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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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Largest Gold Deposits in the World Witwatersrand
2016-11-14 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
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Witwatersrand gold deposits formed by volcanic
2015-2-2 Witwatersrand gold deposits formed by volcanic rain, anoxic rivers and Archaean life Christoph A. Heinrich 1,2 Nature Geoscience volume 8,pages 206–209( 2015 ) Cite this article
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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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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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Ancient placer gold deposits SpringerLink
This amounts to about 26 t of gold/km 2. Another important deposit, the Vaal placer, which lies in the adjacent Klerksdorp goldfield, extracts about 32 t of gold/km 2. Production figures from the well-known Witwatersrand Supergroup placers illustrate their productivity relative to other types of gold deposits
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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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Gold Deposits and Their Geological Classification
2016-11-20 210 Exploration Geochemistry Table 1: Commonly recognized types of lode gold deposits and their main geological attributes. Deposit Type Type Example Selected Examples World; Canadian Geological Setting Form of Mineralization 1 Paleoplacer Witwatersrand (S. Africa) Tarkwa (Ghana), Jacobina (Brazil);
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Quartz-Pebble-Conglomerate Gold Deposits
2018-5-14 the gold. Deposits that formed prior to the Great Oxidation Event (circa 2.4 giga-annum [Ga]) contain pyrite, whereas younger deposits contain iron oxides. Uranium minerals and hydrocarbons are also notable features of some deposits. Much of the gold in these types of deposits forms crystalline features that are the product of local remobiliza
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Geochemical and morphological characteristics of
A relationship has been established between morphological features and fineness of gold particles and the distance over which they have been transported in recent alluvial placer deposits, such as the rivers of the Barberton Mountain Land, South Africa and the river Rhine in Germany. It was possible to show that most gold particles from the Witwatersrand conglomerates retained their detrital
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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
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The Formation of Gold deposits in South Africa
2021-7-23 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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Major Gold Deposit Types and Exploration process
2020-5-29 Major Gold Deposit Types and Exploration process N. N. Singh Indo Gold Mines Private Ltd, 68B Sect-9, HM; Udaipur, India 313001 [email protected] Gold occurs as primary commodity in a wide range of gold deposit types and settings. Three main clans of deposits are now broadly defined, each including a range of specific deposit types with common
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Witwatersrand gold deposits formed by volcanic
2015-2-2 Witwatersrand gold deposits formed by volcanic rain, anoxic rivers and Archaean life Christoph A. Heinrich 1,2 Nature Geoscience volume 8,pages 206–209( 2015 ) Cite this article
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The formation of gold deposits in South Africa
20 April 2017/Kiel. The Witwatersrand basin in South Africa hosts the largest known gold repository on Earth but how was it formed? Scientists of the GEOMAR Helmholtz Centre of Ocean Research Kiel and Canadian research institutes were able to figure out how parts of the Earth’s largest gold deposits formed about three billion years ago.
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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.
get price
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
get price
The Formation of Gold deposits in South Africa
2021-7-23 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
get price
Unravelling the gold source of a Witwatersrand-type
2017-9-4 world-class sized deposits hosted by the greenstone belt (RdV), and for paleoplacer deposits hosted by the late Archean/Paleoproterozoic Moeda Formation (MF). The MF has been compared to the Witwatersrand basin where there has been a long-term debate over the nature of the gold and
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The Witwatersrand Gold Field JSTOR
Although the Witwatersrand gold field is distinguished from all other gold fields by the regularity of its gold deposits, the distributional variations in reef conditions are remarkably complex. None of the reefs is continuous throughout the field. The spacing between the reefs, their thickness and
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Detrital origin of hydrothermal Witwatersrand gold
The Witwatersrand ‘basin’ is the largest known gold province in the world. The gold deposits have been worked for moren than 100 years but there is still controversy about the ore forming process.
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Gold Deposits and Their Geological Classification
2016-11-20 210 Exploration Geochemistry Table 1: Commonly recognized types of lode gold deposits and their main geological attributes. Deposit Type Type Example Selected Examples World; Canadian Geological Setting Form of Mineralization 1 Paleoplacer Witwatersrand (S. Africa) Tarkwa (Ghana), Jacobina (Brazil);
get price
Major Gold Deposit Types and Exploration process
2020-5-29 Major Gold Deposit Types and Exploration process N. N. Singh Indo Gold Mines Private Ltd, 68B Sect-9, HM; Udaipur, India 313001 [email protected] Gold occurs as primary commodity in a wide range of gold deposit types and settings. Three main clans of deposits are now broadly defined, each including a range of specific deposit types with common
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Gold accumulation in the Archaean Witwatersrand
The fact that the Witwatersrand-type gold deposits, a target for exploration, occur spatially and temporally within the Archaean/Palaeoproterozoic geological record demonstrates that the
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Significance of granite-greenstone terranes in the
2020-6-1 Witwatersrand-type gold deposits are further characterised by the presence of carbonaceous matter in the conglomerate horizons, as seams and nodules (see England et al., 2002, Frimmel et al., 2005, Mossman et al., 2008, Fuchs et al., 2016, Fuchs et al., 2017). We will only discuss genetic similarities and apparent variations in mineralisation
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Thermal properties of stratified rocks from
2009-8-27 from Witwatersrand gold mining areas by M.Q.W. Jones* Synopsis This paper summarizes important features of a compilation of thermal properties of stratified rocks from Witwatersrand gold mining areas. The database consists of more than 1000 thermal conductivity measurements, more than 700 density measurements, and nearly 100 heat capacity
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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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The Source of Witwatersrand Gold: Evidence from
2017-6-13 Witwatersrand gold palaeoplacer deposits revealed unusually high Au concentrations in rounded, detrital uraninite grains but no detectable Au in secondary, hydrothermally mobilised uraninite. A Au-enriched uraninite-bearing magmatic host is suggested as a significant source for detrital gold in the Witwatersrand
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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. Although the Witwatersrand has been subject for decades of research, the genesis of gold and uranium ore is
get price
The Witwatersrand Gold Field JSTOR
Although the Witwatersrand gold field is distinguished from all other gold fields by the regularity of its gold deposits, the distributional variations in reef conditions are remarkably complex. None of the reefs is continuous throughout the field. The spacing between the reefs, their thickness and
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Gold Deposits EOLSS
2020-8-18 much debate. Aspects of the genesis of many gold deposits remain unanswered, highlighted by the continued debate into the origins of the gold deposits of the Witwatersrand basin. 1. Introduction Gold is considered to be a rare metal since, on average, the earth contains less than one-third of a gram of gold for each tonne of its mass.
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Witwatersrand Gold Rush The Famous South
A brief overview of the history and development of Witwatersrand, the famous gold mine of South Africa. With photos, facts, and figures about its impact on the growth of the region, the history of precious metals in the area, and the people that have mined the gold
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“Wits 2.0” and Palaeoplacer Gold Deposits Caracle
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 Australia, we believe that Caracle Creek’s
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Onset of Crustal Gold Cycle Triggered by First Oxygenic
2017-6-13 Gold has been concentrated in a huge variety of deposit types through a diverse range of magmatic, hydrothermal and sedimentary processes. By far, the two most important gold deposit types are conglomerate-hosted (Witwatersrand-type) and orogenic-type deposits. Temporal distribution of orogenic gold deposits is
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Thermal properties of stratified rocks from
2009-8-27 from Witwatersrand gold mining areas by M.Q.W. Jones* Synopsis This paper summarizes important features of a compilation of thermal properties of stratified rocks from Witwatersrand gold mining areas. The database consists of more than 1000 thermal conductivity measurements, more than 700 density measurements, and nearly 100 heat capacity
get price
Major Gold Deposit Types and Exploration process
2020-5-29 Major Gold Deposit Types and Exploration process N. N. Singh Indo Gold Mines Private Ltd, 68B Sect-9, HM; Udaipur, India 313001 [email protected] Gold occurs as primary commodity in a wide range of gold deposit types and settings. Three main clans of deposits are now broadly defined, each including a range of specific deposit types with common
get price
Lina Jakaitė Witwatersrand gold deposition
I've had interesting work to do in collaboration with Dr. Glen Nwaila and Prof. Hartwig Frimmel. The result of which is three illustrations of Mesoarchaean-Neoarchaean environments within which the Witwatersrand-type gold deposits formed.
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Chapter 10 A Giant Mesoarchean Crustal Gold
2014-9-12 Comparison of conglomerate-hosted, Witwatersrand-type gold deposits and/or occurrences worldwide reveals that this deposit type is by no means unique to the Kaapvaal craton but common to most Archean and/or Paleoproterozoic cratons. The age of the variably mineralized fluvial to fluvio-deltaic conglomerates ranges from 3.1 to 1.9 Ga.
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Stratiform gold occurrences of the Witwatersrand type in
the Huronian gold occurrences and those of the Witwatersrand. Therefore, examples of each of four different types of Witwatersrand gold, namely: very fine particles of placer gold; secondary auriferous quartz veins; dia genetically recrystallized gold; and precipitated gold associated with kerogen are known within the Huronian succession.
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