 | | Journal (article/letter/editorial) | | JanuaryFebruary: Rhodochrosite, NâChwaning mine, Hotazel, South Africa. Martin Zinn specimens, Erica and Harold Van...Huizing specimen, Jeff Scovil photo. May/June: Tourmaline on quartz, Cryo-Genie mine, San Diego County...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,...from the Carletonville Gold Mines, Witwatersrand Goldfield, South Africa, 390-99 Calcite, Colorado, 309; |  | | 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) | | 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...Qtz= quartzite, Rt = futile,Sud= sudoite, Tur = tourmaline. Po-PrlandPo-Kyarenotconsidered to beequilibrium |  | | 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 (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) | | 7cm Rhodochrosite Tourmaline with Cleavelandite N Chwaning I Mine, South Africa Stak Nala, Pakistan...Arrows point to a large mineralized pocket in the south end of the Auglaize quarryâs eastern highwall (2018)...southeast of the original quarry entrance (on the south side of the current access road), occasional exposures...contrast, current blasting, now mainly along the south wall, tends to The Mineralogical Record, volume...pocket was found near the overburden slope on the south side of the entry road near the right turn into |  | 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. |  | | 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 (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 (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; |  | | 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...the present-day erosion level in the Srednekan goldfield; however, a series of minor stocks may be projections...that deposit, located in the western sector of the South Tien Shan and central Kyzylkum, is hosted in the |  | | 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 | | 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 | | 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 |  | | 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 |  | | Journal (volume) | | ; > PAGE Abosso Gold Africa, Africa, Report German South-West German South-West African Railways...Hill Proprietary, Steel for Shells Broken Hill South Silver Report Broomassie Brown, Gilmour E... Prospecting...169 169 247 *344 Cowan, E. W {c.l.) Crovdon Goldfield Crushing Tests, Standardizing Cuban Iron Ore ... Expansion of Plant German South-West Africa German South- West Africa Giant Mines Arthur GifEord...Diamond Mining at Kimberley Diamond Situation in South Africa Gold Gold Gold Gold 130, 161 Helping the |  | | Book (edition) | | critical in the USA, but in the Republic of South Africa (RSA), a major source of all three, they are...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...the copper-bearing breccia pipes of Messina in South Africa (Jacobsen & McCarthy 1976). Mantos and pipes |  | | 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 | | 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 | | 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 | | images' of each other Left: Cerussite from South- West Africa, forming multiple intergrowths Far left:...like a column, relatively thick (as in beryl or tourmaline); platy : (as in mica); bladed: long and flat...commonly forms late and envelops other species; tourmaline and pyrite are further examples. Syngenetic inclusions...various minerals but is most common in quartz, tourmaline and chrysoberyl, whose chatoyant variety is called...sometimes have distinctive electrical properties. Tourmaline crystals display pyroÂŹ electricity, they become |  | | 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 (edition) | | Meredith (eds) Geology and minerals resources of West Africa J.B. Wright The inaccessible Earth G. C. Brown...regular fashion with different colour bands (as in tourmaline), or in patches within the mineral (as in fluorite)...example, the common black flint from the Chalk of the South of England). This condition is very common among...alo1andine, wolframite, ilmenite, hematite, chromite tourmaline, spinel group, monazite quartz, calcite, feldspars...minerals). Tourmaline is an example of a pyroelectric mineral. When a single-ended crystal of tourmaline is heated |  | | Journal (volume) | | Explosives on Rand 310 Africa, South, Educational Probleins in 1.58 Africa, South, Output of Metals and...227 Anaconda, Flotation Tests at 67 Anaconda in South America {m.d.) .... 228 Anaconda. Remodelled Concentrator...Shareholders Hill Proprietarv's Shell Steel . Hill South Hill South Developments Hill Strike Broomassie âą Studies...Diamond Market, Recovery in Diamond Mining in South Africa 303, 308 Draper and Goodchild {m.d.) .... 350...350 Diamond, Origin of 4 Diamond Production in South Africa 185 Diamonds, Export Tax on Diamonds in Rand |
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