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Kalahari Manganese Field geologic map. The N'chwaning mine (or N'Chwaning mines) are located in the Northern Cape Province of South Africa.N'chwaning has one of the largest manganese reserves in South Africa having estimated reserves of 323.2 million tonnes of manganese ore grading 42.5% manganese. [1]
The Postmasburg Manganese Field's (PMF) history began with early geological mapping in 1930 and local prospecting in 1940s. [1] Systematic exploration in the 1950s led to discoveries at Gloria mine (1953), Nchwaning mine (1955), Mamatwan mine (1957), and Wessels mine (1958). Mining commenced with Gloria Mine in 1957, followed by Nchwaning in ...
The Wessels mine is a mine located in the west of South Africa in Northern Cape. Wessels represents one of the largest manganese reserve in South Africa having estimated reserves of 198.8 million tonnes of manganese ore grading 55% manganese metal.
The Kalahari Manganese Field (KMF) located in the Northern Cape of South Africa is a source of manganese. [11] Hotazel Manganese Mines, [12] near Hotazel; Khwara Manganese [11] Mokala Manganese [11] Tshipi Borwa Manganese Mine [11]
Olmiite is a rare calcium-manganese silicate that was named after an Italian mineralogist called Filippo Olmi. It was approved by the IMA in 2006, with its first description published in 2007. [ 1 ] Around 2001, a large amount of specimens believed to be poldervaartite was discovered at the N'Chwaning II mine, which is near the Wessels mine ...
The Middelplaats mine is a mine located in the west of South Africa in Northern Cape. Middelplaats represents one of the largest manganese reserves in South Africa , having estimated reserves of 52 million tonnes of manganese ore, grading 38% manganese metal.
Kutnohorite is a rare calcium manganese carbonate mineral with magnesium and iron that is a member of the dolomite group. It forms a series with dolomite, and with ankerite.The end member formula is CaMn 2+ (CO 3) 2, [6] but Mg 2+ and Fe 2+ commonly substitute for Mn 2+, with the manganese content varying from 38% to 84%, [2] so the formula Ca(Mn 2+,Mg,Fe 2+)(CO 3) 2 better represents the species.
It was named manganvesuvianite for the significant manganese in its formula and its relation to vesuvianite. [3] The mineral and name were approved by the IMA Commission on New Minerals and Mineral Names (IMA 2000-40). [3] [7] The type specimen from the N'Chwaning II Mine is held at the Natural History Museum of Bern in Switzerland. [11]