 | | 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 |  | | Journal (article/letter/editorial) | | ROGER N. SCOON† 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...probably more abundant in the Bushveld Complex, South Africa (Fig. 1) than is generally realized. The original...2). Our investigations into the platiniferous Driekop, Mooihoek, and Onverwacht pipes, which are also |  | 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) | | RIVERS DRAINING THE EASTERN BUSHVELD COMPLEX, SOUTH AFRICA THOMAS OBERTHÜR§, FRANK MELCHER, LOTHAR GAST...placer, Maandagshoek, eastern Bushveld Complex, South Africa. SOMMAIRE Lors de nos campagnes de terrain...Merensky Reef, on the farm Maandagshoek, close to Burgersfort in the Eastern Bushveld (Figs. 1, 2). Some of...between 2 and 3 km wide and runs approximately north–south, subparallel to the layering of the Mafic Phase...underlain by the Critical Zone. Between the Atok mine and Steelpoort (Fig. 2), the layered sequence dips |  | | 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 |  | Maier, W. D., Barnes, S.-J., Groves, D. I. (2013) The Bushveld Complex, South Africa: formation of platinum–palladium, chrome- and vanadium-rich layers via hydrodynamic sorting of a mobilized cumulate slurry in a large, relatively slowly cooling, subsiding magma chamber. Mineralium Deposita, 48 (1) 1-56 doi:10.1007/s00126-012-0436-1 | Journal (article/letter/editorial) | | 1007/s00126-012-0436-1 ARTICLE The Bushveld Complex, South Africa: formation of platinum– palladium, chrome- and...mines, 2 Union platinum mine, 3 Impala platinum mines, 4 Rustenburg platinum mine, 5 Western platinum and...mines, 6 Crocodile River mine, 7 Messina platinum mine, 8 Atok platinum mine, 9 Maandagshoek section with...with Modikwa platinum mine, 10 Mineral Range and Sheba’s Ridge deposit, 11 Rooipoort, Moorddrift, and...the complex and its economically important PGE, chromite and magnetite mineralization is presented. Finally |  | | Journal (article/letter/editorial) | | ULTRAMAFIC PIPES, EASTERN BUSHVELD COMPLEX, SOUTH AFRICA FEDERICA ZACCARINI§ Via B. Ramazzini 15, I-41100...University of the Witwatersrand, PO Wits 2050, South Africa ABSTRACT The ultramafic pipes of Onverwacht...the eastern part of the Bushveld Complex, in South Africa, contain small xenoliths of chromitite that...sulfides, occurring almost exclusively in fresh chromite (type-1 assemblage), b) abundant alloys (isoferroplatinum...(stibiopalladanite or sudburyite), included in both fresh chromite and interstitial olivine (type-2 assemblage), |  | | Journal (article/letter/editorial) | | 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 © 2010 June Geological Society of South Africa ABSTRACT...as it is the site of the oldest platinum mine in South Africa. The central part of the pipe consists of...mineralized pipes, we ascribed formation of the Driekop pipe to orthomagmatic and partial melting processes...Introduction The four platiniferous dunite pipes, Driekop, Mooihoek, Onverwacht, and Twyfelaar, are restricted |  | | 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 © 2004 Geological Society of South Africa ABSTRACT...angles. They are restricted to four localities. The Driekop and Mooihoek pipes are emplaced in the Upper Critical...the history of the evaluation and mining of the Driekop, Mooihoek and Onverwacht pipes, which are among...pyroxenitic wallrocks, but at the noritic-hosted Driekop and Mooihoek pipes the stocks are rimmed by envelopes |  | | Journal (article/letter/editorial) | | FOR THE DRIEKOP PLATINIFEROUS DUNITE PIPE, EASTERN LIMB OF THE BUSHVELD COMPLEX, SOUTH AFRICA R.N. SCOON...Durban 4000, South Africa e-mail: mitchaa@mweb.co.za © 2009 June Geological Society of South Africa ABSTRACT...such pipe, at Driekop, are revisited on the basis of detailed mapping and sampling of mine workings that...dunite (Fo83.4). Chromite is a prominent accessory phase of the magnesian dunite. The chromite is locally altered...core-zone. All of the iron-rich ultramafics at Driekop are distinguished by the absence of a spinel phase |  | | 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 © 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...hypothesis. In our previous contributions on the Driekop, Onverwacht, and Twyfelaar localities we noted |  | | 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...platiniferous olivine-rich pipes of Onverwacht, Driekop and Mooihoek (Fig. 1b) have been mined down to |  | | Journal (article/letter/editorial) | | and, paradoxically,many of the discorthe famous Driekop, Mooihoek, and Onverwacht dant bodies of ultramarie...nonplatiniferousmagne- Fe-Ti oxides and iron-rich sulfides. Chromite is not sian dunitc is selected,are poorly understoodand...understoodand normally observed although hybrid chromite-Ti magnetite spinel may occur. The nature of the...valley in the The platiniferouscore zone in the Driekop pipe eastern BushveldComplex on the farm Maandags-...and mica.This assemblage may be referred to as a Driekop platiniferouspipe (Gain, 1980). Thesebod- platiniferous |  | | Journal (article/letter/editorial) | | University of the Witwatersrand, PO Wits, 2050, South Africa CHRISTOPHER A. LEE¶ Anglo Platinum Geology...Department, PO Box 62179, Marshalltown, 2107, South Africa ROBERT P. SCHOUWSTRA Anglo Platinum Research...1412, South Africa PETER MELLOWSHIP Impala Platinum Mines, PO Box 5683, Rustenburg, 0300, South Africa...and eastern limbs of the Bushveld Complex, in South Africa. Grades for the mined reef interval are uniform...km of strike length, at 5–7 g/t, except for Union mine, where it is currently 8 g/t. The relative proportions |  | | Journal (article/letter/editorial) | | 0961-0128/82/75/1492-7$2.50 The detailed geologyof the Driekop dunRe pipe and surroundingarea hasbeen adequatelydescribed...lower criticalzone.Accordingto Sehiffries(1982)the Driekop dunitcpipe wasalsoformedby replacement;the cou...locallysplittingthe chromitite. 1452 INFLUENCE OF DRIEKOP Materials Studied and Methods Employed Materials...boreholesV4, DC5, DC6, DC7, and DC8 drilled on the farm Driekop DISTANCEFROM DRIEKOPPIPE [m)- The mineralogictechniquesutilized...these 1. 14:3:3 BOREHOLE NO- boreholesand the Driekop pipe are shownin Figure PIPE Approximate State |  | | Journal (article/letter/editorial) | | The unique geologicalpositionof the pipes has Driekop,playeda significantrole ashigh-gradeplat- been...three pipeswason the order of 15,000 ozs. Driekop was the last mine to ceaseoperationsin 1961. The disappearanceof...prehensive surveyof the platinummineralogyof the Driekop pipe was presentedby Tarkian and 0561-0125/$2/74/1419-1252...mineralogical difference between platinum-rich, 2. DRIEKOP 0 ::::... ß- o 20 40 ,. " 3. MOOIHOEK •__•...platinumgroup elements,sincea samplenear the contactof a chromite xenolithyielded a maximum assayvalue of 2,000 |  | | Journal (article/letter/editorial) | | into Placers: Case Studies Bushveld Complex, South Africa, and Great Dyke, Zimbabwe Thomas Oberthür Bundesanstalt...weathering cycle in the Bushveld Complex of South Africa and the Great Dyke of Zimbabwe. Samples were...PGM and Archean age (e.g., Bushveld Complex, South Africa; the Great Dyke, Zimbabwe; the Stillwater grains...“neoformation” a the Bushveld Complex in South Africa, of the Sudbury district in Canada, and later Norilsk in...the farm Maandagshoek, then eastern Transvaal, South Africa, led to the discovery of the largest PGE deposits |  | | Report (issue) | | 777 Z=1 X-ray Powder Pattern: Onverwacht mine, South Africa. 3.32 (100), 2.87 (100), 1.74 (100), 2.04...60 11.47 Total 98.3 98.7 100.42 (1) Driekop mine, South Africa; by electron microprobe, corresponding...Cobaltite group. Occurrence: In chromite in hortonolite dunite (South Africa); as inclusions in chrompicotites...pentlandite, nickeline, magnetite, chromite, olivine. Distribution: In South Africa, in the Merensky Reef, Bushveld...complex, Transvaal, from the Onverwacht [TL] and Driekop mines. At the Hitura Ni–Cu deposit, western Finland |  | | Journal (article/letter/editorial) | | its remarkable igneouslayering and enigmatic The Driekop orebodyis 18 to 25 m acrossand has ultramaficpegmatoidbodies...Itsaxisplunges transgressive dunite bodiesknown as the Driekop, 77 ø to the nothwest,which is nearly perpendicular...mined for platinum, the Driekop the basisof informationfrom otherpipes,the Driekop pipe is the focusof this...shapeand orientationasits orebody(Wagner,1929; The Driekop pipe crosscuts part of the upper crit- Heckroodt...Heckroodt, 1959). The composition of olivine from the Driekop oreical zonein the easternBushveldComplexand crops |  | | Journal (article/letter/editorial) | | platinum concentrates from the Driekop mine, Transvaal, South Africa. Conventional ore microscopy also...the Driekop mine, Transvaal, South Africa, which the author collected during a visit to the mine in 1957...approximate. Geological environment. The Driekop platinum mine is situated in the norites of the critical...remarkable that the occurrence of platinum pipes (Driekop, Onverwacht, Mooihoek) in this part of the Bushveld...dealing with the petrography of the rocks in the Driekop area, failed to establish any relationship between |  | | Journal (article/letter/editorial) | | Platinum-group minerals of concentrates from the Driekop platinum pipe, Eastern Bushveld Complex – Tribute...concentrates originating from the Driekop platinum mine, South Africa, collected and first described by...by E. F. Stumpfl (1961), were investigated. Driekop is one of several zoned dunite pipes crosscutting...in the Bushveld Complex. The concentrates from Driekop contain single and polyphase grains, 5 to 500 µm...PGE sulpharsenides. Key words: Bushveld Complex, Driekop, dunite pipe, platinum-group minerals. Introduction |  | Günther, T., Haase, K.M., Junge, M., Oberthür, T., Woelki, D., Krumm, S. (2018) Oxygen isotope and trace element compositions of platiniferous dunite pipes of the Bushveld Complex, South Africa – Signals from a recycled mantle component?. Lithos, 310. 332-341 doi:10.1016/j.lithos.2018.04.017 | Journal (article/letter/editorial) | | platiniferous dunite pipes of the bushveld complex, South Africa – Signals from a recycled mantle component?...platiniferous dunite pipes of the bushveld complex, South Africa – Signals from a recycled mantle component?...platiniferous dunite pipes of the Bushveld Complex, South Africa – Signals from a recycled mantle component?...isotope data of olivine and pyroxene from the Driekop, Mooihoek and Onverwacht pipes show that the parental...(Cawthorn et al., 2006; Eales and Cawthorn, 1996). The Driekop, Mooihoek and Onverwacht pipes (Fig. 1) have diameters |  | Scoon, Roger N., Mitchell, Andrew A. (2019) Discussion of “Oxygen isotope and trace element compositions of platiniferous dunite pipes of the Bushveld Complex, South Africa - Signals from a recycled mantle component?” by Günther, T., Haase, K.M., Junge, M., Oberthür, T., Woelki, D., and Krumm, S. Lithos, 324. 893-898 doi:10.1016/j.lithos.2018.09.023 | Journal (article/letter/editorial) | | platiniferous dunite pipes of the Bushveld complex, South Africa - Signals from a recycled mantle component?”...platiniferous dunite pipes of the Bushveld complex, South Africa - Signals from a recycled mantle component?”...platiniferous dunite pipes of the Bushveld Complex, South Africa - Signals from a recycled mantle component?”...University, Grahamstown 6140, South Africa 2 PO Box 421, McGregor 6708, South Africa MA NU SC 1 TE D...platiniferous dunite pipes of the Bushveld Complex, South Africa in many respects. The attempt to suggest there |  | | Journal (article/letter/editorial) | | 4000, South Africa AND ROGER N. SCOON Postnet Suite 291, Private Bag X31, Knysna 6570, South Africa...orthopyroxenite, bounded top and bottom by thin chromite stringers. The wide-reef Merensky reef facies...feldspathic orthopyroxenite is developed below the lower chromite stringer, and a second pegmatoidal orthopyroxenite...developed several centimeters above the upper chromite stringer. In contrast to most occurrences in the...compositions of orthopyroxene, plagioclase, and chromite, the dominant rock-forming minerals, whereas the |  | | Journal (article/letter/editorial) | | Springer-Verlag 1975 Platinum Mineralogy of the Driekop Mine, South Africa M. TARKIAN and E. F. STUMPFL* Hamburg...investigation of concentrates from the Driekop platinum mine, South Africa, has resulted in significant additions...stibiopalladinite, PtSb is actually (Pt, Pd)aSb2. The Driekop platinum group minerals association is dominated...pipes. Introduction Platinum Mineralization at Driekop, Eastern Transvaal, occurs in a pipe-like body...of the critical zone of the Bushveld Complex. The mine is now dormant: it was in operation until 1961. |  | | Journal (article/letter/editorial) | | from the early Proterozoic Bushveld Complex, South Africa Jacob Adetunji a , Simon Everitt a,b , Hugh...Rhodes University, P.O. Box 9, Grahamstown 6140, South Africa a r t i c l e i n f o Article history: Received...2013 Available online 11 January 2013 Keywords: Chromite Bushveld Mantle redox Mössbauer Geochemistry ...Rustenberg Layered Suite of the Bushveld Complex, South Africa vary between 0.139 and 0.232 (mean = 0.185 ±...mantle redox conditions is the mineral chromite, for chromite has the capacity to record the oxidation |
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