The origin of the gold, the uranium and the PGEs in the basal conglomerate of the palaeoproterozoic Black Reef Formation of the Transvaal Supergroup in South Africa is currently debated due to its economic significance as a gold ore body.
The Journal of Geology. The source of gold in the ca. 2.66 Ga Black Reef Formation (BRF) has been investigated and constrained through petrographic, mineralogical, geochemical, and high-resolution three-dimensional reflection …
Geology; How we mine; How we process; Modernisation; About Gold Fields; Our vision and values; ... Our mining methods are very different to most South African deep level underground gold mines. ... Longhole stoping is the primary method …
South African Journal of Geology (1997) 100 (3): 213–222. Article history. First Online: 03 Mar 2017. Standard View; Cite. View This Citation; Add to Citation Manager; ... The Ventersdorp Contact Reef (VCR) is an Archaean conglomeratic gold placer, mined in the Carletonville, West Rand, and Klerksdorp goldfields of the Republic of South ...
Comment on pseudotachylite inthe South Boundary fault at the Cooke Shaft, Witwatersrand Basin, South Africa by P.W mambane et al., South African journal of geology 114.2, 109-120 Article June 2012
Department of Geology, Rand Afrikaans University, P.O. Box 524, Johannesburg 2000, RepUblic of South Africa Accepted 17 April 1990 Eersteling goldfield is situated in the Pietersburg granite-greenstone terrane within greenstones of the Archaean Eersteling Formation (Pietersburg Group). In the vicinity of the Eersteling Gold Mine, gold occurs in ...
Several examples of the Witwatersrand-type gold mineralisation having similar characteristics exist, including the Black Reef Formation in South Africa and the Huronian Supergroup in Canada (Mossman and Harron, 1983), both of which contain localised occurrences of economically significant gold concentrations. Although there are similarities ...
Within the eastern portion of the Carletonville gold field, the gold- and uranium-rich Carbon Leader reef of the Central Rand Group (Witwatersrand Supergroup) is truncated by an erosion channel.
The Black Reef experienced intense, post-depositional hydrothermal alteration by circulating aqueous and hydrocarbon fluids (oils) that deposited large volumes of native gold, uranium …
The Journal of The South African Institute of Mining and Metallurgy MAY/JUNE 1999 157 Introduction The approximately 2800 Ma old (Armstrong et al., 1991) Ventersdorp Contact Reef (VCR) is one of the major South African gold bearing orebodies being mined along the northern and northwestern edge of the Witwatersrand Basin (Figure 1).
The geology of portion of the Transvaal and Urange Free State, ... 1932 South Africa went off the gold standard, exploration boomed, old ... this borehole intersected a reef with erratic gold values. Exploration proceeded and the first gold mine in the Free State, ...
The Chuniespoort Group overlies the Klipriviersberg Group volcanic rocks, which in turn are underlain by the Central Rand Group that hosts the gold-bearing conglomerates (reefs), exploited by South Deep. Local geology. The reef horizons that are currently, or will be, exploited at South Deep include the Ventersdorp Contact Reef (VCR) and the ...
David R. Young, Morris J. Viljoen; The stratigraphy, sedimentology and gold distribution of the VS5/Beatrix composite reef at H. J. Joel gold mine, Orange Free State, Goldfield, Republic of South Africa.
Why autonomous mining? How? Quartz-rich Tough! Geological factors play an important role in the design of any autonomous narrow-reef miner in South Africa. Thank you. Questions?
DOI: 10.1016/J.EARSCIREV.2014.10.009 Corpus ID: 129003096; Gold accumulation in the Archaean Witwatersrand Basin, South Africa — evidence from concentrically laminated pyrite
The exceptional gold mineralisation in quartz pebble conglomerates of the Witwatersrand Basin is attributed to a combination of factors. These factors are linked to the co …
THE MINERALISATION AT ELANDSHOOGTE GOLD MINE, EASTERN TRANSVAAL, SOUTH AFRICA by M. HARLEY* and E.G. CHARLESWORTH (Economic Geology Research Unit, Department of Geology, University of the Witwatersrand, Private Bag 3, P.O. Wits 2050, Johannesburg, South Africa, and *Geological Survey of South Africa, Private Bag X112,
PDF | On Jan 1, 2006, G. Brandl and others published The geology of South Africa | Find, read and cite all the research you need on ResearchGate
PDF | On Jul 1, 2009, ROGER N. SCOON and others published Discovery and Geology of the Platinum Group Element Deposits of the Bushveld Complex, South Africa | Find, read and cite all the research ...
Sebastian H.J. Fuchs et al, Gold and uranium concentration by interaction of immiscible fluids (hydrothermal and hydrocarbon) in the Carbon Leader Reef, Witwatersrand Supergroup, South Africa, Precambrian Research (2017). DOI: 10.1016/j.precamres.2017.03.007
The study's main objective is to image the VCR (VCR, ca. ∼1.5–2 m thickness) at depths between 2400 and 3900 m below the surface near South Deep Gold mine in Fochville of the West Rand goldfield. Fochville is a town located in the Gauteng province of South Africa, known for its mining activities, particularly gold mining.
South Africa is famous for gold, with paleoplacer deposits of the Witwatersrand Basin having produced a large fraction of the world's gold. The country's first gold mines, however, were established 130 years ago in the Sabie-Pilgrims Rest Goldfield and produced gold from an entirely different type of deposit.
The Re-Os systematics of gold and sulfides from the Witwatersrand basin were utilized to determine whether the gold is detrital or was introduced by hydrothermal solutions from outside the basin ...
The origin of the gold and uranium ores of the Black Reef Formation, Transvaal Supergroup, South Africa S. Fuchsa,⁎,A.E.Williams-Jonesa, W.J. Przybylowiczb,c a Department of Earth and Planetary Science, McGill University, 3450 University Street, Montreal, QC H3A 0E8, Canada b Materials Research Department, iThemba LABS, National Research Foundation, P.O. Box …
We investigated the gold-bearing Black Reef Formation in the West ... Gold, South Africa, 3D seismics, Machine learning, 3D micro-X-ray computed ... Pretoria 0001, South Africa. 5Department of Geology, University of Johannesburg, P.O. Box 524 Auckland Park 2006, Gauteng, South Africa. 6Department of Geological Sciences, University of Cape Town,
The Chuniespoort Group overlies the Klipriviersberg Group volcanic rocks, which in turn are underlain by the Central Rand Group that hosts the gold-bearing conglomerates (reefs), …
South African Journal of Geology (2018) 121 (1): 1–22. ... palaeo-Proterozoic continental reconstructions and in addition opens up new exploration targets for Witwatersrand-type gold deposits in South Africa. ... Recycling of Paleoplacer Gold through Mechanical and Postdepositional Mobilization in the Neoarchean Black Reef Formation, South ...
The Central Rand Group was rather special, however, because heavy grains of gold were periodically deposited on the river beds, along with the gravel. This created the richest gold field on Earth, containing nearly half of the planet's gold. Later, these gold-bearing conglomerate rock layers (called reefs) would be mined with spectacular success.
The hosts to gold around the Witwatersrand Basin span over 400 my, through 14 km of stratigraphy in a variety of host rocks and in tectonic settings that include periods of rifting, thermal subsidence, foreland basin, …
The Journal of Geology. The source of gold in the ca. 2.66 Ga Black Reef Formation (BRF) has been investigated and constrained through petrographic, mineralogical, geochemical, and high-resolution three-dimensional reflection seismic data combined with drill core and underground geological mapping.
In the vicinity of the Eersteling Gold Mine, gold occurs in quartz-carbonate vein systems within coupled shear zones. This mineralization occurs within two settings: (1) in east-west-trending …