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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 ...
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.
The ore body was discovered in 1940 by Assmang, and led to the acquisition of a manganese outcrop. The properties on which the ore is situated were subsequently acquired by Assmang, and led to the 1975 commissioning of the Gloria mine (medium grade carbonated ore) as well as the later commissioning in 1972, 1981 and 2004 respectively of the N'Chwaning I, I and III shafts.
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]
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 Gloria mine is a mine located in the north of South Africa. Gloria represents one of the largest manganese reserve in South Africa having estimated reserves of 156.2 million tonnes of manganese ore grading 33% manganese metal.
Effenbergerite is the natural occurrence of the color Han blue.It was first found in the Wessels mine, Kalahari Manganese Field, [1] South Africa. [2] Effenbergerite was approved as a valid mineral species by the IMA in 1993. [3] Effenberergite has the chemical formula BaCuSi 4 O 10. [4]
According to the 2001 census, Kuruman had a population of 9,824, of which 4,267 (43.4%) were Coloured, 3,549 (36.1%) were White and 1,969 (20.0%) were Black.The most spoken language at home was Afrikaans with a percentage of 80.68%, followed by Tswana language with 14.8%.