| | Journal (article/letter/editorial) | from Somerset Island kimberlites: Evidence for lithosphere stratification beneath Arctic Canada S. S...University Street, Montréal, Québec, H3A 2A7, Canada GEOTOP, Université du Québec à Montréal, CP...succ. Centreville, Montréal, Québec, H3C 3P8, Canada 2 (Received December 14, 2000; accepted in revised...pyroxenite xenoliths and their host Nikos kimberlite (100 Ma) from Somerset Island to constrain the isotopic character...root beneath the northern Canadian craton. The Nikos peridotites are enriched in highly incompatible | | | Journal (article/letter/editorial) | systematics of peridotite xenoliths from Somerset Island kimberlites, Canada Stefanie S. Schmidberger a;b; ,...University, 3450 University Street, Montre¤al, QC, Canada H3A 2A7 GEOTOP, Universite¤ du Que¤bec a' Montre¤al...O. Box 8888, succ. Centre-Ville, Montre¤al, QC, Canada H3C 3P8 Received 6 November 2001; accepted 23...constituent garnets from the Nikos kimberlite (100 Ma) on Somerset Island in order to constrain the isotopic...low-temperature Nikos peridotites ( 6 1100‡C), which represent the shallow Somerset lithosphere, are | | | Journal (article/letter/editorial) | of the Archean Mantle Root beneath Somerset Island, Arctic Canada S. S. SCHMIDBERGER∗ AND D. FRANCIS...UNIVERSITY STREET, MONTRÉAL, QUÉBEC H3A 2A7, CANADA RECEIVED APRIL 11, 2000; REVISED TYPESCRIPT ACCEPTED...and garnet pyroxenites from the Nikos kimberlite pipe on Somerset Island, Canadian Arctic, their constituent...constituent garnet and clinopyroxene, and the host kimberlite. These refractory mantle xenoliths are depleted...between calculated and analyzed REE contents for the Nikos bulk rocks that amount to LREE deficiencies of 70–99% | | Wu, Fu-Yuan, Yang, Yue-Heng, Mitchell, Roger H., Li, Qiu-Li, Yang, Jin-Hui, Zhang, Yan-Bin (2010) In situ U–Pb age determination and Nd isotopic analysis of perovskites from kimberlites in southern Africa and Somerset Island, Canada. Lithos, 115 (1) 205-222 doi:10.1016/j.lithos.2009.12.010 | Journal (article/letter/editorial) | from kimberlites in southern Africa and Somerset Island, Canada Fu-Yuan Wu a,⁎, Yue-Heng Yang a, Roger...Geology, Lakehead University, Thunder Bay, Ontario, Canada P7B 5E1 a r t i c l e i n f o Article history:...U–Pb ages Nd isotopes Perovskite Kimberlite Southern Africa Canada a b s t r a c t Determination of...emplacement ages and initial isotopic composition of kimberlite by conventional isotopic methods using bulk rock...twelve samples from 7 kimberlites from Somerset Island, Canada have been selected for in situ perovskite | | | Journal (article/letter/editorial) | American craton: mantle xenolith evidence from Somerset Island kimberlites S.S. Schmidberger ) , D. Francis...UniÕersity, 3450 UniÕersity Street, Montreal, Quebec, Canada H3A 2A7 Received 23 March 1998; received in revised...Abstract The recently discovered Nikos kimberlite on Somerset Island, in the Canadian Arctic, hosts an...garnet–pyroxenite. The whole rock and mineral data for 54 Nikos xenoliths indicate a highly refractory underlying...continental terranes Žave. olivine Fo s 91.0.. The Nikos xenoliths yield pressures and temperatures of last | | | Journal (article/letter/editorial) | University, 3450 University Street, Montréal, Québec, Canada H3A 2A7 GEOTOP, Université du Québec à Montréal...CP 8888 succ. Centreville, Montréal, Québec, Canada H3C 3P8 Received 1 February 2002; accepted 31 March...peridotite xenoliths from the Nikos kimberlite, Somerset Island (Arctic Canada) obtained by laser ablation...trend towards the composition of the host Nikos kimberlite. It thus appears likely that the Sr isotope...result of metasomatic interaction with the host kimberlite magma. The preservation of Sr isotopic variability | | Malarkey, J., Pearson, D.G., Kjarsgaard, B.A., Davidson, J.P., Nowell, G.M., Ottley, C.J., Stammer, J. (2010) From source to crust: Tracing magmatic evolution in a kimberlite and a melilitite using microsample geochemistry. Earth and Planetary Science Letters, 299 (1) 80-90 doi:10.1016/j.epsl.2010.08.020 | Journal (article/letter/editorial) | source to crust: Tracing magmatic evolution in a kimberlite and a melilitite using microsample geochemistry...3LE, United Kingdom Geological Survey of Canada, Ottawa, Canada K1A 0E8 Colorado School of Mines, Golden...2010 Editor: R.W. Carlson Keywords: perovskite kimberlite melilitite Sr isotopes megacrysts a b s t r...study of primary minerals within the Jos kimberlite, Canada, in order to observe how different phases...progressive crustal interaction in the evolving kimberlite. Identification of the least contaminated phases | | | Journal (article/letter/editorial) | What is a Kimberlite? Petrology and Mineralogy of Hypabyssal Kimberlites Roger H. Mitchell1, Andrea Giuliani2...analyses. Melt inclusion studies have shown that kimberlite melts contain higher alkali concentrations than...(magmatic and/or crustal), the composition of primary kimberlite melts remains unknown. intrusive bodies of holocrystalline...coherent rock (Fig. 1A) occur at different depths in kimberlite pipes (see Fig. 4 in Giuliani and Pearson 2019...ic k imberlites” (K PK; formerly “tuffisitic kimberlite”; named after a classic locality in South Africa) | | SCHMIDBERGER, S, HEAMAN, L, SIMONETTI, A, CREASER, R, COOKENBOO, H (2005) Formation of Paleoproterozoic eclogitic mantle, Slave Province (Canada): Insights from in-situ Hf and U–Pb isotopic analyses of mantle zircons. Earth and Planetary Science Letters, 240 (3) 621-633 doi:10.1016/j.epsl.2005.09.057 | Journal (article/letter/editorial) | Paleoproterozoic eclogitic mantle, Slave Province (Canada): Insights from in-situ Hf and U–Pb isotopic analyses...Edmonton, AB, Canada T6G 2E3 b Watts, Giffis and McQuat, 620-475 Howe St., Vancouver, BC, Canada V6C 4B3 ...diamondiferous Jericho kimberlite located within the Archean Slave Province (Nunavut), Canada. The U–Pb zircon...metasomatism including interaction with the host kimberlite magma during sample transport; processes that...In some mantle-derived xenoliths entrained in kimberlite, including eclogite, zircon is an accessory mineral | | | Book | They reveal that, like other Archean cratons, this region is underlain by a very refractory, melt-depleted...reveals that these samples are ancient fragments of island arc basalts that were once at the Earth's surface...British Columbia, Vancouver, British Columbia, Canada V6T 1Z1 Received 12 March 1998; received in revised...is possible only through xenoliths erupted in kimberlite magmas and it is often unclear to what 0024-4937/99/$...coincidence of L with the depth at which deep seated kimberlite xenoliths are believed to originate. Gaherty | | | Journal (article/letter/editorial) | of a Mantle Orthopyroxenite from the Udachnaya Kimberlite Dmitriy I. Rezvukhin 1, * , Taisia A. Alifirova...orthopyroxenite from the Udachnaya-East kimberlite pipe, Daldyn kimberlite field, Siberian platform. Epigenetic...djerfisherite, pyrrhotite), sulfate (barite), phosphates (apatite and phosphate with a suggested crystal-chemical...deep-seated mantle metasomatism, infiltration of a kimberlite-related melt and late post-emplacement hydrothermal...alterations. The reaction of orthopyroxene with the kimberlite-related melt has led to orthopyroxene dissolution | | Lebedeva, Nataliya M., Nosova, Anna A., Kargin, Alexey V., Larionova, Yulia O., Sazonova, Liudmila V., Tikhomirova, Yana S. (2020) Sr–Nd–O isotopic evidence of variable sources of mantle metasomatism in the subcratonic lithospheric mantle beneath the Grib kimberlite, northwestern Russia. Lithos, 376. 105779pp. doi:10.1016/j.lithos.2020.105779 | Journal (article/letter/editorial) | subcratonic lithospheric mantle beneath the Grib kimberlite, northwestern Russia Nataliya M. Lebedeva a,b...Available online 19 September 2020 Keywords: Kimberlite Mantle xenoliths PIC Mantle metasomatism Rb-Sr...clinopyroxene-phlogopite rocks from the Grib kimberlite in the Arkhangelsk diamond province in northwestern...metasomatism took place during the interaction of kimberlite melts with SCLM that contained mica-amphibol...70486–0.70813) that is significantly higher than the kimberlite values and a circa-chondritic εNd (−0.1 − +1 | | Zhang, R.Y., Liou, J.G., Zheng, J.P., Griffin, W.L., Yang, Y.-H., Jahn, B.-M. (2009) Petrogenesis of eclogites enclosed in mantle-derived peridotites from the Sulu UHP terrane: constraints from trace elements in minerals and Hf isotopes in zircon. Lithos, 109 (3) 176-192 doi:10.1016/j.lithos.2008.08.002 | Journal (article/letter/editorial) | numerous mantle eclogite xenoliths are found in kimberlite (e.g., ⁎ Corresponding author. E-mail address:...of garnet and omphacite with minor rutile and apatite. A few samples contain kyanite and quartz (Zhang...5–2 mm. Eclogite (XJ-4D) contains minor brownish apatite. Garnet clinopyroxenite (XJ-5B) is foliated defined...clinopyroxene in eclogite xenoliths from Udachnaya kimberlite after Taylor et al. (2003) are also shown for...account, for the excess LREE; one possibility is apatite as a major carrier for LREE. Partitioning of REE | | | Journal (article/letter/editorial) | typical upper mantle, the continental mantle in this region has been strongly depleted in basaltic components...peridotite at some time before entrainment in kimberlite and as such are manifestations of mantle metasomatism...equilibrated with, the same melt related to Group I kimberlite magma. The Type 2 clinopyroxenes have trace element...therefore probably linked to melt related to Group II kimberlite magma. KEY WORDS: garnet lherzolites; Kaapvaal...et al., 1987) type metasomatism and Group II kimberlite or lamproite magmatism (Dawson & Smith, 1977; | | Sun, Jing, Liu, Chuan-Zhou, Wu, Fu-Yuan, Yang, Yue-Heng, Chu, Zhu-Yin (2012) Metasomatic origin of clinopyroxene in Archean mantle xenoliths from Hebi, North China Craton: Trace-element and Sr-isotope constraints. Chemical Geology, 328. 123-136 doi:10.1016/j.chemgeo.2012.03.014 | Journal (article/letter/editorial) | the lithospheric mantle, such as amphibole and apatite (Menzies and Hawkesworth, 1987). The more modally...L Qi TNC O Fushan 30oN Be lt Paleozoic Kimberlite Mesozoic Diorite Cenozoic Basalt Fig. 1. Sketch...analysis, both international (DUR) and in-house (SAP) apatite standards were used to evaluate the reliability...lithospheric mantle, which has remained in this region after the lithospheric thinning. The refractory...clinopyroxene in mantle xenoliths from the Nikos kimberlite in the northern Canadian Craton record intra- | | | Book | org/details/seventhinternati07inte SEVENTH INTERNATIONAL KIMBERLITE CONFERENCE Cape Town, April 1998 EXTENDED ABSTRACTS...Organising Committee of the 7th International Kimberlite Conference takes no responsibility for authors’...omissions. SOUTH AFRICA SEVENTH INTERNATIONAL KIMBERLITE CONFERENCE SPONSORS The 7IKC Organising Committee...recently discovered kimberlites of the Siberian kimberlite province. 9 K - rich clinopyroxenes as mantle...Chromite Macrocrysts and their Inclusions, Guaniamo Kimberlite Field, Venezuela. Primary and related diamond | | | Book | Halogens in Layered Intrusions 6.1 Introduction 6.2 Apatite Occurrence and Compositional Trends in Layered...6.5 Apatite-Biotite Geothermometry 6.6 Chlorine Isotopes 6.7 Halogen Partitioning between Apatite, Silicate...Volatile Fluid 6.8 Causes of Halogen Variations in Apatite 6.8.1 Parent Magma Cl/F Variations 6.8.2 Trapped...PGE deposits. This includes unusually Cl-rich apatite found in the ores themselves and in the rocks beneath...evidence that the hydrous minerals, particularly apatite, are unusually enriched in chlorine, an element | | | Book | country in which to carry out fieldwork. A whole new region of the world to get to grips with, a new craton...Greenstone Belt in west Greenland and to examine, in a region of superb exposure, what is perhaps the most ancient...southern part of the Superior province in Canada. This region shows a west to east transition from a... Country Craton Age (Ga) Features Abitibi Canada Superior Pd Belingwe Zimbabwe Zimbabwe 2...mapping in greenstone belts such as Abitibi in Canada has demonstrated that “modernstyle” tectonic processes |
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