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Witwatersrand Basin - Wikipedia

The gold in the Witwatersrand Basin area was deposited in Archean river deltas having been washed down from surrounding gold-rich greenstone belts to the north and west. Rhenium-osmium isotope studies indicate that the gold in those mineral deposits came from unusual 3000 million year old...

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Witwatersrand Gold Rush - Wikipedia

But it was not until 1886 that the massive wealth of the Witwatersrand would be uncovered. Scientific studies have pointed to the fact that the "Golden Arc" which stretches from Johannesburg to Welkom was once a massive inland lake, and that silt and gold deposits from alluvial gold settled in the area to form the gold-rich...

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Largest Gold Deposits in the World – Witwatersrand Gold Fields ...

Nov 14, 2016 ... The gold fields of the Witwatersrand Basin in South Africa are, by a landslide, the largest single gold producing district in the world. It has produced some 2 billion ounces over a century of mining and at an average grade of 15 g/t Au with a current head grade of 6-10 g/t Au and they still have estimated...

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Witwatersrand Gold Deposits - 911 Metallurgist

Feb 14, 2018 ... Here is some history of the Witwatersrand Gold Style Ore Deposits as they related to South Africa since the arrival of the Dutch and the southernmost tip of the continent in 1652. The Dutch set up a small fort where Cape Town stands today and started Market Gardens as a place that the Dutch East India...

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Witwatersrand gold deposits formed by volcanic rain, anoxic rivers ...

Feb 2, 2015 ... Precipitation of the richest gold deposits could have been triggered by chemical reduction of the dissolved gold onto organic material in shallow lakes and pools. I conclude that the Witwatersrand gold could have formed only during the Archaean, after the emergence of continental life but before the rise of...

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The formation of gold deposits in South Africa - Phys.org

Apr 20, 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. Although the Witwatersrand has been subject for decades of research, the genesis of gold and uranium ore is still...

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Ore deposits: Witwatersrand Gold Deposits [Part 8] - YouTube

Nov 3, 2014 ... http://www.world-earthquakes.com This video is for education purpose only!

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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...

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Witwatersrand Basin (RSA)

The name "Witwatersrand" is Afrikaans (originating out of Dutch, French and German) for "White Waters Ridge". The name was derived from the white quartzite ridge which strikes parallel to the edge of the basin in which the sediment was deposited. The gold mines in this area are situated around an ancient sea (over 2700...

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The geochemistry of Witwatersrand-type gold deposits and the ...

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...

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Ore Deposits 101 - Part 8 - Witwatersrand Gold Deposits on Vimeo

Jan 15, 2013 ... Part 8 of an 11 part series introducing ore deposit geology to non-technical people. This one covers the Witwatersrand gold deposits, how they were discovered, how…

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Gold in South Africa - Semantic Scholar

Aug 8, 1986 ... to other sources of South African gold, some of which are growing in importance. For 1980 and 1985, the Rand. Refinery reports5 the figures shown in Table Il for specific categories ,of producer, none of which is a memb(:r of the Ch~mber of Mines of South Africa. TABLE 11. PRODUCTION OF GOLD BY...

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The formation of gold deposits in South Africa: Research team ...

Apr 20, 2017 ... The Witwatersrand basin in South Africa hosts the largest known gold repository on Earth -- but how was it formed? Scientists were able to figure out how parts of the Earth's largest gold deposits formed about three billion years ago. Crude oil and hot hydrothermal fluids played a major role.

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Origin of World's Largest Gold Deposit Found? - National Geographic

Sep 23, 2002 ... The radioactive decay of metal specks inside South African gold nuggets may have helped an international team of scientists determine the origin of the world's largest gold deposit. The discovery, described in a recent issue of the journal Science, not only sheds light on Earth's early geology, but promises...

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Johannesburg (South Africa) – Gold mining belt Witwatersrand

Johannesburg (South Africa) – Gold mining belt Witwatersrand. The map gives an overview of the ethnic, social and economic differentiation in the Witwatersrand Region, with the metropolis of Johannesburg at its heart. The region is at the centre of South African gold mining, which has permanently marked the man-made...

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Did stinky conditions create tons of gold? - Futurity

Feb 5, 2015 ... How did the world's largest gold deposits end up in South Africa's Witwatersrand Basin? A new theory points to hydrogen sulfide—rotten egg smell.

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Genesis of the Witwatersrand gold-uranium deposits | Economic ...

Abstract. Suggests that the uranium in Precambrian conglomerates of the Witwatersrand, South Africa, is biogenic in origin and was concentrated, together with pyrite, by microorganisms in an anaerobic environment, possibly along a steep coast line in relatively deep waters containing hydrogen sulfide. At some later stage,...

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economic geology research unit - Wits University

the Witwatersrand still accounted for 34 percent of all gold won from all countries in the latter year. Perhaps, a more-impressive picture of this ore- deposit can be painted by covering the whole canvas, stretched over 101 years, from the discovery of the gold-bearing conglomerates, in March, 1886, near. Johannesburg, and...

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Gold Mining in South Africa. South African Gold and Diamond Mines

Until just recently, South Africa has held the distinction of being the largest gold producer in the world. With some of the richest reserves on earth, the foundation of the South African economy is based on mining. Gold mining has been a driving force for the development of the country ever since it was discovered there in the...

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Deep in a South African gold mine, scientists drill for the heart of an ...

Deep in a South African gold mine, scientists drill for the heart of an earthquake. By Paul Voosen May. 31, 2017 , 11:00 AM. It's no easy feat to drill into the faults that cause earthquakes. Intercepting such active ruptures, which are buried kilometers beneath the surface, requires specialized equipment, skilled crews, and a lot...

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Infographic: Descend Into The World's Deepest Gold Mine

Dec 8, 2016 ... The Vredefort crater, the world's largest impact crater at about 200 miles in diameter, is now 2.02 billion years old and potentially helped reveal the Witwatersrand gold outcrops. The Mponeng gold mine, located west of Johannesburg and owned by AngloGold Ashanti, takes advantage of some of the...

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“Wits 2.0” and Palaeoplacer Gold Deposits – Caracle Creek ...

Nov 26, 2017 ... Caracle Creek has extensive experience in the understanding, modelling and targeting of palaeoplacer gold deposits having worked on gold deposits in the Witwatersrand of South Africa and on exploration projects targeting these deposit types in Canada. Although early days in the Pilbara of Western...

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Stoping in Witwatersrand gold mines during the past ... - CiteSeerX

SYNOPSIS. In any mining enterprise, the extraction of the ore from the orebody is of vital importance. This activity is stoping. The gold mines of the Witwatersrand and its extensions in the Klerksdorp, Welkom, and Evander areas form the most extensive goldfield in the world. This address reviews stoping technology and...

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Explosives utilization at a Witwatersrand gold mine

STUDENT EDITION. Explosives utilization at a Witwatersrand gold mine. M. Gaula. University of the Witwatersrand, Johannesburg. SYNOPSIS. Gold bearing deposits of the Witwatersrand basin are generally less than 2m thick and require conventional narrow-reef mining methods for extraction and employ explosives as a...

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The viability of using the Witwatersrand gold mine tailings for ...

STUDENT EDITION. The viability of using the Witwatersrand gold mine tailings for brickmaking. M. Malatse; S. Ndlovu. School of Chemical and Metallurgical Engineering, University of the Witwatersrand, Johannesburg, South Africa. SYNOPSIS. The Witwatersrand Basin is the heart of South Africa'a gold mining industry.

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Discovery of the Gold in 1884 | South African History Online

Apr 28, 2016 ... On 14 September 1886, the first large mining company on the Reef, the Witwatersrand Gold Mining Company, was formed with a total nominal capital of £3,063,000. The first crushing battery, consisting of five stamps, had been erected on the Reef in 1885 to service the Struben's excavations on the lower...

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Gold Mining in South Africa | Investing News Network

Oct 2, 2015 ... Geological Perspective. South Africa's expansive gold ore deposits represent a considerable part of the world's reserves with approximately 95 percent of the mines operating underground reaching depths of over 3.8 km. The main gold producing area is concentrated on the Archaean Witwatersrand Basin.

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South-African-Mines - Mining Artifacts

The first mining concern (the Nil Desperandum Co-operative Gold Company) was formed at Blaauwbank in 1874.]Gold was mined at various places on the Rand up to 1886, when the discovery of the Witwatersrand Main Reef set off the historic Witwatersrand Gold Rush. Diamond and gold production may now be well down...

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Gold Production Declining in South Africa - RareGoldNuggets.com

Oct 23, 2015 ... The Witwatersrand Gold Rush of 1886 helped bring South Africa to prominence. The Golden Arc of gold deposits was believed to have once been an inland lake and that gold deposits settled into the region over time. The demand for gold mining activities in the area eventually led to the foundation of...

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South Africa - Porter GeoConsultancy - Ore Deposit Description

The Witwatersrand gold - uranium mines in north-central South Africa, between Johannesburg in Gauteng and Welkom in the Free State, have contributed over 50% of all of the gold produced in the world to date. These mines are distributed around the arcuate, active, fault bounded, north to north-western to western...

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DEPARTMENT OF THE INTERIOR U. S. GEOLOGICAL SURVEY ...

Fluvial gold placers and basin-margin rotation. Eric R. Force. Introduction. A single placer field, the Witwatersrand in South Africa, has produced over half the world's gold. Other fluvial placer fields have also been very productive, so that fluvial placer deposits clearly are the most important type of gold deposit.

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Inhospitable climate fosters gold ore formation | ETH Zurich

Feb 2, 2015 ... South Africa's Witwatersrand is the site of the world's largest and richest gold deposit. In order to explain its formation, ETH professor Christoph Heinrich took a look back into the Earth's early climatic history. Photo: James St. John / Wikimedia Commons. The richest gold ore in Witwatersrand is found in thin...

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Western Australia a Gold Mine of Opportunities

Dec 13, 2016 ... One aspect that makes Pilbara such an interesting gold prospect is its unique geological history. The region hosts gold deposits similar to those of the world famous Witwatersrand basin of South Africa — a jurisdiction that accounts for 40 per cent of all gold ever mined. Recent research has shown that the...

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South African Gold Mine | MINING.com Video - InfoMine

Mining for gold in a South African underground mine. Footage from Gold! The History of Man's Greatest Obsession.

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Witwatersrand | mountain ridge, South Africa | Britannica.com

Its rich gold deposits, occurring in conglomerate beds known as reefs, were discovered in 1886. A heavy in-migration of miners followed, and the city of Johannesburg grew near the centre of the Witwatersrand. The tailing dumps of the gold mines stretch the entire length of the ridge, and chains of lakes created by water...

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The World's 10 Most Prolific Gold Fields | CMI Gold & Silver

Mar 31, 2011 ... It is estimated the 40% of all of the gold ever mined has come out of the Basin. In 1970, South Africa's output accounted for 79% of the world's gold production. By 2009, South Africa's share of world gold production had dropped to less than 8%. Mining in the Witwatersrand Basin is accomplished by creating...

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The Witwatersrand pyrites and metamorphism - RRuff

Its study requires an intimate knowledge of all mineral components in the reefs, in particular their genetic relationship to gold and their usefulness as markers of distribution patterns. Of the ore minerals present in Witwatersrand reefs, pyrite is the most conspicuous, occurring typically in the matrix of the conglomerate, as.

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Pilbara Gold - The Wits End Project - Western Australia ...

International Prospect Ventures entered into an agreement with a New South Wales, Australia company (the "Joint Owner"), pursuant to which International Prospect Ventures and the Joint Owner will jointly acquire certain mining claims located in Western Australia (the "Claims"), each with an undivided 50% interest.

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Witwatersrand Basin: Where Gold Comes From - MGS Precious ...

Jan 16, 2013 ... Gold is mined almost all over the entire world, and many places are famous for their gold deposits. Who can forget the California gold rushes, or the massive gold nuggets in Australia, or the birth of the gold standard near ancient Europe? But in the grand scheme of things, it's all scraps compared to...

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TriStar Gold, another Wits-lookalike in Brazil | MINING.com

Sep 27, 2016 ... Bob Moriarty of 321 Gold delves into the origins of gold to try to understand TriStar Gold's Witwatersrand-type deposit in Brazil. I've been writing about Novo Resources Corp. (NVO:TSX.V; NSRPF:OTCQX) and their Witwatersrand lookalike deposit for over five years. Well, Quinton Hennigh is associated with...

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