Geochemistry and Mineralogy of Supergene Altered Manganese Ore Below the Kalahari Unconformity in the Kalahari Manganese Field, Northern Cape Province, South Africa PDF Download
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Author: Andries Petrus Du Plooy
Publisher:
ISBN:
Category : Geochemistry
Languages : en
Pages : 192
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Author: Andries Petrus Du Plooy
Publisher:
ISBN:
Category : Geochemistry
Languages : en
Pages : 192
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Author:
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 278
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Author: P. R. De Villiers
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 84
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Author: P. R. De Villiers
Publisher:
ISBN:
Category : Cistecephalus
Languages : en
Pages : 802
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Author: Nicholas Andrew Vafeas
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 220
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Author:
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ISBN:
Category :
Languages : en
Pages : 24
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South Africa's primary manganese production comes from the Kalahari manganese field, situated in the northern Cape Province. The mineralization is of volcanogenic sedimentary origin, and is found in five structurally controlled basins. Of these the Kalahari basin is the most important regarding size, and is the only one being exploited economically. Three major economic grades of manganese are differentiated. These are, in declining order of relative abundance, (i) diagenetic Mamatwan type ore; (ii) hydrothermally reconstituted Wessels type ore; and (iii) ferruginous Black Rock type ore.
Author: Lauren Cher Blignaut
Publisher:
ISBN:
Category : Geochemistry|zSouth Africa|zNorthern Cape
Languages : en
Pages : 325
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Author:
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Category :
Languages : en
Pages :
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The manganese horizons of the Kalahari manganese field, in the north-western Cape Province, Republic of South Africa, are interlayered in the banded ironstones of the Voelwater Jasper Formation. Structurally, these rocks are located in the trough of the Dimoten syncline. Minerals encountered in the ore are mainly braunite, hausmannite, bixbyite, cryptomelane, and jacobsite. The location, history, and present status of the various mines operating within this field are discussed. These are the Hotazel, Devon, Langdon, Mamatwan, Middelplaats, Smartt, N'Chwaning, Wessels, and Black Rock Mines. The ore reserves within the manganese field, which are estimated to amount to 12 566 Mt, are of three types: (i) ores with high manganese and metal contents, (ii) ores with a low metal content but with a high manganese-to-iron ratio, and (iii) low-grade ores. Currently, South Africa produces 24 per cent of the total manganese requirements of the world. The ore is hard and, if of type (ii) or (iii) virtually self-fluxing because of its calcium carbonate content, and has a favourable manganese-to-iron ratio.
Author: Pierre Retief De Villiers
Publisher:
ISBN:
Category : Manganese mines and mining
Languages : en
Pages : 484
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Author: B. Cairncross
Publisher:
ISBN:
Category : Manganese mines and mining
Languages : en
Pages : 262
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