period following the Great Oxidation Event (GOE), while the greatest extremes in organic carbon d13C values (- 60.9 to 2.4‰) and sulfide and sulfate mineral ?33S and ?36S values (- 4.0 to 14.3‰ and - 12.3 to 3.2‰, respectively) occurred prior to the GOE. From our observations, we divide transitions in Earth's history into four periods: Period 1 (4.00 to 2.80 Ga) during which geochemical cycles were initialized, Period 2 (2.80 to 2.45 Ga) during which S and C isotope systems exhibit changes as conditions build up to the GOE, Period 3 (2.45 to 2.00 Ga) encompassing the GOE, and Period 4 (after 2.00 Ga) after which S and C isotopic systems remained relatively constant marking a time of Earth system geochemical quiescence. Using these periods, we link changes in S and C isotopes to molecular clock work to aid in interpreting emerging metabolic functions throughout Earth's history while underscoring the need for better proxies for robust evolutionary analyses. Specifically, results indicate: 1) an early development of sulfide oxidation and dissimilatory sulfite reduction followed by disproportionation and then sulfate reduction to sulfite resulting in a fully biologically mediated sulfur cycle by ~ 3.25 Ga; 2) support for the acetyl coenzyme-A pathway as the most likely earliest form of biologically mediated carbon fixation following methanogenesis; 3) an increasingly redox-stratified ocean in the Neoarchean with largely oxic surface water and euxinic bottom water during the first half of the Paleoproterozoic; and 4) that secular changes in Earth system crustal cycling dynamics and continent formation likely played a key role in driving the timing of the GOE. Finally, based on geochemical data, we suggest that the Paleoproterozoic be divided into a new Era of the Eoproterozoic (from 2.45 to 2.00 Ga) and the Paleoproterozoic (from 2.00 to 1.60 Ga).
DS2003-0345
2003
Hamilton, T.S.Dostal, J., Brietsprecher, K., Church, B.N., Thorkelson, D., Hamilton, T.S.Eocene melting of Precambrian lithospheric mantle: analcime bearing volcanic rocksJournal of Volcanology and Geothermal Research, Vol. 126, 3-4, Aug. 20, pp. 303-326.British ColumbiaMetasomatism
DS200412-0471
2003
Hamilton, T.S.Dostal, J., Brietsprecher, K., Church, B.N., Thorkelson, D., Hamilton, T.S.Eocene melting of Precambrian lithospheric mantle: analcime bearing volcanic rocks from the Challis Kam loops belt of south centrJournal of Volcanology and Geothermal Research, Vol. 126, 3-4, Aug. 20, pp. 303-326.Canada, British ColumbiaMetasomatism
DS2003-0542
2003
Hamilton, W.A.Hamilton, W.A.An alternative EarthGeology Today, Vol. 13, No. 11, Nov., pp. 4-12.GlobalHistory - tectonics
DS200412-0772
2003
Hamilton, W.A.Hamilton, W.A.An alternative Earth.Geology Today, Vol. 13, no. 11, Nov., pp. 4-12.TechnologyHistory - tectonics
DS1995-0733
1995
Hamilton, W.B.Hamilton, W.B.Subduction systems and magmatismin: volcanism Association with extension, Geological Society of London Special Paper, No. 81, pp. 3-28GlobalMagma, Subduction
DS1995-0734
1995
Hamilton, W.B.Hamilton, W.B.Subduction systems and magmatismvolcanism with extensions at plate Boundaries, Geological Society of London Special Paper 81, pp. 3-28.MantlePlate tectonics, Subduction
DS1998-0567
1998
Hamilton, W.B.Hamilton, W.B.Archean magmatism and deformation were not products of plate tectonicsPrecambrian Research, Vol. 91, No. 1-2, Aug. 1, pp. 143-180MantleMagmatism, Tectonics
DS1998-0568
1998
Hamilton, W.B.Hamilton, W.B.Archean magmatism and deformation were not products of plate tectonicsPrecambrian Research, Vol. 91, No. 1-2, Aug. 1, pp. 143-180.MantleTectonics, Magmatism - not specific to diamonds
DS2002-0642
2002
Hamilton, W.B.Hamilton, W.B.Driving mechanism and dynamic framework of plate tectonics: implications of top side tectonics.Geological Society of America Annual Meeting Oct. 27-30, Abstract p. 21.California, mantleSubduction
DS2002-0643
2002
Hamilton, W.B.Hamilton, W.B.Plate tectonic circulation is driven by cooling from the top and is closed within the upper mantle.Gac/mac Annual Meeting, Saskatoon, Abstract Volume, P.45., p.45.MantleTectonics, Subduction
DS2002-0644
2002
Hamilton, W.B.Hamilton, W.B.Plate tectonic circulation is driven by cooling from the top and is closed within the upper mantle.Gac/mac Annual Meeting, Saskatoon, Abstract Volume, P.45., p.45.MantleTectonics, Subduction
DS200712-0406
2006
Hamilton, W.B.Hamilton, W.B.Earth's first two billion years - the era of internally mobile crust.Geological Society of America Annual Meeting, Vol. 38, 7, Nov. p. 211 abstractMantleTectonics
DS200812-0444
2007
Hamilton, W.B.Hamilton, W.B.Earth's first 2 billion years - the era of internally mobile crust.Geological Society of America, Memoir Framework of continental crust, No. 200, pp. 233-296.MantleReview
DS200812-0445
2007
Hamilton, W.B.Hamilton, W.B.Driving mechanism and 3-D circulation of plate tectonics.Geological Society of America, Special Paper 433, pp. 1-26.MantleTectonics
DS201112-0406
2011
Hamilton, W.B.Hamilton, W.B.Plate tectonics began in Neoproterozoic time, plumes from deep mantle have never opened.Lithos, In press available, 20p.MantlePlume
DS201312-0273
2013
Hamilton, W.B.Foulger, G.R., Panza, G.F., Artemieva, I.M., Bastow, I.D., Cammarano, F., Evans, J.R., Hamilton, W.B., Julian, B.R., Lustrino, M., Thybo, H., Yanovskaya, T.B.Caveat on tomographic images.Terra Nova, Vol. 25, 4, pp. 259-281.MantleSeismic tomography, geodynamics
DS201312-0358
2013
Hamilton, W.B.Hamilton, W.B.Evolution of the Archean Mohorovic discontinuity from a synaccretionary 4.5 Ga protocrust.Tectonophysics, Vol. 609, pp. 706-733.MantleTectonics
DS1992-0728
1992
Hamilton, W.N.Hora, Z.D., Hamilton, W.N., Grant, B., Kelly, P.D.Industrial minerals of Alberta and British Columbia, Canada. Proceedings Of the 27th. Forum on geology of industrial mineralsBritish Columbia Department of Mines, Paper No. 1991-23, 214p. $ 30.00British Columbia, AlbertaIndustrial minerals, Table of contents
DS1999-0284
1999
Hamilton, W.N.Hamilton, W.N., Price, M.C., Langenberg, C.W.Geological map of AlbertaAlberta Geological Survey, 1:1, 000, 000AlbertaMap - not specific to diamonds
DS1910-0285
1912
Hamilton-Browne, G.Hamilton-Browne, G.A Lost Legionaire in South AfricaUnknown., 308P.South AfricaKimberley, Idb, Diamonds
DS1975-0288
1976
Hamilton-Hill, D. (PSEUD. J. GAWAINE).Hamilton-Hill, D. (PSEUD. J. GAWAINE).The Diamond SeekerJohannesburg: Macmillan., 184P.Tanzania, East AfricaKimberlite, Kimberley:janlib, Biography, Williamson
DS201604-0636
2016
HamisiThomas, R.J, Spencer, C., Bushi, A.M., Baglow, N., Gerrit de Kock, B., Hortswood, M.S.A., Hollick, L., Jacobs, J., Kajara, S., Kaminhanda, G., Key, R.M., Magana, Z., McCourt, M.W., Momburi, P., Moses, F., Mruma, A., Myamilwa, Y., Roberts, N.M.W., HamisiGeochronology of the centra Tanzania craton and its southern and eastern orogenic margins.Precambrian Research, in press available 57p.Africa, TanzaniaGeochronology

Abstract: Geological mapping and zircon U-Pb/Hf isotope data from 35 samples from the central Tanzania Craton and surrounding orogenic belts to the south and east allow a revised model of Precambrian crustal evolution of this part of East Africa. The geochronology of two studied segments of the craton shows them to be essentially the same, suggesting that they form a contiguous crustal section dominated by granitoid plutons. The oldest orthogneisses are dated at ca. 2820 Ma (Dodoma Suite) and the youngest alkaline syenite plutons at ca. 2610 Ma (Singida Suite). Plutonism was interrupted by a period of deposition of volcano-sedimentary rocks metamorphosed to greenschist facies, directly dated by a pyroclastic metavolcanic rock which gave an age of ca. 2725 Ma. This is supported by detrital zircons from psammitic metasedimentary rocks, which indicate a maximum depositional age of ca. 2740 Ma, with additional detrital sources 2820 and 2940 Ma. Thus, 200 Ma of episodic magmatism in this part of the Tanzania Craton was punctuated by a period of uplift, exhumation, erosion and clastic sedimentation/volcanism, followed by burial and renewed granitic to syenitic magmatism. In eastern Tanzania (Handeni block), in the heart of the East African Orogen, all the dated orthogneisses and charnockites (apart from those of the overthrust Neoproterozoic granulite nappes), have Neoarchaean protolith ages within a narrow range between 2710 and 2630 Ma, identical to (but more restricted than) the ages of the Singida Suite. They show evidence of Ediacaran "Pan-African" isotopic disturbance, but this is poorly defined. In contrast, granulite samples from the Wami Complex nappe were dated at ca. 605 and ca. 675 Ma, coeval with previous dates of the "Eastern Granulites" of eastern Tanzania and granulite nappes of adjacent NE Mozambique. To the south of the Tanzania Craton, samples of orthogneiss from the northern part of the Lupa area were dated at ca. 2730 Ma and clearly belong to the Tanzania Craton. However, granitoid samples from the southern part of the Lupa "block" have Palaeoproterozoic (Ubendian) intrusive ages of ca. 1920 Ma. Outcrops further south, at the northern tip of Lake Malawi, mark the SE continuation of the Ubendian belt, albeit with slightly younger ages of igneous rocks (ca. 1870-1900 Ma) which provide a link with the Ponte Messuli Complex, along strike to the SE in northern Mozambique. In SW Tanzania, rocks from the Mgazini area gave Ubendian protolith ages of ca. 1980-1800 Ma, but these rocks underwent Late Mesoproterozoic high-grade metamorphism between 1015 and 1040 Ma. One granitoid gave a crystallisation age of ca. 1080 Ma correlating with known Mesoproterozoic crust to the east in SE Tanzania and NE Mozambique. However, while the crust in the Mgazini area was clearly one of original Ubendian age, reworked and intruded by granitoids at ca. 1 Ga, the crust of SE Tanzania is a mixed Mesoproterozoic terrane and a continuation from NE Mozambique. Hence the Mgazini area lies at the edge of the Ubendian belt which was re-worked during the Mesoproterozoic orogen (South Irumide belt), providing a further constraint on the distribution of ca. 1 Ga crust in SE Africa. Hf data from near-concordant analyses of detrital zircons from a sample from the Tanzania Craton lie along a Pb-loss trajectory (Lu/Hf = 0), extending back to ~3.9 Ga. This probably represents the initial depleted mantle extraction event of the cratonic core. Furthermore, the Hf data from all igneous samples, regardless of age, from the entire study area (including the Neoproterozoic granulite nappes) show a shallow evolution trend (Lu/Hf = 0.028) extending back to the same mantle extraction age. This implies the entire Tanzanian crust sampled in this study represents over 3.5 billion years of crustal reworking from a single crustal reservoir and that the innermost core of the Tanzanian Craton that was subsequently reworked was composed of a very depleted, mafic source with a very high Lu/Hf ratio. Our study helps to define the architecture of the Tanzanian Craton and its evolution from a single age-source in the early Eoarchaean.
DS1860-0105
1870
Hamlin, A.C.Hamlin, A.C.The Gems of the United StatesAmerican Association Proceedings, Vol. 18, PP. 210-216.United StatesGemology
DS1860-0435
1884
Hamlin, A.C.Hamlin, A.C.Leisure Hour Among the GemsBoston: James R. Osgood And Co., 300P.Africa, South AfricaKimberley
DS1860-0436
1884
Hamlin, A.C.Hamlin, A.C.Diamonds in Georgia. #1Leisure Hours Among The Gems, PP. 49-51.United States, Georgia, North Carolina, AlabamaDiamond Occurrence
DS201506-0272
2015
Hamling, I.J.Hamling, I.J., Wallace, L.M.Silent triggering: aseismic crustal faulting induced by a subduction slow slip event.Earth and Planetary Science Letters, Vol. 421, pp. 13-19.MantleSubduction
DS2001-0441
2001
Hamma, J.Hamma, J., Suito, K.Thermoelastic models of minerals and the composition of the Earth's lower mantlePhysics of the Earth and Planetary Interiors, Vol. 125, No. 1-4, pp. 147-66.MantleGeophysics - seismics, Perovskites, magnesiowustite
DS1990-0645
1990
Hammack, J.L.Hammack, J.L., Nixon, G.T., Wong, R.H., Paterson, W.P.E.Geology and noble metal geochemistry of the Wrede Creek ultramafic North-central British ColumbiaBritish Columbia Mineral Resources Division, Paper 1990-1, pp. 405-416British ColumbiaAlaskan type ultramafic complex, Wrede Creek complex
DS1990-1114
1990
Hammack, J.L.Nixon, G.T., Hammack, J.L., Connelly, J.N., Case, G., PatersonGeology and noble metal geochemistry of the Polarisultramafic complex, North-central British ColumbiaBritish Columbia Mineral Resources Division, Paper 1990-1, pp. 387-404British ColumbiaAlaskan type ultramafic complex, Polaris complex
DS1990-1115
1990
Hammack, J.L.Nixon, G.T., Hammack, J.L., Paterson, W.P.E.Geology and noble metal geochemistry of the Johanson Lake ultramaficcomplex, North-central British ColumbiaBritish Columbia Mineral Resources Division, Paper 1990-1, pp. 417-426British ColumbiaAlaskan type ultramafic complex, Johanson Lake complex
DS1993-0623
1993
Hammarstrom, J.M.Hammarstrom, J.M., Zientek, M.L., Elliott, J.E.Mineral resource assessment of the Absaroka-Beartooth study area, Custer and Gellatin national forests, MontanaUnited States Geological Survey (USGS) Open File, No. 93-0207, 295p. 19 maps $ 136.00MontanaMineral Resource study
DS1997-0296
1997
Hammen, J.L.Dunnigan, G.M., Hammen, J.L., Harris, T.R.A SAS-IML program for implementing two phase regression analysis of geophysical time series dataComputers and Geosciences, Vol. 23, No. 7, pp. 763-770GlobalComputers, Program - SAS-IML
DS2000-0903
2000
HammerSmith, C.P., Bosshart, G., Pnahlo, Hammer, KlapperGE POL diamonds: before and after. Type 11a and HPHT annealing .Gems and Gemology., Vol. 36, Fall, pp. 192-215.GlobalDiamond - enhancement, colour change, Cathodluminescence, photoluminescence
DS202002-0183
2019
Hammer, J.E.First, E.C., Leonhardi, T.C., Hammer, J.E.Effects of superheating magnitude on olivine growth.Contributions to Mineralogy and Petrology, Vol. 175, 13p. pdfMantlemagmatism

Abstract: Magmatic superheating is a condition with relevance to natural systems as well as experimental studies of crystallization kinetics. Magmas on Earth and other planetary bodies may become superheated during adiabatic ascent from the mantle or as a consequence of meteorite impact-generated crustal melting. Experimental studies of igneous processes commonly employ superheating in the homogenization of synthetic starting materials. We performed 1-atmosphere dynamic crystallization experiments to study the effects of superliquidus thermal history on the morphologies and compositions of subsequently grown olivine crystals. An ultramafic volcanic rock with abundant olivine was fused above the experimentally determined liquidus temperature (1395 °C), held for 0, 3, or 12 h, cooled at 25 °C h-1, and quenched from 200 °C below the liquidus, all at constant fO2, corresponding to FMQ-2?±?0.2 log units. An increase in olivine morphologic instability is correlated with superheating magnitude, parameterized as the integrated time the sample is held above the liquidus (“TtL”; °C h). We infer that a delay in nucleation, which intensifies monotonically with increasing TtL, causes crystal growth to be increasingly rapid. This result indicates that the structural relaxation time scale controlling the formation of crystal nuclei is (a) far longer than the time scale associated with viscous flow and (b) exceeds the liquidus dwell times typically imposed in crystallization experiments. The influence of magmatic superheating on crystal morphology is similar in sense and magnitude to that of subliquidus cooling rate and thus, both factors should be considered when interpreting the thermal history of a volcanic rock containing anhedral olivine.
DS1997-0468
1997
Hammer, P.T.C.Hammer, P.T.C., Clowes, R.M.MOHO reflectivity patterns - a comparison of Canadian LithoprobetransectsTectonophysics, Vol. 269, No. 3-4, Feb. 15, pp. 179-198CanadaLithoprobe, Geophysics - seismics
DS2003-0543
2003
Hammer, P.T.C.Hammer, P.T.C., Clowes, R.M., Ramachandran, K.Seismic reflection techniques for imaging Diamondiferous kimberlite dykes: a case studyGeological Association of Canada Annual Meeting, Abstract onlyNorthwest TerritoriesGeophysics - seismics
DS2003-0544
2003
Hammer, P.T.C.Hammer, P.T.C., Ramachandran, K., Clowes, R.M.Seismic imaging of thin, Diamondiferous kimberlite dykes8 Ikc Www.venuewest.com/8ikc/program.htm, Session 8, AbstractGlobalDiamond exploration - geophysics, seismics
DS200412-0773
2004
Hammer, P.T.C.Hammer, P.T.C., Clowes, R.M.Accreted terranes of northwestern British Columbia, Canada: lithospheric velocity structure and tectonics.Journal of Geophysical Research, Vol. 109, B6, 10.1029/2003 JB002749Canada, British ColumbiaGeophysics - seismics
DS200412-0774
2003
Hammer, P.T.C.Hammer, P.T.C., Clowes, R.M., Ramachandran, K.Seismic reflection techniques for imaging Diamondiferous kimberlite dykes: a case study from Snap Lake, N.W.T.Geological Association of Canada Annual Meeting, Abstract onlyCanada, Northwest TerritoriesGeophysics - seismics
DS200412-0775
2003
Hammer, P.T.C.Hammer, P.T.C., Ramachandran, K., Clowes, R.M.Seismic imaging of thin, Diamondiferous kimberlite dykes.8 IKC Program, Session 8, AbstractTechnologyDiamond exploration - geophysics, seismics
DS200512-0173
2004
Hammer, P.T.C.Clowes, R.M., Fernandez Viejo, G., Hammer, P.T.C., Welford, J.K.Lithospheric structure in northwestern Canada from lithoprobe P and S wave refraction profiles: a synthesis.Geological Society of America Annual Meeting ABSTRACTS, Nov. 7-10, Paper 112-9, Vol. 36, 5, p. 271.Canada, British Columbia, Yukon, Northwest territoriesGeophysics - seismics, R/WAR, Stikinia
DS200512-0395
2004
Hammer, P.T.C.Hammer, P.T.C., Clowes, R.M., Ramachandran, K.High resolution seismic reflection imaging of a thin, Diamondiferous dyke.Geophysics, Vol. 69, 5, pp. 1143-1154.Canada, Northwest TerritoriesGeophysics - seismics, Snap Lake
DS201012-0264
2010
Hammer, P.T.C.Hammer, P.T.C., Clowes, R.M., Cook, F.A., Van der Velden, A.J., Vasudevan, K.The lithoprobe trans continental lithospheric cross sections: imaging the internal structure of the North American continent.Canadian Journal of Earth Sciences, Vol. 47, 5, pp. 821-957.Canada, United StatesGeophysics - seismics
DS1997-0469
1997
Hammer, S.Hammer, S., Relf, C.Western Churchill Province: recent results, fresh perspectives, newinitiatives.Geological Survey of Canada Forum 1997 abstracts, p. 4. AbstractSaskatchewanCraton, Structure
DS2002-0645
2002
Hammerbeck, E.Hammerbeck, E., Frost-Killan, S.Topical aspects of the geotectonic and metallogenic evolution of Africa11th. Quadrennial Iagod Symposium And Geocongress 2002 Held Windhoek, Abstract p. 27.AfricaMagmatism - metallogeny, diamonds
DS1982-0405
1982
Hammerbeck, E.C.I.Martini, J.E.J., Hammerbeck, E.C.I., et al.Mineral Map of the Republics of South Africa, Transkei, Bophuthatswana, Venda and Ciskei and the Kingdoms of Lesotho And Swaziland.Department MINERAL AND ENERGY AFFAIRS, MAP 1:1, 1000, 000. 4 SHEETS.South Africa, Lesotho, Swaziland, Southern AfricaGeology, Mineral Resources, Diamonds
DS1992-0658
1992
Hammerbeck, E.C.I.Hammerbeck, E.C.I.Can minerals sustain prosperity for all?South African Journal of Geology, Vol. 95, No. 5-6, pp. 151-158GlobalEconomics, Mining industry
DS1998-0569
1998
Hammerbeck, E.C.I.Hammerbeck, E.C.I.Resource and reserve classificationSouth Africa Council, Handbook # 16, pp. 32-39.South AfricaEconomic geology, Ore reserves, geostatistics, legal
DS201612-2291
2016
Hammerli, J.Cook, Y.A., Sanislav, I.V., Hammerli, J., Blenkinsop, T.G., Dirks, P.H.G.M.A primitive mantle source for the Neoarchean mafic rocks from the Tanzania Craton.Geoscience Frontiers, Vol. 7, pp. 911-926.Africa, TanzaniaMantle

Abstract: Mafic rocks comprising tholeiitic pillow basalt, dolerite and minor gabbro form the basal stratigraphic unit in the ca. 2.8 to 2.6 Ga Geita Greenstone Belt situated in the NW Tanzania Craton. They outcrop mainly along the southern margin of the belt, and are at least 50 million years older than the supracrustal assemblages against which they have been juxtaposed. Geochemical analyses indicate that parts of the assemblage approach high Mg-tholeiite (more than 8 wt.% MgO). This suite of samples has a restricted compositional range suggesting derivation from a chemically homogenous reservoir. Trace element modeling suggests that the mafic rocks were derived by partial melting within the spinel peridotite field from a source rock with a primitive mantle composition. That is, trace elements maintain primitive mantle ratios (Zr/Hf = 32-35, Ti/Zr = 107-147), producing flat REE and HFSE profiles [(La/Yb)pm = 0.9-1.3], with abundances of 3-10 times primitive mantle and with minor negative anomalies of Nb [(Nb/La)pm = 0.6-0.8] and Th [(Th/La)pm = 0.6-0.9]. Initial isotope compositions (?Nd) range from 1.6 to 2.9 at 2.8 Ga and plot below the depleted mantle line suggesting derivation from a more enriched source compared to present day MORB mantle. The trace element composition and Nd isotopic ratios are similar to the mafic rocks outcropping ~50 km south. The mafic rocks outcropping in the Geita area were erupted through oceanic crust over a short time period, between ~2830 and ~2820 Ma; are compositionally homogenous, contain little to no associated terrigenous sediments, and their trace element composition and short emplacement time resemble oceanic plateau basalts. They have been interpreted to be derived from a plume head with a primitive mantle composition.
DS200612-1452
2006
Hammerschmidt, K.Upadhyay, D., Raith, M.M., Mezger, K., Hammerschmidt, K.Mesoproterozoic rift related alkaline magmatism at Elchuru, Prakasam alkaline province, SE India.Lithos, Vol. 89, 3-4, July pp. 447-477.IndiaBasanites, Tectonics, magmatism, Eastern Gnats Belt
DS1999-0224
1999
Hammerscmidt, K.Franz, G., Steiner, G., Hammerscmidt, K.Plume related alkaline magmatism in central Africa... the Meidob Hills ( Western Sudan).Chemical Geology, Vol. 157, No. 1-2, May 3, pp. 27-48.GlobalAlkaline rocks, Hotspot, plume
DS1992-0458
1992
Hammerscon, K.Fiechtner, L., Friedrcih, H., Hammerscon, K.Geochemistry and geochronology of early Mesozoic tholeiites from centralMoroccoGeologische Rundschau, Vol. 81, No. 1, pp. 45-62MoroccoTholeiites, Geochemistry
DS1990-0646
1990
Hammett, R.Hammett, R.Application of numerical modeling to mining in CanadaThe Canadian Institute of Mining, Metallurgy and Petroleum (CIM) Annual Meeting Paper preprint, No. 45, 8pGlobalMining, Stability problems
DS1995-0735
1995
Hammond, A.Hammond, A., et al.Environmental indicators: a systematic approach to measuring and reporting on environmental policy perforM.World resources Institute, 43pUnited StatesBook - ad, Environmental indicators
DS201112-0407
1999
Hammond, A.Hammond, A.Mineralogy of accessory phases in the Swartsruggens orangeite, South Africa.Thesis, 'BSc. Lakehead University, Africa, South AfricaThesis - note availability based on request to author
DS2002-0646
2002
Hammond, A.L.Hammond, A.L., Mitchell, R.H.Accessory mineralogy of orangeite from Swartruggens, South AfricaMineralogy and Petrology, Vol. 76, 1-2, pp. 1-19.South AfricaMineralogy, Deposit - Swartruggens
DS2002-0647
2002
Hammond, A.L.Hammond, A.L., Mitchell, R.H.Accessory mineralogy of orangeite from Swartruggens, South AfricaMineralogy and Petrology, Vol. 76, No. 1-2, pp. 1-19.South AfricaPetrology, Deposit - Swartzruggens
DS1940-0211
1949
Hammond, C.R.Hammond, C.R.Geologic Map and Structure Sections of East Flank of Laramie Range in the Vicinity of Iron Mountain, Albany and Laramiecounties.Msc. Thesis, University Wyoming, United States, Wyoming, Rocky MountainsRegional Studies
DS201901-0090
2018
Hammond, D. P.Witt, W.K., Hammond, D. P., Hughes, M.Geology of the Ngualla carbonatite complex, Tanzania, and origin of the weathered bastnaesite zone REE ore.Ore Geology Reviews, doi.org/10.1016/j.oregeorev.2018.12.002 65p. Africa, Tanzaniadeposit - Ngualla

Abstract: The late Mesoproterozoic Ngualla carbonatite complex in southwest Tanzania comprises a central magnesiocarbonatite plug surrounded sequentially by an annular calcite carbonatite intrusion and fenitised felsic igneous country rocks. The calcite carbonatite contains phlogopite-rich (glimmerite) enclaves interpreted as fenitised wallrock xenoliths that have contributed silicate minerals, apatite and magnetite through dispersal and interaction, mainly within the calcite carbonatite magma. Ultramafic magmas were emplaced into the magnesiocarbonatite magma chamber before complete solidification of the magnesiocarbonatite. Contemporaneity allowed the two magmas to mingle. Rounded enclaves of hematite-barite in the magnesiocarbonatite are tentatively attributed to magma immiscibility. Following complete solidification of the calcite carbonatite, and overlapping late crystallization of the magnesiocarbonatite plug, late magnesiocarbonatite dikes and ultramafic dikes were emplaced, some of the latter as diatremes. Crystallization of ferroan dolomite in the magnesiocarbonatite plug resulted in residual magmatic concentration of Si, Ba, F and rare earth elements (REE), and crystallization of barite, quartz, calcite, fluorite and REE fluorocarbonates in miarolitic cavities. Concentrations of (total) rare earth oxides (TREO) in the unweathered magnesiocarbonatite are 1 to 2%. REE ore with 3 to 6% TREO resulted from weathering, during which CaCO3 and MgCO3 were leached from ferroan dolomite leaving a porous goethite-rich residue containing barite and bastnaesite, the latter having replaced primary synchesite. Other commodities with potential economic significance include phosphate and niobium, both of which were enriched by residual accumulation over the calcite carbonatite as a result of karstic weathering. Although weathering was a critical factor in the formation of REE ore at Ngualla, the primary proto-ore resulted mainly from in situ igneous processes. This genetic model is different from that used to account for many carbonatite-hosted ore bodies, which result from late-stage hydrothermal processes. Examples of hydrothermal rare earth deposits include those of the late Jurassic to early Cretaceous Chilwa Province, located 800?km south of Ngualla. The differences in ore-forming processes may reflect the relative ages of the carbonatites and a deeper level of erosion at Ngualla.
DS201904-0799
2019
Hammond, D.P.Witt, W.K., Hammond, D.P., Hughes, M.Geology of the Ngualla carbonatite complex, Tanzania and origin of the weathered bastnaesite zone REE ore.Ore Geology Reviews, Vol. 105, pp. 28-54.Chinacarbonatite
DS1994-1681
1994
Hammond, D.R.Stagg, A.K., Hammond, D.R.Environmental site assessments in the acquisition of industrial mineralassetsAmerican Institute of Mining, Metallurgical, and Petroleum Engineers (AIME) Preprint, Meeting held Albuquerque Feb. 14-17th, No. 94-75, 8pUnited StatesMining -environmental, Industrials
DS2002-0648
2002
Hammond, E.C.Hammond, E.C.A sample examination of 'diamond carbonados'Eos, American Geophysical Union, Spring Abstract Volume, Vol.83,19, 1p.Central African RepublicGeophysics - magnetics, Diamond - morphology
DS200612-0525
2006
Hammond, G.P.Hammond, G.P.People, planet and prosperity: the determinants of humanity's environmental footprint.Natural Resources Forum, Vol. 30, 1, Feb pp. 27-36.GlobalSocial responsibility
DS1989-0579
1989
Hammond, I.Hammond, I.CRA -the Australian connectionEngineering and Mining Journal, Vol. 190, No. 6, August pp. 40-43AustraliaCompany profile -CRA., Economics
DS1986-0337
1986
Hammond, J.G.Hammond, J.G.Geochemistry and petrogenesis of Proterozoic diabase in the southern Death Valley region of CaliforniaContributions to Mineralogy and Petrology, Vol. 93, No. 3, pp. 312-321CaliforniaEclogite
DS201802-0232
2017
Hammond, J.O.S.Ebinger, C.J., Keir, D., Bastow, I.D., Whaler, K., Hammond, J.O.S., Miller, A.A., Tiberi, M.S., Hautot, S.Crustal structure of active deformation zones in Africa: implications for global crustal processes.Tectonics, Vol. 36, 10.1002/2017TC004526Africatectonics

Abstract: The Cenozoic East African rift (EAR), Cameroon Volcanic Line (CVL), and Atlas Mountains formed on the slow-moving African continent, which last experienced orogeny during the Pan-African. We synthesize primarily geophysical data to evaluate the role of magmatism in shaping Africa's crust. In young magmatic rift zones, melt and volatiles migrate from the asthenosphere to gas-rich magma reservoirs at the Moho, altering crustal composition and reducing strength. Within the southernmost Eastern rift, the crust comprises ~20% new magmatic material ponded in the lower crust and intruded as sills and dikes at shallower depths. In the Main Ethiopian Rift, intrusions comprise 30% of the crust below axial zones of dike-dominated extension. In the incipient rupture zones of the Afar rift, magma intrusions fed from crustal magma chambers beneath segment centers create new columns of mafic crust, as along slow-spreading ridges. Our comparisons suggest that transitional crust, including seaward dipping sequences, is created as progressively smaller screens of continental crust are heated and weakened by magma intrusion into 15-20 km thick crust. In the 30 Ma Recent CVL, which lacks a hot spot age progression, extensional forces are small, inhibiting the creation and rise of magma into the crust. In the Atlas orogen, localized magmatism follows the strike of the Atlas Mountains from the Canary Islands hot spot toward the Alboran Sea. CVL and Atlas magmatism has had minimal impact on crustal structure. Our syntheses show that magma and volatiles are migrating from the asthenosphere through the plates, modifying rheology, and contributing significantly to global carbon and water fluxes.
DS201807-1510
2018
Hammond, J.O.S.Magee, C., Stevenson, C.T.E., Ebmeier, S.K., Keir, D., Hammond, J.O.S., Gottsmann, J.H., Whaler, K.A., Schofield, N., Jackson, C.A-L., Petronis, M.S., O'Driscoll, B., Morgan, J., Cruden, A., Vollgger, S.A., Dering, G., Micklethwaite, S., Jackson, M.D.Magma plumbing systems: a geophysical perspective. InSAR, GPS, GNSS, FWI, UAVsJournal of Petrology, in press available, 99p.Mantlemagmatism - geophysics

Abstract: Over the last few decades, significant advances in using geophysical techniques to image the structure of magma plumbing systems have enabled the identification of zones of melt accumulation, crystal mush development, and magma migration. Combining advanced geophysical observations with petrological and geochemical data has arguably revolutionised our understanding of, and afforded exciting new insights into, the development of entire magma plumbing systems. However, divisions between the scales and physical settings over which these geophysical, petrological, and geochemical methods are applied still remain. To characterise some of these differences and promote the benefits of further integration between these methodologies, we provide a review of geophysical techniques and discuss how they can be utilised to provide a structural context for and place physical limits on the chemical evolution of magma plumbing systems. For example, we examine how Interferometric Synthetic Aperture Radar (InSAR), coupled with Global Positioning System (GPS) and Global Navigation Satellite System (GNSS) data, and seismicity may be used to track magma migration in near real-time. We also discuss how seismic imaging, gravimetry, and electromagnetic data can identify contemporary melt zones, magma reservoirs, and, or, crystal mushes. These techniques complement seismic reflection data and rock magnetic analyses that delimit the structure and emplacement of ancient magma plumbing systems. For each of these techniques, with the addition of full-waveform inversion (FWI), the use of Unmanned Aerial Vehicles (UAVs), and the integration of geophysics with numerical modelling, we discuss potential future directions. We show that approaching problems concerning magma plumbing systems from an integrated petrological, geochemical, and geophysical perspective will undoubtedly yield important scientific advances, providing exciting future opportunities for the volcanological community.
DS1992-0659
1992
Hammond, P.E.Hammond, P.E., Brunstead, K.A.Possible hotspot track in the Pacific northwestGeological Society of America (GSA) Abstract Volume, Vol. 24, No. 5, May p. 30. abstract onlyOregon, WashingtonHot spot, Geochemistry
DS200712-0407
2007
Hammond, S.J.Hammond, S.J., Parkinson, I.J., James, R.H., Rogers, N.W., Harvey, J.Delta 7 Li systematics of mantle xenoliths from Kilbourne Hole: unravelling metasomatic and differential processes.Plates, Plumes, and Paradigms, 1p. abstract p. A373.United States, New Mexico, Colorado PlateauMetasomatism
DS201212-0287
2012
Hammond, S.J.Harvey, J., Yoshikawa, M., Hammond, S.J., Burton, K.W.Deciphering the trace element characteristics in Kilbourne Hole peridotite xenoliths: melt-rock interaction and metasomatism beneath the Rio Grande rift, SW USA.Journal of Petrology, Vol. 53, 8, pp. 1709-1742.United StatesXenoliths
DS201412-0088
2014
Hammor, D.Caby, R., Bruguier, O., Fernandez, L., Hammor, D., Bosch, D., Mechati, M., Laouar, R., Ouabadi, A., Abdallah, N., Douchet, C.Metamorphic diamonds in a garnet megacryst from the Edough Massif (northeastern Algeria)… Recognition and geodynamic consequences.Tectonophysics, Vol. 637, pp. 341-353.Africa, AlgeriaEdough Massif
DS201709-1965
2017
Hammor, D.Bruguier, O., Bosch, D., Caby, R., Vitale-Brovarone, A., Fernadez, L., Hammor, D., Laouar, R., Ouabadi, A., Abdallah, N., Mechanti, M.Age of UHP metamorphism in the Western Mediterranean: insight from rutile and minute zircon inclusions in a diamond bearing garnet megacryst ( Edough Massif, NE Algeria).Earth and Planetary Science Letters, Vol. 474, pp. 215-225.Africa, Algeriadiamond inclusions

Abstract: Diamond-bearing UHP metamorphic rocks witness for subduction of lithospheric slabs into the mantle and their return to shallow levels. In this study we present U-Pb and trace elements analyses of zircon and rutile inclusions from a diamond-bearing garnet megacryst collected in a mélange unit exposed on the northern margin of Africa (Edough Massif, NE Algeria). Large rutile crystals (up to 300 µm in size) analyzed in situ provide a U-Pb age of 32.4 ± 3.3 Ma interpreted as dating the prograde to peak subduction stage of the mafic protolith. Trace element analyses of minute zircons (=30 µm) indicate that they formed in equilibrium with the garnet megacryst at a temperature of 740-810 °C, most likely during HP retrograde metamorphism. U-Pb analyses provide a significantly younger age of 20.7 ± 2.3 Ma attributed to exhumation of the UHP units. This study allows bracketing the age of UHP metamorphism in the Western Mediterranean Orogen to the Oligocene/early Miocene, thus unambiguously relating UHP metamorphism to the Alpine history. Exhumation of these UHP units is coeval with the counterclockwise rotation of the Corsica-Sardinia block and most likely resulted from subduction rollback that was driven by slab pull.
DS2001-0926
2001
Hammouda, T.Pin, C., Paquette, J.L., Moonchoux, P., Hammouda, T.First field scale occurrence of Silicon, Aluminum, Sodium rich low degree partial melts from the upper mantle.Journal of Geology, Vol. 29, No. 5, May, pp. 451-4.MantlePeridoite, glass inclusions, partial melts, uppermantle
DS2003-0545
2003
Hammouda, T.Hammouda, T.High pressure melting of carbonated eclogite and experimental constraints on carbonEarth and Planetary Science Letters, Vol. 214, 1-2, pp.357-68.MantleUHP, carbon
DS200412-0776
2003
Hammouda, T.Hammouda, T.High pressure melting of carbonated eclogite and experimental constraints on carbon recycling and storage in the mantle.Earth and Planetary Science Letters, Vol. 214, 1-2, pp.357-68.MantleUHP, carbon
DS200912-0146
2009
Hammouda, T.Dalou, C., Koga, K.T., Hammouda, T., Poitrasson, F.Trace element partitioning between carbonatitic melts and mantle transition zone minerals: implications for the source of carbonatites.Geochimica et Cosmochimica Acta, Vol. 73, 1, Jan. pp. 239-255.MantleCarbonatite
DS201012-0169
2010
Hammouda, T.Doucelance, R., Hammouda, T., Moreira, M., Martins, J.C.Geochemical constraints on depth of origin of oceanic carbonatites: The Cape Verde Case.Geochimica et Cosmochimica Acta, Vol. 74, 24, pp. 7261-7282.Europe, Cape Verde IslandsCarbonatite
DS201012-0265
2010
Hammouda, T.Hammouda, T., Chantel, J., Devidal, J-L.Apatite solubility in carbonatitic liquids and trace element partitioning between apatite and carbonatite at high pressure.Geochimica et Cosmochimica Acta, Vol. 74, 24, pp. 7220-7235.TechnologyCarbonatite
DS201112-0408
2011
Hammouda, T.Hammouda, T., Andrault, D., Koga, K., Katsura, T., Martin, M.Ordering in double carbonates and implications for processes at subduction.Contributions to Mineralogy and Petrology, Vol. 161, 3, pp. 439-450.MantleSubduction
DS201112-0646
2011
Hammouda, T.Martin, A.M., Hammouda, T.Role of iron and 6 GPa a potential mechanism for diamond formation during subduction.European Journal of Mineralogy, Vol. 23, 1, pp. 5-16.MantleDiamond genesis
DS201112-0647
2011
Hammouda, T.Martin, A.M., Hammouda, T.Role of iron and reducing conditions on the stability of dolomite + coesite between 4.25 and 6 GPa - a potential mechanism for diamond formation during subductionEuropean Journal of Mineralogy, Vol. 23, 1, pp. 5-16.MantleSubduction, diamond genesis
DS201212-0445
2012
Ham