South African Geology
South African Geology ... Geology gold grade grains granite Group haematite Hexagonal horizontal igneous important intersection intrusion iron Karoo Karoo Sequence kimberlite lavas layers LI's limestone lower magma magnetite material Merensky Reef metals metamorphism microscope mined mineralisation minerals occur optic orebody outcrop oxide ...
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The pre-Karoo geology of the southern portion of the Kaapvaal …
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 ...
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Discovery and Geology of the Platinum Group Element Deposits of …
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 ...
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Structural geometry and development of the Witwatersrand Basin, South
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 ...
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The origin of the gold and uranium ores of the Black …
The Black Reef experienced intense, post-depositional hydrothermal alteration by circulating aqueous and hydrocarbon fluids (oils) that deposited large volumes of native gold, uranium …
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Significance of granite-greenstone terranes in the …
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 ...
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The origin of the gold and uranium ores of the Black …
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 …
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Geology of the World's Major Gold Deposits and Provinces
The Mesoarchean Witwatersrand Basin in the central Kaapvaal craton, South Africa, has been the largest gold-producing province in history. ... Glen T. Nwaila, 2020. "Chapter 31: Geologic Evidence of Syngenetic Gold in the Witwatersrand Goldfields, South Africa", Geology of the World's Major Gold Deposits and Provinces, Richard H. Sillitoe ...
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Pyrite Zoning as a Record of Mineralization in the
The Archean metasedimentary succession of the Witwatersrand basin, South Africa, hosts the largest Au deposit in the world. Gold mineralization ... Department of Geology, University of Johannesburg, Auckland Park 2006, South Africa ... The presence of Au in detrital pyrite indicates an early introduction of Au in the Ventersdorp Contact Reef ...
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The Significance of Erosion Channels on Gold Metallogeny in …
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.
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The setting of mineralization in a portion of the …
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 …
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Gold mineralization within the Witwatersrand Basin, …
The world-class Witwatersrand gold deposit in South Africa has produced some 50 000 tonnes of gold since mining began in the late 1880s (Robb & Robb 1998).
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Geological Formation of South Africa
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.
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South African Journal of Geology
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
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The stratigraphy, sedimentology and gold distribution of 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.
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The Witwatersrand Basin and Its Gold Deposits
McCarthy TS (2006) The Witwatersrand Supergroup. In: Johnson MR, Anhaeusser CR, Thomas RJ (eds) The geology of South Africa. Geological Society of South Africa, Johannesburg, pp 155–186. Google Scholar Mellor ET …
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Geotechnical areas associated with the Ventersdorp …
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).
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Geological factors influencing the design of a narrow …
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?
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(PDF) The geology of South Africa
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
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Gold Fields South Deep Gold Mine
The origins of the gold within the reefs is best described by the modified placer theory – which means that the gold was deposited by a river system and by gold-bearing secondary fluids that percolated through the orebody after deposition.
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Factors responsible for Witwatersrand gold mineralisation
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 …
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A geometallurgical characterization study of the Crystalkop Reef …
Department of Geology, University of Johannesburg, P.O. Box 524, Auckland Park, 2006, South Africa
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Significance of granite-greenstone terranes in the formation …
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.
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The Ventersdorp contact reef; final phase of the …
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 ...
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Gold accumulation in the Archaean Witwatersrand Basin, South Africa …
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
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Gold Fields
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 ...
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Seismic imaging of deep‐seated gold deposit and host rocks …
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.
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How we mine
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 …
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The formation of gold deposits in South Africa
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
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ECONOMIC GEOLOGY RESEARCH UNIT
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,
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