 | | Journal (article/letter/editorial) | | Origin of Witwatersrand gold: a metamorphic devolatilisationâhydrothermal replacement model G. Neil Phillips*1...around the margin of the Archaean Witwatersrand Basin of South Africa associated with regional greenschist...deformation. Metamorphic mineral assemblages involving pyrophyllite-chloritoid are associated with gold in all goldfields...indicating high geothermal gradients. The origin of Witwatersrand gold can be explained by metamorphic devolatilisation...generate auriferous fluids beneath and outside the Witwatersrand Basin, followed by passage of these fluids along |  | | Journal (article/letter/editorial) | | 2361-2369 PYRRHOTITE IN THE WITWATERSRAND GOLD FIELDS, SOUTH AFRICA TAIHE ZHOU, G. NEIL PHILLIPS*...rocks(Rmndohr, 1958;FeatherandKoch,1975;Hall- Witwatersrand goldfield(approx 100)weredevoidof pyrrhotite, andmost...reefat thetopof theWitwatersrand SuperTheArchean Witwatersrand Supergroup isa ca.8-km-thicktersdorp composition...atWestDriefontein, WestRandConimmediately overlying the Witwatersrand Supergroup have at Blyvoor, WesternDeepLevels...KimberleyReef Middelvlei Reef GreenBar North Reef ⢠Pyrophyllite/chloritoid m o Oamlinitereported) KyaniteJandalusit⢠|  | | Journal (article/letter/editorial) | | rietonviIi e G o d M i n e s witwatersrand Goldfield, South Africa Downloaded by [University of Bath]...Mponeng Mine P.O. Box 8104 Western Levels, 2501 South Africa dkershaw @ anglogold.com BRUCE CAIRNCROSS Department...University P.O. Box 524 Auckland Park, 2006 Gauteng, South Africa bc@na.rau.ac.za BRENDA FREESE Mineral Resource...Mponeng Mine P.O. Box 8104 Western Levels, 2501 South Africa bfreese@anglogold.com Figure 1. A panoramic...crystals of pyrrhotite and cubanite in southern Africa were recently discovered at one of the deepest |  | Large, R. R., Meffre, S., Burnett, R., Guy, B., Bull, S., Gilbert, S., Goemann, K., Danyushevsky, L. (2013) Evidence for an Intrabasinal Source and Multiple Concentration Processes in the Formation of the Carbon Leader Reef, Witwatersrand Supergroup, South Africa. Economic Geology, 108 (6) 1215-1241 doi:10.2113/econgeo.108.6.1215 | Journal (article/letter/editorial) | | Formation of the Carbon Leader Reef, Witwatersrand Supergroup, South Africa* Ross R. Large,1,â Sebastien Meffre...Johannesburg, South Africa of Geology, University of Johannesburg, Auckland Park, 2006, South Africa Science...and gold from the Carbon Leader Reef in the Witwatersrand basin provide new evidence that a significant...two competing theories for the origin of the Witwatersrand gold reefs are likely to be correct. We suggest...the conglomerates of the Witwatersrand basin, the worldâs greatest goldfield, has been hotly debated. |  | | Book | | Struik Nature (an imprint of Penguin Random House South Africa (Pty) Ltd) Reg. No. 1953/000441/07 The Estuaries...Century City, 7441 PO Box 1144, Cape Town, 8000 South Africa Visit www.randomstruik.co.za and join the Struik...published edition, 2015: Penguin Random House South Africa (Pty) Ltd Publisher: Pippa Parker Managing editor:...Hatfield Campus, University of Pretoria Pretoria, South Africa Dr Lynnette Greyling Department of Geological...Town Private Bag X3 Rondebosch 7701 Cape Town, South Africa Note: The authors and the publishers cannot |  | | 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) | | 543â558. Auriferous Precambrian Conglomerates of Witwatersrand I. M. Simanovich Geological Institute, Russian...mineralogical specificity of the worldâs largest Witwatersrand gold deposit was defined by geodynamic processes...Numerous conglomerate interbeds were formed in the Witwatersrand Basin section due to vigorous eolian processes...model of the origin of gold mineralization in Witwatersrand, suggesting a hydrothermal-metamorphic redistribution...10.1134/S0024490209050071 The Precambrian Witwatersrand Basin is the worldâs largest source of gold |  | | Journal (issue) | | Twenty-three, Number Three ÂŽ Articles Gold in South Africa ..............................................Record, ,¡olume 23 , Ma.,¡-June. 1992 GOLD IN SOUTH AFRICA Bruce Cairncross Department of Geology Rand...Afrikaans University P.O. Box 524 Johannesburg 2000 South Africa Carl R. Anhaeusser Economic Geology Research...the Witwatersrand P.O. Wits 2050 Johannesburg South Africa Gold has been mined in South Africa for over...has been won from conglomerate reefs of the Witwatersrand goldfields, where production from individual | | | Journal (issue) | | Mowry Place Tucson, AZ 85741 Articles Gold in South Africa ..............................................Afrikaans University P.O. Box 524 Johannesburg 2000 South Africa Carl R. Anhaeusser Economic Geology Research...O. Wits 2050 Johannesburg South Africa Gold has been mined in South Africa fo r over a century. Most...has been won from conglomerate reefs o f the Witwatersrand goldfields, where production from individual...INTRODUCTION Gold was mined in pre-European times in South Africa by the indigenous tribes. Most of the gold was |  | | Book (edition) | | OF OF SOUTH AFRICA MINES GEOLOGICAL SURVEY MINERAL RESOURCES OF REPUBLIC OF THE SOUTH AFRICA...Second World War, and partly as a result of it, South Africa experienced vast industrial expansion. This...official âhandbook on the mineral resources of South Africa, it has become necessary to revise, or rather...reason of the great diversity and magnitude of South African mineral deposits and local mining operations...Chamber of Mines of South Africa with Mr G. H. Grange as co-ordinator, and the South, African mining industry; |  | | Book (edition) | | critical in the USA, but in the Republic of South Africa (RSA), a major source of all three, they are...this are likely to be sulphur, baryte, talc and pyrophyllite. Growth rates are expected to rise steadily...and uranium is an important by-product of many South African gold ores. Among industrial minerals the...develop the 450+ Mt eu-U-Au Roxby Downs Project in South Australia, Western Mining Corporation and British...Australia, along a 2400 km belt from Queensland to New South Wales, there are hundreds ofpipes in and close to |  | | Book | | and uranium is an important by-product of many South African gold ores. The properties of a mineral govern...occur along a 2400 km belt from Queensland to New South Wales. Most have quartz fillings and some are mineralized...copper-bearing breccia pipes of Messina in South Africa (Jacobsen & McCarthy 1976). Fig. 2.6. Plan...mining areas of the beach sand deposits of Crowdy South Wales, Australia. (After Winward 1975.) 15 concordant...is won from Precambrian deposits of this type in South Ne Fig. 2.14. \ Distribution of pay-streaks |  | | Book | | LE CONGLOMERATE AND QUARTZITE TYPE 335 The Witwatersrand / 336 14-1 GREGORY,J. W: The Origin of Gold...14-4 MELLOR, E. T.: The Conglomerates of the Witwatersrand / 373 Inst. Mining and Metallurgy Trans. 25:261-291...Origin of Gold and Radioactive Minerals in the Witwatersrand System, the Dominion Reef, the Ventersdorp Contact...Contact Reef and the Black Reef / 404 Geol. Soc. South Africa Trans. 58:218-222 (1955) 14-6 PRETORIUS, D.... A.: The Depositional Environment of the Witwatersrand Goldfields: A Chronological Review of the Speculations |  | | Report (issue) | | views of the famous Mesoarchean Witwatersrand Supergroup in South Africa that contains Earthâs largest...Atmospheric Evolution 6. The sedimentary setting of Witwatersrand placer mineral deposits in an Archean atmosphere.........................105 W.E.L. Minter 7. Witwatersrand gold-pyrite-uraninite deposits do not support...glacier-associated sediments of the Neoproterozoic of south China: Oceanic anoxia or sulfate limitation? .....4-billion-year-old biogenic pyrites from Barberton, South Africa: Sulfur isotope evidence: Science, v. 262, p |  | | Book | | Corporation of South Africa, the Chair of Economic Geology at Rhodes University, South Africa, and since...appointments at the Astrobiology Centre, University of New South Wales, Sydney, and the China University of Geosciences...which has included work in Europe, southern Africa, South East Asia, New Zealand, the southwest Pacific...Felsic Phase of the Bushveld Igneous Complex, South Africa . . . . . . . . . . . 4.3.6 The Sn-W Deposits.... . . . . . . . 4.4.4 Sabie-Pilgrimâs Rest, South Africa . . . . . . . . . . . . . . . . . 4.4.5 Capricorn |  | | Book | | Eastern Goldfields, Western. Australia Barberton, South Africa Eastern Goldfields, Western Australia Manitoba... Large layered complexes Bushveld Complex, South Africa Stillwater Complex, USA Great Dyke, Zimbabwe...Skaergaard, Greenland 4. Kimberlites Kimberly, South Africa B, Intrusions in cratonic areas Diamond C...Bushveld, South Africa Great Dyke, Zimbabwe Sudbury, canada Bushveld, South Africa Bushveld, South Africa...Australia Pechanga, Russia Diamond Kimberly, South Africa Yakutia, Russia Kimber lites Carbonatite complexes |  | | Book (edition) | | mining companies took him to the Far East, South and East Africa, North America, and most of the countries...fields, chiefly from the Congo Republic, Ghana, South Africa, and Sierra Leone. For the five-year period...000; 1,600,000; South Africa, 2,900,000; Sierra Angola, 1,300,000; South West Africa, 920,000; Tanganyika...metric carats. (b) by value: South West Africa, ÂŁ16,500,000 sterling ; South Africa, ÂŁ16,100,000; Congo Republic... 45 Congo Republic South Africa Sierra Leone Angola YJ), south West Africa WY, Tanganyika Y, Ivory |  | | Book (volume) | | Papers and Discussions Volume I , I JOHANNESBURG SOUTH AFRICAN INSTITUTE OF MINING AND METALLURGY 1961... 01", ~TALLUf>iYY. Š Copyright 1961 by The South African Institute of Mining and Metallurgy Ext'racts...I (1v DEC 196f Printed in t!te Republic of South Africa by Hortors Limited, Johannesburg V r. 1 The...and n1anagement of the gold mining industry in South Africa -C. B. ANDERSON . . . . . . . . . page r J ... ( 2. The economy of the Union of South Africa-W. J. BusSCI-IAU 9 3. An introduction to the physical |  | Fuerstenau, Maruice C., Palmer, Bruce R. - Eds. (1983) Gold, Silver, Uranium, and Coal - Geology, Mining, Extraction and the Environment. The American Institute of Mining, Metallurgical and Petroleum Engineers, Inc., New York. | Book | | Metallurgical Engineering South Dakota School of Mines and Technology Rapid City, South Dakota Bruce R. Palmer...Professor of Metallurgy South Dakota School of Mines and Technology Rapid City, South Dakota Published by...Uranium, and Coalâ was convened in Rapid City, South Dakota on September 18-20, 1980. The Black Hills...assistance with the photographic work. Rapid City, South Dakota October 1, 1982 Maurice C. Fuerstenau Bruce...Chairman M.C. Fuerstenau South Dakota School of Mines and Technology Rapid City, South Dakota GS =4 Pieteay* |  | | Book (edition) | | Meredith (eds) Geology and minerals resources of West Africa J.B. Wright The inaccessible Earth G. C. Brown...example, the common black flint from the Chalk of the South of England). This condition is very common among...on to the equatorial plane by joining it to the 'south pole' (bottom point) of the enclosing sphere , or...between the vertical line joining the north and south ' poles' of the sphere and the pole to a particular...resolves light into components vibrating in a north-south direction. The two componen_ts interfere on leaving |  | | Book | | talc vug in 1997, is 1.7 cm long (Marty, 2004 ). AFRICA widely in Litchfield County, where good crystals...which they called the Bentley Lake Road occurrence, south of Bancroft. Sharp, flattened rhombohedral ilmenite...Girardville, itself 40 km northwest of Lac Saint-Jean in south-central Quebec, very large and sharp ilmenite Cl)...the town of Amsteg, subordinate drainages running south to Val Caverdiras; ilmenite rose-bearing clefts...western flank of the Tschingelstock, a few kilometers south of the uppermost Maderanertal and near the Brunnital |  | | Book | | images' of each other Left: Cerussite from South- West Africa, forming multiple intergrowths Far left:...platinum deposits of the famous Merensky Reef in South Africa occur in accumulations of this kind. Phenocrysts...been found in such areas as the chalk downs of southÂŹ ern and eastern England. Modem man still uses rocks...average figure. For instance, in the Witwatersrand goldfield of South Africa, gold exists in a concentration...the rich copper, lead and zinc deposits of South-West Africa has concentration factors of a thousand times |  | | Book | | intoa larger. (Cf. > Confluent.) matolite. > Pyrophyllite. siz, - Jean Louis (1807-73). Swiss zoologist...in the Precambrian of South Africa and Ghana. It is important in South Africa as the | source of the...the gold in the Witwatersrand goldfield, where the inâm dividual beds of banket are referred to as âreefsâ... A stratigraphic stage name for the top of the South African Middle > Karroo. Beaumont, Elie de (1798â1874)...la (1796-1855). English geologist whose work in south-west England was the first in the world to be governmentsupported |
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