Kaiser Bottom Fish OnlineFree trialNew StuffHow It WorksContact UsTerms of UseHome
Specializing in Canadian Stocks
SearchAdvanced Search
Welcome Guest User   (more...)
Home / Education
Education
 

SDLRC - Scientific Articles all years by Author - Q


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 - Q
Posted/
Published
AuthorTitleSourceRegionKeywords
DS201908-1815
2019
QShu, Q, Brey, G.P., Pearson, G., Liu, J., Gibson, S.A., Becker, H.The evolution of the Kaapvaal craton: a multi-isotopic perspective from lithospheric peridotites from Finsch diamond mine.Precambrian Research, 105380, 21p. PdfAfrica, South Africadeposit - Finsch

Abstract: Accurately dating the formation and modification of Earth’s sub-cratonic mantle still faces many challenges, primarily due to the long and complex history of depletion and subsequent metasomatism of this reservoir. In an attempt to improve this, we carried out the first study on peridotites from the Kaapvaal craton (Finsch Mine) that integrates results from Re-Os, Lu-Hf, Sm-Nd and Sr-isotope systems together with analyses of major-, trace- and platinum-group elements. The Finsch peridotites are well-suited for such a study because certain compositional features reflect they were highly depleted residues of shallow melting (1.5?GPa) at ambient Archean mantle temperatures. Yet, many of them have overabundant orthopyroxene, garnet and clinopyroxene compared to expected modal amounts for residues from partial melting. Finsch peridotites exhibit a wide range of rhenium depletion ages (TRD) from present day to 2.7?Ga, with a prominent mode at 2.5?Ga. This age overlaps well with a Lu-Hf isochron of 2.64?Ga (eHf (t)?=?+26) which records silico-carbonatitic metasomatism of the refractory residues. This late Archean metasomatism is manifested by positive correlations of Pt/Ir and Pd/Ir with 187Os/188Os ratios and good correlations of modal amounts of silicates, especially garnet, with Os isotope ratios. These correlations suggest that the Highly Siderophile Elements (HSE) and incompatible element reenrichment and modal metasomatism result from one single major metasomatic event at late Archean. Our detailed study of Finsch peridotites highlights the importance of using multiple isotopic systems, to constrain the ages of events defining the evolution of lithospheric mantle. The Re-Os isotope system is very effective in documenting the presence of Archean lithosphere, but only the oldest TRD ages may accurately date or closely approach the age of the last major partial melting event. For a meaningful interpretation of the Re-Os isotope systematics the data must be combined with HSE patterns, trace-element compositions and ideally other isotopic systems, e.g. Lu-Hf. This is highlighted by the widespread evidence in Finsch peridotites of Pt, Pd and Re enrichment through significant Base Metal Sulfide (BMS) addition (mainly in the range of 0.002-0.08?wt%) that systematically shifts the mode of TRD model ages to younger ages.
DS201012-0133
2010
Qas-Cohen, A.Cuthbert, S., Qas-Cohen, A., Ballentine, C., Burgess, R., Droop, G.Norwegian garnet websterites: analogues for mantle metasomatism?Goldschmidt 2010 abstracts, abstractEurope, NorwayMetasomatism
DS1990-1206
1990
QiQi, Qu, Taylor, L.A.Mantle eclogites as basaltic derivatives: xenoliths from alkali basalt, eastern ChinaGeological Society of America (GSA) Annual Meeting, Abstracts, Vol. 22, No. 7, p. A254ChinaEclogites, Xenoliths
DS1994-0991
1994
QiLawrence, Qu, Qi, Taylor, A., Sobolev, N.V.Eclogites from the Obnazhennaya kimberlite pipe, Yakutia, RussiaInternational Geology Review, Vol. 36, No. 10, Oct. 1, pp. 911-924.RussiaEclogites, petrology, Deposit - Obnazhennaya
DS200412-0320
2004
Qi, L.Cheng, X., Zhang, H., Huang, Z., Liu, C., Qi, L., Wenbo, L., Guan, T.Genesis of carbonatite syenite complex and REE deposit at Maoniuping, Sichuan Province, China: evidence from Pb isotope geochemiGeochemical Journal, Vol. 38, pp. 67-76.ChinaCarbonatite
DS200712-1194
2006
Qi, L.Xu, C., Campbell, I.H., Allen, C.M., Huang, Z., Qi, L., Zhang, H., Zhang, G.Flat rare earth element patterns as an indicator of cumulate processes in the Lesser Qinlin carbonatites, China.Geochimica et Cosmochimica Acta, In press availableChinaCarbonatite, REE geochemistry
DS200812-1280
2008
Qi, L.Xu, C., Qi, L., Huang, Z., Chen, Y., Yu, X., Wang, L., Li, E.Abundances and significance of platinum group elements in carbonatites from China.Lithos, in press available, 7p.ChinaCarbonatite
DS201012-0867
2010
Qi, L.Xu, C., Kynicky, J., Chamouradian, A.R., Qi, L., Wenlei, SongA unique Mo deposit associated with carbonatites in the Qinling orogenic belt, central China.Lithos, In press unformatted 46p. availableChinaCarbonatite
DS201412-0384
2014
Qi, L.Huang, X-W., Zhou, M.F., Qiu, Y-Z., Qi, L.In situ LA-ICP-MS trace element analyses of magnetite: the Bayan Obo Fe-REE-Nb deposit, north China.Ore Geology Reviews, Vol. 65, pp. 884-899.ChinaDeposit - Bayan Obo
DS201906-1340
2019
Qi, L.Qiao, X., Zhou, Z., Schwarz, D.T., Qi, L., Gao, J., Nong, P., Lai, M., Guo, K., Li, Y.Study of the differences in infrared spectra of emerald from different mining areas and the controlling factors.The Canadian Mineralogist, Vol. 57, pp. 65-79.Globalemerald genesis

Abstract: Natural emeralds from 11 mining areas were studied using an infrared spectrometer. The results showed different spectroscopic characteristics for emerald from different mine regions. Infrared absorption is mainly attributed to the vibration of Si-O lattice, channel water, alkaline cations, and molecules such as CO2, [Fe2(OH)4]2+, etc. Both near-infrared and mid-infrared spectra showed that the differences in band positions, intensities, and shapes are related to the mixed ratio of the two types of channel water. Accordingly, emerald and its mining regions can be divided into 3 types: H2O I, H2O II, and transition I-II. Furthermore, the study indicates that the relative amounts of the two different orientations of channel water molecules are mainly affected by the presence of (Mg + Fe)2+ in the host rock or in the mineralizing fluid. Therefore, the mineralization environment type (alkali-poor, alkali-rich, and transitional types) of emerald can be preliminarily identified from IR spectroscopy. This can be useful for determining the origin of emeralds.
DS202004-0502
2020
Qi, L.Cawood, P.A., Wang, W., Zhao, T., Xu, Y., Mulder, J.A., Pisarevsky, S.A., Zhang, L., Gan, C., He, H., Liu, H., Qi, L., Wang, Y., Yao, J., Zhao, G., Zhou, M-F., Zi, J-W.Deconstructing south China and consequences for reconstructing Nuna and Rodinia.Earth-Science Reviews, in press available, 70p. PdfChinatectonics

Abstract: Contrasting models for internal and external locations of South China within the Nuna and Rodinia supercontinents can be resolved when the current lithotectonic associations of Mesoproterozoic and older rocks units that constitute the craton are redefined into four lithotectonic domains: Kongling, Kunming-Hainan, Wuyi, and Coastal. The Kongling and Kunming-Hainan domains are characterized by isolated Archean to early Paleoproterozoic rock units and events and crop out in northern and southern South China, respectively. The Kunming-Hainan Domain is preserved in three spatially separated regions at Kunming (southwestern South China), along the Ailaoshan shear zone, and within Hainan Island. Both domains were affected by late Paleoproterozoic tectonothermal events, indicating their likely juxtaposition by this time to form the proto-Yangtze Block. Late Paleoproterozoic and Mesoproterozoic sedimentary and igneous rock units developed on the proto-Yangtze Block, especially in its southern portions, and help link the rock units that formed along the shear zone at Ailaoshan and on Hainan Island into a single, spatially unified unit prior to Paleozoic to Cenozoic structural disaggregation and translation. The Wuyi Domain consists of late Paleoproterozoic rock units within a NE-SW trending, fault-bounded block in eastern South China. The Coastal Domain lies east of the Wuyi domain and is inferred to constitute a structurally separate block. Basement to the domain is not exposed, but zircon Hf model ages from Mesozoic granites suggest Mesoproterozoic basement at depth. The Archean to Paleoproterozoic tectonothermal record of the Kongling and Kunming-Hainan domains corresponds closely with that of NW Laurentia, suggesting all were linked, probably in association with assembly and subsequent partial fragmentation of the Nuna supercontinent. Furthermore, the age and character of Mesoproterozoic magmatism and detrital zircon signature of sedimentary rocks in the proto-Yangtze Block matches well with western Laurentia and eastern Australia-Antarctica. In particular, the detrital zircon signature of late Paleoproterozoic to early Mesoproterozoic sedimentary units in the block (e.g. Dongchuan Group) share a similar age spectrum with the Wernecke Supergroup of northwest Laurentia. This, together with similarities in the type and age of Fe-Cu mineralization in the domain with that in eastern Australia-Antarctica, especially northeast Australia, suggests a location adjacent to northwest Laurentia, southern Siberia, and northeast Australia within the Nuna supercontinent. The timing and character of late Paleoproterozoic magmatic activity in the Wuyi domain along with age of detrital zircons in associated sedimentary rocks matches the record of northern India. During rifting between Australia-Antarctica and Laurentia in the late Mesoproterozoic, the proto-Yangtze Block remained linked to northeast Australia. During accretionary orogenesis in the early Neoproterozoic, the proto-Yangtze Block assembled with the Wuyi Domain along the northern margin of India. The Coastal domain likely accreted at this time forming the South China Craton. Displacement of the Hainan and Ailaoshan assemblages from southwest of the Kunming assemblage likely occurred in the Cenozoic with the activation of the Ailaoshan-Red River fault system but could have begun in the early to mid-Paleozoic based on evidence for tectonothermal events in the Hainan assemblage.
DS202101-0006
2020
Qi, L.Cui, D., Liao, Z., Qi, L., Zhong, Q., Zhou, Z.A study of emeralds from Davdar, north-western China.Journal of Gemology, Vol. 37, 4, pp. 374-392Chinaemerald

Abstract: At the Davdar mine in Xinjiang, north-western China, emeralds are hosted mainly by carbonate, quartz-carbonate and quartz veins cutting metasedimentary rocks, and are associated with minerals such as hematite, dolomite, quartz, orthoclase and albite. Sixteen rough emeralds obtained during the authors’ visit to the mining area in 2019 were studied by standard gemmolog-ical techniques and various spectroscopic methods (FTIR, Raman, UV-Vis-NIR and EPR), as well as LA-ICP-MS chemical analysis. The analysed samples were mostly coloured by Cr, and showed a wide range of Fe, V, Mg and alkali contents, along with relatively low Cs, Rb and Sc. UV-Vis-NIR spectra showed features at 370 nm (Fe3+), 430 nm (Cr3+ with contributions from V3+ and possibly Fe3+), 580-630 nm (Cr3+ and V3+), 638 and 683 nm (Cr3+), and 850 nm (Fe2+ and possibly Fe2+-Fe3+interactions). In addition, the more V-rich emeralds displayed a distinct V3+ absorption band at about 385-395 nm. Notably, the chemical composition of Davdar emeralds shows significant overlap with those from Panjshir, Afghanistan.
DS1985-0551
1985
Qi, L.C.Qi, L.C.Synthetic Diamond in Chin a ( a Review)Prog. Crystal, Vol. 11, No. 4, pp. 245-251. *stated in EnglishChinaDiamond Morphology
DS200412-2157
2004
Qi, L.Li.W.Xu, C., Zhang, H., Huang, Z., Liu, C., Qi, L.Li.W., Guan, T.Genesis of the carbonatite syenite complex and REE deposit at Maoniuping, Sichuan Province, China: evidence from Pb isotope geocGeochemical Journal, Vol. 38, pp. 67-76.China, SichuanGeochronology, carbonatite
DS1995-1533
1995
Qi, Q.Qi, Q., Taylor, L.A., Zhou, X.Petrology and geochemistry of mantle peridotite xenoliths from southeast ChinaJournal of Petrology, Vol. 36, No. 1, Feb. pp. 55-80.ChinaPeridotites
DS1996-1146
1996
Qi, Y.Qi, Y.Kimberlites in Fuxian, LiaoningInternational Geological Congress 30th Session Beijing, Abstracts, Vol. 2, p. 396.ChinaKimberlites, Deposit -Fuxian
DS201902-0280
2019
Qi, Y-H.Ionov, D.A., Qi, Y-H., Kang, J-T., Golovin, A.V., Oleinikov, O.B., Zheng, W., Anbar, A.D., Zhang, Z-F., Huang, F.Calcium isotopic signatures of carbonatite and silicate metasomatism, melt percolation and crustal recycling in the lithospheric mantle.Geochimica et Cosmochimica Acta, Vol. 248, pp. 1-13.Russia, Siberiacarbonatite

Abstract: Ca isotopes can be strongly fractionated at the Earth’s surface and thus may be tracers of subducted carbonates and other Ca-rich surface materials in mantle rocks, magmas and fluids. However, the d44/40Ca range in the mantle and the scope of intra-mantle isotope fractionation are poorly constrained. We report Ca isotope analyses for 22 mantle xenoliths: four basalt-hosted refractory peridotites from Tariat in Mongolia and 18 samples from the Obnazhennaya (Obn) kimberlite on the NE Siberian craton. Obn peridotites are Paleoproterozoic to Archean melting residues metasomatised by carbonate-rich and/or silicate melts including unique xenoliths that contain texturally equilibrated carbonates. d44/40Ca in 15 Obn xenoliths shows limited variation (0.74-0.97‰) that overlaps the value (0.94?±?0.05‰) inferred for the bulk silicate Earth from data on fertile lherzolites, but is lower than d44/40Ca for non-metasomatised refractory peridotites from Mongolia (1.10?±?0.03‰). Bulk d44/40Ca in four Obn peridotites containing metasomatic carbonates ranges from 0.81?±?0.08‰ to 0.83?±?0.06‰, with similar values in acid-leachates and leaching residues, indicating isotopic equilibration of the carbonates with host rocks. We infer that (a) metasomatism tends to decrease d44/40Ca values of the mantle, but its effects are usually limited (=0.3‰); (b) Ca isotopes cannot distinguish "carbonatite" and "silicate" types of mantle metasomatism. The lowest d44/40Ca value (0.56‰) was obtained for a phlogopite-bearing Obn peridotite with a very high Ca/Al of 8 suggesting that the greatest metasomatism-induced Ca isotope shifts may be seen in rocks initially low in Ca that experienced significant Ca input leading to high Ca/Al. Two Obn peridotites, a dunite (melt channel material) and a veined spinel wehrlite, have high d44/40Ca values (1.22‰ and 1.38‰), which may be due to isotope fractionation by diffusion during silicate melt intrusion and percolation in the host mantle. Overall, we find no evidence that recycling of crustal carbonates may greatly affect Ca isotope values in the global mantle or on a regional scale.
DS201903-0519
2018
Qi, Y-H.Ionov, D.A., Qi, Y-H., Kang, J-T., Golovin, A.V., Oleinikov, O.B., Zheng, W., Anbar, A.D., Zhang, Z-F., Huang, F.Calcium isotopic signatures of carbonatite and silicate metasomatism, melt percolation and crustal recyclying in the lithospheric mantle.Geochimica et Cosmochimica Acta, Vol. 248, pp. 1-13.Mantlecarbonatite

Abstract: Ca isotopes can be strongly fractionated at the Earth’s surface and thus may be tracers of subducted carbonates and other Ca-rich surface materials in mantle rocks, magmas and fluids. However, the d44/40Ca range in the mantle and the scope of intra-mantle isotope fractionation are poorly constrained. We report Ca isotope analyses for 22 mantle xenoliths: four basalt-hosted refractory peridotites from Tariat in Mongolia and 18 samples from the Obnazhennaya (Obn) kimberlite on the NE Siberian craton. Obn peridotites are Paleoproterozoic to Archean melting residues metasomatised by carbonate-rich and/or silicate melts including unique xenoliths that contain texturally equilibrated carbonates. d44/40Ca in 15 Obn xenoliths shows limited variation (0.74-0.97‰) that overlaps the value (0.94?±?0.05‰) inferred for the bulk silicate Earth from data on fertile lherzolites, but is lower than d44/40Ca for non-metasomatised refractory peridotites from Mongolia (1.10?±?0.03‰). Bulk d44/40Ca in four Obn peridotites containing metasomatic carbonates ranges from 0.81?±?0.08‰ to 0.83?±?0.06‰, with similar values in acid-leachates and leaching residues, indicating isotopic equilibration of the carbonates with host rocks. We infer that (a) metasomatism tends to decrease d44/40Ca values of the mantle, but its effects are usually limited (=0.3‰); (b) Ca isotopes cannot distinguish "carbonatite" and "silicate" types of mantle metasomatism. The lowest d44/40Ca value (0.56‰) was obtained for a phlogopite-bearing Obn peridotite with a very high Ca/Al of 8 suggesting that the greatest metasomatism-induced Ca isotope shifts may be seen in rocks initially low in Ca that experienced significant Ca input leading to high Ca/Al. Two Obn peridotites, a dunite (melt channel material) and a veined spinel wehrlite, have high d44/40Ca values (1.22‰ and 1.38‰), which may be due to isotope fractionation by diffusion during silicate melt intrusion and percolation in the host mantle. Overall, we find no evidence that recycling of crustal carbonates may greatly affect Ca isotope values in the global mantle or on a regional scale.
DS201904-0749
2019
Qi, YpH.Ionov, D.A., Qi, YpH., Kang, J-T., Golovin, A.V., Oleinkov, O.B., Zheng, W., Anbar, A.D., Zhang, Z-F., Huang, F.Calcium isotopic signatures of carbonatite and silicate metasomatism, melt percolation and crustal recycling in the lithospheric mantle.Geochimica et Cosmochimica Acta, Vol. 248, pp. 1-13.Mantle, Asia, Mongolia, Russia, Siberiametasomatism

Abstract: Ca isotopes can be strongly fractionated at the Earth’s surface and thus may be tracers of subducted carbonates and other Ca-rich surface materials in mantle rocks, magmas and fluids. However, the d44/40Ca range in the mantle and the scope of intra-mantle isotope fractionation are poorly constrained. We report Ca isotope analyses for 22 mantle xenoliths: four basalt-hosted refractory peridotites from Tariat in Mongolia and 18 samples from the Obnazhennaya (Obn) kimberlite on the NE Siberian craton. Obn peridotites are Paleoproterozoic to Archean melting residues metasomatised by carbonate-rich and/or silicate melts including unique xenoliths that contain texturally equilibrated carbonates. d44/40Ca in 15 Obn xenoliths shows limited variation (0.74-0.97‰) that overlaps the value (0.94?±?0.05‰) inferred for the bulk silicate Earth from data on fertile lherzolites, but is lower than d44/40Ca for non-metasomatised refractory peridotites from Mongolia (1.10?±?0.03‰). Bulk d44/40Ca in four Obn peridotites containing metasomatic carbonates ranges from 0.81?±?0.08‰ to 0.83?±?0.06‰, with similar values in acid-leachates and leaching residues, indicating isotopic equilibration of the carbonates with host rocks. We infer that (a) metasomatism tends to decrease d44/40Ca values of the mantle, but its effects are usually limited (=0.3‰); (b) Ca isotopes cannot distinguish “carbonatite” and “silicate” types of mantle metasomatism. The lowest d44/40Ca value (0.56‰) was obtained for a phlogopite-bearing Obn peridotite with a very high Ca/Al of 8 suggesting that the greatest metasomatism-induced Ca isotope shifts may be seen in rocks initially low in Ca that experienced significant Ca input leading to high Ca/Al. Two Obn peridotites, a dunite (melt channel material) and a veined spinel wehrlite, have high d44/40Ca values (1.22‰ and 1.38‰), which may be due to isotope fractionation by diffusion during silicate melt intrusion and percolation in the host mantle. Overall, we find no evidence that recycling of crustal carbonates may greatly affect Ca isotope values in the global mantle or on a regional scale.
DS1994-1202
1994
Qi, Z.Mingguo, Z., Bolin, C., Qi, Z., QingchenThe northern Dabie shan terrain: a possible Andean type arcInternational Geology Review, Vol. 36, No. 9, Sept. pp. 867-883.ChinaTectonics, Dabie Mountains, Dabie Shan
DS1994-1203
1994
Qi, Z.Mingguo, Z., Bolin, C., Qi, Z., Qingchen, W.The northern Dabie Shan Terrain: a possible Andean type arcInternational Geology Review, Vol. 36, No. 9, Sept. pp. 867-883ChinaTerrane, Arc -Andean
DS1995-0164
1995
QianBoerner, D.E., Kurtz, R.D., Craven, J.A., Rondenay, QianBuried Proterozoic foredeep under the Western Canada sedimentary basinGeology, Vol. 23, No. 4, April pp. 297-300Alberta, SaskatchewanGeophysics -electromagnetics, Precamrbian basement
DS201312-0960
2013
Qian, J.H.Wei, C.J., Qian, J.H., Tian, Z.L.Metamorphic evolution of medium temperatire ultra high pressure ( MT-UHP) eclogites from the South Dabie orogen, central China: an insight from phase equilibration temperatures modelling.Journal of Metamorphic Geology, Vol. 31, 7, pp. 755-774,ChinaUHP
DS2003-1120
2003
Qian, Q.Qian, Q., Chu, M.F., Chung, S.L., Lee, T.Y., Xiong, X.M.Was Triassic continental subduction solely responsible for the generation of MesozoicInternational Geology Review, Vol. 45, 7, July pp. 659-70.ChinaMagmatism - UHP
DS2003-1121
2003
Qian, Q.Qian, Q., Chu, M.-F., Chung, S.L., Tung, Y.L., Xiong, X.M.Was Triassic continental subduction soley responsible for the generation of MesozoicInternational Geology Review, Vol. 45, 7, July pp. 659-ChinaMagmatism, UHP
DS200412-1604
2003
Qian, Q.Qian, Q., Chu, M.F., Chung, S.L., Lee, T.Y., Xiong, X.M.Was Triassic continental subduction solely responsible for the generation of Mesozoic mafic magmas and mantle source enrichmentInternational Geology Review, Vol. 45, 7, July pp. 659-70.ChinaMagmatism - UHP
DS200412-1605
2003
Qian, Q.Qian, Q., Chung, S-L., Lee, T-Y., Wen, D.J.Mesozoic high Ba Sr granitoids from North China: geochemical characteristics and geological implications.Terra Nova, Vol. 15, pp. 272-278.ChinaUHP - Dabie Sulu orogen
DS200612-1115
2006
Qian, S.Qicheng, F., Jianli, S., Ping, X., Qian, S., Tuanhua, W.Si and alkali rich melt inclusions in minerals of mantle peridotites from eastern China: implications for lithospheric evolution.Science China Earth Sciences, Vol. 49, 1, Jan. pp. 43-49.ChinaPeridotite - melting
DS200812-0486
2008
Qian, X.Hou, G., Santosh, M., Qian, X., Lister, G.S., Li, J.Configuration of the Late Paleoproterozoic supercontinent Columbia: insights from radiating mafic dyke swarms.Gondwana Research, Vol. 14, pp. 395-409.Mantle, South America, ColombiaSupercontinents
DS1998-0871
1998
Qian, Y.Li, Y., Qian, Y., Zhou, G.A reproduction pyrolysis catalysis synthesis of diamondScience, Vol. 281, No. 5374, July 10, pp. 246-7.GlobalDiamond - synthetic
DS2003-0846
2003
Qian, Y.Low, Z., Chen, Q., Wang, W., Qian, Y., Zhang, Y.Growth of large diamond crystals by reduction of magnesium carbonate with metallicAngewandte Chemie, GlobalBlank
DS200412-1179
2003
Qian, Y.Low, Z., Chen, Q., Wang, W., Qian, Y., Zhang, Y.Growth of large diamond crystals by reduction of magnesium carbonate with metallic sodium.Angewandte Chemie, Vol. 165, 37, Sept. 29, pp. 4639-41.TechnologyDiamond morphology
DS201806-1261
2018
Qian, Y.Zhang, W., Zou, G., Qian, Y.Application of rocking-scan method to detect the low- content diamonds in a complex mixture.Diamond and Related Materials, Vol. 85, pp. 1-4.Technologyrocking-scan

Abstract: A method for detecting large-size diamonds with low content in a complex mixture was described. Phase identification via conventional X-ray diffraction method is unsuitable because of the large-size and low-content characteristics of the diamonds. Thus, we proposed a convenient approach (i.e., rocking scan) for assessing the presence of low-content diamonds in a complex mixture. A thorough rocking scan of the (111), (220), and (311) planes revealed the presence of low-content diamonds prepared by reducing dense carbon dioxide with alkali metals. This procedure can be successfully applied to several standard mixture samples prepared by mixing a-SiO2, a-Al2O3, graphite, and pure diamond powders, which are commercially available. We estimated that the detection limit was at or below the 0.1?wt% level by using the proposed method under the current condition. This method is straightforward, routinized, and may be specifically developed to satisfy the requirements of public and private institutions for a rapid identification of other mixture phases, of which the large-size and low-content characteristics do not allow an instant phase identification by conventional X-ray diffraction methods.
DS1994-1419
1994
Qianli XieQianli Xie, Kerrich, R.Silicate-perovskite and majorite signature komatiites from Archean Abitibi Greenstone beltJournal of Geophysical Research, Vol. 99, B8, August 10, pp. 15, 799-812QuebecMantle magmatism, differentiation, stratification, Abitibi greenstone belt
DS201906-1340
2019
Qiao, X.Qiao, X., Zhou, Z., Schwarz, D.T., Qi, L., Gao, J., Nong, P., Lai, M., Guo, K., Li, Y.Study of the differences in infrared spectra of emerald from different mining areas and the controlling factors.The Canadian Mineralogist, Vol. 57, pp. 65-79.Globalemerald genesis

Abstract: Natural emeralds from 11 mining areas were studied using an infrared spectrometer. The results showed different spectroscopic characteristics for emerald from different mine regions. Infrared absorption is mainly attributed to the vibration of Si-O lattice, channel water, alkaline cations, and molecules such as CO2, [Fe2(OH)4]2+, etc. Both near-infrared and mid-infrared spectra showed that the differences in band positions, intensities, and shapes are related to the mixed ratio of the two types of channel water. Accordingly, emerald and its mining regions can be divided into 3 types: H2O I, H2O II, and transition I-II. Furthermore, the study indicates that the relative amounts of the two different orientations of channel water molecules are mainly affected by the presence of (Mg + Fe)2+ in the host rock or in the mineralizing fluid. Therefore, the mineralization environment type (alkali-poor, alkali-rich, and transitional types) of emerald can be preliminarily identified from IR spectroscopy. This can be useful for determining the origin of emeralds.
DS200912-0858
2009
Qiao, Y.Zhao, Z., Xiong, X., Wang, Q., Bai, Z., Qiao, Y.Late Paleozoic underplating in North Xinjiang: evidence from shoshonites and adakites.Gondwana Research, Vol. 18, 2, pp. 216-226.ChinaShoshonite
DS200612-1116
2006
QichengQicheng, Fan, Sui Jianli, Ping Xu, Li Ni, Sun Qian, Wang TuanhuaSi and alkali rich melt inclusions in minerals of mantle peridotites from eastern China: implications for lithospheric evolution.Science China Earth Sciences, Vol. 49, 1, pp. 43-49.ChinaPeridotite, tectonics, melting
DS200612-1115
2006
Qicheng, F.Qicheng, F., Jianli, S., Ping, X., Qian, S., Tuanhua, W.Si and alkali rich melt inclusions in minerals of mantle peridotites from eastern China: implications for lithospheric evolution.Science China Earth Sciences, Vol. 49, 1, Jan. pp. 43-49.ChinaPeridotite - melting
DS2003-1568
2003
Qicheng FanZou, H.,Reid, M.R., Yongshun Liu, Yupeng Yao, Xisheng Xu, Qicheng FanConstraints on the origin of historic potassic basalts from northeast Chin a by U ThChemical Geology, Vol. 200, 1-2, Oct. 16, pp. 189-201.ChinaPhlogopite garnet bearing peridotite, melting, metasoma
DS200412-2239
2003
Qicheng FanZou, H.,Reid, M.R., Yongshun Liu, Yupeng Yao, Xisheng Xu, Qicheng FanConstraints on the origin of historic potassic basalts from northeast Chin a by U Th disequilibrium data.Chemical Geology, Vol. 200, 1-2, Oct. 16, pp. 189-201.ChinaPhlogopite garnet bearing peridotite, melting, metasoma
DS1987-0148
1987
QidongDeng, QidongFeatures of active faults and crustal and upper mantle structures inChinaGeological Society of America, Vol. 19, No. 7 annual meeting abstracts, p.640. abstracChinaTectonics
DS1996-1147
1996
Qidong, D.Qidong, D., et al.Paleoseismology of the northern piedmont Tien Shan Mountains, northwesternChina.Journal of Geophysical Research, Vol. 101, No. B3, March 10, pp. 5895-20.ChinaGeophysics -seismics, Tienshan Mountains
DS1989-1190
1989
Qidong DengPeizhen Zhang, Burchfiel, B.C., Shefa Chen, Qidong DengExtinction of pull-apart basinsGeology, Vol. 17, No. 9, September pp. 814-817ChinaBasins, Tectonics
DS1990-0447
1990
Qijia ZangEnami, M., Qijia ZangQuartz pseudomorphs after coesite in eclogites from Shandong province, east ChinaAmerican Mineralogist, Vol. 75, No. 3-4, March-April pp. 381-386ChinaEclogites, Deposit -Rongchen, Zhuchen
DS1992-1243
1992
Qijian RenQijian RenMetallogenesis series in relation to volcanic activities of Mesozoic shoshonite series in eastern ChinaProceedings of the 29th International Geological Congress. Held Japan August 1992, Vol. 2, abstract p. 742ChinaShoshonites
DS202101-0041
2020
Qin, J-Y.Wang, Y-F., Qin, J-Y., Soustelle, V., Zhang, J-F., Xu, H-J.Pyroxene does not always preserve its source hydrogen concentration: clues from peridotite xenoliths. Geochimica et Cosmochimica Acta, in press availabe 38p. PdfChinametasomatism

Abstract: Water is key to many geodynamical processes in the Earth's upper mantle, yet its preservation in mantle minerals is still debated. To throw some light on this problem, we here carried out an integrated study of whole-rock and mineral chemistry, and hydrogen concentrations in olivine, orthopyroxene, and clinopyroxene within 18 spinel lherzolite samples from three localities (Lianshan, Panshishan, and Tashan) in the Nanjing area, eastern China. Whole-rock and mineral compositions suggest that the studied peridotite samples interacted with melt at different melt/rock ratios following various degrees of partial melting (up to 11%). Fourier transform infrared (FTIR) measurements show that olivine is almost dry (<1 wt ppm H2O) while the cores of orthopyroxene and clinopyroxene contain 14-151 wt ppm H2O and 41-218 wt ppm H2O, respectively. Profile analyses of >70 orthopyroxene grains, which are homogeneous in major-element compositions, covering all the studied samples show hydrogen-depleted rims, indicative of hydrogen diffusional loss. This hydrogen zonation is probably caused by hydrogen chemical diffusion controlled by the mobility of trivalent cations (most likely Al3+) in response to magma degassing or partial melting of peridotite during ascent, or interactions of peridotite with melt, or a combination of these processes. By contrast, no hydrogen zonation is observed in clinopyroxene. Based upon the comparison of chemical compositions (especially Fe and AlIV contents) of clinopyroxene within our samples with those in diffusion experiments, it is inferred that the hydrogen diffusivity in clinopyroxene should be larger than that in orthopyroxene from our samples. This inference points to that clinopyroxene within the studied samples must have experienced diffusional loss of hydrogen as well, suggesting that water concentrations in the lithospheric mantle beneath the study area are probably underestimated. Furthermore, it also implies that orthopyroxene instead of clinopyroxene most likely preserves the in-situ water concentrations at depth, at least at its core. The absence of hydrogen zonation in clinopyroxene can be attributed to its fine-grained nature and fast hydrogen diffusivity. Our FTIR data also show that Lianshan and Tashan samples have water concentration ratio between clinopyroxene and orthopyroxene (RCpx/Opx) of ~2, similar to mantle xenoliths from eastern China and other localities worldwide, yet Panshishan samples have higher RCpx/Opx values (2.3-5.9). Since hydrogen loss is suggested for both pyroxenes, RCpx/Opx of ~2 thus cannot be taken as a reliable indicator of preservation of original water concentration of mantle source and equilibrium partitioning of hydrogen between pyroxene, as opposed to previous suggestions.
DS201012-0764
2010
Qin, K.Su, B., Zhang, H., Tang, Y., Chisonga, B., Qin, K., Ying, J., Sakyi, P.A.Geochemical syntheses among the cratonic, off-cratonic and orogenic garnet peridotites and their tectonic implications.International Journal of Earth Sciences, In press available, 21p.MantlePeridotite, geochemistry
DS201012-0765
2010
Qin, K-Z.Su, B-X., Zhang, H-F., Sakyi, P.A., Yang, Y-H., Ying, J-F., Tang, Y-J., Qin, K-Z., Xiao, Y., Zhao, Mao, MaThe origin of spongy texture in minerals of mantle xenoliths from the western Qinling, central China.Contributions to Mineralogy and Petrology, in press available, 18p.ChinaXenoliths
DS201012-0766
2010
Qin, K-Z.Su, B-X., Zhang, H-F., Sakyi, P.A., Ying, J-F., Tang, Y-J., Yang, Y-H., Qin, K-Z., Xiao, Y., Zhao, X-M.Compositionally stratified lithosphere and carbonatite metasomatism recorded in mantle xenoliths from the Western Qinling (Central China).Lithos, Vol. 116, pp. 111-128.ChinaCarbonatite
DS201704-0653
2017
Qin, L.Xia, J., Qin, L., Shen, J., Carlson, R.W., Ionov, D.A., Mock, T.D.Chromium isotope heterogeneity in the mantle.Earth and Planetary Science Letters, Vol. 464, pp. 103-115.MantleGeochronology

Abstract: To better constrain the Cr isotopic composition of the silicate Earth and to investigate potential Cr isotopic fractionation during high temperature geological processes, we analyzed the Cr isotopic composition of different types of mantle xenoliths from diverse geologic settings: fertile to refractory off-craton spinel and garnet peridotites, pyroxenite veins, metasomatised spinel lherzolites and associated basalts from central Mongolia, spinel lherzolites and harzburgites from North China, as well as cratonic spinel and garnet peridotites from Siberia and southern Africa. The d53CrNIST 979 values of the peridotites range from -0.51±0.04‰-0.51±0.04‰ (2SD) to +0.75±0.05‰+0.75±0.05‰ (2SD). The results show a slight negative correlation between d53Cr and Al2O3 and CaO contents for most mantle peridotites, which may imply Cr isotopic fractionation during partial melting of mantle peridotites. However, highly variable Cr isotopic compositions measured in Mongolian peridotites cannot be caused by partial melting alone. Instead, the wide range in Cr isotopic composition of these samples most likely reflects kinetic fractionation during melt percolation. Chemical diffusion during melt percolation resulted in light Cr isotopes preferably entering into the melt. Two spinel websterite veins from Mongolia have extremely light d53Cr values of -1.36±0.04‰-1.36±0.04‰ and -0.77±0.06‰-0.77±0.06‰, respectively, which are the most negative Cr isotopic compositions yet reported for mantle-derived rocks. These two websterite veins may represent crystallization products from the isotopically light melt that may also metasomatize some peridotites in the area. The d53Cr values of highly altered garnet peridotites from southern Africa vary from -0.35±0.04‰-0.35±0.04‰ (2SD) to +0.12±0.04‰+0.12±0.04‰ (2SD) and increase with increasing LOI (Loss on Ignition), reflecting a shift of d53Cr to more positive values by secondary alteration.
DS202012-2242
2020
Qin, L.Qin, L., Yang, C.Magnetotelluric soundings on a stratified Earth with two transitional layers.Pure and Applied Physics, Vol. 177, pp. 5263-5274.Mantlegeophysics - magnetics

Abstract: Theoretical magnetotelluric (MT) soundings are investigated for a stratified (five-layered) Earth model consisting of two transitional layers with conductivity varying linearly with depth, and three homogeneous layers with constant conductivity. The analytical expressions for the tangential electric and magnetic fields as well as the surface impedance are derived in terms of Airy functions. The effect of the thicknesses of the two transitional layers and the interlayer between them on the MT responses (apparent resistivity and impedance phase) is examined in detail.
DS201711-2521
2017
Qin, L-P.Kang, J-T, Ionov, D.A., Liu, F., Zhang, C-L., Golovin, A.V., Qin, L-P., Zhang, Z-F., Huang, F.Calcium isotopic fractionation in mantle peridotites by melting and metasomatism and Ca isotope composition of the Bulk Silicate Earth.Earth and Planetary Science Letters, Vol. 474, pp. 128-137.Mantleperidotites

Abstract: To better constrain the Ca isotopic composition of the Bulk Silicate Earth (BSE) and explore the Ca isotope fractionation in the mantle, we determined the Ca isotopic composition of 28 peridotite xenoliths from Mongolia, southern Siberia and the Siberian craton. The samples are divided in three chemical groups: (1) fertile, unmetasomatized lherzolites (3.7-4.7 wt.% Al2O3); (2) moderately melt-depleted peridotites (1.3-3.0 wt.% Al2O3) with no or very limited metasomatism (LREE-depleted cpx); (3) strongly metasomatized peridotites (LREE-enriched cpx and bulk rock) further divided in subgroups 3a (harzburgites, 0.1-1.0% Al2O3) and 3b (fertile lherzolites, 3.9-4.3% Al2O3). In Group 1, d44/40Ca of fertile spinel and garnet peridotites, which experienced little or no melting and metasomatism, show a limited variation from 0.90 to 0.99‰ (relative to SRM 915a) and an average of 0.94 ± 0.05‰ (2SD, ), which defines the Ca isotopic composition of the BSE. In Group 2, the d44/40Ca is the highest for three rocks with the lowest Al2O3, i.e. the greatest melt extraction degrees (average ‰, i.e. ~0.1‰ heavier than the BSE estimate). Simple modeling of modal melting shows that partial melting of the BSE with ranging from 0.10 to 0.25 can explain the Group 2 data. By contrast, d44/40Ca in eight out of nine metasomatized Group 3 peridotites are lower than the BSE estimate. The Group 3a harzburgites show the greatest d44/40Ca variation range (0.25-0.96‰), with d44/40Ca positively correlated with CaO and negatively correlated with Ce/Eu. Chemical evidence suggests that the residual, melt-depleted, low-Ca protoliths of the Group 3a harzburgites were metasomatized, likely by carbonate-rich melts/fluids. We argue that such fluids may have low (=0.25‰) d44/40Ca either because they contain recycled crustal components or because Ca isotopes, similar to trace elements and their ratios, may be fractionated by kinetic and/or chromatographic effects of melt percolation in the mantle. The d44/40Ca in Group 3b lherzolites (0.83-0.89‰) are lower than in the BSE as well, but the effects of metasomatism on d44/40Ca are smaller, possibly because of the high Ca contents in their protoliths and/or smaller d44/40Ca differences between the protoliths and metasomatic agents. The BSE estimates based on fertile peridotites in this study fall in the d44/40Ca ranges for oceanic and continental basalts, various meteorites (achondrites; carbonaceous, ordinary and enstatite chondrites), Mars, and the Moon. These results provide benchmarks for the application of Ca isotopes to planet formation, mantle evolution, and crustal recycling.
DS201012-0054
2010
Qin, R.Bialas, R.W., Buck, W.R., Qin, R.How much magma is required to rift a continent?Earth and Planetary Science Letters, Vol. 292, 1-2, pp. 68-78.MantleMagmatism
DS201412-0717
2014
Qin, S.Qin, S., Qiu, Z., Lu, T., Chen, H., Sun, Y., Wang, Q., Zhang, J., Lil, L.Inclusions of diamonds from Hunan, the Yangtze Craton and their revealing for forming environment.Goldschmidt Conference 2014, 1p. AbstractChinaDiamond genesis
DS201703-0403
2017
Qin, S.Gao, J., Niu, J., Qin, S., Wu, X.Ultradeep diamonds originate from deep subducted sedimentary carbonates.Science China Earth Sciences, Vol. 60, 2, pp. 207-217.TechnologySubduction

Abstract: Diamonds are renowned as the record of Earth’s evolution history. Natural diamonds on the Earth can be distinguished in light of genetic types as kimberlitic diamonds (including peridotitic diamonds and eclogitic diamonds), ultrahigh-pressure metamorphic diamonds and ophiolitic diamonds. According to the inclusion mineralogy, most diamonds originated from continental lithospheric mantle at depths of 140-250 km. Several localities, however, yield ultradeep diamonds with inclusion compositions that require a sublithospheric origin (>~250 km). Ultradeep diamonds exhibit distinctions in terms of carbon isotope composition, N-concentration, mineral inclusions and so on. The present study provides a systematic compilation concerning the features of ultradeep diamonds, based on which to expound their genesis affinity with mantle-carbonate melts. The diamond-parental carbonate melts are proposed to be stemmed from the Earth’s crust through subduction of oceanic lithosphere. Ultradeep diamonds are classified into a subgroup attaching to kimberlitic diamonds grounded by formation mechanism, and present connections in respect of carbon origin to eclogitic diamonds, ultrahigh-pressure metamorphic diamonds and ophiolitic diamonds.
DS201706-1071
2016
Qin, S.Gao, J., Niu, J.J., Qin, S., Wu, X.Ultradeep diamonds originate from deep subducted sedimentary carbonates.Science China Earth Sciences, 12p. * engMantlesubduction, carbon cycle

Abstract: Diamonds are renowned as the record of Earth’s evolution history. Natural diamonds on the Earth can be distinguished in light of genetic types as kimberlitic diamonds (including peridotitic diamonds and eclogitic diamonds), ultrahigh-pressure metamorphic diamonds and ophiolitic diamonds. According to the inclusion mineralogy, most diamonds originated from continental lithospheric mantle at depths of 140-250 km. Several localities, however, yield ultradeep diamonds with inclusion compositions that require a sublithospheric origin (>~250 km). Ultradeep diamonds exhibit distinctions in terms of carbon isotope composition, N-concentration, mineral inclusions and so on. The present study provides a systematic compilation concerning the features of ultradeep diamonds, based on which to expound their genesis affinity with mantle-carbonate melts. The diamond-parental carbonate melts are proposed to be stemmed from the Earth’s crust through subduction of oceanic lithosphere. Ultradeep diamonds are classified into a subgroup attaching to kimberlitic diamonds grounded by formation mechanism, and present connections in respect of carbon origin to eclogitic diamonds, ultrahigh-pressure metamorphic diamonds and ophiolitic diamonds.
DS201707-1325
2016
Qin, S.Gao, J., Niu, J., Qin, S., Wu, X.Ultradeep diamonds originate from deep subducted sedimentary carbonates.Science China Earth Sciences, Vol. 60, 2, 3p.MantleUHP

Abstract: Diamonds are renowned as the record of Earth’s evolution history. Natural diamonds on the Earth can be distinguished in light of genetic types as kimberlitic diamonds (including peridotitic diamonds and eclogitic diamonds), ultrahigh-pressure metamorphic diamonds and ophiolitic diamonds. According to the inclusion mineralogy, most diamonds originated from continental lithospheric mantle at depths of 140–250 km. Several localities, however, yield ultradeep diamonds with inclusion compositions that require a sublithospheric origin (>~250 km). Ultradeep diamonds exhibit distinctions in terms of carbon isotope composition, N-concentration, mineral inclusions and so on. The present study provides a systematic compilation concerning the features of ultradeep diamonds, based on which to expound their genesis affinity with mantle-carbonate melts. The diamond-parental carbonate melts are proposed to be stemmed from the Earth’s crust through subduction of oceanic lithosphere. Ultradeep diamonds are classified into a subgroup attaching to kimberlitic diamonds grounded by formation mechanism, and present connections in respect of carbon origin to eclogitic diamonds, ultrahigh-pressure metamorphic diamonds and ophiolitic diamonds.
DS201807-1540
2018
Qin, S.Zhang, L., Smyth, J.R., Kawazoe, T., Jacobsen, S.D., Qin, S.Transition metals in the transition zone: partitioning of Ni, Co, and Zn between olivine, wadsleyite, ringwoodite, and clineoenstatite.Contributions to Mineralogy and Petrology, 10.1007/ s00410-018-1478-x 10p.Mantlemelting

Abstract: Ni, Co, and Zn are widely distributed in the Earth’s mantle as significant minor elements that may offer insights into the chemistry of melting in the mantle. To better understand the distribution of Ni2+, Co2+, and Zn2+ in the most abundant silicate phases in the transition zone and the upper mantle, we have analyzed the crystal chemistry of wadsleyite (Mg2SiO4), ringwoodite (Mg2SiO4), forsterite (Mg2SiO4), and clinoenstatite (Mg2Si2O6) synthesized at 12-20 GPa and 1200-1400 °C with 1.5-3 wt% of either NiO, CoO, or ZnO in starting materials. Single-crystal X-ray diffraction analyses demonstrate that significant amounts of Ni, Co, and Zn are incorporated in octahedral sites in wadsleyite (up to 7.1 at%), ringwoodite (up to 11.3 at%), olivine (up to 2.0 at%), and clinoenstatite (up to 3.2 at%). Crystal structure refinements indicate that crystal field stabilization energy (CFSE) controls both cation ordering and transition metal partitioning in coexisting minerals. According to electron microprobe analyses, Ni and Co partition preferentially into forsterite and wadsleyite relative to coexisting clinoenstatite. Ni strongly prefers ringwoodite over coexisting wadsleyite with DRw/WdNi?=?4.13. Due to decreasing metal-oxygen distances with rising pressure, crystal field effect on distribution of divalent metal ions in magnesium silicates is more critical in the transition zone relative to the upper mantle. Analyses of Ni partitioning between the major upper-mantle phases implies that Ni-rich olivine in ultramafic rocks can be indicative of near-primary magmas.
DS201907-1589
2019
Qin, T.Zhang, Z., Qin, T., Pommier, A., Hirschmann, M.M.Carbon storage in Fe-Ni-S liquids in the deep upper mantle and its relation to diamond and Fe-Ni alloy precipitation.Earth and Planetary Science Letters, Vol. 520, pp. 164-174.Mantlediamond genesis

Abstract: To better understand the role of sulfide in C storage in the upper mantle, we construct a thermodynamic model for Fe-Ni-S-C sulfide melts and consider equilibrium between sulfide melts, mantle silicates, Fe-Ni alloy, and diamond. The sulfide melt model is based upon previous parameterization of Fe-Ni-S melts calibrated at 100 kPa, which we have extended to high pressure based on volumetric properties of end-member components. We calculate the behavior of C in the sulfide melt from empirical parameterization of experimental C solubility data. We calculate the continuous compositional evolution of Fe-Ni sulfide liquid and associated effects on carbon storage at pressure and redox conditions corresponding to mantle depths of 60 to 410 km. Equilibrium and mass balance conditions were solved for coexisting Fe-Ni-S melt and silicate minerals (olivine [(Mg,Fe,Ni)2SiO4], pyroxene [(Mg,Fe)SiO3]) in a mantle with 200 ppmw S. With increasing depth and decreasing oxygen fugacity (fO2), the calculated melt (Fe+Ni)/S atomic ratio increases from 0.8-1.5 in the shallow oxidized mantle to 2.0-10.5 in the reduced deep upper mantle (>8 GPa), with Fe-Ni alloy saturation occurring at >10 GPa. Compared to previous calculations for the reduced deep upper mantle, alloy saturation occurs at greater depth owing to the capacity of sulfide melt to dissolve metal species, thereby attenuating the rise of Fe and Ni metal activities. The corresponding carbon storage capacity in the metal-rich sulfide liquid rises from negligible below 6 GPa to 8-20 ppmw at 9 GPa, and thence increases sharply to 90-110 ppmw at the point of alloy saturation at 10-12 GPa. The combined C storage capacity of liquid and solid alloy reaches 110-170 ppmw at 14 GPa. Thus, in the deep upper mantle, all carbon in depleted sources (10-30 ppmw C) can be stored in the sulfide liquid, and alloy and sulfide liquids host a significant fraction of the C in enriched sources (30-500 ppmw C). Application of these results to the occurrences of inferred metal-rich sulfide melts in the Fe-Ni-S-C system and inclusions in diamonds from the mantle transition zone suggests that oxidization of a reduced metal-rich sulfide melt is an efficient mechanism for deep-mantle diamond precipitation, owing to the strong effect of (Fe+Ni)/S ratio on carbon solubility in Fe-Ni-S melts. This redox reaction likely occurs near the boundary between oxidized subducted slabs and the reduced ambient peridotitic mantle.
DS202003-0362
2020
Qin, W.Sha, X., Yue, W., Zhang, H., Qin, W., She, D., Wang, C.Thermal stability of polycrystalline diamond compact sintered with boron coated diamond particles.Diamond & Related Materials, in press available, 34p. PdfGlobalboron

Abstract: The polycrystalline diamond compact (PDC), which consists of a polycrystalline diamond layer on a tungsten carbide (WC)/cobalt (Co) substrate, is extensively utilized as drilling bits. However, the poor thermal stability due to the graphitization and oxygen susceptibility of diamond severely limits the application of PDCs to high-temperature drilling work. In this study, a new PDC with improved thermal stability is successfully synthesized with boron (B)-coated diamond particles, which forms a uniform boron carbide (B4C) barrier. The as-received B4C phase acts as a protective barrier, which enhances the initial graphitization and oxidizing temperatures to 800 °C and 780 °C, respectively, which are ~100 °C and ~30 °C higher than those (700 °C and 750 °C) of the PDC sintered with uncoated diamond particles. The B4C barrier protects diamond grains from direct contact with the Co phase, prohibiting the cobalt-catalytic graphitization. In addition, the oxidation of the B4C barrier occurs prior to that of the diamond grains, which inhibits the PDC from oxidation.
DS200912-0605
2009
Qin, Y.Qin, Y., Capdeville, Y., Montagner, J.P., Boschi, L., Becker, T.W.Reliability of mantle tomography models assessed by spectral element simulation.Geophysical Journal International, Vol. 177, 1, pp. 125-144.MantleTomography
DS202101-0044
2021
Qin, Y.Zhang, M., Wang, C., Zhang, Qi., Qin, Y., Shen, J., Hu, X., Zhou, G., Li, S.Temporal-spatial analysis of alkaline rocks based in GEOROC. Not specific to diamondsApplied Geochemistry, Vol. 124, 104853 8p. PdfAsia, TibetGEOROC
DS201412-0960
2014
Qin, Z-W.Wang, H., Wu, Y-B., Gao, S., Zheng, J-P., Liu, Q., Liu, X-C., Qin, Z-W., Yang, S-H., Gong, H-J.Deep subduction of continental crust in accretionary orogen: evidence from U-Pb dating on diamond-bearing zircons from the Qinling orogen, central China.Lithos, Vol. 190-191, pp. 420-429.ChinaUHP
DS1990-1635
1990
Qin ShuyingZhou Xiuzhong, Huang Yunhaui, Qin Shuying, Deng Chujun, Gao Yan, YangStudies on the type and the typomorphic characteristics of the garnets From kimberlites and the relationship between the garnets and diamondInternational Mineralogical Association Meeting Held June, 1990 Beijing China, Vol. 1, extended abstract p. 141-142ChinaMineralogy -garnets, Diamond morphology
DS1991-1932
1991
Qin ShuyingZhou Xiouzhong, Huang Yunhui, Qin Shuying, Gao Yan, Yang JianminTypes, typomorphic characteristics of garnet from kimberlites in Shandong and Liaoning and its relationship with diamond.*CHIYanshi Kuangwuxue Zazhi (Acta Petrologica et Mineralogica)*CHI, Vol. 10, No. 3, August pp. 252-264ChinaPetrology, Garnets from kimberlites
DS1999-0080
1999
Qinchen, W.Bolin, C., Qinchen, W., Minguo, Z.New dat a regarding hotly debated topics concerning ultra high pressure (UHP) metamorphism of the Dabie Sulu belt, east central ChinaInternational Geology Review, Vol. 41, No. 9, Sept. pp. 827-35.ChinaMetamorphism - ultra high pressure (UHP), Dabie - Sulu belt
DS1996-0855
1996
Qing, M.Liu, G., Zhai, L., Qing, M., Wang. X., Che, F.Magma melt inclusions in diamondsInternational Geological Congress 30th Session Beijing, Abstracts, Vol. 2, p. 397.ChinaDiamond inclusions, Deposit -Fuxian, Mengyin, Dingiagang
DS1994-1202
1994
QingchenMingguo, Z., Bolin, C., Qi, Z., QingchenThe northern Dabie shan terrain: a possible Andean type arcInternational Geology Review, Vol. 36, No. 9, Sept. pp. 867-883.ChinaTectonics, Dabie Mountains, Dabie Shan
DS1994-1203
1994
Qingchen, W.Mingguo, Z., Bolin, C., Qi, Z., Qingchen, W.The northern Dabie Shan Terrain: a possible Andean type arcInternational Geology Review, Vol. 36, No. 9, Sept. pp. 867-883ChinaTerrane, Arc -Andean
DS1995-0711
1995
Qingchen WangHacker, 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
DS200612-0207
2006
Qingguo, Z.Cai, L., Qingguo, Z., Yonsheng, D., Xiaopeng, H.Discovery of eclogite and its geological significance in Qiantang central Tibet.Chinese Science Bulletin, Vol. 51, 9, May pp. 1095-1100.China, TibetEclogite, tectonics
DS2003-0951
2003
Qinglong, Z.Mingbao, P., Qinglong, Z., Huafu, L., Huogen, C., Shouju, C., Shipeng, Z.The discovery of diamond from the Zhimafang pyrope peridotite of the Sulu UHPActa Geologica Sinica, Vol. 77, 3, pp. 332-7.ChinaUHP- deposit Sulu
DS200412-1319
2003
Qinglong, Z.Mingbao, P., Qinglong, Z., Huafu, L., Huogen, C., Shouju, C., Shipeng, Z.The discovery of diamond from the Zhimafang pyrope peridotite of the Sulu UHP metamorphic zone, East Chin a and its geological imActa Geologica Sinica, Vol. 77, 3, pp. 332-7.ChinaUHP- deposit Sulu
DS1999-0575
1999
Qing-Ren meng, G.W. Zhang.Qing-Ren meng, G.W. Zhang.Timing of collision of the North and South Chin a blocks: controversy andreconciliation.Geology, Vol. 27, No. 2, Feb. pp. 123-6.ChinaQinling Orogen, Tectonics
DS1991-0400
1991
Qingrun, M.Drew, L.J. , Qingrun, M., Weijun, S.The geology of the Bayan Obo iron rare earths niobium deposits, InnerMongolia, ChinaAmerican Institute of Mining, Metallurgical, and Petroleum Engineers (AIME), Meeting to be held Feb. 25-28th. Denver, Colorado, AbstractChinaCarbonatite, Rare earths
DS2003-1012
2003
Qingsong, F.Nicheng, S., Wenji, B., Zhesheng, M., Qingsong, F., Ming, X., Binggang, Y.An x ray diffraction study of an inclusion in diamond from the Luobusha chromiteActa Geologica Sinica, Vol. 77, 3, pp. 326-331.ChinaDiamond - inclusion
DS200412-1433
2003
Qingsong, F.Nicheng, S., Wenji, B., Zhesheng, M., Qingsong, F., Ming, X., Binggang, Y., Mingquan, D., Jingsui, Y.An x ray diffraction study of an inclusion in diamond from the Luobusha chromite deposit in Tibet, China.Acta Geologica Sinica, Vol. 77, 3, pp. 326-331.ChinaDiamond - inclusion
DS1991-0401
1991
Qinrun, M.Drew, L.J., Qinrun, M., Weijun, S.The geology of the Bayan Obo iron-rare earth-niobium deposits, innerMongolia, ChinaAmerican Institute of Mining, Metallurgical, and Petroleum Engineers (AIME) Preprint, No. 91-10, 14pChinaCarbonatite, Deposit -Bauan Obo
DS1995-0445
1995
Qinrun, M.Drew, L.J., Qinrun, M.Large scale structural geological setting of the Bayan Obo iron rare earth elements (REE)deposit, China.Global Tectonics and Metallogeny, Vol. 5, No. 1-2, Oct. pp. 33-36.China, MongoliaCarbonatite, rare earth elements (REE)., Deposit -Bayan Obo
DS2000-1047
2000
QiuZhang, Min, Suddaby, P., O'Reilly, S.Y., Norman, M., QiuNature of lithospheric mantle beneath the eastern part of Central Asian fold belt: mantle xenolith evidence.Tectonophysics, Vol. 328, no, 1-2 Dec.20, pp.131-56.GlobalXenoliths, Geochemistry
DS200612-1529
2006
Qiu, H.N.Wijbrans, J.R., Qiu, H.N.Dabie Shan UHP garnets dated by 40 Ar 39 Ar stepwise crushing: more early Paleozoic ages.Geochimica et Cosmochimica Acta, Vol. 70, 18, p. 21, abstract only.ChinaUHP, geochronology
DS200612-1117
2006
Qiu, H-N.Qiu, H-N., Wijbrans, J.R.Paleozoic ages and excess 40 Ar in garnets from the Bixiling eclogite in DabieShan, China: new insights from 40Ar 39Ar dating by stepwise crushing.Geochimica et Cosmochimica Acta, In pressAsia, ChinaUHP, geochronology
DS201911-2555
2019
Qiu, K.Qiu, K., Yu, H., Wu, M., Geng, J., Ge, X., Gou, Z., Taylor, R.D.Discrete Zr and REE mineralization of the Baerzhe rare metal deposit, China.American Mineralogist, Vol. 104, pp. 1487-1502.ChinaREE

Abstract: Although REE (lanthanides + Sc + Y) mineralization in alkaline silicate systems is commonly accompanied with Zr mineralization worldwide, our understanding of the relationship between Zr and REE mineralization is still incomplete. The Baerzhe deposit in Northeastern China is a reservoir of REE, Nb, Zr, and Be linked to the formation of an Early Cretaceous, silica-saturated, alkaline intrusive complex. In this study, we use in situ laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS) analyses of zircon and monazite crystals to constrain the relationship between Zr and REE mineralization at Baerzhe. Three groups of zircon are identified and are differentiated based upon textural observations and compositional characteristics. Type Ia zircons display well-developed oscillatory zoning. Type Ib zircons are darker in cathodoluminescence images and have more irregular zoning and resorption features than type Ia zircons. In addition, type Ib zircons can locally occur as overgrowths on type Ia zircons. Type II zircons contain irregular but translucent cores and rims with oscillatory zoning that are murky brown in color and occur in aggregates. Textural features and compositional data suggest that types Ia and Ib zircon crystallized at the magmatic stage, with type Ia being least-altered and type Ib being strongly altered. Type II zircons, on the other hand, precipitated during the magmatic to magmatichydrothermal transition. Whereas the magnitude of the Eu anomaly is moderate in the barren alkaline granite, both magmatic and deuteric zircon exhibit pronounced negative anomalies. Such features are difficult to explain exclusively by feldspar fractionation and could indicate the presence of fluid induced modification of the rocks. Monazite crystals occur mostly through replacement of zircon and sodic amphibole; monazite clusters are also present. Textural and compositional evidence suggests that monazite at Baerzhe is hydrothermal. Types Ia and Ib magmatic zircon yield 207Pb-corrected 206Pb/238U ages of 127.2 ± 1.3 and 125.4 ± 0.7 Ma, respectively. Type II deuteric zircon precipitated at 124.9 ± 0.6 Ma. The chronological data suggest that the magmatic stage of the highly evolved Baerzhe alkaline granite lasted less than two million years. Hydrothermal monazite records a REE mineralization event at 122.8 ± 0.6 Ma, approximately 1 or 2 million years after Zr mineralization. We therefore propose a model in which parental magmas of the Baerzhe pluton underwent extensive magmatic differentiation while residual melts interacted with aqueous hydrothermal fluids. Deuteric zircon precipitated from a hydrosilicate liquid, and subsequent REE mineralization, exemplified by hydrothermal monazite, correlates with hydrothermal metasomatic alteration that postdated the hydrosilicate liquid event. Such interplay between magmatic and hydrothermal processes resulted in the formation of discrete Zr and REE mineralization at Baerzhe.
DS201905-1086
2019
Qiu, T.Wu, W., Yang, J., Wirth, R., X=Zheng, J., Lian, D., Qiu, T., Milushi, I.Carbon and nitrogen isotopes and mineral inclusions in diamonds from chromitites of the Mirdita ophiolite ( Albania) demonstrate recycling of oceanic crust into the mantle.American Mineralogist, Vol. 104, pp. 485-500.Europe, Albaniadiamond inclusions

Abstract: Geophysical investigations and laboratory experiments provide strong evidence for subduction of ancient oceanic crust, and geological and mineralogical observations suggest that subducted oceanic crust is recycled into the upper mantle. This model is supported by some direct petrologic and miner-alogical evidence, principally the recovery of super-deep diamonds from kimberlites and the presence of crustal materials in ophiolitic chromitites and peridotites, but many details are still unclear. Here we report the discovery of ophiolite-hosted diamonds in the podiform chromitites of the Skenderbeu massif of the Mirdita ophiolite in the western part of Neo-Tethys. The diamonds are characterized by exceedingly light C isotopes (d13CPDB ~ -25‰), which we interpret as evidence for subduction of organic carbon from Earth's surface. They are also characterized by an exceptionally large range in d 15Nair (-12.9‰ to +25.5‰), accompanied by a low N aggregation state. Materials sparsely included in diamonds include amorphous material, Ni-Mn-Co alloy, nanocrystals (20 × 20 nm) of calcium silicate with an orthorhombic perovskite structure (Ca-Pv), and fluids. The fluids coexisting with the alloy and Ca-Pv provide clear evidence that the diamonds are natural rather than synthetic. We suggest that the Skenderbeu diamonds nucleated and grew from a C-saturated, NiMnCo-rich melt derived from a subducted slab of ocean crust and lithosphere in the deep mantle, at least in the diamond stability field, perhaps near the top of the mantle transition zone. The subsequent rapid upward transport in channeled networks related to slab rollback during subduction initiation may explain the formation and preservation of Skenderbeu diamonds. The discovery of diamonds from the Mirdita ophiolite not only provides new evidence of diamonds in these settings but also provides a valuable opportunity to understand deep cycling of subducted oceanic crust and mantle composition.
DS201909-2109
2019
Qiu, T.Yang, J., Lian, D., Robinson, P.T., Qiu, T., Xiong, F., Wu, W.A shallow origin for diamonds in ophiolitic chromitites. Geology, Vol. 47, pp. e475.North America, Mexicomicrodiamonds
DS201412-0384
2014
Qiu, Y-Z.Huang, X-W., Zhou, M.F., Qiu, Y-Z., Qi, L.In situ LA-ICP-MS trace element analyses of magnetite: the Bayan Obo Fe-REE-Nb deposit, north China.Ore Geology Reviews, Vol. 65, pp. 884-899.ChinaDeposit - Bayan Obo
DS201212-0423
2012
Qiu, Z.Lu, T.,Chen, H., Qiu, Z., Zhang, J., Wei, R., Ke, J., Sunagawa, I.,Stern, R., Stachel, T.Multiple core growth structure and nitrogen abundances of diamond crystals from Shandong and Liaoning kimberlite pipes, China.European Journal of Mineralogy, Vol. 24, 4, pp. 651-656.ChinaDeposit - Shandong, Liaonging
DS201412-0377
2014
Qiu, Z.Hsu, T., Lucas, A., Qiu, Z., Li, M.,Yu, Q.Exploring the Chinese gem and jewelry industry.Gems & Gemology, Vol. 50, 1, Spring, pp. 2-29.ChinaGemstones - economics
DS201412-0717
2014
Qiu, Z.Qin, S., Qiu, Z., Lu, T., Chen, H., Sun, Y., Wang, Q., Zhang, J., Lil, L.Inclusions of diamonds from Hunan, the Yangtze Craton and their revealing for forming environment.Goldschmidt Conference 2014, 1p. AbstractChinaDiamond genesis
DS201809-2065
2018
Qiu, Z.Lu, T., Ke, J., Qiu, Z.Surface dissolution features and contact twinning in natural diamonds. ( macle)Neues Jahrbuch fur Mineralogie, Vol. 195, pp. 145-153.Australiadeposit - Argyle

Abstract: Contact twinning with the so-called "macle" form or other shapes are often found in natural diamond crystals. However, the surface microtopographic features associated with twinning have been less investigated. Here, the surface dissolution and growth features seen on the twin boundaries, including the re-entrant angles revealed by differential interference contrast microscope and SEM techniques in 170 natural diamond crystals mainly from Argle mine, Australia are described and summarized. The hexagonal pits, rhombic pits along with higher symmetry observed at the twin boundaries together with dislocations and their formation processes are discussed.
DS201112-0594
2011
Qiu, Z-L.Li, Q., Wu, F-Y., Li, X-H., Qiu, Z-L., Yang, Y-H., Tang, G-Q.Precisely dating Paleozoic kimberlites in the North Chin a craton and Hf isotopic constraints on the evolution of the subcontinental lithospheric mantle.Lithos, Vol. 126, pp. 127-134.ChinaMengyin, Fuxian
DS201112-0595
2011
Qiu, Z-L.Li, Q-L., Wu, F-Y., Li, X-H., Qiu, Z-L., Liu, Y., Yang, Y-H., Tang, G-Q.Precise age determin ation of the Paleozoic kimberlites in North Chin a craton and Hf isotopic constraint on the evolution of its subcontinental lithospheric mantle.Goldschmidt Conference 2011, abstract p.1316.ChinaMengyin, Fuxian
DS201912-2835
2019
Qiu-Li, L.Yang, Y-H., Wu, F-Y., Qiu-Li, L., Rojas-Agramonte, Y., Yang, J-H., Yang, L., Ma, Q., Xie, L-W., Huang, C., Fan, H-R., Zhao, Z-F., Xu, C.In situ U-Th-Pb dating and Sr-Nd isotope analysis of bastnasite by LA-(MC)-ICP-MS.Geostandards and Geoanalltical Research, Vol. 43, 3, pp. 543-565.China, Europe, Sweden, Asia, Mongolia, United States, Africa, Malawi, MadagascarREE

Abstract: Bastnäsite is the end member of a large group of carbonate-fluoride minerals with the common formula (REE) CO3F•CaCO3. This group is generally widespread and, despite never occurring in large quantities, represents the major economic light rare earth element (LREE) mineral in deposits related to carbonatite and alkaline intrusions. Since bastnäsite is easily altered and commonly contains inclusions of earlier-crystallised minerals, in situ analysis is considered the most suitable method to measure its U-Th-Pb and Sr-Nd isotopic compositions. Electron probe microanalysis and laser ablation (multi-collector) inductively coupled plasma-mass spectrometry of forty-six bastnäsite samples from LREE deposits in China, Pakistan, Sweden, Mongolia, USA, Malawi and Madagascar indicate that this mineral typically has high Th and LREE and moderate U and Sr contents. Analysis of an in-house bastnäsite reference material (K-9) demonstrated that precise and accurate U-Th-Pb ages could be obtained after common Pb correction. Moreover, the Th-Pb age with its high precision is preferable to the U-Pb age because most bastnäsites have relatively high Th rather than U contents. These results will have significant implications for understanding the genesis of endogenous ore deposits and formation processes related to metallogenic geochronology research.
DS1996-1148
1996
Qixin, T.Qixin, T., Rihui, L.Provenances and concentrations contraints of littoral placer deposits inChinaJournal of Problems theory sed. rock Formation, Vol. 31, No. 6, Nov-Dec pp. 518-523ChinaAlluvials, placers, Gold
DS1992-1244
1992
Qj QuQj Qu, Taylor, L.A.Petrology and geochemistry of mantle xenoliths from southeast ChinaGeological Society of America (GSA) Abstracts with programs, 1992 Annual, Vol. 24, No. 7, abstract p. A84ChinaGeochemistry, Xenoliths
DS201412-0381
2014
Q-KHuang, J-X., Li, P., Griffin, W.L., Xia, Q-K, Greau, Y., Pearson, N.J., O'Reilly, S.Y.Water contents of Roberts Victor xenolithic eclogites: primary and metasomatic controls.Contributions to Mineralogy and Petrology, Vol. 168, pp. 1092-1095Africa, South AfricaDeposit - Roberts Victor
DS201502-0063
2014
Q-KHuang, J-X., Li, P., Griffin, W.L., Xia, Q-K, Greau, Y., Pearson, N.J., O'Reilly, S.Y.Water contents of Roberts Victor xenolithic eclogites: primary and metasomatic controls.Contributions to Mineralogy and Petrology, Vol. 168, pp. 1092-1105.Africa, South AfricaDeposit - Roberts Victor
DS200512-0909
2005
Qopoto, C.Rohrbach, A., Schuth, S., Ballhaus, C., Munker, C., Matveev, S., Qopoto, C.Petrological constraints on the origin of arc picrites, New Georgia Solomon Islands.Contributions to Mineralogy and Petrology, Vol. 149, 6, pp. 685-712.Asia, Solomon IslandsPicrite
DS2000-0652
2000
Q-RMeng, Q-R, Zhang, G-W.Geologic framework and tectonic evolution of the Qinling orogen, central China.Tectonophysics, Vol. 323, No.3-4, Aug, pp.183-96.ChinaTectonics, Orogeny
DS1990-1206
1990
QuQi, Qu, Taylor, L.A.Mantle eclogites as basaltic derivatives: xenoliths from alkali basalt, eastern ChinaGeological Society of America (GSA) Annual Meeting, Abstracts, Vol. 22, No. 7, p. A254ChinaEclogites, Xenoliths
DS1994-0991
1994
QuLawrence, Qu, Qi, Taylor, A., Sobolev, N.V.Eclogites from the Obnazhennaya kimberlite pipe, Yakutia, RussiaInternational Geology Review, Vol. 36, No. 10, Oct. 1, pp. 911-924.RussiaEclogites, petrology, Deposit - Obnazhennaya
DS2002-1720
2002
Qu, G.Windley, B.F., Kroner, A., Guo, J., Qu, G., Li, Y., Zhang, C.Neoproterozoic to Paleozoic geology of the Altai Orogen NW China: new zircon age dat a and tectonic evolution.Journal of Geology, Vol. 110, 6, pp. 719-738.ChinaGeochronology
DS200612-1573
2006
Qu, J.Yongliang, A., Lifei, Z., Li, X., Qu, J.Geochemical characteristics and tectonic implications of HP UHP eclogites and blueschists in southwestern Tian Shan China.Progress in Natural Science, Vol. 16, 6, June pp. 624-632.ChinaUHP
DS201804-0746
2018
Qu, S.Su, S-H., Uang, Y., Qu, S., Liu, R., Li, L.Microdiamond/PLA ( Polylactic acid) composites with enhanced thermal conductivity through improving filler/matrix interface compatibility.Diamond & Related Materials, Vol. 81, pp. 161-167.Technologymicrodiamonds

Abstract: Polylactic acid (PLA)-based composites filled with 20 or 50 µm-diameter microdiamond are synthesized by hot pressing. Through improving the interface compatibility between the filler and the matrix enabled by octadecylamine (ODA) coating on the microdiamond particles, the maximum thermal conductivity of the composites is 2.22 Wm- 1 K- 1, which is a ~ 10-fold increase in comparison with that of pure PLA. According to the analysis on the glass transmission of the composites and the surface chemistry of the fillers using DSC, FI-IR, and Raman microscopy, it is found out that ODA is connected with the -OH group on the microdiamond surface through hydrogen bonding and an interfacial structure of PLA/ODA/microdiamond is formed. Thus, the interfacial thermal transport between PLA and microdiamond is significantly improved, leading to the enhancement of the thermal conductivity of the composites. Our work presents a simple method to modify the surface chemistry of microdiamond and to improve the interface compatibility between microdiamond and PLA. The microdiamond/PLA composites with large thermal conductivity are promising thermal management materials used for modern electronic products.
DS201811-2618
2019
Qu, Y.Xie, Y., Qu, Y., Zhong, R., Verplanck, P.L., Meffre, S., Xu, D.The ~1.85 Ga carbonatite in north China and its implications on the evolution of the Columbia supercontinent.Gondwana Research, Vol. 65, pp. 125-141.Chinacarbonatite

Abstract: Mantle-derived carbonatites provide a unique window in the understanding of mantle characteristics and dynamics, as well as insight into the assembly and breakup of supercontinents. As a petrological indicator of extensional tectonic regimes, Archean/Proterozoic carbonatites provide important constraints on the timing of the breakup of ancient supercontinents. The majority of the carbonatites reported worldwide are Phanerozoic, in part because of the difficulty in recognizing Archean/Proterozoic carbonatites, which are characterized by strong foliation and recrystallization, and share broad petrologic similarities with metamorphosed sedimentary lithologies. Here, we report the recognition of a ~1.85?Ga carbonatite in Chaihulanzi area of Chifeng in north China based on systematic geological, petrological, geochemical, and baddeleyite U-Pb geochronological results. The carbonatite occurs as dikes or sills emplaced in Archean metasedimentary rocks and underwent intense deformation. Petrological and SEM/EDS results show that calcite and dolomite are the dominant carbonate minerals along with minor and varied amounts of Mg-rich mafic minerals, including forsterite (with Fo?>?98), phlogopite, diopside, and an accessory amount of apatite, baddeleyite, spinel, monazite, and ilmenite. The relatively high silica content together with the non-arc and OIB-like trace element signatures of the carbonatite indicates a hot mantle plume as the likely magma source. The depleted Nd isotopic signatures suggest that plume upwelling might be triggered by the accumulation of recycled crust in the deep mantle. As a part of the global-scale Columbia supercontinent, the Proterozoic tectonic evolution of the North China Craton (NCC) provides important insights into the geodynamics governing amalgamation and fragmentation of the supercontinent. The Paleo-Mesoproterozoic boundary is the key point of tectonic transition from compressional to extensional settings in the NCC. The newly identified ~1.85?Ga carbonatite provides a direct link between the long-lasting supercontinental breakup and plume activity, which might be sourced from the “slab graveyard,” continental crustal slabs subducted into asthenosphere, beneath the supercontinent. The carbonatite provides a precise constraint of the initiation of the continental breakup at ~1.85?Ga.
DS201812-2900
2019
Qu, Y.Xie, Y., Qu, Y., Zhong, R., Verplanck, P.L., Meffre, S., Xu, D.The ~1/85 carbonatite in north China and its implications on the evolution of the Columbia supercontinent.Gondwana Research, Vol. 65, pp. 125-141.Chinacarbonatite

Abstract: Mantle-derived carbonatites provide a unique window in the understanding of mantle characteristics and dynamics, as well as insight into the assembly and breakup of supercontinents. As a petrological indicator of extensional tectonic regimes, Precambrian carbonatites provide important constraints on the timing of the breakup of ancient supercontinents. The majority of the carbonatites reported worldwide are Phanerozoic, in part because of the difficulty in recognizing Precambrian carbonatites, which are characterized by strong foliation and recrystallization, and share broad petrologic similarities with metamorphosed sedimentary lithologies. Here we report the recognition of a ~1.85?Ga carbonatite in Chaihulanzi area of Chifeng in north China based on systematic geological, petrological, geochemical, and baddeleyite U-Pb geochronological results. The carbonatite occurs as dikes or sills emplaced in Archean metasedimentary rocks and underwent intense deformation. Petrological and SEM/EDS results show that calcite and dolomite are the dominant carbonate minerals along with minor and varied amounts of Mg-rich mafic minerals, including forsterite (with Fo?>?98), phlogopite, diopside, and an accessory amount of apatite, baddeleyite, spinel, monazite, and ilmenite. The relatively high silica content together with the non-arc and OIB-like trace element signatures of the carbonatite indicates a hot mantle plume as the likely magma source. The depleted Nd isotopic signatures suggest that plume upwelling might be triggered by the accumulation of recycled crust in the deep mantle. As a part of the global-scale Columbia supercontinent, the Proteozoic tectonic evolution of the North China Craton (NCC) provides important insights into the geodynamics governing amalgamation and fragmentation of the supercontinent. The Paleo-Mesoproterozoic boundary is the key point of tectonic transition from compressional to extensional settings in the NCC. The newly-identified ~1.85?Ga carbonatite provides a direct link between the long-lasting supercontinental breakup and plume activity, which might be sourced from the “slab graveyard”, continental crustal slabs subducted into asthenosphere, beneath the supercontinent. The carbonatite provides a precise constraint of the initiation of the continental breakup at ~1.85?Ga.
DS201901-0092
2018
Qu, Y.Xie, Y., Qu, Y., Zhong, R., Verplanck, P.L., Meffre, S., Xu, D.The ~1.85 GA carbonatite in north China and its implications on the evolution of the Columbia supercontinent. Chaitulanzi, ChifengGondwana Research, Vol. 65, pp. 135-141.Chinacarbonatite

Abstract: Mantle-derived carbonatites provide a unique window in the understanding of mantle characteristics and dynamics, as well as insight into the assembly and breakup of supercontinents. As a petrological indicator of extensional tectonic regimes, Precambrian carbonatites provide important constraints on the timing of the breakup of ancient supercontinents. The majority of the carbonatites reported worldwide are Phanerozoic, in part because of the difficulty in recognizing Precambrian carbonatites, which are characterized by strong foliation and recrystallization, and share broad petrologic similarities with metamorphosed sedimentary lithologies. Here we report the recognition of a ~1.85?Ga carbonatite in Chaihulanzi area of Chifeng in north China based on systematic geological, petrological, geochemical, and baddeleyite U-Pb geochronological results. The carbonatite occurs as dikes or sills emplaced in Archean metasedimentary rocks and underwent intense deformation. Petrological and SEM/EDS results show that calcite and dolomite are the dominant carbonate minerals along with minor and varied amounts of Mg-rich mafic minerals, including forsterite (with Fo?>?98), phlogopite, diopside, and an accessory amount of apatite, baddeleyite, spinel, monazite, and ilmenite. The relatively high silica content together with the non-arc and OIB-like trace element signatures of the carbonatite indicates a hot mantle plume as the likely magma source. The depleted Nd isotopic signatures suggest that plume upwelling might be triggered by the accumulation of recycled crust in the deep mantle. As a part of the global-scale Columbia supercontinent, the Proteozoic tectonic evolution of the North China Craton (NCC) provides important insights into the geodynamics governing amalgamation and fragmentation of the supercontinent. The Paleo-Mesoproterozoic boundary is the key point of tectonic transition from compressional to extensional settings in the NCC. The newly-identified ~1.85?Ga carbonatite provides a direct link between the long-lasting supercontinental breakup and plume activity, which might be sourced from the “slab graveyard”, continental crustal slabs subducted into asthenosphere, beneath the supercontinent. The carbonatite provides a precise constraint of the initiation of the continental breakup at ~1.85?Ga.
DS1990-1207
1990
Qu QiQu Qi, Taylor, L.S.Unusual mantle xenoliths from southeast ChinaInternational Mineralogical Association Meeting Held June, 1990 Beijing China, Vol. 2, extended abstract p. 821-822ChinaMantle, Basalts -xenoliths
DS1994-1420
1994
Qu QiQu Qi, Beard, B.L.Geochemistry and petrology of Al-augite group mantle xenoliths Tahiti, Society Islands.Eos, Vol. 75, No. 16, April 19, p. 191.GlobalXenoliths
DS1994-1421
1994
Qu QiQu Qi, Beard, B.L., Jin, Taylor, L.A.Petrology and geochemistry of aluminium augite and chromium diopside group mantle xenoliths from Tahiti, Society Islands.International Geology Review, Vol. 36, No. 2, February pp. 152-178.GlobalXenoliths, Petrology
DS1994-1422
1994
Qu QiQu Qi, Taylor, L.A., Xinming ZhouGeochemistry and petrogenesis of three series of Cenozoic basalts from southeastern China.International Geology Review, Vol. 36, No. 4, pp. 435-451.ChinaPicrite, nephelinite
DS1998-1440
1998
QuadlingTainton, K., Seggie, A., Bayly, B., Tomlinson, QuadlingRegional variation in mantle heat flow within the Tanzanian Craton7th International Kimberlite Conference Abstract, pp. 880-2.TanzaniaGeotherm - garnets, Deposit - Mwadui
DS1999-0725
1999
QuadlingTainton, K.M., Seggie, Bayly, Tomlinson, QuadlingGarnet therombarometry: implications for mantle heat flow within the Tanzanian Craton.7th International Kimberlite Conference Nixon, Vol. 2, pp. 852-60.TanzaniaCraton mineral chemistry, Deposit - Mwadui, Kisumbi, Negezi, Mhunse, Nzega
DS200812-1212
2008
Quadling, A.Viljoen, F., Quadling, A.Diamond beneficiation linking science and politics.GSSA-SEG Meeting Held July, Johannesburg, 38 Power point slidesTechnologyMetallurgy
DS200512-1143
2005
Quadling, A.G.Viljoen, K.S., Schulze, D.J., Quadling, A.G.Comtrasting Group I and Group II eclogite xenolith petrogenesis: petrological, trace element and isotopic evidence from eclogite, garnet websterite and akremiteJournal of Petrology, Vol. 46, 10, Oct. pp. 2059-2090.Africa, South AfricaXenoliths, Kaalvaalei kimberlite
DS1995-1534
1995
Quadling, K.Quadling, K., Cawthorn, R.G.The layered gabbronorite sequence, Main Zone, eastern Bushveld ComplexSouth Africa Journal of Geology, Vol. 97, No. 4, pp. 442-454South AfricaLayered intrusions, Deposit -Bushveld Complex
DS1998-0544
1998
Quadling, K.E.Grutter, H.S., Quadling, K.E.Some comments on the (ab)use of sodium in garnet to predict eclogitic diamond potential.7th International Kimberlite Conference Abstract, pp. 287-9.South AfricaEclogite - garnets, xenoliths
DS1983-0419
1983
Quam, S.Lynn, H.B., Quam, S., Thompson, G.A.Depth Migration and Interpretation of the Cocorp Wind River, Wyoming, Seismic Reflection Data.Geology, Vol. 11, No. 8, PP. 462-469.GlobalMid-continent
DS1991-1391
1991
Quan BaiQuan Bai, Kohlstedt, D.L.The solubility of hydrogen in olivineEos, Spring Meeting Program And Abstracts, Vol. 72, No. 17, April 23, p. 143GlobalMantle, Experimental petrology
DS1992-1245
1992
Quan BaiQuan Bai, Kohlstedt, D.L.Substantial hydrogen solubility in olivine and implications for water storage in the mantleNature, Vol. 357, No. 6380, June 25, pp. 672-674GlobalMantle minerals, hydrology, Water in the evolution of the earth
DS200912-0606
2009
Quane, S.L.Quane, S.L., Russell, J.K., Friedlander, E.A.Time scales of compaction in volcanic systems.Geology, Vol. 37, 5, May pp. 471-474.TechnologyRheology - high temperature experiments
DS201702-0257
2017
Quanli, C.Yin, Z., Jiang, C., Chen, M., Lu, F., Quanli, C.Inclusions of a-quartz, albite and olivine in a mantle diamond.Gondwana Research, in press available, 29p.ChinaDeposit - Shengli no. 1

Abstract: Mineral inclusions in diamonds have been used to track potential information on the Earth's deep mantle. Here we report results from a detailed study on the mineral inclusions in a ca. 0.28 ct diamond from the Shengli No. 1 kimberlite in Mengyin County, Shandong Province, eastern China. Our study reveals the presence of a-quartz, albite and olivine in the diamond. At an inferred depth of ca. 165 km for the diamond crystallization, the inclusions of a-quartz and albite suggest the possible involvement of deep subducted crustal material, traces of which were captured during the diamond growth and magma migration.
DS200412-1817
2003
Quanlin, H.Shuyin, N., Quanlin, H., Zengqian, H., Aiqun, S., Baode, W., Hongyang, L., Chuanshi, X.Cascaded evolution of mantle plumes and metallogenesis of core and mantle derived elements.Acta Geologica Sinica, Vol. 77, 4, pp. 522-536.MantleMetallogeny
DS200812-0388
2008
Quantin, C.Garnier, J., Quantin, C., Guimaraes, E., Bequer, T.Can chromite weathering be a source of Cr in soils?Mineralogical Magazine, Vol. 72, 1, pp. 49-53.TechnologyChromite - not specific to diamonds
DS1996-1149
1996
Quartermain, C.Quartermain, C.Geology and the government -how it's working at the minerals managementserviceGeotimes, Vol. 41, No. 3, March pp. 21-23United StatesEconomics, Legal -minerals management
DS200612-0996
2006
Quartieri, S.Oberti, R., Quartieri, S., Dalconi, M.C., Boscherini, F., Iezzi, G., Boiocchi, M., Eeckhout, S.G.Site preference and local geometry of Sc in garnets: part 1. multifarious mechanisms in the pyrope-grossular join.American Mineralogist, Vol. 91, 9, pp. 1230-1239.TechnologyMineral chemistry - garnets
DS201112-0837
2011
Quas-Cohen, A.Quas-Cohen, A., Cuthbert, S., Droop, G., Ballentine, C.J., Burgess, R.Diamond facies fluid flow during subduction: evidence and consequence.Goldschmidt Conference 2011, abstract p.1683.Europe, NorwayWestern Gneiss region
DS201705-0834
2017
Quast, D.Hilgner, A., Greiff, S., Quast, D.Gemstones in the first millennium AD. Mines, trade, workshops and symbolism. Romisch-Germanisches Zentralmuseum Leibniz-Forschungsinstitut fur Archaologie Mainz International Conference Oct. 20-22, 2015, pp. 155-217.GlobalBook - gemstones
DS1989-1246
1989
Quate, C.F.Quate, C.F.Variations on an original theme... scanning atomic microscopyNature, Vol. 342, December 14, p. 739-740GlobalMicroscopy, Scanning probe -general
DS200412-1606
2004
Quattara, T.Quattara, T., Couture, R., Bobrovsky, P.T., Moore, A.Remote Sensing and geosciences.Geological Survey of Canada Open File, No. 4542, 1 CD $ 26. 109p.GlobalRemote sensing - overview
DS1992-1246
1992
Quay, P.Quay, P.Carbon sink.. the role of oceansGeotimes, Vol. 37, No. 9, September pp. 16-18GlobalOceans, Carbon cycle
DS201412-0460
2014
Que Hee, S.S.Kinzie, C.R., Que Hee, S.S., Stich, A., Tague, K.A., Mercer, C., Razink, J.J., Kennett, D.J., DeCarli, P.S., Bunch, T.E., Wittke, J.H., Israde-Alcantara, I., Bischoff, J.L., Goodyear, A.C., Tankersley, K.B., Kimbel, D.R., Culleton, B.J., Erlandson, J.M.Nanodiamond rich layer across three continents consistent with major cosmic impact at 12,800 Cal BP Journal of Geology, Vol 122, 5, pp. 475-506.Global, GreenlandNanodiamonds
DS201502-0069
2014
Que Hee, S.S.Kinzie, C.R., Que Hee, S.S., Stich, A., Tague, K.A., Mercer, C., Razink, J.J., Kennett, D.J., DeCarli, P.S., Bunch, T.E., Wittke, J.H., Israde-Alantara, I., Bischoff, J.L., Goodyear, A.C., Tankersley, K.B., Kimbel, D.R., Culleton, B.J., Erlandson, J.M.Nanodiamond-rich layer across three continents consistent with major cosmic impact at 12,800 Cal BP.Journal of Geology, Vol. 122, Sept. pp. 475-506.South America, BrazilNanodiamonds
DS1993-1273
1993
Quebec Department of MinesQuebec Department of MinesNew environmental provisions of the Quebec Mining Act. PreliminaryVersionQuebec Department of Mines, Handout at the PDA in Toronto, March 29th. 13pQuebecLegal -environment, Mining
DS2002-1290
2002
Quebec Department of MinesQuebec Department of MinesRapport sur les activities d'exploration.... mentions of diamond exploration... on various pages.Quebec Deptartment of Mines Rapport sur les Activities, DV 2002-01, 91p.QuebecAreas - Minto, Bienville, James Bay, Superior, Torngat
DS2002-1291
2002
Quebec Minister of Natural resourcesQuebec Minister of Natural resourcesPossible new diamond site identified in northern Quebec.western Saindon-Cambrien corridor.Quebec Ministry of Natural resources, Nov. 27, 1p.Quebec, northernNews item - exploration
DS1989-0032
1989
Queen, M.Archibald, D.A., Hanes, J.A., Queen, M., Ross, D., Farrar, E.Summary of 40Ar/30Ar geochronology in the Kapuskasing upliftGeological Association of Canada (GAC) Annual Meeting Program Abstracts, Vol. 14, p. A103. (abstract.)OntarioTectonics, Kapuskasing Lithoprobe
DS1989-1247
1989
Queen, M.Queen, M., Hanes, J.A., Archibald, D.A.40Ar 39Ar geochronology of dykes and their contact aureloes in the Kapuskasing uplift of the CanadianshieldGeological Association of Canada (GAC) Annual Meeting Program Abstracts, Vol. 14, p. A123. (abstract.)OntarioTectonics, Kapuskasing Zone
DS1993-1274
1993
Queen, M.Queen, M.Ar40 Ar39 dating of the Kapuskasing diabase dyke swarm and lamprophyre dykes in the Kapuskasing uplift.Queen's University, Msc. thesis, 172p.OntarioKapuskasing Dyke swarm, Mid continent, Geochronology
DS1994-0709
1994
Queen, M.Hanes, J.A., Archibald, D.A., Queen, M., Farrar, E.Constraints from 40Ar/39Ar geochronology on the tectonothermal history Of the Kapuskasing uplift.Canadian Journal of Earth Sciences, Vol. 31, No. 7, July pp. 1146-1171.OntarioGeochronology, Tectonics -Kapuskasing uplift
DS1996-1150
1996
Queen, M.Queen, M., Heaman, L.M., Hanes, J.A., Archibald, B.A.40Ar/39Ar phlogopite and U- lead perovskite dating of lamprophyre dykes From the eastern Lake Superior regionCanadian Journal of Earth Sciences, Vol. 33, No. 6, June pp. 958-965.OntarioMidcontinent Rift volcanism., Geochronology
DS2000-0790
2000
Queenstake Res.Queenstake Res., High River GoldCommences legal proceeding against Incanore. Assets in Burkin a Faso include a mention of diamond properties.High River Gold, Aug. 30, 2p.GlobalNews item - press release, Incanore Gold Mines Ltd.
DS201212-0124
2012
Queiroga, G.Chemale, F., Dussin, I.A., Alkmim, F.F., Martins, M.S., Queiroga, G., Armstrong, R., Santos, M.N.Unravelling a Proterozoic basin history through detrital zircon geochronology: the case of the Esponhaco Supergroup, Minas Gerais, Brazil.Gondwana Research, Vol. 22, 1, pp. 200-206.South America, Brazil, Minas GeraisSan Francisco Congo paleocraton, diamond bearing sequences
DS1910-0085
1910
Quelle, O.Quelle, O.Die Diamant lagerstaetten Sued West AfrikaPetermanns Mitt., Vol. 56, No. 1, PP. 22-23.Southwest Africa, NamibiaDiamond Occurrences
DS200712-0332
2007
Quellier, M.H.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
Quellier, M-H.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
DS2002-0429
2002
Quemeneur, J.Engler, A., Koller, F., Meisel, T., Quemeneur, J.Evolution of the Archean/Proterozoic crust in the southern Sao Francisco Craton nearJournal of South American Earth Sciences, Vol. 15, No. 6, pp. 709-23.Brazil, Minas GeraisTectonics - not specific to diamonds
DS1860-0951
1896
Quentrall, C.Quentrall, C.Diamond Mining in 1895South African Mining Journal, Vol. 5, No. 46, AUGUST 22ND. PP. 909-910.Africa, South AfricaDiamond mining
DS2001-0791
2001
Quere, S.Monnereau, M., Quere, S.Spherical shell models of mantle convection with tectonic platesEarth and Planetary Science Letters, Vol. 184, No.3-4, Jan.30, pp.575-88.MantleConvection, Tectonics
DS200612-1118
2006
Quere, S.Quere, S., Forte, A.M.Influence of past and present day plate motions on spherical models of mantle convection: implications for mantle plumes and hotspots.Geophysical Journal International, Vol. 165, 3, pp. 1041-1057.MantleTectonics
DS200812-0770
2008
Quere, S.Moucha, R., Forte, A.M., Mitrovica, J.X., Rowley, D.B., Quere, S., Simmons, Grand, S.P.Dynamic topography and long term sea level variations: there is no such thing as a stable continental platform.Earth and Planetary Science Letters, Vol. 271, 1-4, pp. 101-108.MantleGeomorphology
DS200812-0771
2008
Quere, S.Moucha, R., Forte, A.M., Mitrovica, J.X., Rowley, D.B., Quere, S., Simmons, N.A., Grand, S.P.Dynamic topography and long term sea level variations: there is no such thing as a stable continental platform.Earth and Planetary Science Letters, Vol. 271, 1-4, pp. 101-108.MantleCraton
DS201012-0207
2010
Quere, S.Forte, A.M., Quere, S., Moucha, R., Simmons, N.A., Grand, S.P., Mitrovica, J.X., Rowley, D.B.Joint seismic geodynamic mineral physical modeling of African geodynamics: a reconciliation of deep mantle convection with surface geophysical constraints.Earth and Planetary Science Letters, Vol. 295, 3-4, pp. 329-341.AfricaGeophysics - seismics
DS201507-0332
2015
Quere, S.Quere, S., Lowman, S., Arkani-Hamed, J.P.Subcontinental sinking slab remnants in a spherical geometry mantle model.Journal of Geophysical Research, Vol. 118, 4, pp. 1760-1777.MantleSubduction
DS1998-1200
1998
Querel, G.Querel, G., Reynard, B.Symmetry and disorder in garnets on the pyrope -majorite join from Cr3+luminescence spectroscopy.Geophysical research Letters, Vol. 25, No. 2, Jan. 15, pp. 195-198.GlobalPetrology, Garnet
DS201906-1328
2019
Quesada, C.Murphy, J.B., Quesada, C., Strachan, R.Damian Nance, the supercontinent cycle and much more.GAC/MAC annual Meeting, 1p. Abstract p. 194.Globalplate tectonics

Abstract: Over the past three decades, it has become clear that Pangea was just the most recent of several supercontinents that have amalgamated and dispersed since at least 2.0 Ga. It was fully recognized at the time that the so-called "supercontinent cycle" had a profound effect on Earth Systems, possibly one of the most significant insights since the advent of plate tectonics. In the early 1980's, Damian Nance, along with colleagues Tom Worsley and Judith Moody, were the instigators of this phase of modern thinking and since that time so many international projects and research careers have been spawned by those insights. Although many elegant papers had proposed orogenic episodicity before the acceptance of the plate tectonic paradigm, Damian and colleagues were the first to link such episodicity to a supercontinent cycle. In addition, Damian has made seminal contributions to the understanding of orogenic processes in general, and through his detailed fieldwork, to our foundational knowledge of the geology of the Avalonian belt in Maritime Canada, Paleozoic and Proterozoic complexes in Mexico, recent (Quaternary) tectonics in Greece and even more recent Beam Engine tectonics in Cornwall and the rest of the world. His body of work has had first-order implications for the interpretation of ancient orogens and the processes responsible for them. Most important of all, we have all benefited from the positive impact Damian has had on all our careers and the generosity and collegial approach to research. His influence has extended far beyond his immediate research community as a result of his co-leadership of IGCP projects and his inclusive approach to sharing and developing new avenues in science. He has inspired generations of students and his peers and his legacy is immense.
DS201312-0724
2013
Quesnel, Y.Quesnel, Y., Gattacceca, J., Osinski, G.R., Rochette, P.Origin of the central magnetic anomaly at the Haughton impact structure, Canada.Earth and Planetary Science Letters, Vol. 368, pp. 116-122.CanadaImpacts
DS2002-0968
2002
Quevedo, L.Lowell, J.D., Quevedo, L.Exploring Jurassic porphyry coppers in the Amazon jungle of EcuadorSme Preprint, No. 02-074, 11p. (4p photos)EcuadorGeology - copper, Deposit - Warintza, Mirador, Panantza, San Carlos
DS201212-0489
2012
Quevedo, L.Morra, G., Quevedo, L., Muller, R.D.Spherical dynamic models of top down tectonics.Geochemical, Geophysics, Geosystems: G3, Vol. 13, 3, 27p.MantleTectonics, subduction
DS201910-2284
2019
Quevedo-Gonzalez, L.Menendez, I., Campeny, M., Quevedo-Gonzalez, L., Mangas, J., Llovet, X., Tauler, E., Barron, V., Torrent, J., Mendez-Ramos, J.Distribution of REE-bearing minerals in felsic magmatic rocks and palesols from Gran Canaria, Spain: intraplate oceanic islands as a new example of potential, non-conventional sources of rare earth elements.Journal of Geochemical Exploration, Vol. 204, pp. 270-288.Europe, SpainREE

Abstract: Gran Canaria is a hotspot-derived, intraplate, oceanic island, comprising a variety of alkaline felsic magmatic rocks (i.e. phonolites, trachytes, rhyolites and syenites). These rocks are enriched in rare-earth elements (REE) in relation to the mean concentration in the Earth's crust and they are subsequently mobilised and redistributed in the soil profile. From a set of 57 samples of felsic rocks and 12 samples from three paleosol profiles, we assess the concentration and mobility of REE. In the saprolite that developed over the rhyolites, we identified REE-bearing minerals such as primary monazite-(Ce), as well as secondary phases associated with the edaphic weathering, such as rhabdophane-(Ce) and LREE oxides. The averaged concentration of REE in the alkaline bedrock varies from trachytes (449?mg?kg-1), to rhyolites (588?mg?kg-1) and to phonolites (1036?mg?kg-1). REE are slightly enriched in saprolites developed on trachyte (498?mg?kg-1), rhyolite (601?mg?kg-1) and phonolite (1171?mg?kg-1) bedrocks. However, B-horizons of paleosols from trachytes and phonolites showed REE depletion (436 and 994?mg?kg-1, respectively), whereas a marked enrichment was found in soils developed on rhyolites (1584?mg?kg-1). According to our results, REE resources on Gran Canaria are significant, especially in Miocene alkaline felsic magmatic rocks (declining stage) and their associated paleosols. We estimate a total material volume of approximately 1000?km3 with REE concentrations of 672?±?296?mg?kg-1, yttrium contents of 57?±?30?mg?kg-1, and light and heavy REE ratios (LREE/HREE) of 17?±?6. This mineralisation can be considered as bulk tonnage and low-grade ore REE deposits but it remains necessary to develop detailed mineral exploration on selected insular zones in the future, without undermining environmental and socioeconomic interests.
DS200812-1314
2008
Qui, J.Zhang, Y., Bi, H., Yu, L., Sun, S., Qui, J., Xu, C., Wang, H., Wang, R.Evidence for metasomatic mantle carbonatitic magma extrusion in Mesoproterozoic ore hosting dolomite rocks in the middle Kunyang rift, central Yunnan China.Progress in Natural Science, Vol. 18, 8, pp. 965-974.ChinaCarbonatite
DS200912-0446
2009
Qui, N.Liu, Q., Yang, T., Zeng, Q., Zheng, J., Luo, Y., Qui, N., Xu, H., Jin, Z.Magnetic study of the UHP eclogites from the Chinese Continental Scientific drilling project.Journal of Geophysical Research, Vol. 114, B02106.ChinaUHP
DS201012-0454
2010
Qui, N.Liu, Q., Zeng, Q., Zheng, J., Yang, T., Qui, N., Liu, Z., Lou, Y., Jin, Z.Magnetic properties of serpentinized garnet peridotites from the CCSD main hole in the Sulu ultrahigh pressure metamorphic belt, eastern China.Journal of Geophysical Research, Vol. 115, B6, B06104ChinaUHP
DS201709-1978
2017
Qui, Z.Deng, X., Qui, Z., Wang, Q., Zhang, Y.Kyanite inclusions in eclogitic macrodiamond from Hunan placer diamond deposit.Goldschmidt Conference, abstract 1p.Chinadeposit, Hunan
DS201312-0896
2013
Qui, Z-li.Sun, Y., Qui, Z-li., Lu, T-J., Chen, H., Chen, B-H., Eng, S-Y., Wei, R., Li, L-F.Micro-FTIR mapping tracer for the heterogeneity growth of nitrogen impurities in natural diamond from three localities in China.Spectroscopy and Spectral Analysis, Vol. 32, 8, pp. 2070-2074.ChinaDiamond inclusions
DS201012-0324
2010
Quia, S.S.Ji, S., Quia,S.S., Marcotte, D.Lam parameters of common rocks in the Earth's crust and upper mantle.Journal of Geophysical Research, Vol. 115, B6, B06314.MantleGeophysics - seismics
DS1975-1188
1979
Quick, J.E.Quick, J.E.Dike-wall Rock Interactions in the Trinity Peridotite, Northern California -- Zone Refining in the Upper Mantle.Geological Society of America (GSA), Vol. LL, No. 7, P. 500, (abstract.).GlobalKimberlite
DS1982-0512
1982
Quick, J.E.Quick, J.E.An Upper-mantle Magma Chamber in the Trinity Peridotite, Northern California.Geological Society of America (GSA), Vol. 14, No. 4, P. 226, (abstract.).GlobalHarzburgioclase, Lherzolite, Kimberlite
DS1984-0374
1984
Quick, J.E.Jacobsen, S.B., Quick, J.E., Wasserburg, G.J.A Neodymium and Strontium Isotopic Study of the Trinity Peridotite- implic Ations for Mantle Evolution.Earth and Planetary Science Letters, Vol. 68, No. 3, JUNE PP. 361-378.United States, CaliforniaGeochronology
DS1990-0430
1990
Quick, J.E.DuBray, E.A., Quick, J.E., Sekner, G.I., Pallister, J.S.SAVEWARE I: a dozen programs designed to read DATASAVE files, perform various petrologic calculations and produce printed and graphical dataanalysisUnited States Geological Survey (USGS) Open file, No. 90-616-A, B, C $ 4.50, $6.00, $12.00GlobalComputer, Program -SAVEWAREI
DS1992-0833
1992
Quick, J.E.Kelemen, P.B., Dick, H.J.B., Quick, J.E.Formation of harzburgite by pervasive melt/rock reaction in the uppermantleNature, Vol. 358, August 20, pp. 635-640MantleMantle peridotite, Harzburgite
DS1995-1535
1995
Quick, J.E.Quick, J.E., Sinigol, S., Mayer, A.Emplacement of mantle peridotite in the lower continental crust, Ivrea-Verbano zone, northwest ItalyGeology, Vol. 23, No. 8, August pp. 739-742.ItalyPeridotite, Mantle, crust
DS1995-1715
1995
Quick, J.E.Sharkov, E.V., Sarelainen, B.V., Quick, J.E., Lazko, BoginaArbanksy Massif in the eastern Siberia -the largest in Russia block of the Early Precambrian upper mantle.Proceedings of the Sixth International Kimberlite Conference Abstracts, pp. 506-8.Russia, SiberiaArbansky Massif, Eclogites
DS200812-0930
2008
Quigley, P.O.Quigley, P.O.Michigan kimberlites revisited: new mineral, chemical and petrographic analyses.International Lake Superior Geology Institute, 1p. abstract only quiq0026 @umn.eduUnited States, MichiganBrief overview
DS1990-0332
1990
Quigly, T.M.Cimon, N., Kolb Coe, P., Quigly, T.M.A regression technique for estimating the time required to digitize mapsmanuallyInternational Journal of Geographical Information Systems, Vol. 4, No. 1, January-March pp. 51-54GlobalComputers, Digital maps
DS1993-0978
1993
Quija ZangMasaki Enami, Quija Zang, Yujun Yinhigh pressure eclogites in northern Jiangsu -southern Shandong Province, eastern China.Journal of Metamorphic Geology, Vol. 11, pp. 589-603.ChinaEclogites, metamorphism
DS1995-1536
1995
Quin, S.P.Quin, S.P.Mining opportunities in ArgentinaProspectors and Developers Association of Canada (PDAC) Reprint, 19pArgentinaMining overview, Economics
DS1997-0433
1997
QuinlanGower, 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
DS1989-0942
1989
Quinlan, G.Marillier, F., Keen, C.E., Stockmal, G.S., Quinlan, G., WilliamsCrustal structure and surface zonation of the CanadianAppalachians:implications of deep seismic reflection dataCanadian Journal of Earth Sciences, Vol. 26, No. 2, February pp. 305-321NewfoundlandStructure, Geophysics
DS1994-0125
1994
Quinlan, G.Beaumont, C., Quinlan, G.A geodynamic framework for interpreting crustal scale seismic reflectivity patterns in compressional orogens.Geophysical Journal International, Vol. 116, pp. 754-783.MantleGeodynamics, Geophysics -seismics
DS1994-0701
1994
Quinlan, G.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
DS1984-0601
1984
Quinlan, G.M.Quinlan, G.M., Beaumont, C.Appalachian thrusting, lithospheric flexure, the Paleozoic of the eastern Interior of North America.Canadian Journal of Earth Sciences, Vol. 21, pp. 973-96.AppalachiaTectonics, Structure
DS1950-0293
1956
Quinn, H.A.Quinn, H.A.Mineral Occurrences Between Chipewyan and Herb Lakes, ManitobaPrecambrian, Vol. 29, No. 11, pp. 6-12.ManitobaGeology
DS200412-1233
2004
Quinn, S.J.Martineau, P.M., Lawson, S.C., Taylor, A.I., Quinn, S.J., Evans, D.J.F., Crowder, M.J.Identification of synthetic diamond grown using chemical vapor deposition (CVD).Gems & Gemology, Vol. 40, 1, Spring, pp. 2-25.TechnologyDiamond synthesis - review
DS201112-0838
2011
Quinquis, M.E.T.Quinquis, M.E.T., Buiter, S.J.H., Ellis, S.The role of boundary conditions in numerical models of subduction zone dynamics.Tectonophysics, Vol. 497, pp. 57-70.MantleSubduction
DS201710-2233
2017
Quintao, D.Hoover, D.B., Karfunkel, J., Ribeiro, L.C.B., Michelfelder, G.., Moraes, R.A.V., Krambrock, K., Quintao, D., Walde, D.Diamonds of the Alto Paranaiba, Brazil: Nixon's prediction verified?The Australian Gemmologist, Vol. 26, 5&6, pp. 88-99.South America, Brazil, Minas Geraisdeposit - Alto Paranaiba

Abstract: The authors, in a paper in this journal in 2009, note a puzzle, that in spite of extensive exploration for diamonds by major producers in the Alto Paranaiba region of West Minas Gerais State, Brazil, no primary source, such as kimberlites, for the many diamonds produced since their discovery over 250 years has been found. To answer this puzzle we propose that the diamonds are present within a large extrusive volcanic unit probably derived from the Serra Negra alkaline-carbonatitic complex which comprises a super volcano. This origin fits with the 1995 prediction of Nixon on the future direction of diamona-exploration that extrusive units may contain very large volumes of ore, and that carbonatitic emplacement sources need to be considered. The authors argue, based on available evidence from geology and geophysics, that such an origin is compatible with the known data, but that much additional information is needed to substantiate these ideas. Diamonds of the Alto Paraniaba, Brazil: Nixon's prediction verified?
DS202008-1382
2020
Quinteiro, R.V.S.Conceicao, R.V., Marcon, V.H., Souza, M.R.W., Carniel, L.C., Quinteiro, R.V.S., Rovani, P., Mizusaki, A.M.P., Spitzenberger, M.S.Carbonatite/lamproite liquid imissibility in the Earth's mantle through the nefeline-diopside-kalsilite+-CO2, CH4, H2O diagram.Goldschmidt 2020, 1p. AbstractMantlelamproite

Abstract: The presence and speciation of volatile C-H-O elements in the silicate systems play an important role in the genesis of magmas on the Earth’s mantle, due to the fact that these elements, mainly in the form of H2O, CO2, CH4 and CxHy, decrease the solidi temperatures of source rocks, making magmatism possible in Earth’s present day thermal conditions [1]. Among those elements, carbon is the only element that changes its valence according to the oxygen fugacity (fO2) conditions of the environment, resulting in different speciation, as: CO3 -2, CO2, Cgraphite/diamond, CH4 or heavier hydrocarbons. In the present work, we are determining phase stability of minerals, water, CO2 and CH4 in the system Nefeline-Kalsilite-Diopside. Our experiments are conducted under 4.0 GPa and temperatures up to 1300°C, using a 1000 tonf hydraulic press coupled with toroidal chambers. Preliminary experiments performed at 1300°C and 4.0GPa (initial composition in the Olivine-Quartz- Kalsalite/Nepheline system: 40mol% Ol90, 40mol% Nph50Kls50 and 20mol% Qz, PH2O,CO2=Ptotal) resulted in the formation of forsterite (Fo90) in equilibrium with phlogopite (Phl), melt and volatile phases (CO2 and CH4). Closer to the Diopside vertice, the addition of CO3 to the sample resulted in a imisibility of a carbonatitic and a silicatic melt, in which the carbonititic melt is enriched in sodium, while the silcate melt is enriched in potassium. Appart from that, experiments in different parts of the diagram suggest compositions from nephelinite-kalsilitite to lamproites composition for the silicate melt in equilibrium with diopside (solid solution with omphacite) and phlogopite. This work is a continuation of previous work in the anhydrous diagram and future works will provide the addition of CH4 as the volatile phase
DS1992-1247
1992
Quirt, D.Quirt, D.The 1914 Harris 'Ruby Rush' and its connection to Saskatchewan diamond exploration in the 1990'sSaskatchewan Res. Council, SRC R-1210-1-E94.SaskatchewanExploration, History
DS200512-0573
2005
Quirt, D.Kotzer, T., Kopylova, M., Quirt, D., Cutler, J.In situ characterization of mineral inclusions in diamonds using synchroton X-ray fluoresence.GAC Annual Meeting Halifax May 15-19, Abstract 1p.Mantle, South Africa, Northwest TerritoriesDiamond inclusions
DS2002-1292
2002
Quirt, D.H.Quirt, D.H., Cutler, J.N., Smith, S.What makes a diamond shine: an x-ray absorption and optical luminescence study of carbon in diamond.Gac/mac Annual Meeting, Saskatoon, Abstract Volume, P.94., p.94.GlobalDiamonds - flourescence
DS2002-1293
2002
Quirt, D.H.Quirt, D.H., Cutler, J.N., Smith, S.What makes a diamond shine: an x-ray absorption and optical luminescence study of carbon in diamond.Gac/mac Annual Meeting, Saskatoon, Abstract Volume, P.94., p.94.GlobalDiamonds - flourescence
DS200412-1607
2004
Quirt, D.H.Quirt, D.H.Cr diopside (clinopyroxene) as a kimberlite indicator mineral for diamond exploration in glaciated terrains.Geological Association of Canada Abstract Volume, May 12-14, SS14-05 p. 264.abstractCanada, SaskatchewanGeomorphology
DS200512-0887
2005
Quirt, D.H.Quirt, D.H., Sitepu, H., Cutler, J., Kotzer, T., Kopylova, M.Diamond chemical fingerprinting using synchroton X-ray fluoresence.GAC Annual Meeting Halifax May 15-19, Abstract 1p.Africa, South Africa, Canada, Northwest TerritoriesMineral chemistry, diamond inclusions
DS200612-1119
2004
Quirt, D.H.Quirt, D.H.Cr diopside (clinopyroxene) as a kimberlite indicator mineral for diamond exploration in glaciated terrains.Saskatchewan Geological Survey, Summary of Investigations 2004, Misc. Rept., 2004-4-2 pp. A-10, 14p.Canada, SaskatchewanGeomorphology
DS200612-1315
2005
Quirt, D.H.Sitepu, H., Kopylova, M.G., Quirt, D.H., Cutler, J.N., Kotzer, T.G.Synchronous micro-X-ray fluoresence analysis of natural diamonds: first steps in identification of mineral inclusions in situ.American Mineralogist, Vol. 90, pp. 1740-1747.MantlePetrology
DS200512-0999
2005
Quit, D.H.Sitepu, H., Kopylova, M.G., Quit, D.H., Cutler, J.N., Kotzer, T.G.Synchrotron micro X-ray fluoresence analysis of natural diamonds: first steps in identification of mineral inclusions in situ.American Mineralogist, Vol. 90, Nov-Dec. pp. 1740-1747.MantleDiamond inclusions, chemical compositions
DS1997-0972
1997
Qunyao, X.Rongfu, P., Liangshi, Wu, Qunyao, X.Metallogenic preferentiality and exceptional metallotect convergence ( site) giant ore depositsGlobal Tectonics and Metallogeny, Vol. 6, No. 2, March pp. 103-106ChinaMetallogeny, Deposits
DS201312-0725
2013
Quoc Cuong, N.Quoc Cuong, N., Zuchiewicz, W., Hoang, N., Flower, M.F.J., Thong Chi, C., Mocanu, V.Plate assembly, tectonic responses, and magmatism in southeast Eurasia.Journal of Geodynamics, in press availableEurope, AsiaCraton
DS1960-0731
1966
Quon, S.H.Quon, S.H., Heinrich, E.W.Abundance and Significance of Some Minor Elements in Carbonatites Calcites and Dolomites.India Mineralogical Society Volume, Edited By P.r.j. Naidu, Proceedings 4TH. GENERAL MEETING, PP. 29-36.IndiaRelated Rocks
DS200512-0524
2005
Qureshi, A.A.Khattak, N.U., Qureshi, A.A., Akram, M., Ullah, K., Azhar, M., Asif Khan, M.Unroofing history of the Jambil and Jawar carbonatite complexes from NW Pakistan: constraints from fission track dating of apatite.Journal of Asian Earth Sciences, Vol. 25, 4, July pp. 643-652.Asia, PakistanCarbonatite, geochronology
DS200512-0523
2005
Qureshi, L.E.Khattak, N.U., Akram, M., Ullah, K., Qureshi,L.E.Recognition of emplacement time of Jambil carbonatite complex from NW Pakistan: constraints from fission track dating of apatite using age standard approach.GAC Annual Meeting Halifax May 15-19, Abstract 1p.PakistanPeshawar Plain alkaline rocks, geochronology
DS1996-1151
1996
Quy Dao, N.Quy Dao, N., Quang et al.Discovery of diamond inclusions in rubiesC.r. Academy Of Science Paris, T. 322, II, pp. 515-522.GlobalDiamond inclusions, Diamond, lonsdaleite
DS1986-0021
1986
Qvale, H.Andersen, T., Qvale, H.Pyroclastic mechanisms for carbonatite intrusion- evidence from intrusives in the Fen central complex, southeast Norway. (Technicalnote)Journal of Geology, Vol. 94, No. 5, September pp. 762-769NorwayRare Earths, Carbonatite
DS1986-0307
1986
Qvale, H.Griffen, W.L., Qvale, H.Superferrian eclogites and the crustal origin of garnet peridotites, Almklovdalen, NorwayThe Caledonide Orogen-Scandinavia and Related areas, Gee, D.G. and, pp. 803-812NorwayEclogites, Garnet Peridotites
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
 
 

You can return to the Top of this page


Copyright © 2021 Kaiser Research Online, All Rights Reserved