 | | 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) | | 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...ultramafic pipes, Bushveld Complex, Republic of South Africa. SOMMAIRE Les pipes ultramafiques de Onverwacht...The Merensky Reef in the Bushveld Complex, in South Africa, was discovered at about the same time (1924) |  | | 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 © 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...core-zone of massive Fe-Ti oxides was the last SOUTH AFRICAN JOURNAL OF GEOLOGY 2017 âą VOLUME 120.2 PAGE |  | | 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) | | Platinum-group minerals of concentrates from the Driekop platinum pipe, Eastern Bushveld Complex â 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 ”m...PGE sulpharsenides. Key words: Bushveld Complex, Driekop, dunite pipe, platinum-group minerals. Introduction |  | | Journal (article/letter/editorial) | | into Placers: Case Studies Bushveld Complex, South Africa, and Great Dyke, Zimbabwe Thomas OberthĂŒr Bundesanstalt...weathering cycle in the Bushveld Complex of South Africa and the Great Dyke of Zimbabwe. Samples were...variable proportions of Pd and Rh are hosted in pentlandite. PtâFe alloys, sperrylite, and most PGE-sulfides...PGM and Archean age (e.g., Bushveld Complex, South Africa; the Great Dyke, Zimbabwe; the Stillwater grains...âneoformationâ a the Bushveld Complex in South Africa, of the Sudbury district in Canada, and later Norilsk in |  | | 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 |  | 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 OBERTHĂR§, 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 northâsouth, 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) | | platinum able information on the ores from the Union mine platinumdeposits.When onebf us (EFS) pubby Kingston(1966)...oĆBrynard et al. (1976), cent sperrylite. At Union mine, laurite and ferroVermaakandI-Iendriks(1976), andGasparriniand...Platinum-Group Minerals in the Merensky Reef and in the Driekop Pipe Atok, Mineral Platinum-iron alloy (Pt, Fe)...platinum* Transvaal** and the silicates are common." Driekop*** 6.4 2 50 50.3 2 30 -- Hollingworthite...1453 TABLIâą 3. Compositional Variations of Pentlandite Ni Fe Co Rh (Ni,Fe)9 S8 Nizhnii with Fe: |  | | 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) | | 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) | | 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...core-zone. All of the iron-rich ultramafics at Driekop are distinguished by the absence of a spinel phase...(Fo85.1) suggest that the magnesian dunite in the Driekop pipe is orthomagmatic. This hypothesis is supported |  | | Journal (article/letter/editorial) | | was 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 associatedwith...parageneses with magnetite and with serpentine and pentlandite interstitial to chromite in the Bird River Sill...types. A disseminatedpyrrhotite + chalcopyrite + pentlandite + cubanite assemblageenriched in PGE occurs in... and sulfides. The sulfides are pyrrhotite, pentlandite, chalcopyrite, and cubanite. Pyrrhotite containing |  | | 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) | | 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) | | University] at 17:41 09 June 2016 TaEnaleh, Norilâsk District, Siberia, Russia U ntil a few years ago, the...fact, this find and a historical locality in South Africa for which specimens are not available represented...most common platinum mineral. It occurs with pentlandite, chalcopyrite, and pyrrhotite in sulfide ores...layered intrusive bodies such as the Bushveld (South Africa) and Stillwater (Montana) Complexes. In addition...Great Eastern mine, Clark County, Nevada. It is an ore mineral in the active Pt-Pd mine and related occurrences |  | Scoon, Roger N., Mitchell, Andrew A. (2019) Discussion of âOxygen isotope and trace element compositions of platiniferous dunite pipes of the Bushveld Complex, South Africa - Signals from a recycled mantle component?â by GĂŒnther, T., Haase, K.M., Junge, M., OberthĂŒr, 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?â...platiniferous dunite pipes of the Bushveld complex, South Africa - Signals from a recycled mantle component?â...platiniferous dunite pipes of the Bushveld Complex, South Africa - Signals from a recycled mantle component?â...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 |  | | 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...Occurrence: In chromite in hortonolite dunite (South Africa); as inclusions in chrompicotites (Bulgaria);...gersdorffite, pentlandite, nickeline, magnetite, chromite, olivine. Distribution: In South Africa, in the Merensky...complex, Transvaal, from the Onverwacht [TL] and Driekop mines. At the Hitura NiâCu deposit, western Finland |  | | Journal (article/letter/editorial) | | differentiatingthe oresin the vicinity (north and south) of the PilansbergAlkaline Complexfrom thoseof the...MerenskyReef occursalmostwholly in solidsolutionwithin pentlandite,whereasRh mineralsoccur in the UG-2 layer. Chromite...alsoen- nificantrhodiumonly asa solidsolutionin pentlandite. A very definite association between laurite...UG-2 layer. The region around the dunite pipe at Driekop (Peyerl,in press)is in effect a microcosmof riched...within thesetwo mineralizedlayersis in fact one of Driekop will be discussedbelow in relation to the the majorfeaturesof |  | | Report (issue) | | 797 Z=4 X-ray Powder Pattern: Onverwacht mine, South Africa (ruthenian). 3.31 (10), 2.87 (10), 1.74 (1)...02 14.99 Total 99.4 100.0 100.19 (1) Driekop mine, South Africa; by electron microprobe, corresponding...geversite, erlichmanite, irarsite, PtâFe alloys (South Africa); chalcopyrite, cobaltite, gersdorffite, pyrrhotite...braggite, sperrylite, cobaltite, pyrrhotite, pentlandite, pyrite, chalcopyrite (Stillwater complex, Montana...mineral. In South Africa, in the Merensky Reef, Bushveld complex, Transvaal, from the Driekop [TL], Onverwacht |  | | Journal (article/letter/editorial) | | few cases laurite is surrounded by a ruthenian pentlandite containing up to 12% Ru. Laurite and Os-Ir-Ru...Mineral Os-rich laurite Pentlandite R% Ru has also been recorded in pentlandite in several cases. The...The Ru-rich pentlandite has always been found adjacent to PGM's and usually surrounds laurite or irarsite...irarsite. An analysis ofRu-rich pentlandite is given in Table 3, showing as much as 12% Ru. Genkin et al. (1974)...(1974) also record a Rurich pentlandite associated with irarsite from a serpentinised dunite which they |  | | Report (issue) | | = 12 X-ray Powder Pattern: Tweefontein Farm, South Africa. 2.236 (100), 2.194 (100),1.279 (50),1.228 (50)...100.9 100.00 Total 100.5 (1) Tweefontein Farm, South Africa; by electron microprobe, corresponding to (Pd4...genkinite, platarsite, chromite, chalcopyrite, pentlandite, pyrrhotite, geversite, gold, violarite. Distribution:...Alaska. In Transvaal, South Africa, from Tweefontein Farm, Potgietersrust district, and from the Elephant...Winze, near Rietfontein; at the Onverwacht and Driekop mines. From the Department of Choco, Cauca, Colombia |  | | Journal (article/letter/editorial) | | the Platreef at the Sandsloot Mine, northern Bushveld Complex, South Africa D. A. HOLWELL1, I. MCDONALD1...K EY WORDS : PGM, Bushveld Complex, South Africa, Sandsloot mine, Platreef, Pt, Pd, base-metal sulphides...sulphides. Introduction THE Bushveld Complex of South Africa is the largest layered igneous intrusion in...Anglo Platinum, at the Sandsloot and Zwartfontein South pits ~30 km northwest of the town of Mokopane (formerly...the RLS. The geology of the Platreef at Sandsloot Mine has been described by Harris and Chaumba (2001) |  | | Journal (article/letter/editorial) | | and, paradoxically,many of the discorthe famous Driekop, Mooihoek, and Onverwacht dant bodies of ultramarie...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...priseonly four occurrences;those on the farms Driekop, Iron-Rich Ultramarie Pegmatite Regionaldistribution...is rarely observedbelow the Fo73 to Fo43 and at Driekop the latter is middle of the main zone. In the upper |  | | Report (issue) | | 112(9) X-ray Powder Pattern: Tweefontein Farm, South Africa. 2.236 (100), 2.194 (100), 1.279 (50), 1.228...100.5 100.9 100.00 (1) Tweefontein Farm, South Africa; by electron microprobe, corresponding to (Pd4...chalcopyrite, pentlandite, pyrrhotite, geversite, gold, violarite. Distribution: In Transvaal, South Africa, from...Potgietersrus district [TL], and from the Elephant Winze, near Rietfontein; at the Onverwacht and Driekop mines... Bushveld complex. In Russia, from the Morozova mine, Norilâsk region, western Siberia; at Zlatoust, |
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