 | | Journal (issue) | | and D.D. Hogarth Diamond collecting in northern Colorado ............................................205...Collins The Lake Clear-Kuehl Lake area, Renfrew County, Ontario.........................................descloizite from the Chalk Mountain mine, Churchill County, Nevada ......................................... Bostwick Mercury amidonitrate crystals from Colorado ....................................233 Printed...to one-of-a-kind museum pieces We have ongoing mining projects at some of the famous localities in the |  | | Journal (article/letter/editorial) | | Dissolution agents used include an aphanitic kimberlite from Wesselton Mine, South Africa, and a lamproite...dissolution strongly depends on temperature, oxidation state, and the compositional dependence of CO2 solubility...melts. INTRODUCTION Natural diamonds hosted by kimberlite or lamproite display various morphological forms...oxygen fugacity) in several kimberlite pipes in the Lac de Gras kimberlite field. They suggested that...that the oxygen fugacity of the host kimberlite influences the diamond population. Evaluation of the dissolution |  | | Journal (article/letter/editorial) | | Mineral inclusions in diamonds from the Sputnik kimberlite pipe, Y akutia N.V. Sobolev a, F.V. Kaminsky... Moscow 117593, Russia ’ CSIRO Exploration and Mining, PO Box 136, North Ryde, NSW 2113, Australia d...accepted 10 September 1996 Abstract The Sputnik kimberlite pipe is a small “satellite” of the larger Mir...comprises omphacite, garnet, Ni-poor sulfide, phlogopite and rutile. Peridotitic ilmenite inclusions have...known from peridotite xenoliths in kimberlite. Eclogitic phlogopite is intergrown with omphacite, coexists |  | | Journal (article/letter/editorial) | | al. 1989), one diamondiferous lherzolite from Sloan, USA (McCallum and Eggler 1976), and two diamondiferous...45 51.67 52.74 Diamondi~rous lherzolite (Sloan, Wyomin~ USA; McCallum and Eggler 1976) S1L102 0.96 ...16 83.94 82.83 1 1 Diamond infusions (Sloan, Wyoming, USA; Otter and Gurney 1989) A37 A73 1-10 1-15(1)...inclusions in d i a m o n d s from three localities (Sloan, USA, Otter and G u r n e y 1989; Koffiefontein, South...~ with two exceptionally low values (one in the Sloan diamonds, one in the Kof- References Ai Y (1992) |  | | Journal (article/letter/editorial) | | natural kimberlite from Wesselton Mine, South Africa and a synthetic H2 Ofree and CO2 -rich kimberlite. Experiments...Experiments with the Wesselton kimberlite were carried out at 1400 and 1500 ◦ C under 1.0 GPa and those...those with the synthetic kimberlite were conducted at 1500 ◦ C under 2.5 GPa. In both series of experiments...octahedral {111} faces in the runs with the natural kimberlite agent; while diamond surfaces were covered by...hexagonal etch pits in the runs with the synthetic kimberlite solvent. The degree of dissolution was highly |  | Sobolev, Nikolai V., Sobolev, Vladimir N., Snyder, Gregory A., Yefimova, Emiliya S., Taylor, Lawrence A. (1999) Significance of Eclogitic and Related Parageneses of Natural Diamonds. International Geology Review, 41 (2) 129-140 doi:10.1080/00206819909465135 | Journal (article/letter/editorial) | | (1 sample), omphacite-phlogopite (2 samples), and garnel-omphacite-phlogopite (1 sample). Major-element...extreme ly variable in their parageneses. The Mir kimberlite pipe in Yakutia is the best example for such...E-type diamonds—such as ilmen ite, picroilmenite, phlogopite, biotite, and ferropericlase—also are discussed...pyroxenite and websterite from the Udachnaya kimberlite were described by Ponomarenko et al. (1980)....inclusions taken from 18 diamonds from the Dianga kimberlite (dated as Jurassic), lo cated in the northern |  | | Journal (article/letter/editorial) | | Polishing-Exposed Solid-Phase Mineral Inclusions in Fuxian Kimberlite Diamonds Donggao Zhao Electron Microscope Laboratory...of Missouri-Kansas City, Kansas City, MO 64108, USA; zhaodo@umkc.edu Citation: Zhao, D. Electron Probe...Polishing-Exposed Solid-Phase Mineral Inclusions in Fuxian Kimberlite Diamonds. Minerals 2022, Abstract: Solid-phase...diamond (1–3 mm in diameter) from the No. 50 kimberlite diatreme of Liaoning Province, China, were exposed...by solid-state growth under metasomatic conditions with the presence of a fluid. Solid-state growth of |  | Mikhailenko, Denis, Golovin, Alexander, Korsakov, Andrey, Aulbach, Sonja, Gerdes, Axel, Ragozin, Alexey (2020) Metasomatic Evolution of Coesite-Bearing Diamondiferous Eclogite from the Udachnaya Kimberlite. Minerals, 10 (4) 383 doi:10.3390/min10040383 | Journal (article/letter/editorial) | | Coesite-Bearing Diamondiferous Eclogite from the Udachnaya Kimberlite Denis Mikhailenko 1,2, * , Alexander Golovin...korsakov@igm.nsc.ru (A.K.); ragoz@igm.nsc.ru (A.R.) State Key Laboratory of Isotope Geochemistry, Guangzhou...coesite-bearing diamondiferous eclogite from the Udachnaya kimberlite (Daldyn field, Siberian craton) has been studied...crystals, up to 200 µm long, coexisting with phlogopite, orthopyroxene, clinopyroxene (secondary), K-feldspar...to interaction with, or precipitation from, a kimberlite-related melt. Judging by pressure-temperature |  | | Journal (article/letter/editorial) | | Marshintsev 1990), China (Fuxian; Leung 1990), U.S.A. (Colorado; McCammon et al. 1997; Otter and Gurney 1986,...reported rutile grains included in moissanite in kimberlite at Kimberley. Oleynikov et al. (1987) reported...consists of a very fine-grained mixture of brucite, phlogopite, calcite, and magnesite, in which abundant macrocrysts...commonly scattered at different mantle depths. Kimberlite-like volcanism might have ultimately brought...phase containing Al6O19 clusters. Journal of Solid State Chemistry, 153, 391–397. Gréaux, S., Gautron, L |  | | Journal (article/letter/editorial) | | Chernogolovka, Moscow district, 142432, Russia Department of Petrology, Moscow State University, Vorob'evy...al., 2007a) suggest their direct relation to kimberlite magmatism. The saline inclusions are mixtures...minerals prior or during the incipience of the kimberlite magma. Moreover, the Abbreviations: Cpx, clinopyroxene;...carbonate–silicate melt; Mc, mica; Mrw, merwinite; Phl, phlogopite; Prp, pyrope; Spl, spinel. ⁎ Corresponding author... Institutskaya str., 4, Chernogolovka, Moscow district, 142432, Russia. Tel./fax: +7 4965244425. E-mail |  | | 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 |  | Smith, C.B, Gurney, J.J, Harris, J.W, Otter, M.L, Kirkley, M.B, Jagoutz, E (1991) Neodymium and strontium isotope systematics of eclogite and websterite paragenesis inclusions from single diamonds, Finsch and Kimberley Pool, RSA. Geochimica et Cosmochimica Acta, 55 (9) 2579-2590 doi:10.1016/0016-7037(91)90374-e | Journal (article/letter/editorial) | | diamonds (1.8 to 4.2 carats) from the 120 Ma Finsch kimberlite have Nd model ages ranging from 1443 to 2408...harzburgite association diamonds from the Finsch kimberlite. However, neither the eclogite nor the websterite...age by KRAMERS (1979) and within error of the kimberlite emplacement age. PHILLIPS et al. (1989) and ...MOSTDIAMONDS CARRIEDto the Earth’s surface in kimberlite and lamproite are thought to originate within...The 40Ar/39Ar ages could, however, represent kimberlite emplacement rather than the actual inclusion |  | Smit, K.V., Shirey, S.B., Richardson, S.H., le Roex, A.P., Gurney, J.J. (2010) Re–Os isotopic composition of peridotitic sulphide inclusions in diamonds from Ellendale, Australia: Age constraints on Kimberley cratonic lithosphere. Geochimica et Cosmochimica Acta, 74 (11) 3292-3306 doi:10.1016/j.gca.2010.03.001 | Journal (article/letter/editorial) | | 5241 Broad Branch Road NW, Washington, DC 20015, USA Received 18 November 2009; accepted in revised form...investigated to determine the nitrogen aggregation state of the diamonds and Re–Os isotope geochemistry of...craton keel stabilisation. The nitrogen aggregation state of the diamonds and calculated mantle residence...al., 2009); George Creek, Sloan and a number of kimberlites in the Colorado–Wyoming province (Otter, 1989;...the internal structure and nitrogen aggregation state of the diamonds and to infer diamond storage temperatures |  | | Journal (article/letter/editorial) | | Chernogolovka, 142432 Russia b Geological Faculty, Moscow State University, Moscow, 119991 Russia cFersman Mineralogical...eclogite, carbon, and titanium minerals from kimberlite (ilmenite FeTiO3, perovskite CaTiO3, and rutile...diamond content with the concentration of Ti in kimberlite do not occur during the diamond genesis in silicate–...titanium concentration and diamond content in kimberlite, melts of titanium minerals, carbonatite melts...1134/S0016702918010032 INTRODUCTION Titanium minerals in kimberlite are mostly represented by ilmenite (Fe,Mg)TiO3 |  | Wirth, Richard, Vollmer, Christian, Brenker, Frank, Matsyuk, Stanislav, Kaminsky, Felix (2007) Inclusions of nanocrystalline hydrous aluminium silicate “Phase Egg” in superdeep diamonds from Juina (Mato Grosso State, Brazil) Earth and Planetary Science Letters, 259 (3) 384-399 doi:10.1016/j.epsl.2007.04.041 | Journal (article/letter/editorial) | | Egg” in superdeep diamonds from Juina (Mato Grosso State, Brazil) Richard Wirth a,⁎, Christian Vollmer b...compressibility of phase “Egg”, its equation of state up to 40 GPa, and the role of water at high pressure...been 385 reported from South Africa, Australia, USA, Canada, Guinea, Venezuela and Brazil (Scott-Smith...superdeep diamonds from the Juina area in Mato Grosso State, Brazil, which mostly comprise alluvial diamond...phase “Egg” was observed. The shape of the spectral line and an additional Raman band at 2558 cm− 1 may indicate |  | | Journal (article/letter/editorial) | | Mineral inclusions in diamonds from the River Ranch kimberlite, Zimbabwe Received: 11 January 1995 / Accepted:...demonstrates a limited overlap with River Ranch kimberlite macrocrysts: the DI garnets are more Ca-undersaturated...economic kimberlites. Mineral chemistry of the LMB kimberlite indicator minerals suggests higher diamond potential...Martin's Drift kimberlite. River Ranch is presently the only diamond producing kimberlite mine in Zimbabwe...kimberlites have been discovered as of 1996. Like the kimberlite itself, all the xenolithic mantle material found |  | | Journal (article/letter/editorial) | | diamond-unfriendly processes, including lamproite and kimberlite generation, are also active and may have a substantial...individual inclusion-free diamonds with our current state of knowledge. Introduction TERRESTRIAL DIAMONDS...rapidly, in explosively emplaced volatile-rich kimberlite, lamproite, or related magmas, or more slowly...probably all diamonds are xenocryst minerals in the kimberlite and lamproite intrusions which are the crustal... Cenozoic (Ma) Sedimentary Host Rocks 65 Kimberlite GI GII Lamproite ~48 20 110 Mesozoic 250 |  | Griffin, W. L., Doyle, B. J., Ryan, C. G., Pearson, N. J., Suzanne, Y. O., Davies, R., Kivi, K., Van Achterbergh, E., Natapov, L. M. (1999) Layered Mantle Lithosphere in the Lac de Gras Area, Slave Craton: Composition, Structure and Origin. Journal of Petrology, 40 (5) 705-727 doi:10.1093/petroj/40.5.705 | Journal (article/letter/editorial) | | SYDNEY, NSW 2109, AUSTRALIA 2 CSIRO EXPLORATION AND MINING, PO BOX 126, NORTH RYDE, NSW 2113, AUSTRALIA 3...chromites) and xenoliths from 21 Cretaceous–Tertiary kimberlite intrusions have been used to map the lithospheric...and most of the remainder come from a single kimberlite (Udachnaya) on the Siberian craton. These two...show that the composition, structure and thermal state of the Kaapvaal lithosphere changed markedly ~90...kimberlites, and provides little record of the earlier state of the cratonic root. In Siberia, data from mineral |  | Rudloff-Grund, J., Brenker, F.E., Marquardt, K., Howell, D., Schreiber, A., O'Reilly, S.Y., Griffin, W.L., Kaminsky, F.V. (2016) Nitrogen nanoinclusions in milky diamonds from Juina area, Mato Grosso State, Brazil. Lithos, 265. 57-67 doi:10.1016/j.lithos.2016.09.022 | Journal (article/letter/editorial) | | in milky diamonds from Juina area, Mato Grosso State, Brazil J. Rudloff-Grund, F.E. Brenker, K. Marquardt...in milky diamonds from Juina area, Mato Grosso State, Brazil, LITHOS (2016), doi:10.1016/j.lithos.2016...in milky diamonds from Juina area, Mato Grosso State, Brazil SC R IP S.Y., Griffin‡, W. L., Kaminsky‡#...data on the nitrogen content, nitrogen aggregation state, and the related amount of hydrogen. 1.1 Nitrogen... ACCEPTED MANUSCRIPT as the nitrogen aggregation state, Type I diamonds are further subdivided. Type Ia |  | Krebs, M. Y., Pearson, D. G., Stachel, T., Stern, R. A., Nowicki, T., Cairns, S. (2016) Using Microdiamonds in Kimberlite Diamond Grade Prediction: A Case Study of the Variability in Diamond Population Characteristics Across the Size Range 0.2 to 3.4 mm in Misery Kimberlite, Ekati Mine, NWT, Canada. Economic Geology, 111 (2) 503-525 doi:10.2113/econgeo.111.2.503 | Journal (article/letter/editorial) | | v. 111, pp. 503–525 Using Microdiamonds in Kimberlite Diamond Grade Prediction: A Case Study of the...Across the Size Range 0.2 to 3.4 mm in Misery Kimberlite, Ekati Mine, NWT, Canada* M. Y. Krebs,1,† D....size-frequency analysis to predict diamond grade in kimberlite diamond deposits. Introduction In diamond exploration...Archean craton with a cool mantle root. Over 300 kimberlite occurrences are known from the Slave craton,...assumes efficient mixing of macrodiamonds within a kimberlite body, thus making bulk sampling results a proxy |  | | Journal (article/letter/editorial) | | associated with the 148 Ma Group II Klipspringer kimberlite dyke system emplaced on the Thabazimbi-Murchison...(Westerlund et al., this volume). The Marsfontein kimberlite intrudes the Meinhardskraal basement granite...estimation of the nitrogen content and aggregation state as well as mantle residence temperatures are given...range in nitrogen concentration and aggregation state displayed by the low-T group (compare Figures 7...similar in nitrogen concentration and aggregation state to the Main Fissure and Sugarbird Blow diamonds |  | | Journal (article/letter/editorial) | | reducing as the EMOD buffer. Evaluation of the redox state of 225 garnet peridotite xenoliths from cratons...fluid are required to completely reset the redox state of depleted cratonic peridotite to that of the fluid...fluid. Consequently, the overall reduced state of diamond stable peridotites implies that the last fluids...Introduction Following the discovery of the first kimberlite hosted diamond deposits in South Africa in 1870-1871...formation was initially linked to reaction of the kimberlite magma with abundant carbonaceous shale fragments |  | | Book | | 193-256 137-208 129-192 209-264 193-256 [ [ COLORADO-Ill] 177-256 121-184 89-168 1-120 1-88 [ ...177-256 185-280 169-248 [ 425-528 337--400 COLORADO-II] 321--400 337--400 ARIZONA-Ill] 337--400...69-132 65-128 1-64 11 / 1980 20 I 1989 [ COLORADO-I] [ 289-352 385-448 [ AUSTRALlA] 353-504...Iaria from the Howard-Montgomery quarry, Howard County, Maryland (by J. S. White) 25:53-54 AFGHANISTAN...Iron-manganese phosphates of the Williams pegmatites, Coosa County, Alabama (by P. B. Leavens & T. A. Simpson) 6:66-73 |  | | Book | | ETERNITY A diamond is rarely found embedded in kimberlite rock. This picture at right suggests a genetic...Institute of Anieriea wanted to update its diamond mining and reeovery inlormation, we asked the assistance...the Ancient Past . 357 Part IV: The Magic of Kimberlite . 379 Part V: Genesis. 413 Index . 449 i\ ...Plate). 91 Cecil John Rhodes . 94 Diamond in kimberlite (Color Plate). 95 Dr Edna Plumstead . 97 Reconstruction...Map of South Africa . 133 Distribution of known kimberlite occurrences within the Kaapvaal Craton . 134 |  | | Book | | Laboratory, 5251 Broad Branch Road, N.W., Washington, District of Columbia 20015-1305 Abstract Cratons formed...there has been significant introduction from the kimberlite during eruption. Cratonic peridotites are depleted...subsequent metasomatic introduction of Re—from the kimberlite, for example—the apparent age of the peridotite...grains, less than 0.5 mm in diameter. Coarse phlogopite that appears to be in textural equilibration...has recrystallized in 0.1 to 0.3 mm neoblasts. Phlogopite occurs only in secondary CRATONIC PERIDOTITES |
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