 | Wu, Fu-Yuan, Yang, Yue-Heng, Mitchell, Roger H., Li, Qiu-Li, Yang, Jin-Hui, Zhang, Yan-Bin (2010) In situ UâPb 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,â, 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:...UâPb 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) | | 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 |  | | Journal (article/letter/editorial) | | 1093/petrology/egn034 Crystallization of Groundmass Spinel in Kimberlite P. L. ROEDER1* AND D. J. SCHULZE2 1 DEPARTMENT...QUEENâS 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...phase that crystallized as small octahedra from kimberlite magma on the journey from the upper mantle to...spinel^magnetite. This zoning trend is unique to spinel in kimberlite, carbonatites and lamprophyres. We suggest that |  | | Journal (article/letter/editorial) | | evolution:phlogopitesand oxidesfrom the Fayette County kimberlite, Pennsylvania Rosenr H. HuNren.r ReNoeL D. KIssI-tNG...peridotitexenoliths,and crustalfragmentsset in a matrix of phlogopite,spinel, ilmenite, perovskite, rutile, carbonate...fugacitesof 02, 52, and CO2. Introduction Typically, kimberlite consistsof megacrysts,and their inclusions,and...and xenoliths all set in a matrix of oxides, phlogopite,serpentine,and carbonate(e.g., Skinnerand Clement...velocity zone (LVZ) related to the genesisof kimberlite and its early stages of evolution. In this regard |  | | 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 imberlitesâ (K PK; formerly âtuffisitic kimberliteâ; named after a classic locality in South Africa) |  | | 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) | | Lakehead University, Thunder Bay, Ontario P7B 5El, Canada Abstract. Phlogopites in the wolgidites, fitzroyites...Kimberley area range in composition from titaniferous phlogopite to titaniferous tetraferriphlogopite. Two distinct... The phlogopite compositional trends at low pressures are very different to those of kimberlite micas...last ten years in understanding the petrology of kimberlite but comparable studies of orendite-type lavas...Ti-richterite-leucite lamproite fitzroyite : phlogopite-leucite lamproite cedricite: diopside-Ti-richt |  | | 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 |  | | Journal (article/letter/editorial) | | diamonds (e.g. Prider 1960, Jaques et aI1982). Kimberlite provinces consistently possess the following...Figure 1 Very generalized representation of kimberlite localities. Shaded regions are cratons ;C 1500...m.y. old. Open symbols represent individual kimberlite bodies; closed symbols show provinces. Diamond...(c) epeirogenic f1exuring directly preceding kimberlite intrusion, as in South Africa and Siberia (Dawson...(Dawson 1980). Structural analysis of kimberlite terranes through field mapping, geo- , physical exploration |  | | Journal (article/letter/editorial) | | diamond. It is propoed that a typical Indian kimberlite is the product of the mechanical mixing of a...e a r i n g kimberlite, and it is p a r t o f the s o u t h e r n I n d i a n kimberlite province {Fig...k s c r o p o u t in the central I n d i a n kimberlite province w h i c h c o n t a i n s t h e Majhagawan...o m b o t h t h e s o u t h e r n and central kimberlite province are o f Late P r o t e r o z o i c age...silicate a n d o x i d e minerals o f I n d i a n kimberlite. An a t t e m p t is m a d e to trace the e v |  | | Journal (article/letter/editorial) | | in kimberlites: Elwin Bay and Tunraq kimberlites, Somerset Island, Canada (MITCHELL, 1978, 19â79); kimberlitic...kimberlitic dyke, Keith township, Ontario, Canada (WATSON et af., 1978); Central West Greenland kimberlites...are apparently of rimmed crystals surrounded by kimberlite matrix. We extend the pioneering study of CARSWELL...adjacent rocks, can be expected during intrusion of kimberlite magma into peridotitic rocks. Petrographic textures...1373) noted strong shearing in mantle-derived phlogopite from intenselydeformed Buitfontein rocks, and |  | | Journal (article/letter/editorial) | | Geology, University of Western Ontario, London, Canada N6A 5B7 Previously proposed substitution mechanisms...compositions. For the majority of phlogopites from the kimberlite group and for all those crystallized in the experimental...solubility of Ti in phlogopites. This suggests that phlogopite in high-K rocks may be a potential geothermometer...possibly a geobarometer. Abstract. Introduction Phlogopite is the only common mineral stable under mantle...Forbes and Flower 1974). This suggests that Ti-phlogopite may also be an important source of Ti in the |  | | Report (issue) | | 3. 4. 5. 6. 7. 8. Geologic map of Williams kimberlite diatremes Magnetic map of Williams 1, 2 and 3...was occurring just prior to incorporation in kimberlite and that ascent was rapid enough (40-70 km/hr)...recrystallization before or during inclusion in kimberlite is suggested by larger (up to 3mm) euhedral olivines...Two low T-P Iherzolites contain distinctive, phlogopite-rimmed, 5-8mm clots of moderate-Cr garnet + Cr-spinel...to inclusion in the kimberlite, followed by metasomatic introduction of phlogopite. These textural and |  | | Report (issue) | | OF THE INTERIOR GEOLOGICAL SURVEY LAKE ELLEN KIMBERLITE, MICHIGAN, U.S.A. by E. S. McGee and B. C. Hearn...Location map for the Lake Ellen kimberlite Magnetic map of the Lake Ellen kimberlite, showing outcrops P nrl...ilmenites A. Megacrysts and xenocrysts, Lake Ellen kimberlite B. Lake Ellen megacrysts and xenocrysts compared...eclogite and pyroxenite xenoliths from Lake Ellen kimberlite Temperature-pressure diagram, Lake Ellen xenoliths... 3. 4. 5. 6. Megacrysts from the Lake Ellen kimberlite Composite xenocrysts A. Garnet-clinopyroxene |  | | Journal (article/letter/editorial) | | Petrology 9 Springer-Verlag 1984 The alleged kimberlite-carbonatite relationship: evidence from ilmenite...composition, have been used to refute the "alleged kimberlite-carbonatite relationship". New microprobe analyses...kimberlites. The ilmenites are distinguished from kimberlite ilmenites by higher MnO, FeTiO 3, and Nb2Os,...negligible Cr20 3. The spinels are distinguished from kimberlite spinels by their AI203 and Cr203 contents. There...carbonaterich dikes of igneous origin cut the kimberlite of the Premier Mine, South Africa. Dawson (1980) |  | | Journal (article/letter/editorial) | | Departmentof Geology Universityof WesternOntario London, Canada,N6A 587 Abstract The ultrapotassicrocks of the...analysesof the rocks and their major minerals, phlogopite-rimmed olivines, some of the spinel group minerals...melting. By fractionation of olivine, diopside and phlogopite, an olivine orendite cumulate may be produced...Spain; the West Kimberley region, Western Australia; the Toro-Ankole region, southwest Uganda; and Gaussberg...partial ashing of a metasomatizedupper mantle with phlogopite being fractionated prior to segregation of the |  | | Journal (article/letter/editorial) | | New Brunswick Fredericton. New Brunswick. E3B 5A3 Canada Abstract The two generationsof micas in the Shaw's...feldspar lamprophyre)of northern New Brunswick, Canada,are TiO2-richphlogopiteswith variable but low silica...contains micas unlike those in minettes.Those kimberlite phlogopitesthat match minettemicasare predom...Geology, University of Regina, Regina, Saskatchewan,Canada. 0003-004)0E4l0102-0Ml$02.00 4l K-feldspar lamprophyres)and...phlogopiteshave this sum less than 8. The Shaw's Cove Canada,where it has been emplacedalong a conglomer- micas |  | | 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 anâą 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 |  | | 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...phenocrysts of olivine and phlogopite set in a groundmass of olivine, phlogopite, diopside, perovskite, and...(pseudomorphed), and phlogopite macrocrysts and phenocrysts in a matrix of phlogopite, leucite, diopside |  | Nasir, S., Al-Khirbash, S., Rollinson, H., Al-Harthy, A., Al-Sayigh, A., Al-Lazki, A., Theye, T., Massonne, H.-J., Belousova, E. (2011) Petrogenesis of early cretaceous carbonatite and ultramafic lamprophyres in a diatreme in the Batain Nappes, Eastern Oman continental margin. Contributions to Mineralogy and Petrology, 161 (1) 47-74 doi:10.1007/s00410-010-0521-3 | Journal (article/letter/editorial) | | dominated by carbonate, altered olivine, TiâAlâphlogopite and CrâAlâspinel and contain varying amounts...Foley (1992) wherein veins are represented by phlogopite, 123 48 carbonate and apatite and depleted...rocks include group-I ââbasalticââ, and group-II kimberlite ââorangeites, micaceous lamprophyricââ, and olivine...The Sal ultramafic lamprophyric sills have a phlogopite ArâAr late 123 Contrib Mineral Petrol (2011)...et al. 2008b; Nasir in preparation). Similar phlogopite ArâAr age of 150 Ma is measured for glimmerite |  | | Journal (article/letter/editorial) | | also provoked debate. Fresh, hypabyssal-facies kimberlite from S. W. Pennsylvannia contains a well-preservedmegacrystand...xenoliths are set in a matrix largely composed of phlogopite, ilmenite, Cr-spinel-titanomagnetiterroperovskite...general characteristicsof the Fayette County kimberlite are describedin a companionpaper(Hunter et al...abundant than the Cr-poor suite, by a factor of 2-3. Phlogopite megacrysts are rare and may or may not belong...reaction assemblagebeing mantled by interlocking phlogopite flakes. Assemblagesof spinel, cpx, opx and glass |  | | Book | | Mitchell Lakehead University Thunder Bay, Ontario Canada SPRINGER SCIENCE+BUSINESS MEDIA, LLC Library...kimberlites and reviews some of the advances in kimberlite petrology since 1986. The work is a critical...although current hypotheses for the genesis of kimberlite and orangeite are critically reviewed. These...Natural Sciences and Engineering Research Council of Canada, Lakehead University, and De Beers Consolidated...8.1. Finsch . . . . . . . . 1.8.2. Barkly West Region. 1.8.2.1. Bellsbank. 1.8.2.2. Sover . . . 1.8.2 |  | | Report (volume) | | BULLETIN 1604 Garnets are useful tracer minerals for kimberlite prospecting in Montana, and garnet color and...Bibliography: p. 32 Supt. of Docs. no.: 1 19.3:1604 1. Kimberlite-Montana. 2. Garnet-Montana. I. McGee, E. S. II...Abstract Garnet is a useful tracer mineral for kimberlite prospecting, and garnet color can specifically...minerals (Leighton and McCallum, 1979). Garnet in kimberlite is most commonly derived from disaggregated upper...upper mantle material. Garnet in kimberlite can also be derived from lower or upper crustal rocks or |  | | Report (issue) | | Abstract Garnet is a useful tracer mineral for kimberlite prospecting and garnet color can specifically...minerals (Leighton and McCallum, 1979). Garnet in kimberlite is most commonly derived from disaggregated upper...upper mantle material. Garnet in kimberlite can also be derived from lower or upper crustal rocks, or...were disaggregated and incorporated into the kimberlite during its eruption. Garnets from any of these...these sources could be distinctive indicators of kimberlite in a drainage basin where other garnet-bearing |  | | Book | | ABSTRACTS contributed to THE SECOND INTERNATIONAL KIMBERLITE CONFERENCE Bishop's Lodge, Santa Fe, October...â âąA- V\ f I ' , A. DIAMONDIFEROUS SOUTHERN KIMBERLITE OF THE WAJRAKHARUR AREA, INDIA. Jagannadham...known in India from antiquity the presence of kimberlite has been the subject of much specuÂŹ lation and...were described, but were discounted as being kimberlite (Foote, 1889; Lake, 1890). Subsequently...and Mehr, 1953) but generally conÂŹ sidered that kimberlite was not present. However, in 1963 Rao and Phadtre |
|
