 | | 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) | | 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 |  | 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...most common, followed by sperrylite, cooperite, braggite, isomertieite or mertieite I, stibiopalladinite...to 1.6 mm) compared to those of PGM in the Merensky Reef and the UG–2 (generally <50 m) indicate pronounced...processes. The detrital PGM may originate from the Merensky Reef, the UG–2, platiniferous pipes, or still concealed |  | Barkov, A. Y., Martin, R. F., Kaukonen, R. J., Alapieti, T. T. (2001) THE OCCURRENCE OF Pb Cl (OH) AND Pt Sn S COMPOUNDS IN THE MERENSKY REEF, BUSHVELD LAYERED COMPLEX, SOUTH AFRICA. The Canadian Mineralogist, 39 (5) 1397-1403 doi:10.2113/gscanmin.39.5.1397 | Journal (article/letter/editorial) | | Pt–Sn–S COMPOUNDS IN THE MERENSKY REEF, BUSHVELD LAYERED COMPLEX, SOUTH AFRICA ANDREI Y. BARKOV§ AND ROBERT...in chalcopyrite, in a spatial association with platinum-group minerals, in a sulfide-poor (≤5 vol.% of...enstatite orthocumulate of the Merensky Reef, Bushveld layered complex, South Africa. This seems to be the first...mafic-ultramafic rocks. The associated platinum-group minerals are members of the braggite series, cooperite (which...(which forms large intergrowths with braggite: up to 0.5 mm in the longest dimension), members of the rustenburgite–atokite |  | | Journal (article/letter/editorial) | | W. Merkle Æ Sabine M.C. Verryn Cooperite and braggite from the Bushveld Complex: implications for the...Analyses of the Pt-Pd±Ni sulphides cooperite, braggite, and vysotskite reported from worldwide occurrences...cooperite and braggite, and the established compositional gap between co-existing cooperite and braggite from...from the Merensky Reef. Although the only unambiguous way of distinguishing between cooperite and braggite...techniques due to the small grain size of most platinum-group minerals. Ni contents also have to be considered |  | | Journal (article/letter/editorial) | | Abstract The Merensky Reef at the Western Platinmn mine differs in many respectsfrom the reef at its type...type locality at Rustenburg,30 km to the west. The reef averages 4 m thick and consistsof major porphyritic...pegmatiticmelanoriteenclosingtwo thin chromitite bands. Platinum-groupmineralization occursmainly in the vicinity...chromitite seam, whereas at Rustenburg, where the reef is very thin and consistsof pegmatitic pyroxenite...changeoccursin the reef between the two localities. The proportionsof the platinum-groupminerals are |  | | Journal (article/letter/editorial) | | Compositional variation of cooperite, braggite, and vysotskite from the Bushveld Complex SABINE M. C...Geology, University of Pretoria, Pretoria, 0002 South Africa Abstract The compositions of coexisting and...cooperite (ideally PtS) and braggite (ideally (Pt,Pd)S) grains from the Merensky Reef of the Bushveld Complex...Complex, as well as cooperite, braggite and vysotskite (ideally PdS) grains from the UG-2 of the Bushveld...miscibility gap between cooperite and braggite, but no evident gap between braggite and vysotskite. Partition coefficients |  | | 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...copper, and chromium contents of the ore. Braggite and cooperiteare the most abundantplatinumgroup minerals..., and compoundsof Pd with Sn, Sb, and As. The platinum group minerals are preferentially associatedwith |  | | Journal (article/letter/editorial) | | peculiarities of gold-rich alloys from the Merensky Reef Roland Merkle, Wiebke Grote and Peter Gräser...Geology, University of Pretoria, Pretoria 0002, South Africa. e-mail: mierkle@postino.up.ac.za; wiebke.grote@up...Society of South Africa ABSTRACT Gold-rich alloys with variable ¡imounrs of Pd from the Merensky Reef, Bushveld...The ,Mt.Ten,sky Reef of the Bushveld Complex is not only a major source of platinum-group elements (PGE)...concentrations and distribution of gold in the Merensky Reef is available, but the recommended value for |  | | Journal (article/letter/editorial) | | 1244 1269 A ReviewoftheMineralogy oftheMerensky Reef,with SpecificReferenceto New Data on the Precious...associated with the base metal sulfides. Idiomorphic braggite, cooperite, andlaurite,withnilnorsperrylite, are...(1960), and Liebenberg themineralogy of theMerensky Reef,withquantita- (1970) haveprovidedthe detailsof morethorough...theMererisky Reefin 1924,surprisingly of Rustenburg Platinum Mines, are listed in the little work hasbeenpublished...reœerences. 1244 REVIEIF OF M'INER,,ILOGY OF M'ERENSKY REEF 1245 1246 C. F. VERMAAK TABLE2. AND L. P. HENDRIKS |  | | Journal (article/letter/editorial) | | ASSESSMENT OF PLATINUM-GROUP MINERALS ASSOCIATED WITH CHROMITITE STRINGERS IN THE MERENSKY REEF OF THE EASTERN...EASTERN BUSHVELD COMPLEX, SOUTH AFRICA Derek ROSE, Fanus VILJOEN§, Mike KNOPER and Hariharan RAJESH Department...524, Auckland Park, 2006, South Africa Abstract The minerals of the platinum-group elements (PGM) and...host minerals from the Merensky Reef at the Two Rivers platinum mine, South Africa, were investigated using...from 12 boreholes drilled into a variety of Merensky Reef facies types. Primary minerals associated with |  | Osbahr, Inga, Klemd, Reiner, Oberthür, Thomas, Brätz, Helene, Schouwstra, Robert (2013) Platinum-group element distribution in base-metal sulfides of the Merensky Reef from the eastern and western Bushveld Complex, South Africa. Mineralium Deposita, 48 (2) 211-232 doi:10.1007/s00126-012-0413-8 | Journal (article/letter/editorial) | | ARTICLE Platinum-group element distribution in base-metal sulfides of the Merensky Reef from the eastern...eastern and western Bushveld Complex, South Africa Inga Osbahr & Reiner Klemd & Thomas Oberthür & Helene...magmatic Ni-Cu-PGE deposits are important carriers of platinum-group elements (PGE). The distribution and concentrations...samples from the mineralized portion of four Merensky Reef intersections from the eastern and western Bushveld...samples to obtain mineralogical balances. In Merensky Reef samples from the western Editorial handling: |  | McCreesh, Matthew J. G., Yudovskaya, Marina A., Kinnaird, Judith A., Reinke, Christian (2018) Platinum-group minerals of the F and T zones, Waterberg Project, far northern Bushveld Complex: implication for the formation of the PGE mineralization. Mineralogical Magazine, 82 (3) 539-575 doi:10.1180/mgm.2018.83 | Journal (article/letter/editorial) | | Platinum-group minerals of the F and T zones, Waterberg Project, Far Northern Bushveld Complex: implication...University of the Witwatersrand, 2050 Wits, South Africa 2. CIMERA the NRF/DST Centre of Excellence...Johannesburg, PO Box 524, Auckland Park 2006, South Africa * E-mail: marina.yudovskaya@wits.ac.za ABSTRACT...alloy with rare sperrylite, braggite, Pd stannides and antimonides. The platinum-group minerals (PGM) of...stage. Keywords: Bushveld, Waterberg project, platinum-group minerals, sperrylite, Pt-Pd bismuthotellurides |  | | Journal (article/letter/editorial) | | ALLUVIAL AND ELUVIAL PLATINUM-GROUP MINERALS FROM THE BUSHVELD COMPLEX, SOUTH AFRICA T. OBERTHÜR Bundesanstalt...Society of South Africa ABSTRACT The present work provides an initial description of detrital platinum-group...alloys (together 54%), sperrylite (33%), cooperite/braggite (11%), and stibiopalladinite (2%). This PGM assemblage...pristine, sulfide-bearing mineralization in the Merensky, UG-2 and Platreef, the assumed sources of the...originate from platiniferous pipes and not from the Merensky or UG-2 reefs. Detrital PGM can be expected to |  | Osbahr, Inga, Oberthür, Thomas, Klemd, Reiner, Josties, Anja (2014) Platinum-group element distribution in base-metal sulfides of the UG2 chromitite, Bushveld Complex, South Africa—a reconnaissance study. Mineralium Deposita, 49 (6) 655-665 doi:10.1007/s00126-014-0538-z | Journal (article/letter/editorial) | | 49:655–665 DOI 10.1007/s00126-014-0538-z LETTER Platinum-group element distribution in base-metal sulfides...sulfides of the UG2 chromitite, Bushveld Complex, South Africa—a reconnaissance study Inga Osbahr & Thomas...reveal that pentlandite carries distinctly elevated platinum-group element (PGE) contents. In contrast, pyrrhotite...Germany 50 %), Ir (2 to 17 %), and Ru (1–39 %). Platinum-group mineral (PGM) investigations support these...results; most of the PGM are Pt-dominant such as braggite/ cooperite and Pt-Fe alloys or laurite (carrying |  | | 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...and tellurides occur almost invariably in the Merensky Reef and in Stillwater, whereas Ru sulfide is abundant |  | Li, C., Ripley, E. M., Merino, E., Maier, W. D. (2004) REPLACEMENT OF BASE METAL SULFIDES BY ACTINOLITE, EPIDOTE,CALCITE, AND MAGNETITE IN THE UG2 AND MERENSKY REEF OF THE BUSHVELDCOMPLEX, SOUTH AFRICA. Economic Geology, 99 (1) 173-184 doi:10.2113/gsecongeo.99.1.0173 | Journal (article/letter/editorial) | | MAGNETITE IN THE UG2 AND MERENSKY REEF OF THE BUSHVELD COMPLEX, SOUTH AFRICA CHUSI LI,†EDWARD M. RIPLEY...Sciences, University of Pretoria, Pretoria 0002, South Africa Abstract Interaction of base metal sulfides...fluids in the UG2 chromitite layer and the Merensky reef in the western Bushveld Complex has produced...serpentinization superimposed on the Union section. Platinum group minerals, including Ru, Pt, and Pd sulfides...as within the aggregates, suggesting that the platinum group minerals are more resistant to hydrothermal |  | Oberthür, Thomas, Junge, Malte, Rudashevsky, Nikolay, de Meyer, Eveline, Gutter, Paul (2016) Platinum-group minerals in the LG and MG chromitites of the eastern Bushveld Complex, South Africa. Mineralium Deposita, 51 (1) 71-87 doi:10.1007/s00126-015-0593-0 | Journal (article/letter/editorial) | | ARTICLE Platinum-group minerals in the LG and MG chromitites of the eastern Bushveld Complex, South Africa...of the Bushveld Complex in South Africa contain vast resources of platinum-group elements (PGE); however...mineralogical nature, assemblages, and proportions of platinum-group minerals (PGM) is essentially missing. In...dominant PGM are various Pt-Pd-Rh sulfides (cooperite/braggite [(Pt,Pd)S] and malanite/cuprorhodsite [CuPt2S4]/[CuRh2S4])...(compared to the LG-6) or regionally in the chromitites south of the Steelpoort lineament. Editorial handling: |  | | Journal (article/letter/editorial) | | Sciences, University of Pretoria, Pretoria 0002, South Africa ABSTRACT Results of experimental investigations...are synthetic cooperite [(Pt,Pd,Ni)S], synthetic braggite [(Pt,Pd,Ni)S], synthetic vysotskite [(Pd,Pt,Ni)S]...to temperatures above 1200°C, whereas synthetic braggite is stable at temperatures below 1100°C, and synthetic...PtS–PdS– NiS, Ni-saturated synthetic cooperite, braggite, and vysotskite coexist with Ni1–xS. At 900°C...cooperite coexists with Ni1–xS, and synthetic braggite and Pd-bearing synthetic cooperite coexist with |  | | Journal (article/letter/editorial) | | Petrology (2000) 68: 213±222 The recovery of platinum-group elements from the UG-2 chromitite, Bushveld...Mintek, Randburg, South Africa Department of Geology, University of Pretoria, South Africa With 6 Figures...accepted April 2, 1999 Summary The behaviour of platinum-group elements (PGE) during milling and ¯otation...the UG-2 chromitite occur primarily in discrete platinum-group mineral phases, varying from sulphide assemblages...assemblages (predominantly cooperite, braggite, malanite and laurite) to assemblages comprising a signi®cant |  | | Journal (article/letter/editorial) | | Petrology (2000) 68: 63±73 Synthetic ``Cooperite'', ``Braggite'', and ``Vysotskite'' in the system PtS-PdS-NiS...Sciences, University of Pretoria, Pretoria, South Africa With 6 Figures Received October 1, 1998; revised...C ``cooperite'', ``braggite'', and a melt and at 900 C ``cooperite'', ``braggite'', ``vysotskite'',...Ni-free ``cooperite'' is 13.7 atomic per cent. The ``braggite'' composition ranges from Pt0.56Pd0.38Ni0.06S...Ni-free ``cooperite'' is 12.5 atomic per cent. The ``braggite'' composition ranges from Pt0.59Pd0.29Ni0.12S |  | 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...Complex and a role of superimposed processes at the reef formation. We analyzed laurite (RuS2), hollingworthite |  | | 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%)...asfollows:coopetite(44%),laurite (21%),moncheite(17%),and braggite(12%).Thirteen additionalplatinum-group mineralscomprisedthe |  | | Journal (article/letter/editorial) | | desulfurization in the Merensky Reef at Rustenburg (western Bushveld Complex, South Africa) ALEXANDER KAWOHL1...Sciences, University of Cape Town, Rondebosch 7700, South Africa [Received 30 July 2015; Accepted 4 November...Normal (or undisturbed) Merensky Reef from Frank Shaft No.1 at Rustenburg Platinum Mine revealed the presence...bismuthotellurides (10 vol.%), electrum (9 vol.%) and platinum group element- (PGE-) sulfides and stannides (2...petrographic results indicate that the normal thin reef has also undergone hydrothermal alteration. For |  | | Journal (article/letter/editorial) | | Deposita DOI 10.1007/s00126-016-0676-6 LETTER Platinum-group elements and minerals in the lower and middle...chromitites of the western Bushveld Complex, South Africa Malte Junge 1 & Thomas Oberthür 1 & Inga Osbahr...of the Bushveld Complex in South Africa contain vast resources of platinum-group elements (PGE). However...dominant PGM are sulfides, namely laurite, cooperite-braggite, and malanitecuprorhodsite, followed by PGE-sulfarsenides...Germany 3 SYLVANIA Platinum Ltd., P.O. Box 976, Florida Hills 1716, South Africa Rare thiospinels of |
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