 | | Journal (article/letter/editorial) | | FROM THE ONVERWACHT AND TWEEFONTEIN ULTRAMAFIC PIPES, EASTERN BUSHVELD COMPLEX, SOUTH AFRICA FEDERICA...Witwatersrand, PO Wits 2050, South Africa ABSTRACT The ultramafic pipes of Onverwacht and Tweefontein, in the...the eastern part of the Bushveld Complex, in South Africa, contain small xenoliths of chromitite that...assemblage), b) abundant alloys (isoferroplatinum, ruthenium) and Rh–Pd–Ru arsenides (cherepanovite, ruthenarsenite...Complex, Republic of South Africa. SOMMAIRE Les pipes ultramafiques de Onverwacht et Tweefontein, dans |  | | Journal (article/letter/editorial) | | PLATINUM-GROUP MINERALS FROM THE BUSHVELD COMPLEX, SOUTH AFRICA T. OBERTHÜR Bundesanstalt für Geowissenschaften...ac.at © 2014 December Geological Society of South Africa ABSTRACT The present work provides an initial...Complex, and from eluvial concentrations at the Onverwacht platiniferous pipe. During a field campaign,...transport. The eluvial material collected at Onverwacht contained ca. 150 PGM grains with sizes mainly...PGM assemblage described previously from the Onverwacht pipe proper, including the type locality minerals |  | | 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........................... 69 5.1 Overview of South African Occurrences ..............................LAYEREDSUITE,BUSHVELDCOMPLEX.... 111 MINERALOGY OF SOUTH AFRICA: TYPE-MINERAL SPECIES AND TYPE-MINERAL NAMES |  | | Report (edition) | | bookseller 1936 Price 3s. Net IMPERIAL INSTITU1··E SOUTH KENSINGTON, S.W. 7 Ts E~ Imperial Institute was...Protecto1·ate .. Southe1n Rhodesia • • • • Union of South Africa • • • • Canada .. •• • • • • Newfoundland •...includes platinum, palladium, iridium, rhodium, ruthenium and osmium. Platinum is the principal member,...Empire, especially in Canada and the Union of South Africa. During 1913, Russia was responsible for over...the list of producers of the platinum metals. South Africa has large reserves of platinum ore, and is the |  | | Journal (article/letter/editorial) | | concentrates originating from the Driekop platinum mine, South Africa, collected and first described by E. F. Stumpfl...sulpharsenides, stibiopalladinite, moncheite, ruthenium, osmium, and laurite. “Exotic” minerals comprise...interpretation of Rudashvesky et al. (1992) for the Onverwacht and Mooihoek pipes: a high-temperature magmatic...of discovery are summarize d in Table 1. The Onverwacht platiniferous pipe is the type locality of tetraferroplatinum...crosscutting the Upper Critical Zone, and the Onverwacht and Twyfelaar pipes in the Lower Critical and |  | | Report (issue) | | ___________________________________ _ Sudbury district _______________________ ~ Discovery and present...lacers-------------------------------Tulameen district __________________ _ Other placers ______________________...provinces ___________________________ _ Republic of South Africa ___ ------------- __ -----Transvaal and Orange...ores ____________ _ Placers of the Witwatersrand district __ History and production _____________ _ General...---------------N oril'sk district ____________ -----_---- _____ _ Petsamo district ___________________________ |  | | Journal (article/letter/editorial) | | sperrylite, platinum-iron-, iridium-osmium- and ruthenium-iridium-osmium alloys were investigated for their...iridium-osmium-sulfide of the erlichmanite s.s.s., ruthenium-osmium-iridium alloys, platinum-iron alloys, iridium-bearing...erlichmanite, platinum-iron alloys, osmium and ruthenium (Cabri 1981, Cabri & La- © 2010 E. Schweizerbart’sche...alloys (argentocuproaurite) Gold amalgam 7 Ruthenium-iridiumosmium alloys perfect {0001} perfect...Osmium-bearing particles Platinum-bearing particles Ruthenium-bearing particles Rhodium-bearing particles b) |  | | Report (issue) | | Pd0.03 Os0.02 )Σ=1.05 As0.95 . (2) Onverwacht mine, South Africa; by electron microprobe, corresponding...China. In the Onverwacht mine, on the Merensky Reef, Bushveld complex, Transvaal, South Africa. Name: For...For RUTHENium and ARSENic in the composition. Type Material: Canadian Museum of Nature, Ottawa, Canada...of the natural alloys of osmium, iridium and ruthenium based on new compositional data of alloys from |  | | Journal (article/letter/editorial) | | olCuruthenium ruthenian iridium osmiridium osmiridium iridosmine...t - p o o r a n d r e p r e s e n t s iridian ruthenium w i t h a c o m p o s i t i o n close to the u...Osmiridium Rutheniridosmine 7> This paper Iridian Ruthenium J PICOT& JOHAN,1977 ~ , I , i , I ' I...osmium, iridosmine, ruthen-iridosminc, iridian ruthenium (all hexagonal) and osmiridium and iridium (both...V:SE Borneo ($tumpfl 8, Torkian 1973) lII : Driekop Mine, Bushveld (Torkian¢$tumpf11975 I l,]I; $orashigawo |  | | Report (issue) | | = 5.777 Z=1 X-ray Powder Pattern: Onverwacht mine, South Africa. 3.32 (100), 2.87 (100), 1.74 (100)...11.47 Total 98.3 98.7 100.42 (1) Driekop mine, South Africa; by electron microprobe, corresponding to...Occurrence: In chromite in hortonolite dunite (South Africa); as inclusions in chrompicotites (Bulgaria);...Distribution: In South Africa, in the Merensky Reef, Bushveld complex, Transvaal, from the Onverwacht [TL] and...at Werner Lake and Sudbury, Ontario, and the Pipe mine, in Manitoba. From the Anduo chromite deposit, Tibet |  | | Report (issue) | | 769–5.797 Z=4 X-ray Powder Pattern: Onverwacht mine, South Africa (ruthenian). 3.31 (10), 2.87 (10), 1...14.99 Total 99.4 100.0 100.19 (1) Driekop mine, South Africa; by electron microprobe, corresponding to...geversite, erlichmanite, irarsite, Pt–Fe alloys (South Africa); chalcopyrite, cobaltite, gersdorffite, pyrrhotite...economically important platinum-group mineral. In South Africa, in the Merensky Reef, Bushveld complex, Transvaal...Transvaal, from the Driekop [TL], Onverwacht, and Tweefontein mines. In the Upper and Banded zones of the |  | | Journal (article/letter/editorial) | | Applied Geology, University of Natal, Durban, South Africa With 4 Figures Received February 2, 1996; accepted...moncheite-merenskyite-melonite 9. platinum-iridium 10. osmium-ruthenium 11. sobolevskite-sudburyite 12. sperrylite,geversite...and braggite/vysotskite, osmium and iridium, ruthenium and iridium, osmium and platinum. N o n - P G...and Ohnenstetter (1992) Cabri et al. (1981) Ruthenium Awaruite Bornite Cobaltite Gersdorffite Pentlandite...Rutheniridosmine [47.5] [47.0] 1.11 5.54 3.12 [47.0] Ruthenium 39.9 49.7 2.8 12.8 14.69 [100] Shuangfengite |  | | Journal (issue) | | first discovered by the Spaniards in Colombia, South America, in 1735, where the metal was collected...comprises six elements: platinum, iridium, osmium, ruthenium, rhodium, and palladium. Platinum, iridium, and...heaviest element that occurs in nature. Densities of ruthenium, rhodium, and palladium average only 55 percent...regia or other inorganic acids, and osmium and ruthenium are quite insoluble in such acids. Palladium is...include those at Merensky Reef, Rustenburg, South Africa. 143 In the late magmatic phase, platinum |  | | Journal (article/letter/editorial) | | homepage: http://www.tandfonline.com/loi/tigr20 Ruthenium- and rhodium-containing pentlandite - an indicator...Genkin , I.P. Laputina & G.N. Muravitskaya (1976) Ruthenium- and rhodium-containing pentlandite - an indicator...Santa Barbara] Date: 08 June 2016, At: 20:16 Ruthenium- and rhodium-containing pentlandite an indicator...associated with them were studied by the method of local X-ray speetrographic analysis of the "Cameca" MS-46... Irarsite was first found in the Onverwacht deposit, South Africa (Genkin et a l . , 1966). Later it |  | | Journal (article/letter/editorial) | | found in Pt concentratesfrom the Driekop mine, South Africa. Other data on hollingworthite are derived...(Tarkian and Stumpfl, 1975) and the Onverwacht mine, South Africa (Genkin, 1968). Hollingworthite is also...M. (1977) Platinum-group t699 minerals from Onverwacht, II. Platarsite, a new sulfarsenide of platinum...platinum-group minerals in the Witwatersrand,South Africa. Economic Geology, 7 1, 1399-1428. Genkin, A...from the Osthammeren ultramafic tectonite body, south central Norway. Mineralogy and Petrology,42, 249-263 |  | | Report (issue) | | (Pd), iridium(lr), osmium (Os), rhodium (Rh) and ruthenium(Ru). Reference is also commonly made to platinum-group...and irid ium are more difficult to work, while ruthenium and osmium are hard, brittle and almost pentlandite...only a few microns in size. It is Iridium and ruthenium are traded in sma ll quantities significant to...billion (ppb), by weight. Rhodium, iridium and ruthenium are even scarcer at about 1 ppb. Relative to other...proportions of individual PGE within a deposit or a district. processes are also known but these are of relative |  | | Journal (article/letter/editorial) | | Archean spherule beds, Barberton Mountain Land, South Africa: evidence for origin by impact doubtful Christian...Witwatersrand, P.O. Wits, Johannesburg 2050, South Africa Received November 17, 1992; revision accepted...layers in the ~ 3.4 Ga Barberton Greenstone Belt, South Africa, have been interpreted as being the result of...Transvaal, South Africa. The belt includes a lower, predominantly volcanic sequence, the Onverwacht Group...throughout both the volcanic and sedimentary (Onverwacht and Fig Tree) sequences. Several authors have |  | | Report (issue) | | Data: Orthorhombic. Point Group: 2/m 2/m 2/m. ruthenium. As inclusions to 70 μm in native Physical Properties:...xenoliths in ultramafic pipes (South Africa). Association: Ruthenium, isoferroplatinum, cherepanovite...In the Onverwacht and Tweefontein ultramafic pipes, eastern Bushveld Complex, in South Africa. In Umsweswe |  | | Book | | revised edition) 2 2 . N. DEKUN MINERAL ECONOMICS OF AFRICA 2 3 . B.L GULSON LEAD ISOTOPES IN MINERAL EXPLORATION...never be spoken. " P. A. WAGNER, The platinum South Africa deposits so be alluring prophesied and mines... Foirewoird. The platinum-group elements rhodium, ruthenium, (PGE) include platinum, iridium and osmium...converters to be fitted to new cars. At present, South Africa and the USSR are the sources of most of the...world's newly mined PGE, with virtually all the South African production derived from the Bushveld Complex |  | | Report (issue) | | Kalimantan (formerly Pontijn, Tanah Laut) [TL]. In South Africa, from the Merensky Reef of the Bushveld complex...Rustenburg and Union mines; also the Driekop and Onverwacht mines. In the USA, in the Stillwater complex...Structure refinement of pyrite-type ruthenium disulfide, RuS2 , and ruthenium diselenide, RuSe2 . Acta Cryst |  | | 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...Reef; Bushveld Complex; South Africa 1. Introduction Minerals of ruthenium are very rare and only five...ruarsite RuAsS, ruthenarsenite (Ru,Ni)As, and ruthenium (Ru,Ir,Os), have been approved by the International |  | | Report (volume) | | in Magnetic Concentrates from the· Goodnews Bay District, Alaska By SAM ROSENBLUM, R. R. CARLSON, j. M...in magnetic concentrates from the Goodnews Bay district, Alaska. (U.S. Geological Survey Bulletin ; 1660)...southwestern Alaska showing location of Goodnews Bay district 3 Photograph of the Kevex screen showing the results...different groups of samples from the Goodnews Bay district 23 SEM micrograph of the lower left part of figure...preliminary magnetic concentrates from the Goodnews Bay district, Alaska 6 Results of semiquantitative spectrographic |  | | Journal (article/letter/editorial) | | Accord NiO body in the Barberton greenstone belt, South Africa Marian Tredoux a,⁎, Frederick Roelofse a, Alexander...the Free State, PO Box 339, Bloemfontein 9300, South Africa Scripps Institution of Oceanography, University...north-western part of the Barberton greenstone belt, South Africa, in the 1920s. With mineralogy and geochemistry...the material for nearly 50 years. In the 1960s South African mineralogist S. de Waal became aware of...confirmed as still being there in the mid-1970s by local geologists (e.g. J. Woolfe, pers. comm., 2012), |  | | Journal (article/letter/editorial) | | University of the Witwatersrand, P.O. Wits 2050, South Africa email: hart@schonlan.src.wits.ac.za Iain McDonald...Sciences, University of Cape Town, Rondebosch 7700, South Africa email: mtd@geology.uct.ac.za, maarten@cigc.uct...Andreoli South African Nuclear Energy Corporation, P. O. Box 582, Pretoria, 0001, South Africa email: marco@necsa...2050, South Africa email: ashwall@geosciences.wits.ac.za © 2004 Geological Society of South Africa ABSTRACT...Mesoarchean continental crust was dominated by SOUTH AFRICAN JOURNAL OF GEOLOGY, 2004, VOLUME 107, PAGE |  | Gijbels, R.h, Millard, H.T, Desborough, G.A, Bartel, A.J (1974) Osmium, ruthenium, iridium and uranium in silicates and chromite from the eastern Bushveld Complex, South Africa. Geochimica et Cosmochimica Acta, 38 (2) 319-337 doi:10.1016/0016-7037(74)90113-6 | Journal (article/letter/editorial) | | chromite from the eastern Bushveld Complex,South Africa* R. H. GLY~ELS,~H. T. MILLARD, JR., G. A. DESBOROU~Hand...1973;accqti in revisedform 16 Aqwt 1973) &&ra&-Osmium, ruthenium, iridium and uranium contents were determined...(mineral/liquid) for osmium are 4.6, 66 and 2700; for ruthenium, they are 6, 66 and 2700; and for iridium, they...features of the Bushveld Complex in the Republic of South Africa, oompared these to similar features in the Great...Accurate data for the concentrations of osmium, ruthenium and iridium have become available only within |
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