 | Guy, B. M., Ono, S., Gutzmer, J., Lin, Y., Beukes, N. J. (2014) Sulfur sources of sedimentary “buckshot” pyrite in the Auriferous Conglomerates of the Mesoarchean Witwatersrand and Ventersdorp Supergroups, Kaapvaal Craton, South Africa. Mineralium Deposita, 49 (6) 751-775 doi:10.1007/s00126-014-0518-3 | Journal (article/letter/editorial) | | ARTICLE Sulfur sources of sedimentary “buckshot” pyrite in the Auriferous Conglomerates of the Mesoarchean...and Ventersdorp Supergroups, Kaapvaal Craton, South Africa B. M. Guy & S. Ono & J. Gutzmer & Y. Lin & N...Abstract Large rounded pyrite grains (>1 mm), commonly referred to as “buckshot” pyrite grains, are a characteristic...and Ventersdorp supergroups, Kaapvaal Craton, South Africa. Detailed petrographic analyses of the reefs...of the buckshot pyrite grains are of reworked sedimentary origin, i.e., that the pyrite grains originally |  | | Journal (article/letter/editorial) | | Genmin, P.O. Box 61820, Marshalltown, 2107, South Africa (Received November 4, 1992; revised version...oidmuscovite-chlorite-quartz-tourmaline-rutile-pyrite is found in most gold fields. Kaolinite, paragonite...biotite, pyrrhotite and arsenopyrite have more local distribution. Pelites ("shales"), quartzites, meta-conglomerates...equilibrium with pyrophyllite-muscovite-quartz-pyrite + paragonite are inferred during metamorphism,...Dome, Johannesburg, and other important towns (Welkom, W; Klerksdorp, K; Carletonville, C; Randfontein |  | Lippmann, J., Stute, M., Torgersen, T., Moser, D.P., Hall, J.A., Lin, L., Borcsik, M., Bellamy, R.E.S., Onstott, T.C. (2003) Dating ultra-deep mine waters with noble gases and 36Cl, Witwatersrand Basin, South Africa. Geochimica et Cosmochimica Acta, 67 (23) 4597-4619 doi:10.1016/s0016-7037(03)00414-9 | Journal (article/letter/editorial) | | 1016/S0016-7037(03)00414-9 Dating ultra-deep mine waters with noble gases and South Africa 36 Cl, Witwatersrand Basin...08544, USA 6 Geology Dept Beatrix Mine, P O Box 2823, Welkom, 9460 South Africa (Received May 15, 2002;...below the surface) in the Witwatersrand Basin, South Africa, were investigated to quantify the dynamics...research areas is the ultra deep gold mines in South Africa, the deepest continental sites on Earth that...lies within the Archaean Kaapvaal Craton of South Africa (Fig. 1a and b) and formed episodically between |  | | Journal (article/letter/editorial) | | CHLORITE-RICH COMMUNICATIONS NODULES IN THE BEATRIX REEF, WITWATERSRAND G. NEIL PHILLIPS AND Guo-YI...Thisstudy examines the chlorite-rich nodules of the Beatrix reef The Witwatersrandreefs are characterizedby...chlorite-richnodules,quartzcommonly the Beatrixreef at Welkom, for example,they are formstiny roundinclusions...the Fe-rich minerals of hematite, al- found at Beatrix. The chlorite-rich nodules are con- ture. Further...the Beatrixmineandstratigraphic positionof the Beatrix reef (simplifiedfromTweedie,1986). The DominionGroup(below) |  | | Journal (article/letter/editorial) | | hat ReflectProterozoicWeathering, Welkom Gold Field, South Africa W. E. L. MINTER, Departmentof Geology...of erosionin the Witwatersrand succession in the Welkom gold field. Fluvial and debris flow sedimentson...uraniummineralizationis associated with detrital pyrite and gold accumulations.This mineralizationoccursas...same;all three varietiesof pyrite showdetrital rounding,includingsecondary pyrite whichoriginallyformedin...of arthe earliest cratonic sediments in southern Africa enites,with minor gravelfacies,andwere deposited |  | | Journal (article/letter/editorial) | | Private Bag 3, PO Wits 2050, Johannesburg, South Africa Present address: Rock Engineering Department...SRK Consulting, PO Box 55291, Northlands 2116, South Africa Wolf Uwe Reimold Impact Cratering Research... Private Bag 3, PO Wits 2050, Johannesburg, South Africa Corresponding author, Fax: +27 (11) 339 1697;...99775-7320, USA © 2003 Geological Society of South Africa ABSTRACT Tectonites from ~2.7-Ga-old Platberg...in H.J. Joel and Harmony gold mines (southern Free State Goldfield) were dated by the 40Ar-39Ar step-heating |  | | Book | | J. H. L. Voncken Geology of Coal Deposits of South Limburg, The Netherlands Including Adjacent German...academic such as: • • • • • timely reports of state-of-the art analytical techniques bridges between... J. H. L. Voncken Geology of Coal Deposits of South Limburg, The Netherlands Including Adjacent German...relevant protective laws and regulations and therefore free for general use. The publisher, the authors and...firer/blaster in the Dutch coal mine Oranje Nassau Mine II. This mine was located in the village of Schaesberg |  | | Journal (article/letter/editorial) | | processes, temperature of the Earth’s surface, and state and composition of primary atmosphere at early stages...gneisses (“gray gneisses”) detected, though in local sectors, virtually in all continents and ancient...Rand, (V) Carletonville, (VI) Klerksdorp, (VII) Welkom. (1−12) Major reefs developed in the western fields:...(7) Vaal, (8) Eldorado, (9) Andenk, (10) Beisa-Beatrix, (11) Basal (Steyn), (12) Commonage; (2−4) rock...In this connection, it is worth mentioning that South African geologists (Robb and Robb, 1998; Frimmel |  | | Journal (article/letter/editorial) | | margin of the Archaean Witwatersrand Basin of South Africa associated with regional greenschist facies...in producing gold deposits were the widespread local concentrations of C and Fe on unconformity surfaces...with assemblages that included chlorite–calcite–pyrite, and a regional metamorphic event of high geothermal...Sciences, University of Stellenbosch, Stellenbosch, South Africa 2 *Corresponding author, email neil@phillipsgold...model. Keywords: Gold, Witwatersrand, Archaean, South Africa, Metamorphism, Devolatilisation, Replacement |  | | Journal (article/letter/editorial) | | photosynthesizers at around 3.0 Ga, the first ‘whiffs’ of free oxygen produced by photosynthesis under an overall...University of Cape Town, Rondebosch, Cape Town 7701, South Africa e-mail: hartwig.frimmel@uni-wuerzburg.de Q....mineralization was indeed synsedimentary. Limited local remobilization of gold and other ore constituents...compared with average continental crust, average South African peridotite xenolith and Allende meteorite...Ga are rich in both detrital and synsedimentary pyrite as well as detrital uraninite, whereas those younger |  | | Journal (article/letter/editorial) | | Palaeoproterozoic marine shales of the Kaapvaal Craton, South Africa Glen T. Nwaila 1,2 & Hartwig E. Frimmel 2...granitoid-greenstone-dominated hinterland. Although sedimentary pyrite incorporated gold from synsedimentary to early...suggest that in addition to contributions from pyrite, some colloidal gold was attached to clay-sized...Witwatersrand, Private Bag 3, Johannesburg 2050, South Africa 2 Bavarian Georesources Centre (BGC), Institute...Sciences, University of Cape Town, Rondebosch 7700, South Africa and PGE content in modern seawater are extremely |  | Morishita, Yuichi, Hammond, Napoleon Q., Momii, Kazunori, Konagaya, Rimi, Sano, Yuji, Takahata, Naoto, Ueno, Hirotomo (2019) Invisible Gold in Pyrite from Epithermal, Banded-Iron-Formation-Hosted, and Sedimentary Gold Deposits: Evidence of Hydrothermal Influence. Minerals, 9 (7) 447 doi:10.3390/min9070447 | Journal (article/letter/editorial) | | minerals Article Invisible Gold in Pyrite from Epithermal, Banded-Iron-Formation-Hosted, and Sedimentary...of Limpopo, Private Bag X1106, Sovenga 0727, South Africa Atmosphere and Ocean Research Institute, University...Abstract: “Invisible gold” in pyrite is defined as an Au solid solution of the pyrite lattice, sub-microscopic...sub-microscopic Au nanoparticles (NPs) in the pyrite, or other chemisorption complexes of Au. Because the relationship...relationship between the Au and As concentrations in pyrite could indicate the genesis of the deposit, the purpose |  | | Journal (article/letter/editorial) | | University of the Witwatersrand, Wits, 2050, South Africa Abstract. Chloritoid and pyrophyllite occur...Koen, 1975; Palmer, 1986; Phillips, 1987). In the Welkom goldfield, chloritoid- andor pyrophyllite-bearing...interpreted to be diamictites, in the west of ERPM gold mine (D. Martin, personal communication, 1986). Mature...reefs as matrix to quartz pebbles, associated with pyrite and muscovite. Immature conglomerates Idioblastic...metasediments (e.g. Consolidated Modderfontein gold mine); minor pyrophyllite occurs near the margins of |  | Sherwood Lollar, B., Voglesonger, K., Lin, L.-H., Lacrampe-Couloume, G., Telling, J., Abrajano, T.A., Onstott, T.C., Pratt, L.M. (2007) Hydrogeologic Controls on Episodic H2 Release from Precambrian Fractured Rocks—Energy for Deep Subsurface Life on Earth and Mars. Astrobiology, 7 (6) 971-986 doi:10.1089/ast.2006.0096 | Journal (article/letter/editorial) | | range and H2 levels up to 9–58% by volume in the free gas phase are reported for groundwaters at sites...for groundwaters from the Witwatersrand Basin, South Africa, these findings indicate that deep Precambrian...signatures of H2 gas from Canada, Finland, and South Africa are consistent with a range of H2-producing...at 2–3 km depth in the Witwatersrand Basin of South Africa, Lin et al. (2006b) and Sherwood Lollar et al...previous studies of sites in Canada, Finland, and South Africa, the current paper shows that, worldwide, Precambrian |  | | Journal (article/letter/editorial) | | University of the Witwatersrand, Johannesburg, South Africa With 7 Figures Received August 13, 1998; revised...Group shales from three boreholes to the east and south of the Vredefort Dome is lower greenschist facies...has been replaced by assemblages consisting of pyrite ÷ quartz ± chlorite + stilpnomelane ± calcite ±...availability of exposure, as almost all of the central and south-eastern portions of the basin are covered by post-Witwatersrand...the deposition of the 2.6-2.2Ga Transvaal 126 South G. Stevens and R. F. Preston , Transvaal Supercjroup |  | | Book | | I hope that this volume provides both a useful state-of-the-art review and an insight into the scientific...Manchester in 1973 (Ph.D.) and was then employed as a mine and exploration geologist by Falcon Mines Ltd in...and applied research in collaboration with the local mining industry. In 1984 he moved to the University...consultant on gold mining and exploration in Europe, Africa, and the Middle East. Professor D.1. Groves Key...geochemical exploration programmes, in France and North Africa, where he has gained considerable experience in |  | | Report (issue) | | Great Oxidation Event (GOE). The availability of free oxygen would have had a strong effect on the (bio)geochemical...elements that exist in more than one oxidation state in nature. Of the major rock-forming elements, only...famous Mesoarchean Witwatersrand Supergroup in South Africa that contains Earth’s largest gold-uranium deposits...Minter shows that the sedimentary setting of gold, pyrite, and uraninite favors a detrital origin and their...and Ohmoto argue against a paleoplacer origin for pyrite in the slightly younger Paleoproterozoic Huronian |  | | Journal (article/letter/editorial) | | Kinsley Vol. 101, No. 5, 2016 Equation of state of pyrite to 80 GPa and 2400 K— Elizabeth C. Thompson...mineralization and host rocks of the Howard’s Pass district, Yukon, Canada— Michael G. Gadd, Daniel Layton-Matthews...Mineral resources of high-tech metals in Russia: State of the art and outlook—N.S. Bortnikov, A.V. Volkov...Characterization of rectorite from the Beatrix gold mine in South Africa—Maria T. Atanasova, Anastasia Vyalikh...Holwell, and Andrew C. Kerr 229 383 JOURNAL OF SOUTH AMERICAN EARTH SCIENCE Vol. 68, 2016 Metallogenetic |  | | Report (issue) | | the expected decline in South African production Gold mining in South Africa Underground mining Surface...Surface mining Gold milling in South Africa Low-grade milling Refining and transportation United States ... 8 Background Impact of the Hemlo district upon future annual Canadian gold output Total annual production...availability Annual gold production potential Hemlo gold district 20 22 industry profitability Annual production...annual production through 2000 .... Republic of South Africa Historical perspective Resource overview, 1984 |  | | Journal (issue) | | with popular • Coordinate lon/lat, UTM, State Plane, local, custom tools such as maps,systems: logs...through the Online Helptypes Files de, UTM, State Plane, local, custom • •Numerous gridding and solid modeling... Other Tools • Time-based animations Download FREE Trial at www.RockWare.com models arth and posters...Dourlat 25 Geothermal energy developments in the district heating of Szeged M. Osvald, J. Szanyi, T. Medgyes...Willis-Richards & A.J.S.C. Pereira 34 Geothermal use of mine water L.M. Lara, I. G. Colinas, M.T Mallada, A.E |  | | Book | | 447 467 491 Company Index 503 Tables: World Mine Production of Gold, Silver and Base Metals 5A2...Mining OFFICES: 5011 Meadowood Way Paradise Peak Mine Suite 300 (100% FMC Gold) * Sales Reno, Nevada...Elko, Nevada (303) 292-7500 Royal Mountain King Mine (100% FMC Gold) Copperopolis, California Beartrack... Gold's price fell to levels at which half the South African gold mines, probably half those in Australia...have been widespread, especially in the highcost South African mines. Some say a structural change is taking |  | | Report (issue) | | BELARUS BELGIUM BELIZE BENIN BOLIVIA, PLURINATIONAL STATE OF BOSNIA AND HERZEGOVINA BOTSWANA BRAZIL BRUNEI...SEYCHELLES SIERRA LEONE SINGAPORE SLOVAKIA SLOVENIA SOUTH AFRICA SPAIN SRI LANKA SUDAN SWAZILAND SWEDEN SWITZERLAND.........................................59 3.3.4. Mine data .............................................Kazakhstan Canada Russian Federation Namibia South Africa Niger Brazil China Greenland (Denmark) Ukraine...Rössing in Namibia and the closure of the Kayelekera mine in Malawi as a result of low prevailing uranium |  | | Journal (issue) | | Patrick and lean Pierre have been given two years free membership of GCG. GCG was also one of the sponsors...50,000 specimens, with particular strengths in local Pliocene and Pleistocene molluscs and mammals, and...successful year for the museum - it also won the South West Museum of the Year and received a special design...innovative and ambitious festival taking place in South Kensington in September 2000. Opening on Wednesday...of Science is leading the great institutions of South Kensington Imperial College, the Natural History |  | | Report (chapter) | | Otago on July 26, 2015 Chemical containment of mine waste R. J. B O W E L L , 1 K. P. W I L L I A M...problems associated with mineral processing and mine waste are: 9 poor water quality, through the release...developing effective processes for the treatment of mine waste. Presently there are a variety of physical...quality effluent throughout the active life of the mine and to provide sufficient safeguards against pollution...waste disposal and mine closure plans within the feasibility study of a new mine before any site development |  | | Book (volume) | | British Columbia California Colorado Connecticut District of Columbia Delaware Department Florida Georgia...Wis. Wyo. Yukon 3 New Mexico Nova Scotia New South Wales Northern Territory Northwest Territories New...Pennsylvania Queensland Rhode Island South Australia South Carolina South Dakota Saskatchewan Tasmania Tennessee...(Wales) Aberdeen (Scotland) Aberdeen (South Africa : District) Aberdeen Angus cattle Aberdeenshire (Scotland)...aka 294.382 4 Abhidharmapitaka T2--669 45 Abia State (Nigeria) T2--666 8 Abidjan (Ivory Coast) 153.9 |
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