 | | Journal (article/letter/editorial) | | bodies Roger N. Scoon PO Box 2461, Rivonia 2128, South Africa e-mail: rnscoon@iafrica.com Andrew A. Mitchell...4000, South Africa e-mail: mitchell@pixie.udw.ac.za Ā© 2004 Geological Society of South Africa ABSTRACT...are emplaced in the Upper Critical zone, the Onverwacht and Twyfelaar pipes occur in the Lower Critical...Lydenburg Platinum Syndicate on 15th August 1924, the first occurrence of economic platinum mineralization...the Driekop, Mooihoek and Onverwacht pipes, which are among the oldest platinum mines in the World, and |  | | Journal (article/letter/editorial) | | 481-497 (2002) PLATINUM-GROUP MINERALS IN CHROMITITE XENOLITHS FROM THE ONVERWACHT AND TWEEFONTEIN ULTRAMAFIC...ULTRAMAFIC PIPES, EASTERN BUSHVELD COMPLEX, SOUTH AFRICA FEDERICA ZACCARINIĀ§ Via B. Ramazzini 15, I-41100...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...intersected during the emplacement of the pipes. Platinum-group minerals in the chromitite xenoliths consist |  | | 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 ........................... |  | 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 OBERTHĆRĀ§...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) | | EUGENE N. CAMERON OF SOUTH AND No. 2 PEGMATITES THE BUSHVELD AFRICA GEORGE A. DESBOROUGH ABSTRACT...origin. The outer forsteritic dunite of the Onverwacht platinum pipe has formed by replacementof bronzititesof...consistentwith structural relations of the core to the Steelpoort Main chromitite seam, as reportedby Wagner and...pegrnatitesin the easternpart of the BushveldComplexof South Africa have been known for many years. The pegmatitesare...best-knownbodiesof pegmatiteare in the platinum-bearing pipes of Onverwacht,Mooihoek,and Driekop,minedchieflyin |  | | Journal (article/letter/editorial) | | ALLUVIAL AND ELUVIAL PLATINUM-GROUP MINERALS FROM THE BUSHVELD COMPLEX, SOUTH AFRICA T. OBERTHĆR Bundesanstalt...Society of South Africa ABSTRACT The present work provides an initial description of detrital platinum-group...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 |  | | Journal (article/letter/editorial) | | University of the Witwatersrand, PO Wits, 2050, South Africa e-mail: 065rgc@cosmos.wits.ac.za C. Harris Department... University of Cape Town, Rondebosch, 7700, South Africa F. J. Kruger Hugh Allsopp Laboratory of the...University of the Witwatersrand, PO Wits, 2050, South Africa Editorial responsibility: A. Hofmann pared...considered to have formed by replacement as a result of local migration of residual magma from the underlying...source of platinum mined from the Bushveld Complex (Viljoen and Scoon 1985). Where mining for platinum or vanadiferous |  | | Journal (article/letter/editorial) | | of the discorthe famous Driekop, Mooihoek, and Onverwacht dant bodies of ultramarie rock have a detrimental...tentativelysuggestthat they are intruin someof the platinum minesof the westernBush- sive not metasomaticfeatures...DISCORDANT BODIES 1113 To the north of the Steelpoort valley in the The platiniferouscore zone in the...iron-richultramaficpegmatiteare abun- Mooihoek, and Onverwacht, aswell as a subeconomic dant in the upper critical...clinopyroxenite may occur (see fig. 5 in Wagner, 1929). Platinum-groupelementsandbasemetal sulfidesare essentiallyrestrictedto |  | | Journal (article/letter/editorial) | | REPLACED MERENSKY REEF AT THE AMANDELBULT MINE, SOUTH AFRICA R.N. SCOON Department of Geology, Rhodes...Rhodes University, Grahamstown 6140, South Africa e-mail: rnscoon@iafrica.com A.A. MITCHELL School of Geological...4000, South Africa e-mail: mitchaa@mweb.co.za Ā© 2011 March Geological Society of South Africa ABSTRACT...in the eastern limb of the Bushveld Complex, South Africa, differ sufficiently from one another to warrant...In our previous contributions on the Driekop, Onverwacht, and Twyfelaar localities we noted that despite |  | | Journal (article/letter/editorial) | | GEOLOGICAL EXCURSION TO THE MINING AREAS OF SOUTH AFRICA by Aberra Mogessie, Christoph Hauzenberger...Department of Geology, University of the Free State, South Africa 1. Preface Almost a year ago Aberra Mogessie...(where we had organized past excursions) and South Africa. Having discussed the matter with Christoph...areas of South Africa. We contacted Christoph Gauert from the University of Free State, South Africa to help...help us with the local organization especially to get permission from the different mining companies to |  | | Journal (article/letter/editorial) | | Toronto,Ontario M5S 1A1, Canada Abstract The platinum-groupmineralogyof the platinumpipeshasbeenwell...hortonolitedunites, and dunite-bronzitites from the Onverwacht,Mooihoek,and Driekoppipesrevealedthe presenceof...fracturesin Cr-Ti spinel.Smallamountsof sulfidesand platinum-groupmineralsare also found in these locations...silicatesis low, with the platinum-groupelementscontainedin sulfidesor platinum-group minerals. Microprobedata...late and postmagmaticsolutions,with someof the platinum-groupelementspossiblytransportedas organometalliccompounds |  | | Journal (article/letter/editorial) | | Witwatersrand, PO Wits, 2050, South Africa CHRISTOPHER A. LEEĀ¶ Anglo Platinum Geology Department, PO Box...62179, Marshalltown, 2107, South Africa ROBERT P. SCHOUWSTRA Anglo Platinum Research Centre, PO Box 6540...1412, South Africa PETER MELLOWSHIP Impala Platinum Mines, PO Box 5683, Rustenburg, 0300, South Africa...Africa ABSTRACT The abundances of the platinum-group elements (PGE), and their relative proportions, are...and eastern limbs of the Bushveld Complex, in South Africa. Grades for the mined reef interval are uniform |  | | Journal (article/letter/editorial) | | Metallurgy (NIM) Bon Accord Mpumalanga Province South Africa BRUCE CAIRNCROSS N Department of Geology University...PO Box 524, Auckland Park 2006 Johannesburg South Africa brucec@uj.ac.za IMITE, (Ni,Mg,Al)6(Si,Al)4O10(OH)8...Barberton greenstone belt, Mpumalanga Province, South Africa. Figure 1. Entrance to the Council for Mineral...of Johannesburg city center, in the Randburg municipality. Bruce Cairncross photo (February 2017). Volume...for Metallurgy (NIM) based in Johannesburg, South Africa, subsequently renamed in 1981 as MINTEK, the |  | | Journal (article/letter/editorial) | | ROGER N. SCOONā P.O. Box 2461, Rivonia 2128, South Africa AND ANDREW A. MITCHELL School of Geology,...KwaZulu-Natal, Private Bag 54001, Durban 4000, South Africa Abstract Discordant ultramafic bodies are a...significant feature of the Bushveld Complex, South Africa. Many of these bodies form subvertical, cylindrical...determining the possibility of locating pipe-type platinum ores in other layered intrusions, the spatial...probably more abundant in the Bushveld Complex, South Africa (Fig. 1) than is generally realized. The original |  | | Journal (article/letter/editorial) | | University of Natal , Pietermaritzburg, 3200, South Africa d U.S. Geological Survey , Box 25046, Mail...University of Natal, Pietermaritzburg 3200, South Africa AND ROY KNIGHT Downloaded by [ECU Libraries]...LGS (Dennilton, Verena-Balmoral, Enkeldoorn, Sekhukhune Plateau, Zaaiplaats-Potgeitersrus, and Western...50978 Ā± 8 and ĪµCHUR = -5.12. Samples from the Sekhukhune Plateau have higher l 4 3 Nd/ l 4 4 Nd ratios...Bushveld Complex (BC) of the central Transvaal, South Africa (Figs. 1 and 2), consists of three major rock |  | | Journal (article/letter/editorial) | | 330 ReviewsāPlatinum in the Lydenburg District. are to be found on the summit of the mountain itself...THE LYDENBURG DISTRICT. By P. A. WAGNER and E. T. MELLOR. Trans. Geol. Soc. S. Africa, vol. xxviii,...of important quantities of platinum in quartz veins in the Waterberg district. The present publication...nearly 60 miles in length, on either side of the Steelpoort River in the Sekukuniland and Dwars River areas...chromite-rock which is of great commercial value. Platinum-bearing rocks have been found at two horizons |  | | Journal (article/letter/editorial) | | illustrating the nature of Archean volcanismin southern Africa and elsewhereare made available for purposesof...mineralization. The Archean mineralization of southern Africa is briefly compared and contrasted with that of...the easternpart southern Africa. of Botswana, the northeasternsegment of South The purposes of this paperare...paperare, briefly,to consider Africa, and Rhodesia,the shield consistsof two crathe nature and distribution...GREENSTONE BELT LITHOLOGICAL UNITS RHODESIA/BOTSWANA SOUTH AFRICA/SWAZILAND Sedimentary unit ShamraJah Mafic-to-l'el$ic |  | | Journal (article/letter/editorial) | | KRIGE, and A. V. KEIGE. Trans. Geol. Soc. S. Africa, vol. xxviii, 1925, pp. 19-25, with 3 plates. FPHE...glaciated boulders; such 330 ReviewsāPlatinum in the Lydenburg District. are to be found on the summit of...THE LYDENBURG DISTRICT. By P. A. WAGNER and E. T. MELLOR. Trans. Geol. Soc. S. Africa, vol. xxviii,...of important quantities of platinum in quartz veins in the Waterberg district. The present publication...nearly 60 miles in length, on either side of the Steelpoort River in the Sekukuniland and Dwars River areas |  | Coggon, J.A., Nowell, G.M., Pearson, D.G., OberthĆ¼r, T., Lorand, J.-P., Melcher, F., Parman, S.W. (2012) The 190Ptā186Os 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 maļ¬c/ultra-maļ¬c...geochronologically well constrained Bushveld Complex, S. Africa. Mixed PGM (laurite, cooperite, lauriteāplatarsite...a Merensky cooperite; a PtāFe alloy from the Onverwacht pipe and a Tweefontein Hill sperrylite give PtāOs |  | | Journal (article/letter/editorial) | | importantrole in the transport and precipitationof the platinum-groupelements,the basemetals,and other cations...ga chloridesolution,olivine,magnetite,and the platinum-groupelementscan accountfor the preferentialassociation...the geologicalliteraturefor the extremelyhigh platinum contentof their centralcores.Althoughall three...contactis not exposed,on pipes were once mined for platinum, the Driekop the basisof informationfrom otherpipes...the eastof the pipe.Dunitc to the west of the Onverwacht hortonolite core has a layeredstructurewith |  | | Journal (article/letter/editorial) | | PIPE, EASTERN LIMB OF THE BUSHVELD COMPLEX, SOUTH AFRICA R.N. SCOON Postnet Suite 291, Private Bag X31...Durban 4000, South Africa e-mail: mitchaa@mweb.co.za Ā© 2009 June Geological Society of South Africa ABSTRACT...on the basis of detailed mapping and sampling of mine workings that are not generally accessible. The...Bushveld Complex, South Africa and are situated to the north of the small town of Steelpoort (Figure 1a)....Mooihoek, and Onverwacht, are internationally famous as they are among the oldest hard-rock platinum mines in |  | | Journal (article/letter/editorial) | | 155 THE PRINCIPAL GEOLOGICAL FEATURES OF THE ONVERWACHT PLATINIFEROUS DUNITE PIPE, EASTERN LIMB OF THE...Geology, Rhodes University, Grahamstown 6140, South Africa e-mail: rnscoon@iafrica.com A.A. MITCHELL Department...Durban 4000, South Africa e-mail: mitchaa@mweb.co.za Ā© 2010 June Geological Society of South Africa ABSTRACT...ABSTRACT The Onverwacht pipe, situated on the leasehold of Eastern Chrome mines in the eastern limb of the...monument, as it is the site of the oldest platinum mine in South Africa. The central part of the pipe consists |  | | Journal (article/letter/editorial) | | iron-rich ultramafic pegmatite at the Amandelbult Platinum mine, northwestern Bushveld Complex R. N. SCOON1...2128, South Africa Department of Geology, Rhodes University, PO Box 94, Grahamstown 6140, South Africa...pegmatite are described from the Amandelbult Platinum mine in the northwestern part of the Bushveld Complex...ultramaļ¬c pegmatite, Amandelbult Platinum mine, Bushveld Complex, South Africa. Introduction D ISCORDANT iron-rich...minerals associated with IRUPs at the Amandelbult Platinum mine, in the northwestern part of the Bushveld Complex |  | | Report (issue) | | Driekop mine, South Africa; by electron microprobe, corresponds to Pt1.00 Sb1.84 . (2) Onverwacht mine, South...South Africa; by electron microprobe, corresponds to Pt1.00 (Sb1.66 Bi0.29 As0.04 )Ī£=1.99 (3) PtSb2 ....concentrates of platinum minerals derived from PtāFeāNiāCu deposits in ultramafic rocks (Driekop mine, South Africa)...Africa). Association: Platinum, gold, hollingworthite, sperrylite, stibiopalladinite, chalcopyrite, pyrrhotite...pyrrhotite (Driekop mine, South Africa); vozhminite, heazlewoodite, tucĢekite, magnetite, copper (Vozhmin |  | | Journal (article/letter/editorial) | | Complex, South Africa R.N. Scoon Department of Geology, Rhodes University, Grahamstown 6140, South Africa...Geology, Rhodes University, Grahamstown 6140, South Africa Department of Earth, Environmental and Planetary...Operations South Africa, Rustenburg, South Africa Ā© 2017 June Geological Society of South Africa Abstract...Abstract The 2055 Ma Bushveld Complex, South Africa, is well known for the occurrence of discordant bodies...Kennedy's Vale discordant body, situated in the Steelpoort Valley section of the Eastern Limb, has been |
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Onverwacht Mine, Steelpoort, Fetakgomo Tubatse Local Municipality, Sekhukhune District Municipality, Limpopo, South Africa