 | | Journal (article/letter/editorial) | | 2310, Australia AND G. DUNCAN Rimfire Pacific Mining NL, Room 810, 530 Little Collins Street, Melboure...modern drainage system and soils in the Bingara district was undertaken to search for a hard-rock diamond...the low metamorphic grade country rock in the district. Using the major element classification scheme...in diamonds from Sloan diatremes in Colorado and Wyoming and the Finsch kimberlite pipe, South Africa...crystallographic exsolutions of rutile, apatite, or ilmenite in some eclogitic and Fe-Mn–enriched Bingara garnets |  | | Journal (issue) | | Page Diamonds in Colorado! The State Line Kimberlite District, Colorado & Wyoming, USA By Philip Persson...Mineralogy and History of Silver Deposits in the Calico District, California By Jeremy Zolan, jzolansci@gmail.com...Macdonald Bernard Makowski Jane Mannon Maricopa Mining John Marshall Stephanie Martin Miyairi Masumi ...Tonkacheev Robert Tripp Bruce Ueno Malcolm Uffelman UK Mining Ventures Paul Vela Earl Verbeek Yannick Verbelen...Zzyzx Diamonds in Colorado! The State Line Kimberlite District, Colorado & Wyoming, USA Philip Persson |  | | 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) | | Syngenetic diamond inclusions from the Mwadui kimberlite reveal that an unusually fertile section of lithospheric...inclusions, (i.e. primary solution of c-olivine) and an ilmenite inclusion with an eskolaite (Cr2O3) component...Mwadui Mine has the scope to provide data on the state of the lithospheric upper mantle beneath Tanzania...Williamson Mine) in Western Tanzania is the largest kimberlite pipe in the world (146 ha) and lies within an...two Mwadui garnets the common high sodium trend line supports primary crystallisation from a similar |  | Davies, Rondi M., Griffin, William L., O'Reilly, Suzanne Y., Doyle, Buddy J. (2004) Mineral inclusions and geochemical characteristics of microdiamonds from the DO27, A154, A21, A418, DO18, DD17 and Ranch Lake kimberlites at Lac de Gras, Slave Craton, Canada☆. Lithos, 77 (1) 39-55 doi:10.1016/j.lithos.2004.04.016 | Journal (article/letter/editorial) | | Sydney NSW 2109, Australia b CSIRO Exploration and Mining, P.O. Box 136, North Ryde, NSW 1670, Australia...isotope, nitrogen content, nitrogen aggregation state and morphological study of 576 microdiamonds from...abundances are similar to macrodiamonds from the DO27 kimberlite (Davies, R.M., Griffin, W.L., O’Reilly, S.Y....), The J. B. Dawson Vol., Proc. 7th Internat. Kimberlite Conf., Red Roof Designs, Cape Town, pp. 148 –...Diamonds from the Panda Kimberlite, S. P., Canada. 8th International Kimberlite Conference, extended abstracts) |  | | Journal (article/letter/editorial) | | magnesiowustite [(Fe,Mg)O] from Koffiefontein, Monastery, and Sloan were later reported by Moore et al. (1986). This... (1986) Arkansas, USA Orroroo, S. Australia Monastery, S. Africa Sloan, Colorado Periclase + magnetite...(23), ferropericlase + SiO2 (1), ferropericlase + ilmenite (2); ferropericlase + ‘‘olivine’’ (1), ferropericlase...(1999) Koffiefontein, S. Africa Monastery, S. Africa Sloan Sao Luiz, Brazil McDade and Harris (1996) Kopylova...1>y>x>z>0 [Note that O2 in Reaction (1) is in solid state.] Reaction (1) yields both ferropericlase and diamond |  | Sobolev, Nikolai V., Logvinova, Alla M., Zedgenizov, Dmitry A., Pokhilenko, Nikolai P., Kuzmin, Dmitry V., Sobolev, Alexander (2008) Olivine inclusions in Siberian diamonds: high-precision approach to minor elements. European Journal of Mineralogy, 20 (3) 305-315 doi:10.1127/0935-1221/2008/0020-1829 | Journal (article/letter/editorial) | | eclogites in kimberlites. In primary, diamond-bearing kimberlite and lamproite rocks the ratio of diamonds from...minor elements, Siberian Craton, peridotite, kimberlite. Introduction Oceanic crust subduction and recycling...Olivine xenocrysts and phenocrysts in unaltered kimberlite are also characterized by high forsterite contents...included in diamonds from several major Yakutian kimberlite mines as well as from alluvial deposits of the...reflects the absolutely unique, unaltered state of the kimberlite from Udachnaya East pipe, containing no |  | | 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...Cr-pyrope garnet (both lherzolitic and harzburgitic), ilmenite, Ni-rich sulfide and a Ti-Cr-Fe-Mg-Sr-K phase...Ni-poor sulfide, phlogopite and rutile. Peridotitic ilmenite inclusions have high Mg, Cr and Ni contents and |  | | 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 TiO2)...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...INTRODUCTION Titanium minerals in kimberlite are mostly represented by ilmenite (Fe,Mg)TiO3 and perovskite CaTiO3; |  | | 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) | | 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 |  | | Report (issue) | | Series 30 Bibliography and Index of Colorado Geology, 1984-1989 Colorado Geological Survey Department of...Resources Denver, Colorado 1990 Information Series 30 Bibliography and Index of Colorado Geology, 1984-1989...Institute under contract to the Colorado Geological Survey Colorado Geological Survey Department of...of Natural Resources Denver, Colorado 1990 ii FOREWORD In recognition of the need to more effectively...published literature on the state's geology, the Colorado Geological Survey is pleased to release Information |  | | Journal (article/letter/editorial) | | extant at the time of emplacement of the host kimberlite or lamproite. Some inclusions record thermal...celui qui existait lors de la mise en place de la kimberlite ou la lamproïte hôte, voire même plus froid que...and would therefore reflect the ambient thermal state of the mantle at the time of eruption. Taking into...inclusions selected fall above or immediately below the line used by Nimis (1998) to separate diopside in garnet...in diamond pertain to diamond from the classic kimberlite fields of the Kaapvaal (southern Africa) and |  | Kaminsky, F., Zakharchenko, O., Davies, R., Griffin, W., Khachatryan-Blinova, G., Shiryaev, A. (2001) Superdeep diamonds from the Juina area, Mato Grosso State, Brazil. Contributions to Mineralogy and Petrology, 140 (6) 734-753 doi:10.1007/s004100000221 | Journal (article/letter/editorial) | | Superdeep diamonds from the Juina area, Mato Grosso State, Brazil Received: 29 May 2000 / Accepted: 30 October...inclusion in the Juina diamonds. It coexists with ilmenite, Cr-Ti spinel, a phase with the major-element...one diamond, associated with CaTiperovskite, Mn-ilmenite and an unidenti®ed Si-Mg phase. Neither Cr-pyrope...2109, Australia W. L. Grin CSIRO Exploration and Mining, P.O. Box 128, North Ryde, NSW 1609, Australia...in Ti (Cr2O3<36.5 wt%, and TiO2>10 wt%). Most ilmenite inclusions have low MgO contents, and some have |  | | Journal (article/letter/editorial) | | 2003; accepted 27 March 2003 Abstract The thermal state of the upper mantle beneath tectonic structures...Thermal gradients; Thermal state 1. Introduction The study of the thermal state of the continental mantle...structures are different and whether the thermal state of the mantle correlates with the type and age of...belts and in rifts. In this paper, the thermal state of the mantle is characterized by geotherms in significant...(Fig. 2) are presented. They establish the thermal state of the lithospheric mantle underlying Precambrian |  | | Journal (article/letter/editorial) | | Copyright © 1998 Elsevier Science Ltd Printed in the USA. All rights reserved 0016-7037/98 $19.00 1 .00 Pergamon...Pergamon PII S0016-7037(98)00105-7 Redox state of Earth’s upper mantle peridotites under the ancient...ancient cratons (Ballhaus, 1993). The oxidation state of garnet lherzolites has not been extensively studied...fluid-saturated solidus (Wylie, 1987). The oxidation state of the mantle has been a source of recent controversy...Oxygen Barometer As is well known, the oxidation state of the mantle assemblage can be estimated by reactions |  | | 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 |  | 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) | | and E-type parageneses. Bimineralic eclogites, ilmenite eclogites, coesite + corundum + kyanite eclogites...inclusions in diamonds but, with a few exceptions (ilmenite and coesite eclogites), also as diamondiferous...extreme ly variable in their parageneses. The Mir kimberlite pipe in Yakutia is the best example for such...or without rutile, mica, or rarely, sanidine), ilmenite, coesite, kyanite, and corundum eclogites. The...pyroxenite and websterite from the Udachnaya kimberlite were described by Ponomarenko et al. (1980). |  | 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...for analysis; one of these contained a visible ilmenite inclusion (sample #1.1). The investigated diamond |  | Griffin, William L., Huang, Jin-Xiang, Thomassot, Emilie, Gain, Sarah E. M., Toledo, Vered, O’Reilly, Suzanne Y. (2018) Super-reducing conditions in ancient and modern volcanic systems: sources and behaviour of carbon-rich fluids in the lithospheric mantle. Mineralogy and Petrology, 112. 101-114 doi:10.1007/s00710-018-0575-x | Journal (article/letter/editorial) | | monotonic trend significantly increase the oxidation state W. L. Griffin et al. of depleted cratonic peridotites...pyroxenites, and megacrysts of clinopyroxene, ilmenite, zircon and corundum. Over the last decade, the...(Marshintsev 1990), the North China Craton (Fuxian kimberlite; Leung 1990), the Argyle lamproite in Australia...1989), Juina, Brazil (Hutchison 1997), the Sloan diatremes in North America and Monastery Mine in South...in microdiamond residues from the Swartruggens kimberlite (South Africa). The Ti-corundum+SiC association |  | Griffin, W. L., Win, T. T., Davies, R., Wathanakul, P., Andrew, A., Metcalfe, I., Cartigny, P. (2001) Diamonds from Myanmar and Thailand: Characteristics andPossible Origins. Economic Geology, 96 (1) 159-170 doi:10.2113/gsecongeo.96.1.0159 | Journal (article/letter/editorial) | | and Mining, North Ryde, New South Wales 2113, Australia T. T. WIN, CSIRO Exploration and Mining, North...Myanmar. The Momeik diamonds are recovered during mining of gemstone gravels; the Theindaw and Phuket diamonds...history, nitrogen concentration and aggregation state, and isotopic composition of diamonds from Myanmar...(pyrope garnet, chrome diopside, chromite, magnesian ilmenite) associated with the diamonds suggests that kimberlitic...(compilation of pub. data; Davies, 1998). The solid line separates the two parageneses at >90 percent confidence |  | | 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) | | 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... eskolaite (Cr), tephroite (Mn), albite (Na), ilmenite (Ti), and bunsenite (Ni). Detection limits in...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 |  | | 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 |  | Griffin, W. L., Jaques, A. L., Sie, S. H., Ryan, C. G., Cousens, D. R., Suter, G. F. (1988) Conditions of diamond growth: a proton microprobe study of inclusions in West Australian diamonds. Contributions to Mineralogy and Petrology, 99 (2) 143-158 doi:10.1007/bf00371457 | Journal (article/letter/editorial) | | omphacite, coesite, kyanite, rutile, sulfide, ilmenite and moissanite (SIC). The garnets show a wide...Floating Point Systems AP-120B array processor, for off-line analysis. 2. Thick target trace element analysis...then be calculated for each characteristic X-ray line of each element in the matrix of thick targets...To extract peak areas, spectra are fitted using a line-shape for each element consisting of Gaussians of...background plus variable-intensity element line-shapes, a pileup line-shape generated dynamically during the |
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