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As part of the Witwatersrand, the largest gold mineralization on earth, Mponeng is the result of the discovery of the basin by Europeans. Beginning in the 1850-70s a series of mineral discoveries were made in the area, including those of Pieter Jacobus Marais panning gold from a river and Henry Lewis finding quartz and gold vein on a farm, that led to the Witwatersrand Gold Rush in 1886. [9]
This list of deepest mines includes operational and non-operational mines that are at least 2,212 m (7,257 ft), which is the depth of Veryovkina Cave, the deepest known natural cave in the world. The depth measurements in this list represent the difference in elevation from the entrance of the mine to the deepest excavated point.
Desulforudis audaxviator is the only bacterium found in water samples obtained 2.8 kilometres (1.7 mi) underground in the Mponeng Gold Mine in South Africa. [2] [3] Approximately four micrometres in length, it survives on chemical food sources derived from the radioactive decay of minerals in the surrounding rock.
The deepest mines in the world are the TauTona (Western Deep Levels) and Savuka gold mines in the Witwatersrand region of South Africa, which are currently working at depths exceeding 3,900 m (12,800 ft). [5] There are plans to extend Mponeng mine, a sister mine to TauTona, down to 4,500 m (14,800 ft) in the coming years. [citation needed]
The TauTona Mine, formerly Western Deep Levels No.3 Shaft, [1] is a gold mine located in the West Wits gold field west of Johannesburg. The mine is near the town of Carletonville in South Africa. At approximately 3.9 kilometers (2.4 mi) deep, it is home to the world's second deepest mining operation, rivalled only by the Mponeng Gold Mine ...
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Getting a good night's sleep can be a little more challenging amid the hype of the holidays. With changes in routine, diet and potentially time zones, quality sleep could be difficult to come by ...
A 2015 paper reported [17] an average atmospheric relative humidity 17.3%, and soils relative humidity a constant 14% at depth of 1 meter, which corresponds to the lowest humidity measured by Curiosity rover on Mars. This region's maximum atmospheric relative humidity is 54.7% compared with 86.8% for the Yungay region.
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