 | | Journal (article/letter/editorial) | | Laurite from the Merensky Reef, Bushveld Complex, South Africa: “Hydrothermal” in Origin? Federica Zaccarini...Merensky Reef of the Bushveld layered intrusion, South Africa. The zoned laurite forms relatively large crystals...characterized by an unusual zoning that involves local enrichment of As, Pt, Ir, and Fe. Comparison in...Keywords: laurite; sulfides; fluids; platinum group elements (PGE); platinum group minerals (PGM); Merensky...Merensky Reef; Bushveld Complex; South Africa 1. Introduction Minerals of ruthenium are very rare and only five |  | | Report (issue) | | SURVEY OF SOUTH AFRICA COUNCIL FOR GEOSCIENCE GEOLOGICAL SURVEY OF SOUTH AFRICA MINERALOGY OF SOUTH AFRICA:... COUNCIL FOR GEOSCIENCE GEOLOGICAL SURVEY OF SOUTH AFRICA Scientific Editor R.D. Dixon Linguistic and...Council for Geoscience (Geological Survey of South Africa), 280 Pretoria Street, Silverton, Pretoria or..................... 50 4.2 Unidentified Non-Platinum-Group Phases .......................................................... 69 5.1 Overview of South African Occurrences ........................... |  | | Journal (article/letter/editorial) | | six months apart, define a precision (2a) of of platinum-groupelement(PGE) ore deposits.The osmiumisotoperatiosin...mines (Witwatersrand)and from the Amandelbult, Union, Frank, Waterval, and Klipfonteincon- ficiencytestsmadeusingpure...from sulfides with great conBushveld,thoughtwo erlichmanite grains(OsS2)were fidence, in the absenceof suitable...of thesesamples, the Oshydride the PresidentBrand mine were scannedfor high at masses 191 and 193 could...osmiridiumsof no more than _+0.15 Ga. Loraine gold mine 1 0.890 2 3 4 5 0.886, 1.367, 0.888, 0.887, |  | Yudovskaya, M., Belousova, E., Kinnaird, J., Dubinina, E., Grobler, D.F., Pearson, N. (2017) Re-Os and S isotope evidence for the origin of Platreef mineralization (Bushveld Complex) Geochimica et Cosmochimica Acta, 214. 282-307 doi:10.1016/j.gca.2017.07.029 | Journal (article/letter/editorial) | | University of the Witwatersrand, Wits 2050, South Africa Institute of Geology of Ore deposits, Petrography...Exploration & Geology, Ivanplats (Pty) Ltd, Mokopane, South Africa * Corresponding author email: marina.yudovskaya@wits...Abstract – The Bushveld Complex contains the largest platinum-group element (PGE) deposits of the world that...Re-Os isotope and elemental LA MC-ICPMS data on platinum-group minerals (PGM) from the mineralized reefs...INTRODUCTION Enormous reserves of chromium and platinum-group elements (PGE) in the Bushveld Complex together |  | | Journal (article/letter/editorial) | | Compositional Variations and Reflectance of the Common Platinum-Group Minerals* M. Tarkian Institute of Mineralogy...of the compositional variations of 22 different platinum-group minerals, of Os--Ir--Ru- and Pt--Fe alloys...and related spectral reflectance curves of the platinum-group minerals investigated significant correlations...in July, 1986. 170 M. Tarkian Introduction Platinum-group minerals (PGM) occur in primary and placer...8-10. Fig. 1. Sketch map showing location of the platinum-group mineral deposits studied Compositional |  | Oberthur, T., Melcher, F., Gast, L., Wohrl, C., Lodziak, J. (2004) DETRITAL PLATINUM-GROUP MINERALS IN RIVERS DRAINING THE EASTERN BUSHVELD COMPLEX, SOUTH AFRICA. The Canadian Mineralogist, 42 (2) 563-582 doi:10.2113/gscanmin.42.2.563 | Journal (article/letter/editorial) | | DETRITAL PLATINUM-GROUP MINERALS IN RIVERS DRAINING THE EASTERN BUSHVELD COMPLEX, SOUTH AFRICA THOMAS OBERTHÜR§...the eastern Bushveld, more than 6000 grains of platinum-group minerals (PGM) were recovered from alluvial...Keywords: platinum-group minerals, placer, Maandagshoek, eastern Bushveld Complex, South Africa. SOMMAIRE... INTRODUCTION The initial major discovery of platinum in the Bushveld Complex, which subsequently led...Bushveld Complex that produced unknown amounts of platinum. However, as mining commenced on the rich pipes |  | | Report (issue) | | Geochemistry, Mineralogy and Mineral Beneficiation of Platinum-Group Elements Edited by Louis J. Cabri Ottawa...PETROLEUM Suite 1210, 3400 de Maisonneuve Boulevard West Montréal, Québec, Canada H3Z 3B8 ISBN 1-894475-27-5...as follows in this example: OBERTHÜR, T., 2002. Platinum-group element mineralization of the Great Dyke...Geochemistry, Mineralogy and Mineral Beneficiation of Platinum-Group Elements. Edited by L.J. Cabri. Canadian... Preface Background The need for a new book on the platinum-group elements (PGE) became apparent about four |  | | Report (issue) | | Series: Mineral Group: Forms a series with erlichmanite. Pyrite group. Occurrence: In ultramafic...Cooperite, braggite, sperrylite, other minerals of the platinum-group elements, Distribution: From placers in...Kalimantan (formerly Pontijn, Tanah Laut) [TL]. In South Africa, from the Merensky Reef of the Bushveld complex...complex, at Potgietersrus; in the Rustenburg and Union mines; also the Driekop and Onverwacht mines. In...chemistry, reflectance, and cell size of the erlichmanite (OsS2 ) – laurite (RuS2 ) series. Mineral. Mag |  | | Journal (article/letter/editorial) | | immediately surrounding Bushveld rocks, followed by local redistribution of Pb by whatever fluid was present...reflecting it economic importance as a host for platinum group element (PGE), Cr, and V ore deposits, its...Provinces of South Africa in the east to the Northwest Province bordering Botswana in the west (Fig. 1).... 2006). The layered rocks, also known as the Rustenburg Layered Series, formed by multiple injections...arching limbs, one in the east and the other in the west, which together constitute a strike length of about |  | | Journal (article/letter/editorial) | | the Bushveld Complex, University of Pretoria, South Africa With 2 Figures Received March 16, 1993; accepted...growth process. It is widely accepted that certain platinum-group minerals crystallized directly from the...encounter of certain platinum-group minerals, particularly laurite, but also erlichmanite and various Os-Ir...Lipin, 1986; Merkle, 1989 and 1992). Inclusions of platinum-group minerals in cumulus silicate minerals are...dictate that both chromite and early magmatic platinum-group minerals would be concentrated in the boundary |  | Baurier-Aymat, Sandra, Jiménez-Franco, Abigail, Roqué-Rosell, Josep, González-Jiménez, José María, Gervilla, Fernando, Proenza, Joaquín A., Mendoza, Joan, Nieto, Fernando (2019) Nanoscale Structure of Zoned Laurites from the Ojén Ultramafic Massif, Southern Spain. Minerals, 9 (5) 288 doi:10.3390/min9050288 | Journal (article/letter/editorial) | | zoned laurite (RuS2 )-erlichmanite (OS2 ) in mantle-hosted chromitites. These platinum-group minerals form...fringes (10–20 nm thickness) of almost pure erlichmanite (OsS2 ). Core-to-rim microscale zoning in laurite...formation/preservation of nanoscale domains of erlichmanite in laurite. Our observation highlights for the...the genesis of platinum-group minerals in magmatic ore-forming systems. Keywords: Platinum-group minerals;...minerals; chromitite; zoned laurite-erlichmanite; nano-mineralogy; focused ion beam; transmission electron |  | | Book | | revised edition) 2 2 . N. DEKUN MINERAL ECONOMICS OF AFRICA 2 3 . B.L GULSON LEAD ISOTOPES IN MINERAL EXPLORATION...Ores DEVELOPMENTS IN ECONOMIC GEOLOGY, 2 6 platinum-group element exploration Dennis L. Buchanan Department...will never be spoken. " P. A. WAGNER, The platinum South Africa deposits so be alluring prophesied and... Foirewoird. The platinum-group elements rhodium, ruthenium, (PGE) include platinum, iridium and osmium...as well a s major industrial uses. a permanent Platinum has aesthetic qualities, combined lustre, which |  | | Journal (article/letter/editorial) | | (2009) 5635–5645 www.elsevier.com/locate/gca Platinum-group mineral formation: Evidence of an interchange...Ural/Alaskan-type and layered intrusions. The nature of platinum-group elements is debated, i.e., whether they...better understanding of the genetic processes for platinum-group mineral (PGM) formation. The aim of the...species. The literature on the grain sizes (r) of platinum-group minerals (PGM) and their formation temperatures...controlling the deposition of platinum-group elements (PGE) and the formation of platinum-group minerals (PGM) |  | | Journal (article/letter/editorial) | | Springer-Verlag 1997 Printed in Austria Review of platinum-group mineralogy: compositions and elemental associations...Applied Geology, University of Natal, Durban, South Africa With 4 Figures Received February 2, 1996; accepted...February 20, 1997 Summary There are 96 approved PG (platinum group) - mineral species and more than 500 unidentified...varying concentrations of one or more of the six platinum group elements. The PG-minerals commonly have...pronounced antipathy with other PG-elements, whereas platinum exhibits the most marked sympathetic tendencies |  | Naldrett, A J, Brownscombe, W, Herrington, R, Wilkinson, J, Berry, A, Coppard, J, Klatt, S, Kekana, S, Grobler, D, Phipps, M, Dunnett, T, Hadebe, D, Nielsen, S, Broughton, D, Kojonen., K K, Montjoie, R, van Rooyen, N, Reichhardt, F, Nex, P A M, Holwell, D A, Boyce, A J, Jones, A, Holwell, D A, Jones, R E, McDonald, I, Prichard, H M, Yudovskaya, M, Kinnaird, J A, Sobolev, A, Kuzmin, D, Wilson, A (2011) Abstracts. Applied Earth Science, 120 (4) 198-210 doi:10.1179/1743275812y.0000000015 | Journal (article/letter/editorial) | | most valuable products and a second in which the platinum-group element (PGE) are the most important. The...body trends roughly east-west and plunges to the west. It is overlain in the west by a coarse breccia and...Broughton Ivanplats Ltd, 82 Maude St, Sandton 2146, South Africa Ivanplats Ltd’s Platreef project is located...Northern Limb occurs in the Platreef, a sequence of west-dipping mafic–ultramafic intrusions that form the...zone’. This zone is poorly developed within the west-dipping near-surface part of the Platreef, but forms |  | Coggon, J.A., Nowell, G.M., Pearson, D.G., Oberthür, T., Lorand, J.-P., Melcher, F., Parman, S.W. (2012) The 190Pt–186Os decay system applied to dating platinum-group element mineralization of the Bushveld Complex, South Africa. Chemical Geology, 302. 48-60 doi:10.1016/j.chemgeo.2011.10.015 | Journal (article/letter/editorial) | | applied to dating platinum-group element mineralization of the Bushveld Complex, South Africa J.A. Coggon a...Department of Earth Sciences, Durham University, South Road, Durham DH1 3LE, UK Federal Institute for Geosciences...useful geochronometric tool for direct dating of platinum-group minerals (PGM) in large mafic/ultra-mafic...geochronologically well constrained Bushveld Complex, S. Africa. Mixed PGM (laurite, cooperite, laurite–platarsite...the world's platinum resources, as well as the majority of the other accessible platinum-group elements |  | | Report (issue) | | Platinum-Group Elements Chapter N of Critical Mineral Resources of the United States—Economic and Environmental...9 rhenium 186.2 osmium 190.2 iridium 192.2 platinum 195.1 gold 197.0 mercury 200.5 thallium 204...gov/images/periodictable.pdf. Cover. Stillwater Mine in south-central Montana, looking southeast. The pond...offices. Photograph by Michael L. Zientek, 2006. Platinum-Group Elements By Michael L. Zientek, Patricia...H.L., Schulte, R.F., and Seal, R.R., II, 2017, Platinum-group elements, chap. N of Schulz, K.J., DeYoung |  | | Report (issue) | | mineralogy and deposits Definition and characteristics Platinum (Pt) is one of a group of six chemical elements...elements collectively referred to as the platinum-group elements (PGE). The other PGEare palladium (Pd), iridium(lr)...ruthenium(Ru). Reference is also commonly made to platinum-group metals and to platinumgroup minerals, both...to PGM. In this document we use PGM to refer to platinum-group minerals. Pt Atomic weight Atomic number...2.5-3 properties vary considerably (Table 1). Platinum, iridium and osmium are the densest known metals |  | | Journal (article/letter/editorial) | | pp. 637–651 IMAGE ANALYSIS AND COMPOSITION OF PLATINUM-GROUP MINERALS IN THE J-M REEF, STILLWATER COMPLEX...were conducted on mineralized samples from the platinum-group element (PGE)–bearing J-M reef, Stillwater...sulfides, silicates, and secondary magnetites. The platinum-group minerals (PGM) observed in the studied samples...layered intrusions, such as the Bushveld Complex (South Africa) and the Stillwater Complex (Montana) contain...stratiform layers, or “reefs,” which are enriched in platinum-group elements (PGE). In both the Bushveld and |  | | Journal (article/letter/editorial) | | EconomicGeology Vol 77, 1982,pp. 1848-11366 The Platinum-GroupChemistryand Mineralogyof the UG-2 Chromitite...concentrationsof the platinum-groupelementsin Bushveldmagmas. More than6,000grainsof platinum-group mineralswere...chalcopyrite,pyrrhotite,and pyrite. Variation in the platinum-groupmineral assemblages can be explainedby variationsin...andthechemicalvariationsin platinum-groupelementsplusgoldcontents PRODUCTION of platinum-groupelements(PGE) in...layercontains justover50 percentof the plati- ingthe platinum-group mineralogyof the UG-2 layer num-group elementresources |  | | Journal (article/letter/editorial) | | mineralogy, geochemistry and genesis of the alluvial platinum-group minerals of the Freetown Layered Complex...Peninsula, Sierra Leone have been examined for their platinum-group mineral (PGM) content. The alluvial PGM...cooperite–vysotskite (PtS–PdS), laurite (RuS2), erlichmanite (OsS2), Os-Ir alloy, Os-Ru alloy and native...E-mail: john.bowles@manchester.ac.uk Keywords: Platinum-group minerals • Freetown Intrusion, Sierra Leone...hills of the Freetown Peninsula, Sierra Leone, W Africa were first found in 1926 (Junner, 1929, 1930; Pollet |  | | Journal (article/letter/editorial) | | Abstract. Osmium isotope ratios for two types of platinum group mineral (PGM) nuggets of eluvial (residual)...in-situ using an ion microprobe. The values for erlichmanite nuggets are ~ 1.08. Those for P G M inclusions...nuggets. The data suggest early formation of the erlichmanite nuggets, prior to a postulated substantial contribution...depositional environments. Introduction The origin of platinum nuggets is controversial. Proposed models for...processes. Difficulties in finding a nugget-size platinum group mineral (PGM) in mafic igneous rocks and |  | | Journal (article/letter/editorial) | | minerals Review The Fate of Platinum-Group Minerals in the Exogenic Environment—From Sulfide Ores via...into Placers: Case Studies Bushveld Complex, South Africa, and Great Dyke, Zimbabwe Thomas Oberthür Bundesanstalt...the platinum-group minerals (PGM) in the weathering cycle in the Bushveld Complex of South Africa and...particles, small The world’s prime sources of platinum-group (PGE) are layered intrusions of Proterozoic...PGM and Archean age (e.g., Bushveld Complex, South Africa; the Great Dyke, Zimbabwe; the Stillwater grains |  | | Book | | Innovative and Applied Research on Platinum-Group and Rare Earth Elements Dedicated to the Work and Memory...Research on Platinum-Group and Rare Earth Elements Innovative and Applied Research on Platinum-Group and...Special Issue “Innovative and Applied Research on Platinum-Group and Rare Earth Elements” Reprinted from:...Makshakov, Nikolay V. Bryansky and Nikolay V. Smagunov Platinum Group Elements in Arsenopyrites and Pyrites of...Laurite from the Merensky Reef, Bushveld Complex, South Africa: “Hydrothermal” in Origin? Reprinted from: Minerals |  | Gervilla, F., Proenza, J.A., Frei, R., González-Jiménez, J.M., Garrido, C.J., Melgarejo, J.C., Meibom, A., Díaz-Martínez, R., Lavaut, W. (2005) Distribution of platinum-group elements and Os isotopes in chromite ores from Mayarí-Baracoa Ophiolitic Belt (eastern Cuba) Contributions to Mineralogy and Petrology, 150 (6) 589-607 doi:10.1007/s00410-005-0039-2 | Journal (article/letter/editorial) | | R. Dı́az-Martı́nez W. Lavaut Distribution of platinum-group elements and Os isotopes in chromite ores...43–0.55) to high Cr (Cr#=0.60–0.83) compositions. Platinum-group element (PGE) contents are also variable...which is dominated by members of the laurite– erlichmanite solid solution series (RuS2–OsS2), with minor... the extent of melt-rock interactions, and the local sulfur fugacity. Small-scale (lm to cm) chemical...chemical and isotopic heterogeneities in the platinum-group minerals are controlled by the mechanism(s) of chromite |
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