 | | Journal (article/letter/editorial) | | Hotazel, South Africa. Martin Zinn specimens, Erica and Harold Van Pelt photo. March/April: Calcite, Guiyang...EricaVan Pelt photo. July/August: Amethyst and calcite, Artigas, Uruguay. Rock Currier specimen, Jeff...âAlaskaite,â Colorado, 307 Albite, California, 160; Witwatersrand, 395 Allanite-(Ce), California, 162 Allophane...Colorado, 308; New Mexico, 385; Utah, 244; Witwatersrand, 395 Barite from the Cedar Creek Anticline,...Carletonville Gold Mines, Witwatersrand Goldfield, South Africa, 390-99 Calcite, Colorado, 309; Jinlong |  | | 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 |  | | Journal (article/letter/editorial) | | Johannesburg PO Box 524, Auckland Park 2006 Gauteng, South Africa brucec@uj.ac.za All photos by author Figure...photographing some fine mineral specimens from various South African mineral collections. These include private...Namibia and the Kalahari manganese field in South Africa are still producing mineral specimens. The NâChwaning...Riemvasmaak in the Northern Cape Province of South Africa; Balayer is also mining for fluorite at this...fluorite mine located northeast of Pretoria, South Africa (see Cairncross et al. 2008). In fact, goethite |  | | Journal (article/letter/editorial) | | Worldâs Greatest Gold Deposit: The Witwatersrand Goldfield, South Africa Bruce Cairncross [11:40 to Noon]...and Ontario, as well as such unlikely places as South Carolina and Papua New Guinea. Although not all...symposium will be reflected by speakers from South Africa and Europe as well as the United States, with...countries with fewer than 10 each. Half of the 153 South American specimens are from Chile (42) and Colombia...Australia and New Zealand (56) exceed those from Africa (38). The majority of the systematic suites are |  | | 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...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...boundaries, then in shear zones, and into the Witwatersrand Supergroup via the major thrust faults adjacent |  | | Journal (article/letter/editorial) | | Geoscience, Private Bag X112, Pretoria, 0001, South Africa, e-mail: henkc@geoscience.org.za, pwade@geoscience...2520, South Africa, e-mail: frank.winde@nwu.ac.za © 2006 December Geological Society of South Africa ABSTRACT...Between 1991 and 1993, the Geological Survey of South Africa (now the Council for Geoscience) commissioned...high-resolution airborne geophysical surveys in the Witwatersrand area. Coetzee (1995; 1996) describes the mining...established spatial relationships between contamination SOUTH AFRICAN JOURNAL OF GEOLOGY, 2006, VOLUME 109 PAGE |  | | 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...have grainedehlorite,muscovite (Fig.3B), rutfie,calcite(in the tweentypesis common. to the aggregates. |  | | 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 | | | Book | | Struik Nature (an imprint of Penguin Random House South Africa (Pty) Ltd) 1953/000441/07 Reg. No. 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...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 (issue) | | Twenty-three, Number Three Âź 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) | | .... 497 COVER: FLUORITE phantom crystal with calcite crystals on matrix, 5.5 cm, from the Auglaize quarry...Tourmaline with Cleavelandite N Chwaning I Mine, South Africa Stak Nala, Pakistan 10.0 x 6.0 x 3.6cm 4.4 x...popular mineral collecting site for over 60 years. Calcite, sphalerite, and especially multicolored, iridescent...Figure 9 and 49 (2) Calcite Figure 9 and 29 (3) Exceptional phantom fluorite (4) Calcite with marcasite (5)...iridescent, Figure 34 (12) Phantom fluorite (13) Calcite (misfire area) (14) Exceptional iridescent fluorite |  | | 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) | | 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 |  | | Journal (article/letter/editorial) | | SEDIMENTARY ROCKS OF THE MESOARCHEAN WITWATERSRAND SUPERGROUP, SOUTH AFRICA B.M. GUY AND N.J. BEUKES Paleoproterozoic...University of Johannesburg, Auckland Park, 2006, South Africa e-mail: bradguy5@gmail.com; nbeukes@uj.ac.za...University of Johannesburg, Auckland Park, 2006, South Africa Department of Mineralogy, Technische Universitat...tu-freiberg.de © 2010 June Geological Society of South Africa ABSTRACT A petrographic and mineral chemical...non-conglomeratic sedimentary rocks of the 3.0 to 2.8 Ga Witwatersrand Supergroup. Detailed petrographic analyses revealed |  | | Journal (article/letter/editorial) | | was based on the following reasoning. The first goldfield comprises unique placers in the Shturmovy, Chek-Cheka...mineralization. The Utinaya RiverâBasugunâya goldfield is less productive; nevertheless, a few tons of...is accompanied by an alluvial gold placer. The goldfield includes intrusive bodies that cut through the...often having ladder morphology. Albite, chlorite, calcite, and ore mineralization (gold, arsenopyrite, pyrite...the present-day erosion level in the Srednekan goldfield; however, a series of minor stocks may be projections |  | | Journal (article/letter/editorial) | | sphalerite peloids cemented by micrite and/or sparry calcite may be distinguished. The Calcare blendoso and...karst sediments and collapse breccias, cemented by calcite, quartz and barite and to a minor degree with sulfides...The geology of the Rosas -Terreseo area, ~ulcls, South Sardinia. Leidse Geol. Med. 35:117-208 (1966) Salvadori...the centenary of the discovery of the Witwatersrand Goldfield. Persons wishing to attend the congress...Box 395, Pretoria, Republic of South Africa 0001 International South European Symposium on Exploration |  | | 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) | | geology of a portion of southern Damaraland, South West Africa, with particular reference to the petrogenesis...southeast Georgia and adjacent parts of Florida and South Carolina. Washington, B.C. ; U.S. G.P.O. ; Denver...G(530) DBlj Bd.35 CALCITE CRYSTALS. Nature and origen of micro-rhombic calcite and associated microporosity...University. P(232) C535f CLIMATig GEOMORPHOLOGY AFRICA. Beitrage zur Geomorphologie Afrikas. G(530) Z33...characteristics of the Edisto River system, South Carolina. Columbia, S.C. : South Carolina Water Resources Commission |  | | 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 | | 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 |  | | 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 |  | | Journal (article/letter/editorial) | | Department of Geology, University of Witwatersrand, Johannesburg 2001 (South Africa) (Received June 24, 1986; revised...continental crust. Interestingly, the giant Witwatersrand goldfield formed at about the same time. Introduction...deposits. In 1984, he joined the University of the Witwatersrand as a senior lecturer in geochemistry, where...interest has been metamorphic processes within the Witwatersrand Basin. He is currently a consultant to the mining...geographically discrete greenstone belts occur in southern Africa (e.g. Foster, 1985) and Canada with, fbr example |  | | Book | | CONGLOMERATES OF THE WITWATERSRAND.......... F. H. Hatch.. Development of the Witwatersrand .....°-......-..........0-+.0+-Stratigraphy of the Witwatersrand: The Witwatersrand system............... âga sida ee...ascitic 2 < sic suis dive eels ne « ects North-South No. 7 Vein; 90-Ft. Level; 12 Inches Wide; Kerr Lake...se)sv30 4 obs) cis saree Ideal Section of Bendigo Goldfield, Showing the Three Main Lodes..... Secon smo niCwan...Opposite Section by F. H. Hatch Across the Witwatersrand Beds.............. Double Outerop of the Main |  | | Book | | Platinum; qualities Africa. British and distribution. Ural Mountains. South Columbia. Genesis of Platinum...Pneumatolytic Rossland, South Australia, and Braden Mine, Chile. Lodes of Cornwall. Pipe Lodes South Australia and...and South Africa. Disseminations. Pyritic Masses Spain and Mt. Lyell. Secondary Ores Secondary Enrichments...< Almaden Mines: Price. 1 Mi". New the South Africa. Idria, Califor: of Ores with Kainoxoic Formation...Pneumatolytic *57 Origin. Gemsâ Diamond, South Africa Asbestos. Monazite. The Brazil; theories of |  | | Book (edition) | | critical in the USA, but in the Republic of South Africa (RSA), a major source of all three, they are...materials are frequently less efficient (e.g. calcite for kaolinite as a cheaper paper filler) or more...and uranium is an important by-product of many South African gold ores. Among industrial minerals the...to extract uranium from the crushed are, but if calcite is present, there will be excessive acid consumption...develop the 450+ Mt eu-U-Au Roxby Downs Project in South Australia, Western Mining Corporation and British |
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Loraine Mine, Welkom, Matjhabeng Local Municipality, Lejweleputswa District Municipality, Free State, South Africa