| | 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 ........................... | | | Report (issue) | Federal Republic of Germany, the Republic of South Africa, and the United States of America Major geologic...Federal Republic of Germany, the Republic of South Africa, and the United States of America 1984 C I...Products Section, U. S. Geological Survey, 604 South Pickett Street, Alexandria, VA 22304 FOREWORD...(EMR), Geological Survey of Canada; Ian Goldberg, South African Department of Mineral and Energy Affairs...each country having a major chromite deposit or district--------------------------------7. By economic | | | Journal (article/letter/editorial) | Upper Critical Zone, Rustenburg Layered Suite, Northam Platinum Mine, South Africa D. L. R EID* AND I...of Cape Town, Private Bag Rondebosch, 7700, South Africa ABSTR ACT Discordant veins, pipes and occasionally...cumulate sequence of the Upper Critical Zone, Rustenburg Layered Suite, Bushveld Complex. These pegmatite...Northam Platinum Mine, situated in the Swartklip Facies of the western lobe of the Rustenburg Layered...Rustenberg Layered Suite, Bushveld Complex, South Africa. Introduction THE presence of iron-rich ultrama | | | Journal (article/letter/editorial) | Johannesburg, South Africa, 2SRK Consulting, Northlands 2116, Johannesburg, South Africa and 3MMG Limited...Avenue, Oxford Corner, Rosebank, Johannesburg, South Africa Downloaded from http://petrology.oxfordjournals...sill-like injection of magma rich in sulphur and platinum-group elements (PGE) into pre-existing cumulates;...are lacking. The most telling observations are: local transgressions of the MR by younger potholes; widespread...Bushveld Complex; potholes; basal magma layers; platinum-group elements; chromitite seams; sulphide liquid; | | Roberts, M. D., Reid, D. L., Miller, J. A., Basson, I. J., Roberts, M., Smith, D. (2007) The Merensky Cyclic Unit and its impact on footwall cumulates below Normal and Regional Pothole reef types in the Western Bushveld Complex. Mineralium Deposita, 42 (3) 271-292 doi:10.1007/s00126-006-0111-5 | Journal (article/letter/editorial) | Cyclic Unit (MCU). In the Swartklip Facies of the Rustenburg Layered Suite, the occurrence of widespread thermal...In the Regional Pothole Reef at the Northam Platinum Mine, several economic reef types are identified...Sciences, University of Cape Town, Rondebosch 7701, South Africa J. A. Miller (*) Department of Geology, University...X1, Matieland 7602, South Africa e-mail: jmiller@sun.ac.za M. Roberts 140 North Wilson Avenue, no. 7...USA D. Smith Northam Platinum Mine, P.O. Box 441, Thabazimbi 1380, South Africa Present address: I. J | | | 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 | | 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) | ARTICLE The Bushveld Complex, South Africa: formation of platinum– palladium, chrome- and vanadium-rich...October 2012 # Springer-Verlag 2012 Abstract Platinum-group element (PGE) deposits in the Bushveld Complex...Northam platinum mines, 2 Union platinum mine, 3 Impala platinum mines, 4 Rustenburg platinum mine, 5 Western...Western platinum and Karee mines, 6 Crocodile River mine, 7 Messina platinum mine, 8 Atok platinum mine...mine, 9 Maandagshoek section with Modikwa platinum mine, 10 Mineral Range and Sheba’s Ridge deposit, 11 Rooipoort | | | Journal (article/letter/editorial) | Springer-Verlagt991 Petrogenesis of the Merensky Reef in the Rustenburg section of the Bushveld Complex D . M . Nicholson...petrogenetic model for the Merensky Reef in the Rustenburg section of the Bushveld Complex has been developed...Merensky Reef is famous for its enrichment in the platinum group elements (PGEs), and its remarkable regularity...pegmatoid and associated rocks in the Rustenburg section of Rustenburg Platinum Mines in the southwest sector...petrographically and by electron microprobe. At Rustenburg the reef ideally is constituted as a pegmatoidal | | Yudovskaya, M. A., Kinnaird, J. A., Sobolev, A. V., Kuzmin, D. V., McDonald, I., Wilson, A. H. (2013) Petrogenesis of the Lower Zone Olivine-Rich Cumulates Beneath the Platreef and Their Correlation with Recognized Occurrences in the Bushveld Complex. Economic Geology, 108 (8) 1923-1952 doi:10.2113/econgeo.108.8.1923 | Journal (article/letter/editorial) | the Witwatersrand, Private Bag 3, Wits 2050, South Africa Planck Institute for Chemistry, Post Office...in the northern limb of the Bushveld Complex (South Africa). The Lower zone is separated from the overlying...Bushveld Complex of South Africa comprises three main intrusive suites: the Rustenburg Layered Suite, the...ultramafic intrusion forming the roof of the Complex (South African Committee for Stratigraphy, 1980; Cawthorn...et al., 2006). Mafic-ultramafic rocks of the Rustenburg Layered Suite occur in five separate basins (termed | | | Journal (article/letter/editorial) | Chromitite–(Ortho)pyroxenite Cumulate Section, Bushveld, South Africa Shahrzad Manoochehri1*, Max W. Schmidt1 and...and 2Modikwa Platinum Mine, 292KT Onverwacht Hill, Steelport Region, Mpumalanga South Africa *Corresponding...Upper Critical Zone of the Bushveld Complex (South Africa) has been studied. The cumulates in the studied...Supergroup (e.g. Barnes & Maier, 2002). Based on the South African Commission for Stratigraphy (SACS, 1980)...the Complex is composed of three units: (1) the Rustenburg Layered Suite (RLS); (2) the granophyres and | | | Journal (article/letter/editorial) | 535 THE PLATREEF OF THE BUSHVELD COMPLEX, SOUTH AFRICA: A NEW HYPOTHESIS OF MULTIPLE, NON-SEQUENTIAL...BASED ON OBSERVATIONS AT THE AKANANI PROJECT, NORTH-WEST OF MOKOPANE A.A. MITCHELL School of Geological...KwaZulu-Natal, Private Bag X54001, Durban, 4000, South Africa e-mail: mitchaa@mweb.co.za R.N. SCOON Department...6140, South Africa e-mail: rnscoon@iafrica.com © 2012 December Geological Society of South Africa ABSTRACT...in the northern limb of the Bushveld Complex, South Africa, has afforded new perspectives on the Platreef | | | Journal (article/letter/editorial) | characteristic section exposed in a wall in the Middelpunt mine, northeast Bushveld Complex. In this region the...impermeable. The anorthosite lenses in the pegmatoid mark local areas of relatively high degrees of hydration partial...relatively low permeability, causing extensive local modifications. The original layering may further...Merensky reef and the UG2 chromitite, the two major platinum group element (PGE)-rich layers, formed. This...sector of the eastern Bushveld Complex. Here, the Rustenburg layered suite forms an arcuate outcrop pattern | | | Book | revised edition) 2 2 . N. DEKUN MINERAL ECONOMICS OF AFRICA 2 3 . B.L GULSON LEAD ISOTOPES IN MINERAL EXPLORATION...Ores DEVELOPMENTS IN ECONOMIC GEOLOGY, 2 6 platinum-group element exploration Dennis L. Buchanan Department...will never be spoken. " P. A. WAGNER, The platinum South Africa deposits so be alluring prophesied and... Foirewoird. The platinum-group elements rhodium, ruthenium, (PGE) include platinum, iridium and osmium...as well a s major industrial uses. a permanent Platinum has aesthetic qualities, combined lustre, which | | | Journal (article/letter/editorial) | in the western limb of the Bushveld Complex, South Africa: evidence for extensive melt migration within...Lower Zone Introduction The Bushveld Complex of South Africa, forming the world’s largest layered intrusion...hosts the most important 13 60 Page 2 of 18 platinum-group element (PGE), chromite and vanadiferous...and (4) layered mafic–ultramafic rocks of the Rustenburg Layered Suite (RLS) as the most voluminous group...areas, known as limbs, covering >100,000 km2 of South Africa (Fig. 1). The igneous succession reaches up | | | Journal (article/letter/editorial) | Platreef igneous rocks and the development of platinum group element (PGE) mineralisation, but that there...Complex, South Africa, is currently one of the most extensively explored deposits of platinum-group elements...been broadly correlated by some authors with the Rustenburg Layered Suite (RLS) present in the eastern and...developed south of the town of Mokopane, and as satellite bodies within the floor rocks north of the town...that the Lower Zone extends for a limited distance north of Mokopane, with a series of serpentinised peridotites | | | Journal (article/letter/editorial) | Durban-Westville, Private Bag X54001, Durban 4000, South Africa Abstract Lacking the pronounced modal layering...Borehole H5, which is situated approximately 5 km west of the town of Brits, in the southern sector of...(Mitchell, 1990a), and approximately 1460 m thick at Rustenburg (Meyer, 1969), which represents an intermediate...illustrated by Mitchell (1990a) from Rustenburg Platinum Mines Union Section, in the postulated proximal...appears to be laterally impersistent, even on a local scale. It does, however, occur at the base of a | | Naldrett, A. J., Wilson, Allan, Kinnaird, Judith, Yudovskaya, Marina, Chunnett, Gordon (2012) The origin of chromitites and related PGE mineralization in the Bushveld Complex: new mineralogical and petrological constraints. Mineralium Deposita, 47 (3) 209-232 doi:10.1007/s00126-011-0366-3 | Journal (article/letter/editorial) | Smuts Avenue, Braamfontein, 2000 Johannesburg, South Africa e-mail: ajn2306@aol.com M. Yudovskaya IGEM RAS...ultramafic intrusion extending 450 km east–west and 350 km north–south. The country rocks consist mainly of...form the footwall to the complex in the extreme north. Although the Bushveld is known primarily for its... the introduction and crystallization of the Rustenburg layered series, along with related dykes and...sequence of mafic/ultramafic rocks constituting the Rustenburg Layered Series. Melting of roof rocks resulted | | Yudovskaya, M. A., Kinnaird, J. A., Udachina, L. V., Distler, V. V., Kuz’min, D. V. (2014) Role of magmatic and fluid concentrating in formation of platinum mineralization in the Lower Zone and Platreef as follows from composition of phlogopite, cumulus silicates, and sulfide melt, the northern limb of Bushveld Complex. Geology of Ore Deposits, 56 (6) 451-478 doi:10.1134/s1075701514060063 | Journal (article/letter/editorial) | Magmatic and Fluid Concentrating in Formation of Platinum Mineralization in the Lower Zone and Platreef...the Witwatersrand, 2050 Wits, Johannesburg, South Africa c Sobolev Institute of Geology and Mineralogy...of ultramafic intrusion forming its roof, the Rustenburg Layered Suite, the Lebowa Granite Suite, and...2006). The mafic and ultramafic rocks of the Rustenburg Suite occur in five separate magmatic basins... 25°15′ S Groblersdal Fault Far western limb Rustenburg Western limb Johannesburg Southeastern limb 100 | | Pronost, Julie, Harris, Chris, Pin, Christian (2008) Relationship between footwall composition, crustal contamination, and fluid–rock interaction in the Platreef, Bushveld Complex, South Africa. Mineralium Deposita, 43 (8) 825-848 doi:10.1007/s00126-008-0203-5 | Journal (article/letter/editorial) | interaction in the Platreef, Bushveld Complex, South Africa Julie Pronost & Chris Harris & Christian Pin...the 2.06-Ga Bushveld Complex, the Platreef is a platinum group elements (PGE)-, Cu-, and Ni-mineralized...that developed at the intrusion margin. From north to south, the footwall rocks of the Platreef change...of the Bushveld. These data are consistent with local contamination of an already contaminated magma of...isotopes . Contamination . Fluid–rock interaction . South Africa C. Harris (*) Department of Geological Sciences | | | Journal (article/letter/editorial) | ECONOMIC NOVEMBER, GEOLOGISTS 1988 No. 7 The J-M Platinum-Palladium Reef of the StillwaterComplex,Montana:...not just the Pt-Pd of 10 to 15 km (from southto north down the axis depositsof the Stillwaterand BushveldComplexes...The path from U0 has the crystallizationorder forsterite,Ca-poorpyroxene,anorthite,diopside--whichapproximates...two-pyroxenegabbro.The path from A0 gives anorthite, forsterite,diopside,Ca-poor pyroxene-akin to the order of...ascanbe seenin Figure fractionation; peridotite= forsterite; bronzitite= Ca-poorpyrox6A, it arisesessentiallybecauseliquid | | | 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...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) | shifts following cation substitution between forsterite and fayalite. We present a calibration for extracting...samples spanning the compositional range from forsterite to fayalite were used to develop the calibration...Finch-Robie Forsyth Iron Mine, Hull, Quebec, Canada Rustenberg, Transvaal, South Africa LAP02224,24 Synthetic...basaltic shergottite, xenocrysts Large polished forsterite grain NASA, JSC Meteorite Curatorial Facility...Hofmeister Twin Sisters Range, Washington, USA Forsterite 204 Dunite Synthetic, HUPS 433 Burminco (#1390-A) | | | Journal (article/letter/editorial) | D. F. Frasch•, Manager,Mineral SurveyDepartment,Union CarbideOre Company,was in administrative chargeandencouraged...samplingand for loggingsomeof the drill holes. To Union CarbideOre Company,we are greatlyindebtedfor makingmaterialsand...sectionbetween the Steelpoort River and Farm Jagdlust. South of this sector, however, the stratigraphic section...Cameronsuggestthat marked changes may alsooccurnorthwestand west of Farms Zeekoegatand Jagdlust,beyond the limits...ZOl"le' FIG. 3. Section of the Bushveldnorite north of Steelpoort,after A. L. Hall, showingthe major | | | Report (issue) | Publications, Ltd., Gardenvale, Que. ; in the Union of South Africa from Central News Agency, Ltd., P.O. Box...nominated by tho High Commis sioner for the Union of South Africa. Professor V. G. Shepheard, R.C.N.C., nominated...Commissioner for India. T. Henry Turner, M.Sc. (London and North Eastern Railway Co.). J. L. F. Vogel, M.I.E.E.,...Rhodesia Tanganyika Union of South Africa . . Canada Newfoundland British North Borneo Cyprus India Australia...64 66 67 69 70 70 71 71 74 Vi PAGE French West Africa Madagascar Cuba .. Costa Rica Guatemala Puerto | | | Book | HYDROMAGMATIC PROCESSES AND PLATINUM-GROUP ELEMENT DEPOSITS IN LAYERED INTRUSIONS The role that hydrothermal...importance for the understanding of the formation of platinum-group deposits in layered intrusions. It discusses...of the platinum-group elements (PGE). Using examples from the Bushveld complex of South Africa and other...the role of igneous fluids in the petrogenesis of platinum-group element (PGE) deposits in layered intrusions...observed features. HYDROMAGMATIC PROCESSES AND PLATINUM-GROUP ELEMENT DEPOSITS IN LAYERED INTRUSIONS ALAN |
|