| | 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) | 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 | | 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) | 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 | | | 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% | | 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) | University, GEOTOP UQAM-McGill, Montréal, Québec, Canada H3A 2A7 A R T I C L E I N F O Article history:...May 2008 Available online 4 June 2008 Keywords: Kimberlite Aillikite Lithospheric mantle Continent Diamond...Si-poor side of the composition of olivine. Group-I kimberlite can be distinguished from aillikite on the basis...inverse correlation between diamond grade and kimberlite Fe and Ti contents may simply reflect the fact...diamond production of kimberlite fields and the Fe and Ti contents in their host kimberlite and conclude that | | | 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) | | | Journal (article/letter/editorial) | available ages include an Ar–Ar date of 34 Ma (phlogopite) from a mantle xenolith, and a 206Pb/238U date...oceanic setting mimics that defined by cratonic kimberlite provinces and suggests that the Malaitan upper...chain is located within the southwestern Pacific region and delineates the boundary between the Pacific...Indo–Australian lithospheric plates (Fig. 1). The region is dominated by the Ontong Java Plateau (OJP; Fig...et al., 1999): The Pacific Province (includes the island of Malaita — Fig. 1B), the Central Province, and | | Bragagni, A., Luguet, A., Fonseca, R.O.C., Pearson, D.G., Lorand, J.-P., Nowell, G.M., Kjarsgaard, B.A. (2017) The geological record of base metal sulfides in the cratonic mantle: A microscale 187 Os/ 188 Os study of peridotite xenoliths from Somerset Island, Rae Craton (Canada) Geochimica et Cosmochimica Acta, 216. 264-285 doi:10.1016/j.gca.2017.04.015 | Journal (article/letter/editorial) | study of peridotite xenoliths from Somerset Island, Rae Craton (Canada) A. Bragagni, A. Luguet, R.O.C. Fonseca...study of peridotite xenoliths from Somerset Island, Rae Craton (Canada), Geochimica et Cosmochimica Acta...STUDY OF PERIDOTITE XENOLITHS FROM SOMERSET ISLAND, RAE CRATON (CANADA) A. Bragagni1, 2*, A. Luguet1, R...Atmospheric Sciences, University of Alberta, Edmonton, Canada 4 Laboratoire de Planétologie et Géodynamique...Durham, Durham, UK 6 Geological Survey of Canada, Ottawa, Canada *: Corresponding author: abragagn@uni-koeln | | | 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) | EOS, University of British Columbia, Vancouver, Canada, V6T 1Z4 b d Received 25 July 2005; received...the late Mesozoic to early Cenozoic when the Tok region was close to the subduction-related Pacific margin...currently available, comes from the Udachnaya kimberlite in central craton [2,3] (Fig. 1). A small number...series Tok xenoliths have accessory amphibole, phlogopite and/or finegrained interstitial materials; the...shown are peridotite xenoliths from the Baikal region [16] and SE Siberia [23]; calculated whole-rock | | 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...orthopyroxene, clinopyroxene, garnet, ilmenite and phlogopite from sheared garnet lherzolite, granular garnet...lherzolites and clinopyroxene-phlogopite rocks from the Grib kimberlite in the Arkhangelsk diamond province...metasomatism took place during the interaction of kimberlite melts with SCLM that contained mica-amphibol | | Giuliani, Andrea, Woodhead, Jon D., Phillips, David, Maas, Roland, Davies, Gareth R., Griffin, William L. (2018) Titanates of the lindsleyite–mathiasite (LIMA) group reveal isotope disequilibrium associated with metasomatism in the mantle beneath Kimberley (South Africa) Earth and Planetary Science Letters, 482. 253-264 doi:10.1016/j.epsl.2017.11.014 | Journal (article/letter/editorial) | in metasomatised mantle xenoliths entrained in kimberlite, basalts and related magmas. As the metasomatic...close textural association with clinopyroxene and phlogopite in low-temperature (∼800–900 ◦ C), strongly metasomatised...mantle xenoliths from the ∼84 Ma Bultfontein kimberlite (South Africa). Previous U/Pb dating of the LIMA...silicate melts and previously metasomatised, phlogopite-rich lithospheric mantle. This study demonstrates...C–O–H, and hydrous potassic fluids coeval with kimberlite magmatism in the lithospheric mantle beneath | | Griffin, W.L., O'Reilly, Suzanne Y., Doyle, B.J., Pearson, N.J., Coopersmith, H., Kivi, K., Malkovets, V., Pokhilenko, N. (2004) Lithosphere mapping beneath the North American plate☆. Lithos, 77 (1) 873-922 doi:10.1016/j.lithos.2004.03.034 | Journal (article/letter/editorial) | Australia c Kennecott Canada Exploration Inc., 200 Granville Street, Vancouver, BC, Canada V6C 1S4 d Great...80522, USA e Kennecott Canada Exploration Inc., Thunder Bay, Ontario, Canada P7B 2Y1 f United Institute...reflect extensive metasomatic modification. In E. Canada, the degree of modification increases toward the...less refractory. The SCLM beneath the Kansas kimberlite field is highly melt-metasomatised, reflecting...Saskatchewan Sextant Rapids Slave Province Somerset Island State Line Anuri Doyle Lake Drybones Jericho | | | 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...minerals include silicates (olivine, clinopyroxene, phlogopite, tetraferriphlogopite, amphibole-supergroup minerals...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 | | | 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...have trace element similarities to those of PIC (Phlogopite± Ilmenite±Clinopyroxene) rocks appear to have...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 | | | 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...Brazil: Preliminary studies. 26 The Complete Phlogopite-Tetraferriphlogopite Series in the Catalao-I | | 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) | content of clinopyroxene less than 5%. Although phlogopite has been reported in the Hebi mantle xenoliths...L Qi TNC O Fushan 30oN Be lt Paleozoic Kimberlite Mesozoic Diorite Cenozoic Basalt Fig. 1. Sketch...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-...from the alteration and contamination (from the kimberlite) experienced by these rocks cannot be eliminated | | Xu, Rong, Liu, Yongsheng, Tong, Xirun, Hu, Zhaochu, Zong, Keqing, Gao, Shan (2013) In-situ trace elements and Li and Sr isotopes in peridotite xenoliths from Kuandian, North China Craton: Insights into Pacific slab subduction-related mantle modification. Chemical Geology, 354. 107-123 doi:10.1016/j.chemgeo.2013.06.022 | Journal (article/letter/editorial) | midocean ridge basalts (Elliott et al., 2006), ocean island basalts (Weaver, 1991), continental basalts (Liu...peridotite xenoliths from the Nikos kimberlite on Somerset Island in Arctic Canada, which have equilibrated...mantle wedge (BMW) model to describe the northeast region of China. If the destruction of the NCC was related...presence of newly formed phases (e.g., Amp and/or phlogopite) (Bailey, 1987). Mantle metasomatic agents are...indicating that the arc-trench system covers the entire region from the Japan trench to East Asia (Fig. 1b) (Huang | | | Book | Note especially the lack of mineralization in the region of the Dow Meadow Depression (Figure 2.11). A black-and-white...core of massive sulfide in pegmatoid from the same region as in (a). Cast of surrounding pegmatoidal minerals...anomalously low compared with mid-ocean ridge, ocean island and flood basalts (800–1,500; e.g., Wallace and...non-volatile incompatible elements such as K2O. Ocean Island ‘hot spot’ basalts generally overlap with MORB...total Fe concentration. In contrast, some ocean island basalts can contain up to 0.3 wt.% S without significant |
|