This research comprises two case studies to prove the effectiveness and viability of optical sorting of Witwatersrand type conglomerate ores.
Stratigraphy of the Central Rand Group showing the sub groups, formations and gold bearing conglomerate reefs of the seven major goldfields. The more important reefs are shown in red. (After SACS ...
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 …
The Witwatersrand gold fields of South Africa account for more than a third of the world's total gold production since mining started there in 1886: 48,000 t Au. These gold fields dominated production throughout the twentieth century, but production peaked at 1,000 t in 1970 and has steadily declined since that time.
The Witwatersrand gold deposit is the largest in the world. Thermodynamic calculations show that such rich accumulations of gold could be linked to abundant …
KDC is located in the West Wits Line that forms part of the Far West Rand Goldfields situated on the northwestern rim of the Witwatersrand Basin. The Witwatersrand Basin …
Novo Resources has pulled a rabbit out of a hat by snapping up Millennium Minerals and its Golden Eagle gold processing plant at Nullagine in WA. The bold move sets the stage for the company to become Australia's first conglomerate gold producer.
West Wits Mining has acquired three in-production gold mining leases in the Pilbara with the intention of expanding its Tambina project.
Determine if you've struck gold If you're out prospecting, you want to be sure what you're taking home is the real stuff—gold ore. The best way to tell if gold is real is to hire a professional assayer, but that's not always feasible,...
As with all other gold-bearing conglomerates found in the Witwatersrand Basin, pyrite, the most abundant ore mineral in the Black Reef ore deposit, can be classified into three main classes (da Costa et al., 2020 ): (1) detrital (or allogenic) pyrite; (2) diagenetic (or authigenic) pyrite that formed in situ after deposition; and (3 ...
The pre-mining soil and sediment signatures of quartz-pebble-conglomerate gold deposits are dependent upon host-rock mineralogy, ore mineralogy, climate, topography, and the …
The increased precious and critical metal content at the intermediate conglomerate (IC) is related to the sudden change in host rock hydraulic conductivity, separating the cohesive lower andesitic breccia–VB (refractory ore) and the unconsolidated, highly porous and syngenetic to the ore overlying felsic sandstone (FES).
Microfabrics of detrital quartz grains and quartz cement of four gold- and uranium-bearing conglomerates of various goldfields of the Witwatersrand Basin, South Africa, were investigated by optical and cathodoluminescence microscopy. The study revealed that the vast majority of quartz grains (<5 mm) originate from felsic magmatic …
This subgroup is mainly an aggradational sequence of arenitic fluvial braid-plain deposits. Occasional erosional episodes resulted in widespread peneplanation and thus disconformities that are overlain by conglomeratic placer deposits. Local concentration of gold to ore grade …
Pyrite is the most abundant ore mineral in gold-bearing quartz pebble conglomerates (QPCs) of the Witwatersrand Basin and similar Archaean sedimentary units. Much of the pyrite in Archaean conglomerates is detrital in origin, implying that it survived weathering, transport, and reworking under anoxic conditions.
The Minerals & Investment Week presents 4 Industry Conferences under one roof, allowing the finance & investment community, service, engineering & supply industries to switch sessions and plan a track to suit their requirements. This year's conference will run concurrently with the 21st Global Iron Ore & Steel Forecast Conference, 19th Mineral …
Mondeor Conglomerate Formation is the uppermost formation of the Witwatersrand Basin. The type locality is situated south of Johannesburg on the Central Rand where resistant, well developed ...
Pyritic quartz-pebble conglomerates from pre-Witwatersrand as well as from lower and upper Witwatersrand sediments show far reaching similarities in their ore mineralogy. The erratic and low gold and uranium contents of the investigated pre-Witwatersrand conglomerates, to a large extent, is explained by the inefficiency of the operating …
The conglomerate west of a certain point in Douglas County is barren of the gold and the quartzite, indicating the source material forming the western part of the conglomerate was tributaries flowing from west of Castle Rock, rather than from the north. Sadly, those tributaries were not gold bearing.
In South Africa, Witwatersrand Basin has the world's largest placer gold deposit. Brazil's gold ores exist with diamonds. In Australia, gold is present wherever pyrites can be found. So how to extract gold from different types of gold ore?
Mineral deposits are formed as the result of coincidental combinations of circumstances, leading to enhanced metal concentrations with unique characteristics. The conglomerate-hosted gold deposits in the Witwatersrand Supergroup (South Africa) constitute the best-endowed gold province and include the largest palaeoplacer …
The Mesoarchaean Witwatersrand Basin represents the largest known gold anomaly and has produced more gold than any other ore province in the world. Deposition of the predominantly siliciclastic ...
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.
This feeder workshop of WITS provides a forum that extends WITS' networks into other IS researchers while fostering the exchange of decent research ideas. We welcome submissions that are theoretical, empirical, analytical, or technical in nature. Contributions on various topics and perspectives are encouraged, including but not limited to Ethics, …
Commenting on the furore surrounding the recent discoveries of conglomerate gold in the Pilbara region, in Western Australia, he notes that some of the excitement is understandable, as the ...
Abstract. Beatrix Mine is located 35 km south of the city of Welkom in the Welkom Goldfield and as such forms the most southerly ofthe Witwatersrand-type gold mines. The Beatrix Reef overlies an angular unconformity at thebase of the Turffontein Subgroup, Central Rand GroupSignificant, southerly truncation of over 600m of theJohannesburg ...
The basin itself is world renowned for its endowment in gold and uranium, with both gold and uranium minerals found in thin beds of quartz-pebble …
The Witwatersrand gold fields of South Africa account for more than a third of the world's total gold production since mining started there in 1886: 48,000 t Au. These …
Most recent research on the Witwatersrand gold deposits has focused on postdepositional processes, often on a microscale, thereby constraining conditions of …
