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The formation of gold deposits in South Africa |

At a first glance, the Witwatersrand basin, the largest known gold resource on our planet, is not automatically related to ocean research. However, in its 3 billion years old geological history, the Witwatersrand basin in South Africa has been covered by seawater, but experienced also episodes of drying out, flooding and erosion by rivers and the repeated coverage by seawater.

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The formation of gold deposits in South Africa |

At a first glance, the Witwatersrand basin, the largest known gold resource on our planet, is not automatically related to ocean research. However, in its 3 billion years old geological history, the Witwatersrand basin in South Africa has been covered by seawater, but experienced also episodes of drying out, flooding and erosion by rivers and the repeated coverage by seawater.

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GSSA – Geological Society of South Africa

The Geological Society of South Africa (GSSA) is a not-for-profit Scientific and Professional Society for earth scientists first established in 1895. Our objective is to promote and advance the earth sciences, including the study of the earth sciences,

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The impact of gold mining on the Witwatersrand

15.06.2012· The gold economy in South Africa has been mainly an extracting enterprise since the British government took over the rule of South Africa after the Anglo-Boer War and this is still the case today. Mining costs are kept artificially low by the mines by deflecting responsibility for their environmental and health impacts to the state and third parties in order to maximise profits ( Adler et al

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Vaal Reefs Mine, South Africa, and the Role of

Vaal Reefs Mine annually produces some 75 tonnes of gold. Stoping operations, using a scattered mining method, are conducted on several reef horizons within Witwatersrand Supergroup metasediments of the Klerksdorp Goldfield. Current grades average 7.19 g/t Au over a 133cm stoping width. The reef horizons, of which the Vaal Reef is the most important, consists

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Monday Geology Picture(s): Gold Reef City--

11.03.2013· For a few weeks, I'm sharing some pictures from a visit to Gold Reef City, a gold mining themed amusement park in Johannesburg, South Africa, back in September 2012. Last week I shared some pictures of the mining-themed entrance. This week I am sharing some pictures from the underground mine tour. The park is located on the site of an old gold mine. Now that water is no

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GOLD FIELDS - Mineral Resource and Mineral

Gold Fields reports its Mineral Resources and Mineral Reserves in accordance with the South African Code for The Reporting of Exploration Results, Mineral Resources and Mineral Reserves (2007 SAMREC Code), and other relevant international codes such as SEC Industry Guide 7, JORC Code and NI 43-101.

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The Significance of Erosion Channels on Gold

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. This channel is asymmetrical and lenticular in shape, measuring 150 to 180 m in width and up to 100 m in depth.

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The formation of gold deposits in South Africa

20.04.2017· 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 origin of the gold and uranium ores of the

01.01.2016· The Black Reef Formation is a laterally extensive sedimentary succession at the base of the Transvaal Supergroup. The quartz-pebble conglomerates host erratic concentrations of gold and uranium; however, in areas that are located spatially above the gold and uranium-bearing reefs of the Witwatersrand Supergroup, the concentrations can reach ore-grade.

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A geochemical study of the Theta Reef of the

For over a century the Sabie-Pilgrim's Rest Goldfield has been one of the most important gold producers in South Africa. The epigenetic gold deposits are situated at the eastern escarpment of the Eastern Transvaal Drakensberg, approximately 60 km away from the eastern rim of

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The formation of gold deposits in South Africa

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.

Get Price

Monday Geology Picture(s): Gold Reef City--

11.03.2013· For a few weeks, I'm sharing some pictures from a visit to Gold Reef City, a gold mining themed amusement park in Johannesburg, South Africa, back in September 2012. Last week I shared some pictures of the mining-themed entrance. This week I am sharing some pictures from the underground mine tour. The park is located on the site of an old gold mine. Now that water is no

Get Price

Gold - Minerals Council South Africa

For many years, South Africa was the world's primary gold producer. The glory days of the gold sector started waning in the early 21 st century as mines went deeper to find the rich reef patches. At the same time, the gold price had dropped significantly from the previous highs, and the global economy hit headwinds, culminating in the global financial crisis in 2008.

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GOLD FIELDS - Mineral Resource and Mineral

Gold Fields reports its Mineral Resources and Mineral Reserves in accordance with the South African Code for The Reporting of Exploration Results, Mineral Resources and Mineral Reserves (2007 SAMREC Code), and other relevant international codes such as SEC Industry Guide 7, JORC Code and NI 43-101.

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(PDF) A Review of the Witwatersrand Basin - The

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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Recycling of Paleoplacer Gold through

AbstractThe 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. The BRF is a strong seismic marker and consists of carbonaceous shale, quartz arenite, and conglomerate.

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South African Journal of Geology - ResearchGate

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 Jun 2012

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Mining Review Africa - Mining all of the reef, all

South Africa's reef deposits, especially gold and platinum-bearing ore bodies, are narrow and tabular. While legislation dictates a minimum operation height of 800 mm in areas where people work, some of the country's narrow reef mines have ore bodies with thicknesses of less than 500 mm, which results in ore dilution, as waste ore with zero economic value is also mined.

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South African History Online - Outcrop of Main

While it may be generally accepted that it was the identification of the gold-bearing conglomerate reef on the farm Langlaagte in February 1886 – with this month marking the 130th anniversary of that historic event – that proved the catalyst to what would be South Africa's greatest gold rush and mining bonanza, it cannot be regarded as the true moment of discovery.

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The origin of the gold and uranium ores of the

01.01.2016· The Black Reef Formation is a laterally extensive sedimentary succession at the base of the Transvaal Supergroup. The quartz-pebble conglomerates host erratic concentrations of gold and uranium; however, in areas that are located spatially above the gold and uranium-bearing reefs of the Witwatersrand Supergroup, the concentrations can reach ore-grade.

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Geotechnical areas associated with the Ventersdorp Contact

Ventersdorp Contact Reef, Witwatersrand Basin, South Africa by M.K. Roberts and J.K. Schweitzer* Synopsis The approximately 2800 Ma old Ventersdorp Contact Reef is a unique Witwatersrand orebody, from which about 6% of the world's gold production is derived. A major portion of this production is mined at depths exceeding 2500 m and deepest levels

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Gold Reef City | South African History Online

Gold Reef City is a re-creation of turn-of-the-century Johannesburg, which was flooded by prospectors after the discovery of gold in 1886. With its Victorian houses and geological displays, it offers many fascinating insights into life in Johannesburg long before the technological age.

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Witwatersrand - Wikipedia

At a first glance, the Witwatersrand basin, the largest known gold resource on our planet, is not automatically related to ocean research. However, in its 3 billion years old geological history, the Witwatersrand basin in South Africa has been covered by seawater, but experienced also episodes of drying out, flooding and erosion by rivers and the repeated coverage by seawater.

Get Price