 | | 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) | | Abstract The Merensky Reef at the Western Platinmn mine differs in many respectsfrom the reef at its type...pegmatiticmelanoriteenclosingtwo thin chromitite bands. Platinum-groupmineralization occursmainly in the vicinity...between the two localities. The proportionsof the platinum-groupminerals are different from those at all...mineral, constituting more than 50 percentof the platinum-groupminerals. Braggite and cooperire,together...assemblageconstitutingabout 20 percentof the platinum-groupminerals.Minor amounts of platinum-iron alloy, gold, stibiopalladinite |  | Scoates, James S, Wall, Corey J, Friedman, Richard M, Weis, Dominique, Mathez, Edmond A, VanTongeren, Jill A (2021) Dating the Bushveld Complex: Timing of Crystallization, Duration of Magmatism, and Cooling of the World’s Largest Layered Intrusion and Related Rocks. Journal of Petrology, 62 (2) doi:10.1093/petrology/egaa107 | Journal (article/letter/editorial) | | intrusion and host to world-class stratiform chromium, platinum group element, and vanadium deposits, is a remarkable...Paleoproterozoic Bushveld Complex in the Kaapvaal craton of South Africa includes an immense layered intrusion characterized...magmatism. GEOLOGICAL SETTING OF THE BUSHVELD COMPLEX South Africa’s Bushveld Complex intruded into the Kaapvaal...baddeleyite (ID-TIMS) U–Pb baddeleyite (ID-TIMS) PtOs platinum minerals Lu–Hf garnet upper intercept upper intercept...that hosts world- class deposits of chromium, platinum group elements (PGE) and vanadium (Eales & Cawthorn |  | | Journal (article/letter/editorial) | | ISTRA, ANDI•LVIRAGAS?Ai•RINI Abstract The Atok Platinum Mine is situated in the northeastern portion of...chromitite seams,pegmatoid,and bandedfootwall norite. Platinum m]neralizationis usuallyconfinedto the porphyriticpyroxenitein...porphyriticpyroxenitein and betweenthe chromitite seams. Platinum valuescorrelate closelywith the nickel, copper..., and compoundsof Pd with Sn, Sb, and As. The platinum group minerals are preferentially associatedwith...associatedwith the sulfideminerals. It is thoughtthat platinum mineralizationis connectedwith the pegmatoid,•vhich |  | | Journal (article/letter/editorial) | | EconomicGeology Vol. 85, 1990, pp. 537-555 Platinum-GroupMinerals in VariousRock Types of the Merensky...dunite-affected. Utilizingourcurrentdataonthe platinum-group minerals,certainsuitespeculiarto normal...Potholes arecharacterized by a zonaldistribution of platinum-group minerals, withPt-Fe at their centersand...beingPt-Fe (andolivine)bearing,with largeamountsof platinum-group elementsin thebasemetalsulfides. Multip...thin chromitite layers. It is currently mined for platinum-groupelementsand base metals.The reef thicknessis |  | | Journal (article/letter/editorial) | | the Bushveld occurs in close proximity to the Limpopo Belt, an ancient suture zone between the Kaapvaal...stratigraphically above the Merensky Reef in the Atok section, northeast Bushveld (Mathez et al. 1997)...Complex B90-07 MR Pyroxenite, Merensky Reef, Atok Mine (Mathez 1995) B4 Upper critical zone S 24°...Shaft of the Rustenburg section of the Rustenburg Platinum Mines, western Bushveld the zircon grain or into...eventually acquire the isotopic identity of the local assemblage during infiltration. Second, the fact |  | | Journal (article/letter/editorial) | | Petrologic evolution of partially molten cumulate: the Atok section of the Bushveld Complex Received: 10 July...crystal pile. A model for the development of the Atok section is developed. The Merensky anorthosite is...interest, such as 21 redistribution of the platinum group elements (PGE), have yet to be established...assemblage have been hypothesized to have occurred in the Atok section of the Bushveld Complex (Mathez 1995). The... Naldrett et al. 1986). A detailed study of the Atok section by Lee and Butcher (1990) revealed a complex |  | | Journal (article/letter/editorial) | | reef and stratigraphically adjacent rocks of the Atok section, Bushveld Complex, have been determined...pile. The fact that the rocks enriched in the platinum group elements are also those that show evidence...intrusions, such as the Bushveld Complex of South Africa and the Stillwater Complex of Montana (USA)...origin of stratiform horizons enriched in the platinum group elements (PGE), the economically most important...concerns the Merensky reef as it is exposed in the Atok section (Schwellnus et al. 1976; Mossom 1986; Lee |  | | Journal (article/letter/editorial) | | STRATIGRAPHY THROUGH THE MERENSKY BASTARD REEF UNITS, ATOK SECTION, EASTERN BUSHVELD AND COMPLEX C. A. LEE...significance alized, feldspathicpyroxenite.In the Atok sectionof of theseisotopicvariationshasbeen discussed...sulfide eral recent contributionson the origin of platinum- mineralizationoccursperchedabovethe pegmatoid...86Sr) at thislevelin themagma at the baseof the Atok pegmatoidandthe pegmatoid chamber,which subsequentlymixed...resident is not mineralized. Another feature of the Atok section magmas (relativelylow87Sr/8•Sr). However |  | | Report (issue) | | 991 Z=4 X-ray Powder Pattern: Merensky Reef, South Africa. 2.295 (100), 1.202 (100), 1.408 (90), 0.9153...43.74 38.35 18.65 100.74 (1) Merensky Reef, South Africa; by electron microprobe, corresponding to (Pd1...Reef, South Africa). Association: Unspecified platinum tellurides (Merensky Reef, South Africa); keithconnite...From the Atok [TL] and Rustenburg mines, on the Merensky Reef, Bushveld complex, Transvaal, South Africa...Africa. From the Oktyabr mine, Talnakh area, Noril’sk region, western Siberia, Russia. In Montana, in the |  | | Journal (article/letter/editorial) | | Author(s) 2018 Abstract The Flatreef is a world-class platinum-group element (PGE) deposit recently discovered...MaierW@cardiff.ac.uk 1 Ivanhoe Mines Ltd, Mokopane, South Africa 2 School of Earth and Ocean Sciences, Cardiff...Cardiff, UK Introduction The Bushveld Complex of South Africa is the world’s largest layered intrusion and...Northam platinum mines; 2, Union platinum mine; 3, Impala platinum mines; 4, Rustenburg platinum mine; 5,...Western platinum and Karee mines; 6, Crocodile River mine; 7, Limpopo platinum mine; 8, Atok platinum mine; |  | | Journal (article/letter/editorial) | | Muskoxintrusion and other layered intrusions,in Harthe platinum-groupelementlevelsin both the reef graves,R. B...Petrology,v. 21, p. 685-719. onlyhavearisenif the platinum-groupmetalsstored --1986, Conventionin aid of... 1183-1225. pile below. Naldrett,A. J., 1981, Platinum-group elementdeposits:Canadian Inst. Mining Metall...Ballhaus,C. G., and Stumpfi,E.G., 1986, Sulfideand platinum ECON. GEOL., v. 81, p. 1105-1117. mineralizationin...BushveldComplexes: Evidencefor transportof the platinum-groupelementsby C1- Vermaak,C. F., 1976, The |  | | Journal (article/letter/editorial) | | andsperrylitewith platinum-iron alloyand minorPt-Pd bismuthotellurides and pipesby platinum-iron alloy,sperrylite...sulfidesin the earlier stagesand to form independent platinum-group mineralsin the later stagesof the magmaticcycle...silicatenickelinto sulfidenickel,but alsoin theextraction of platinum-group elements from•silicates, oxides, andsulfides...andeconomically significant platinum-group minerals. Hydrothermal copper-platinum oresnotspatially related...Uralsplacers area casein point;and(3) alteration of platinum-group element alloys in placersis a widespread |  | | Journal (article/letter/editorial) | | O. Box 2461, Rivonia 2128, South Africa Abstract Exploration for platinum-group elements has resulted...in the eastern limb of the Bushveld Complex, South Africa. The new discovery was made on the Dwarsrand...domal structures. Introduction EXPLORATION for platinum-group elements (PGE) has resulted in discovery...Bushveld Complex, South Africa. The exploration programs were carried out by two South African companies...property in the boundary area between the Atok and Messina platinum mines (Fig. 1). Whereas the three main |  | | Journal (article/letter/editorial) | | Geology, University of Pretoria, Pretoria 0002, South Africa. e-mail: mierkle@postino.up.ac.za; wiebke.grote@up...ac, za © 2008 September Geological Society of South Africa ABSTRACT Gold-rich alloys with variable ¡imounrs...Bushveld Complex is not only a major source of platinum-group elements (PGE), it also contains gold which...investigation of such grains from Rustenbutg Platinum Mine (Kingston and El-Dosuky, 1982) revealed that...inclusions are not restricted to Rustenburg Platinum Mine and can be observed in coarse metallic gold |  | | Journal (article/letter/editorial) | | HydrogenIsotopeCompositionof the MerenskyReef andRelatedRocks, Atok Section,BushveldComplex E.A. MATHEZ, Departmentof...geochemicalfeaturesof the Merenskyreef and adjacentrocksat Atok were establishedduringlate-stage solidification...magmaticprocesses. For example, the detailed characterof platinum-groupelement (PGE)mineralassemblages in the Merenskyreef...KinlochandPeyerl, 1990); the concentration of PGE Atok sectionof the BushveldComplexare reported. in the...Understandingpostcumulus magmaticprocesses is The Atok sectionof the Lebowaplatinumminesis burdenedby severaldifficulties |  | Schoenberg, Ronny, Kruger, F. Johan, Nägler, Thomas F., Meisel, Thomas, Kramers, Jan D. (1999) PGE enrichment in chromitite layers and the Merensky Reef of the western Bushveld Complex; a Re–Os and Rb–Sr isotope study. Earth and Planetary Science Letters, 172 (1) 49-64 doi:10.1016/s0012-821x(99)00198-3 | Journal (article/letter/editorial) | | Witwatersrand, Wits 2050, Johannesburg, Republic of South Africa c Institut für Allgemeine und Analytische Chemie...isotope system. Initial 187 Os=188 Os ratios of platinum-group element (PGE) enriched sulfides and whole...mixing; mineral deposits, genesis; chromitite; platinum group; Re=Os 1. Introduction The Critical Zone...compared to their surrounding rocks, are enriched in platinum-group 0012-821X/99/$ – see front matter © 1999...western limb of the Bushveld Complex. Note the platinum mine sections along the Merensky Reef and UG2 chromitite |  | | Journal (article/letter/editorial) | | 4000, South Africa AND ROGER N. SCOON Postnet Suite 291, Private Bag X31, Knysna 6570, South Africa...may be described as a wide-reef facies, in which platinum group element (PGE) mineralization is largely...chromite crystallization and consequent sulfide and platinum group mineral (PGM) precipitation resulting from...of the eastern limb of the Bushveld Complex, South Africa (Fig. 1). The original discovery of the Merensky...eastern limb is due to the fact that concentrated platinum exploration and mining only commenced here in |  | | Journal (article/letter/editorial) | | pp 1385-1394 The Platinum-GroupMineralogyof the MerenskyReef at the Impala Platinum Mines, Bophuthatswana...Abstract The platinum-group mineralogyof the MerenskyReefat the Impalaplatinummines,South Africa, hasbeen...followedup by the identificationand analysisof platinum-groupmineralsby electronmicroprobe. The mostabundantbasemetal...chalcopyrite. The relativevolumetricabundances of the platinum-groupmineralswere determinedto be asfollows:coopetite(44%)...MerenskyReef. Observedtexturesincludethe markedtendencyof platinum-groupmineralsto occurwith chalcopyrite, the exsolution |  | | Journal (article/letter/editorial) | | eastern Bushveld 12 Complex at the Smokey Hills platinum mine. Layers show very strong medium to large scale...Anorthosite, Layered intrusion, Bushveld Complex, South Africa, Chromitite 24 1. Introduction 25 The petrogenesis...adjacent intrusive anorthosite at Smokey Hills platinum mine 50 on the farm Maandagshoek in the eastern...discovery site of platinum in the Bushveld Complex 56 (Merensky, 1926). Platinum nuggets were found...the multi-billion dollar South African 61 platinum industry. Smokey Hills mine was initially opened in |  | | Report (issue) | | DEPARTMENT OF THE INTERIOR GEOLOGICAL SURVEY REVIEW OF PLATINUM-GROUP METAL GEOCHEMISTRY AND THE MAJOR OCCURRENCES................ 1 Geologic occurrences of the platinum-group metals ....... 2 ................ 2............... 3 Platinum deposits in South Africa ............. 3 Major platinum deposits in Russia...Russia ............. 5 Platinum deposits in Canada ................ 6 Platinum deposits in Columbia .................. 6 Platinum occurrences in other parts of the world ..... 7 .................... |  | 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 |  | | Journal (article/letter/editorial) | | hanging wall norites at an area of Rustenburg Platinum Mines in a demonstrably normal (undisturbed) environment...University of Natal, Durban, 4041 South Africa C.A. Lee Anglo American Platinum Corporation, PO. Box 62179,... Marshalltown, 2107, South Africa Present address: 1Hartley Platinum Mine, PO. Box CY 2288, Harare, Zimbabwe...Merensky reef is the world's major source of the platinum-group elements (PGE) as well as being a major... 658 Fig. 1 Geographic location of Rustenburg Platinum Mine (Rustenburg Section) in the Bushveld Complex |  | | Journal (article/letter/editorial) | | 77, 1982, pp• 1867-1884 A Contributionon the Platinum-GroupMineralogy of the MerenskyReef at the Ru...variations,and possible parageneticposi- tionsof the platinum-group minerals(PGM)in samples of MerenskyReefpyroxenite...normalreef faciesin the centralsectionof the Rustenburg mine are described and discussed. The studyindicatesthat...reflectanceand hardnessdata are presented.The platinum-groupmineralsare an intimate part of the crystallization...conformsto the known geochemicalcharacter of the platinum-groupelements,especiallywith regardto the fractionationof |  | | Report (issue) | | 991 Z=4 X-ray Powder Pattern: Merensky Reef, South Africa. 2.295 (100), 1.202 (100), 1.408 (90), 0.9153...28.28 17.70 Total 99.42 (1) Merensky Reef, South Africa; by electron microprobe, corresponding to (Pt1...Reef, South Africa). Association: Atokite, unspecified platinum tellurides (Merensky Reef, South Africa);...[TL], Atok, and Onverwacht mines, on the Merensky Reef, Bushveld complex, Transvaal, South Africa. From...Baikal district, eastern Siberia. Name: For its occurrence in the Rustenburg mine, South Africa. Type |
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