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Location: 217 km NE from Upington, South Africa
1 Peperboom Avenue, Northern CapeHotazelSouth Africa8490
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Mining scale, mining and mill throughput capaciites.Full profiles of select mines and projects.
Shaft depth, mining scale, backfill type and mill throughput data.Full profiles of select mines and projects.
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South32 Ltd. holds a 60 per cent interest in Samancor Holdings (Pty) Ltd (Samancor Holdings) and Anglo American Plc holds the remaining 40 per cent.
Samancor indirectly owns 74 per cent of HMM, which gives the South32 Ltd. its indirect ownership interest of 44.4 per cent. Anglo American Plc effective ownership interest in HMM is 29.6%.
The remaining 26 per cent of HMM is owned by Broad-Based Black Economic Empowerment (B-BBEE) entities.
South African manganese deposits are confined to the Early Proterozoic Transvaal Supergroup, Northern Cape Province. They can be grouped into two major categories: 1. Syngenetic carbonate-rich manganese deposits interbedded with the banded iron formations (BIF) of the Hotazel Formation, colloquially called the Kalahari Manganese Field. 2. Karst-fill type manganiferous material from residual Fe-rich manganese developed in dolomites of the Campbell Rand Subgroup in the Postmasburg Fe-Mn Fields. The Kalahari Manganese Field is situated within a structural basin, known as the Dimoten Synclinorium, plunging at an angle of 3° to 8° to the north and northwest. It extends from Mamatwan Mine in the south for approximately 40 km to Wessels Mine in the north, with an east-west extent varying between 5 and 15 km.Local GeologyWessels Mine extracts high grade (above 47% Mn) manganese ore. The ore is typically coarse grained, shiny, massive or vuggy, with the principal minerals being hausmannite and braunite II (Wessels-type ore), as opposed to primary, lower grade braunite further to the south in the Kalahari Basin (Mamatwan-type ore). The interpretation is that the Wessels-type ore was formed by hydrothermal alteration of primary Mamatwan-type ore and that the alteration took place along a system of post-Olifantshoek, north-south and east-west striking normal faults.
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