 | | Journal (article/letter/editorial) | | Sulphide Mineralogy of the Peuyuk Kimberlite, Somerset Island, N.W.T., Canada R.H. Mitchell LakeheadUniversity...University,Halifax,Nova Scotia Abstract. The Peuyuk kimberlite is divisable into three petrographically distinct...serpentine-carbonate mixture followed by a mixture of Ti free magnetite and minor rutile. Perovskites are mantled by nickeliferous...formed prior to the fluidized intrusion of the kimberlite. All other spinels being considered to have crystallized...temperatures (800~00 ~ C) along the quartz-fayalite-magnetite buffer. In the immediate post-fluidization history |  | | Journal (article/letter/editorial) | | of oxide minerals in six carbonate-kimberlites: Peuyuk, Tunraq, Wesselton, Liqhobong, De Beers, and Benfontein...crystallization appears to be typical of carbonate-rich kimberlite magmas, and is texturally related to the two...pre-fluidization to post-fluidization stages of kimberlite emplacement (Haggerty, 1973; Mitchell & Clarke...residuum with progressive crystallization of kimberlite magma is typical and probably more common than...for estimating kimberlite compositions. Skinner & Clement (1979) proposed a kimberlite classification |  | 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) | | The physical and chemical changesundergoneby kimberlite magma during its eruption and crystallization...can be gained by study of groundmassminerals in kimberlite and of late-stagereactionsbetween kimberlitic...kimberlitic minerals and the residualfluids of kimberlite magma.Boyd and Clement (1977)describedmetasomatic zoning...zoning trend" toward enrichment in MgTiO, and a "kimberlite reaction trend" toward enrichmentin FeTiO, and...describedcomplex reaction mantles on ilmenite nodules in kimberlite and discussedtheir signifcance as indicators |  | 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 |  | | Journal (article/letter/editorial) | | andradite, as IW chromian It as The 104, spinel, magnetite, well serpentine. serpentine. above Fe3+-rich...occurs 50,um across in calcite, is included magnetite all atomic ratios of Iwanai-dake mass. Perovskite...In Japan, magnesioferrite was identified in a magnetite-bearing pyrite ore of Bessi and Shingu mines by...been described only from alonite in the Oka area, Canada (Gold, 1967), and monticellite peridotite in the...described in alnoite (Dawson et al., 1978) and kimberlite (Mitchell and Clarke, 1976; Gogineni et al., |  | Masun, K.M., Doyle, B.J., Ball, S., Walker, S. (2004) The geology and mineralogy of the Anuri kimberlite, Nunavut, Canada. Lithos, 76 (1) 75-97 doi:10.1016/j.lithos.2004.03.022 | Journal (article/letter/editorial) | | Anuri kimberlite, Nunavut, Canada K.M. Masun *, B.J. Doyle, S. Ball, S. Walker Kennecott Canada Exploration...Suite 354, 200 Granville Street, Vancouver, BC, Canada V6C 1S4 Received 25 June 2003; accepted 6 January...online 18 May 2004 Abstract The 613 F 6 Ma Anuri kimberlite is a pipelike body comprising two lobes with...types: volcaniclastic kimberlite (VK) and, less common, hypabyssal kimberlite (HK). The HK is an archetypal...archetypal kimberlite composed of macrocrysts of olivine, spinel, mica, rare eclogitic garnet and clinopyroxene |  | Clarke, D.B., Pe, G.G., Mackay, R.M., Gill, K.R., O'Hara, M.J., Gard, J.A. (1977) A new potassium-iron-nickel sulphide from a nodule in kimberlite. Earth and Planetary Science Letters, 35 (3) 421-428 doi:10.1016/0012-821x(77)90075-9 | Journal (article/letter/editorial) | | POTASSIUM-IRON-NICKEL SULPHIDE FROM A NODULE IN KIMBERLITE D.B. CLARKE, G.G. PE 1, R.M. MACKAY Department...f Geology, Dalhousie University, Halifax, N.S. (Canada) K.R. GILL, M.J. O ' H A R A Grant Institute o...clinopyroxene-ilmenite intergrowth from the Frank Smith kimberlite diatremes. The mineral occurs as ovoid blebs...considered. The discovery of potassic sulphide in a kimberlite nodule has important implications, not only as... there are two kimberlite diatremes approximately 200 m in diameter, and a kimberlite dyke 3 0 - 4 0 |  | Armstrong, John P., Wilson, Mark, Barnett, Robert L., Nowicki, Tom, Kjarsgaard, Bruce A. (2004) Mineralogy of primary carbonate-bearing hypabyssal kimberlite, Lac de Gras, Slave Province, Northwest Territories, Canada. Lithos, 76 (1) 415-433 doi:10.1016/j.lithos.2004.03.025 | Journal (article/letter/editorial) | | carbonate-bearing hypabyssal kimberlite, $ $$ Lac de Gras, Slave Province, Northwest Territories, Canada , John P. Armstrong...Yellowknife, NT, Canada Department of Earth Sciences, Memorial University, St. John’s, NL A1B 3X5, Canada c R.L...Lambeth, ON, Canada d Mineral Services, Vancouver, BC, Canada e Geological Survey of Canada, Ottawa, ON...ON, Canada Received 21 June 2003; accepted 4 January 2004 Available online 28 May 2004 Abstract A suite...mineralogy and are archetypal or Group 1 kimberlite. Five kimberlite localities are identified as calcite-bearing |  | | Journal (article/letter/editorial) | | Springer-Verlag 1981 Oxide Minerals in a Layered Kimberlite-Carbonate Sill from Benfontein, South Africa...shows a high degree of magmatic sedimentation to kimberlite, oxidecarbonate, and carbonate layers. The iron-titanium...carbonarites. Introduction The relation between kimberlite and carbonatite has been a subject of controversy...and the coexistence of primary carbonate and kimberlite in sills and dikes are commonly considered as...as evidence of a genetic relationship between kimberlite and carbonatite (Dawson and Hawthorne 1973; Gittens |  | | Journal (article/letter/editorial) | | Highly evolved hypabyssal kimberlite sills from Wemindji, Quebec, Canada: insights into the process...process of flow differentiation in kimberlite magmas Shannon E. Zurevinski • Roger H. Mitchell Received: 3...Abstract Kimberlite sills emplaced in granite located near the town of Wemindji (Quebec, Canada) range...dolomitic hypabyssal kimberlite to ilmenite/ garnet macrocrystal hypabyssal kimberlite. Diatreme or crater...Cr-poor members of the qandilite–ulvöspinel–magnetite series. The principle carbonate comprising the |  | | Journal (article/letter/editorial) | | Me, Nb, Zr, Cr, Cu, Zn, Mn, Co, and Ni. Each kimberlite contains discrete ilmenites which exhibit a wide...Cmtario. Canada. Magnesian ilmenite is one of the most characteristic minetaL~ of kimberlite, yet at...with regard to its origin and relationship to kimberlite. Several recent studies summarized below, for...e s i a n ilmenite is a mantle xenocryst or a kimberlite phenocryst. Magnesian ilmenite has several modes...composition crystallizing at high pressures from a kimberlite m a g m a . G r a n u l a r intergrowths (Nixon |  | | Journal (article/letter/editorial) | | 1093/petrology/egn034 Crystallization of Groundmass Spinel in Kimberlite P. L. ROEDER1* AND D. J. SCHULZE2 1 DEPARTMENT...QUEEN’S UNIVERSITY, KINGSTON, ONTARIO K7L 3N6, CANADA 2 DEPARTMENT OF GEOLOGY, UNIVERSITY OF TORONTO...MISSISSAUGA, ONTARIO L5L 1C6, CANADA Groundmass spinel grains in 46 kimberlite and related rocks have been...high-chromium chromite (Chr) and magnesioulvo« spinel^magnetite (Mum) and represent two significant stages of...xenocryst spinel (Xen), pleonaste spinel (Ple) and magnetite (Mag). Eight different spinel zoning trends are |  | | Book | | Mitchell Lakehead University Thunder Bay, Ontario, Canada SPRINGER SCIENCE+BUSINESS MEDIA, LLC Library...petrology. Bibliography: p. Includes index. I. Kimberlite. I. Title. QE462.K5M58 1986 552' .3 ISBN 978-1-4899-0570-3...critique of the advances which have been made in kimberlite studies over the last twenty-five years. Kimberlites...in this book will serve to stimulate further kimberlite studies. Some of the hypotheses discussed will...University and for his help in the continuance of my kimberlite research. This book would not have been possible |  | | Journal (article/letter/editorial) | | the presence of Zn-bearing chromites in several kimberlite-bearing areas on a worldwide scale, the occurrence...spinels for the exploration of diamondbearing kimberlite and lamprophyre is assessed. The Local Geological...(1999), the Guaniamo River drains an important kimberlite-bearing district discovered in 1983, and comprising...comprising at least ten diamondiferous kimberlite sills. Sobolev et al. (1998) carried out a detailed mineralogical...diamondiferous placers were derived from the Guaniamo kimberlite sills; however, a substantial proportion of diamond |  | | Journal (article/letter/editorial) | | mantle plume activity (Morgan 1971). The Hawaiian island chain is perhaps best known for its abundant mantle...are similar to those of Keshav and Sen (2001). Magnetite and ilmenite standards were used to determine...) resemble those found in eclogites of Koidu Kimberlite Complex, Sierra Leone (Hills and Haggerty 1989;...types: type I spinel is a very unusual titano-magnetite with high MgO and Al2O3 (Mg–Al-titanomagnetite...hypersthene; Sp spinel; Chr chromite; Usp ulvospinel; Mt magnetite; Her hercynite 5 40.28 0.06 22.82 0.03 16.21 0 |  | Abersteiner, Adam, Kamenetsky, Vadim S., Goemann, Karsten, Giuliani, Andrea, Howarth, Geoffrey H., Castillo-Oliver, Montgarri, Thompson, Jay, Kamenetsky, Maya, Cherry, Alexander (2019) Composition and emplacement of the Benfontein kimberlite sill complex (Kimberley, South Africa): Textural, petrographic and melt inclusion constraints. Lithos, 324. 297-314 doi:10.1016/j.lithos.2018.11.017 | Journal (article/letter/editorial) | | Composition and emplacement of the Benfontein Kimberlite Sill complex (Kimberley, South Africa): Textural...Composition and emplacement of the Benfontein Kimberlite Sill complex (Kimberley, South Africa): Textural...Composition and emplacement of the Benfontein Kimberlite Sill Complex (Kimberley, South Africa): Textural... ACCEPTED MANUSCRIPT Abstract The Benfontein kimberlite is a renowned example of a sill complex and provides...examine the emplacement and evolution of intrusive kimberlite magmas. We have undertaken a detailed petrographic |  | | Journal (article/letter/editorial) | | Petrogenesis of the Late Cretaceous northern Alberta $ kimberlite province D. Roy Eccles a,b,*, Larry M. Heaman...Geological Survey, Canada Department of Earth and Atmospheric Sciences, University of Alberta, Canada Received...their non-archetypal kimberlite signature (Mountain Lake) or, in the case of kimberlite fields, primitive...distinguish between primitive and evolved Group I-type kimberlite fields in the northern Alberta. This is important...chemistries similar to those of primitive hypabyssal kimberlite in the Northwest Territories. Based on whole-rock |  | | Journal (article/letter/editorial) | | basanite in the Lessini Mountains, in the Veneto region of Italy. All of them present distinct petrographic...Miocene formations. It is located in the Abruzzo region of central Italy, some 4 0 km southwest of the...northeast of the city of Verona, in the Veneto region of northern Italy, and is depicted by the letter...200 μm long), Na amphiboles (~150 μm long), Ti magnetite (up to 150 μm across), and perovskite (up to 70...others are acicular (15 x 400 μm) titaniferous magnetite (15-20 μm across) and apatite (~10 X 100 μm), |  | | Journal (article/letter/editorial) | | Mineral chemistry and crystallization sequences in kimberlite and lamproite dikes from the Sisimiut area, central...C.P. 6128, succ. "A "', Montrkal, P.Q. H3C 3J7 (Canada LITHOS Thy, P., Stecher, O. and Korstg~rd, J...Mineral chemistry and crystallization sequences in kimberlite and lamproite dikes from the Sisimiut area, central...macrocrysts are believed to be cognate. The primary kimberlite and lamproite magmas originated in the mantle...phlogopite points to a relatively low as,o.~ in the kimberlite magmas. Higher as,o.~ appears to have prevailed |  | | Journal (article/letter/editorial) | | 1985 Groundmass oxide minerals in the Koidu kimberlite dikes, Sierra Leone, West Africa Linda A. Tompkins*...and oxide mineral chemistry are presented on 5 kimberlite dikes that are classified into three groups:...serpentinized olivine + N i - F e alloys and magnetite; (3) the remaining dike records an early crystallization...in the Koidu dikes. Objective evaluations of kimberlite-carbonatite relations, as outlined in the literature...enrichment of A1 and Cr, and progressive zonation to magnetite-ulv6spinel, magnesioferrite - Mg2TiO~., or a combination |  | | Book (volume) | | AmericanGeophysicalUnion Washington,D.C. 20009 1979 Kimberlite Conference Preface Since the first edition...was published in 1979, the Third International Kimberlite Conference was held in Clermont-Ferrand in 1982...concerning rocks now misleadingly referred to as Kimberlite will be removea. Diamonds received attention...still there persists the belief that diamonds an• kimberlite are genetically related. And this in spite of...one can separate out the essential minerals of kimberlite. This comment is pertinent to isotopic studies |  | Nikolenko, E.I., Logvinova, A.M., Izokh, A.E., Afanas’ev, V.P., Oleynikov, O.B., Biller, A.Ya. (2018) Cr-spinel assemblage from the Upper Triassic gritstones of the northeastern Siberian Platform. Russian Geology and Geophysics, 59 (10) 1348-1364 doi:10.1016/j.rgg.2018.09.011 | Journal (article/letter/editorial) | | of Cr-spinels and diamond varieties typical of kimberlite sources and between the distribution of Cr-spinels...according to (Shpunt and Shamshina, 1989) (b); 3, kimberlite fields with the age of magmatism O–S, D–C, T...on the Bulkur River (li/10-23), on the Tas-Ary Island (11i/10-31), on the Khatystakh River (12i/10-1)...macrocrysts crystallizing, in particular, from kimberlite melt does not exceed 0.1 mm. The investigated...kimberlites and kimberlite-like rocks using methods have revealed several epochs of kimberlite magmatism on |  | Kumar, Satya P., Shaikh, Azhar M., Patel, Suresh C., Sheikh, Janisar M., Behera, Duryadhan, Pruseth, Kamal L., Ravi, Subramanian, Tappe, Sebastian (2021) Multi-stage magmatic history of olivine–leucite lamproite dykes from Banganapalle, Dharwar craton, India: evidence from compositional zoning of spinel. Mineralogy and Petrology, 115 (1). 87-112 doi:10.1007/s00710-020-00722-y | Journal (article/letter/editorial) | | (spinel-IIIc), magnetite with ulvöspinel component (spinel-IIId) and lastly pure magnetite (spinel-IIIe)...mantle lithosphere. Keywords Spinel . Lamproite . Kimberlite . Mantle metasomatism . Dharwar craton Editorial...of Al and Mg in spinel grains from hypabyssal kimberlite of the De Beers pipe in Kimberley (South Africa)...Ramakrishnan and Vaidyanadhan (2008), with location of kimberlite and lamproite fields in the Eastern Dharwar Craton...diamondiferous oligomictic conglomerate (Fig. 1b). Kimberlite and lamproite fields Kimberlites and lamproites |  | | Report (issue) | | minerals Auricuprid - Cu-Au Braunite (new) Chrome magnetite Covellin, Blaubleibender Erinadine Ferrijordisite...Ti-dumortierite Ti-enstatite Ti-Mg chromite V-Ti-magnetite Proto-am phi bole Proto-grunerite . Proto-riebeckite... varieties Al-greenalite Al,Cr spinel Al-Ti-magnetite Bi-geversite Bosjemanite Ce-barite Chrome-acmite...Chrome-acmite Chrome-muscovite Chrome titano-magnetite ciinoeulite Cr-armalcolite Cr-Al-enstatite Cr-Ca-(NbZr)-armalcolite...dolerite and shale xenoliths in the Dutoitspan kimberlite pipe, Farm Dorst Fontein K 77, Kimberley district |
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