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Witwatersrand Gold Deposits - Mineral Processing

2018-2-13  The Witwatersrand deposits have produced almost 40% of all the gold produced on earth since beginning of time over 1.5 billion with a B ounces that’s the equivalent of 305 million ounce deposits if there’s one area of agreement on the Witwatersrand gold deposits is that they are truly world class solid gold

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Witwatersrand gold deposits formed by volcanic rain ...

2015-2-2  The Witwatersrand gold deposit is the largest in the world. Thermodynamic calculations show that such rich accumulations of gold could be linked to abundant volcanism, primitive life and the ...

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Witwatersrand gold deposits (pdf) Paperity

Even rare structures such as those formed by gold being folded around mineral inclusions can be observed (Figure 3). However, most of the gold particles in the Witwatersrand deposits display micro-textures which indicate short transport distances of a range from 5 to 30 km (3). Depending on the original shape and size of a particle the initial ...

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The Witwatersrand Basin and Its Gold Deposits SpringerLink

2019-2-21  Hayward CL, Reimold WU, Gibson RL, Robb LJ (2005) Gold mineralization within the Witwatersrand basin, South Africa: evidence for a modified placer origin, and the role of the Vredefort impact event. In: MacDonald I, Boyce AJ, Butler IB, Herrington RJ, Polya DA (eds) Mineral deposits

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Witwatersrand Gold Fields: Geology, Genesis, and ...

2000-1-1  THIS Gold in 2000volume is organized around a classification of hypogene gold deposits that emphasizes their tectonic setting and relative time of formation compared to their host rocks and other gold deposit types (e.g., Sawkins, 1972, 1990; Groves et al., 1998; Kerrich et al., 2000).The temporal division of orogenic gold deposits into Archean, Proterozoic, and Phanerozoic follows closely the ...

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The Witwatersrand Basin and Its Gold Deposits: Methods

The Mesoarchean Witwatersrand Basin in South Africa is, in many respects, a world-class repository of gold ore. More than one third of gold that has been ever mined, approximately 53,000 tons, is ...

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Quartz-Pebble-Conglomerate Gold Deposits

2018-5-14  another quartz-pebble-conglomerate gold deposit as rich as the Witwatersrand deposits remains highly unlikely because of the confluence of features necessary to create such a large endowment of gold. However, some smaller occur-rences do exist in the United States. Pyritic paleoplacers of sub-ore grade are found in the Deep Lake Group and

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The geochemistry of Witwatersrand-type gold deposits

Simplifying solutions to the metallogeny of Witwatersrand-type gold that do not take into account the diverse types of gold in the deposits, are unrealistic. Precipitated gold associated with kerogen is only one of four main types of Witwatesrand gold, but it may be the major one. Our proposed model to account for this gold involves the ...

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Gold accumulation in the Archaean Witwatersrand Basin ...

2015-1-1  1. Introduction. The origin of Au –U deposits in the Archaean Witwatersrand Basin of South Africa is the subject of longstanding discussion.Because of the close spatial association of pyrite with Au and U in the mineralised conglomerates, the origin of pyrite is a central aspect in all genetic hypotheses of Witwatersrand mineralisation, in both primary “placer” models (Robb and Meyer ...

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Witwatersrand gold deposits formed by volcanic rain ...

2015-2-2  The Witwatersrand gold deposit is the largest in the world. Thermodynamic calculations show that such rich accumulations of gold could be linked to abundant volcanism, primitive life and the ...

Get Price

Witwatersrand gold deposits (pdf) Paperity

Even rare structures such as those formed by gold being folded around mineral inclusions can be observed (Figure 3). However, most of the gold particles in the Witwatersrand deposits display micro-textures which indicate short transport distances of a range from 5 to 30 km (3). Depending on the original shape and size of a particle the initial ...

Get Price

The Witwatersrand Basin and Its Gold Deposits: Methods

The Mesoarchean Witwatersrand Basin in South Africa is, in many respects, a world-class repository of gold ore. More than one third of gold that has been ever mined, approximately 53,000 tons, is ...

Get Price

Scientists Discover That 40 Percent of the World's Gold is ...

2021-8-30  The new results confirm that the Witwatersrand gold deposits are "placer" deposits that millions of years ago, ancient rivers carried gold particles, along with sand and silt, into the Witerwatersrand basin then a great lake possibly from granite mountains to the north and southwest. Over time and under pressure, the gold-bearing sediments ...

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Gold Deposits Goldfo

Witwatersrand Gold Deposits. A special type of gold deposit is the Witwatersrand goldmine in South Africa, which is by far the biggest gold field in the world. About 40,000 tonnes of gold have already been extracted from it. The Witwatersrand goldmine is identified as a so-called mixed type of primary and secondary gold deposits.

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Quartz-Pebble-Conglomerate Gold Deposits

2018-5-14  another quartz-pebble-conglomerate gold deposit as rich as the Witwatersrand deposits remains highly unlikely because of the confluence of features necessary to create such a large endowment of gold. However, some smaller occur-rences do exist in the United States. Pyritic paleoplacers of sub-ore grade are found in the Deep Lake Group and

Get Price

The geochemistry of Witwatersrand-type gold deposits

Simplifying solutions to the metallogeny of Witwatersrand-type gold that do not take into account the diverse types of gold in the deposits, are unrealistic. Precipitated gold associated with kerogen is only one of four main types of Witwatesrand gold, but it may be the major one. Our proposed model to account for this gold involves the ...

Get Price

Cobalt, nickel, and gold in pyrite from primary gold ...

from gold ores in the Murchison and Pietersburg greenstone belts which are greater than 10. The latter deposits are possibly genetically related to volcanogenic massive sulphide deposits. Allogenic pyrites from conglomerates in the Moodies Group, Pongola Supergroup, Uitkyk Formation, and Witwatersrand

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The Sources of Witwatersrand Gold and Uranium: A

1991-1-1  The Witwatersrand basin hosts the most productive gold fields yet mined anywhere in the world. From 1886 to the end of 1987, a total of 41,700 metric tons (1.340 billion oz) of gold and 146,000 metric tons of uranium oxide was recovered from mineralized quartz-pebble conglomerates, quartzites, and thin layers of kerogen deposited between 2750 and 3100 Ma on braid deltas and braid plains ...

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Gold accumulation in the Archaean Witwatersrand Basin ...

2015-1-1  1. Introduction. The origin of Au –U deposits in the Archaean Witwatersrand Basin of South Africa is the subject of longstanding discussion.Because of the close spatial association of pyrite with Au and U in the mineralised conglomerates, the origin of pyrite is a central aspect in all genetic hypotheses of Witwatersrand mineralisation, in both primary “placer” models (Robb and Meyer ...

Get Price

Witwatersrand gold deposits formed by volcanic rain ...

2015-2-2  The Witwatersrand gold deposit is the largest in the world. Thermodynamic calculations show that such rich accumulations of gold could be linked to abundant volcanism, primitive life and the ...

Get Price

Witwatersrand gold deposits SpringerLink

Studies of the morphology and other properties of the gold particles in the fossil placer gold deposits of the Witwatersrand provide fascinating glimpses of the conditions under which they were formed. In particular they indicate that in some areas primitive plant life on the deltas on which the gold was deposited acted not only like the legendary golden fleece in concentrating fine gold ...

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The Witwatersrand Basin and Its Gold Deposits: Methods

The Mesoarchean Witwatersrand Basin in South Africa is, in many respects, a world-class repository of gold ore. More than one third of gold that has been ever mined, approximately 53,000 tons, is ...

Get Price

Gold mining on the Witwatersrand (Journal Article)

Gold mining in the reef gold deposits of Witwatersrand takes place today at depths varying from the surface (outcrop workings) to more than 3000 m below the surface. The deepest air shaft reaches 2400 m; deeper levels are served via secondary blind shafts.

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Scientists Discover That 40 Percent of the World's Gold is ...

2021-8-30  The new results confirm that the Witwatersrand gold deposits are "placer" deposits that millions of years ago, ancient rivers carried gold particles, along with sand and silt, into the Witerwatersrand basin then a great lake possibly from granite mountains to the north and southwest. Over time and under pressure, the gold-bearing sediments ...

Get Price

The formation of gold deposits in South Africa

2017-4-20  In 1852, the English prospector J.H. Davis discovered the first gold in the Witwatersrand, leading to the South African gold rush and the discovery of much more gold deposits within the basin.

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The Formation of Gold deposits in South Africa

2021-8-31  In 1852, the English prospector J.H. Davis discovered the first gold in the Witwatersrand, leading to the South African gold rush and the discovery of much more gold deposits within the basin. Although the Witwatersrand has been subject for decades of research, the genesis of gold

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Cobalt, nickel, and gold in pyrite from primary gold ...

from gold ores in the Murchison and Pietersburg greenstone belts which are greater than 10. The latter deposits are possibly genetically related to volcanogenic massive sulphide deposits. Allogenic pyrites from conglomerates in the Moodies Group, Pongola Supergroup, Uitkyk Formation, and Witwatersrand Supergroup

Get Price

(PDF) A Review of the Witwatersrand Basin - The World’s ...

2016-6-1  The world's greatest deposit of gold is hosted by the Archaean Witwatersrand sedimentary basin, situated in the central portion of the Kaapvaal Craton of South Africa. The geological setting of ...

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Hydrothermal alteration and gold mineralization in the ...

2020-10-8  Witwatersrand •Vast goldfields, •enveloped by even larger hydrothermal systems, •to which gold mineralisation has been related •. aring Horwood (1917) “Gold deposits of the Rand” Giffin, London •Phillips Law (1980’s-) •Leeds Group, Anglogold (1990’s-) Barnicoat others,1997

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