N'Chwaning I Mine, N'Chwaning Mines, Kuruman, Kalahari manganese field, Northern Cape Province, South Africa
|Latitude & Longitude (WGS84):||27° 8' 7'' South , 22° 52' 13'' East|
|Latitude & Longitude (decimal):||-27.13528,22.87028|
|Other regions containing this locality:||Kalahari Desert, Africa|
|Köppen climate type:||BSh : Hot semi-arid (steppe) climate|
A closed manganese mine owned by Assoc. Manganese Mines of South Africa, Ltd.
The north-western areas, where mining began, were noted for the presence of exceptional rhodochrosite specimens associated with mainly manganite and drusy secondary quartz. The ore consisted here mainly of the Hotazel Supergroup. Later mining shifted to the southern areas. Here well crystallized hausmannite, barite, hydroxyapophyllite, inesite, brucite and celestine where found and rhodochrosite became a rarity.(Extract from Cairncross et al, 1995)
Note: Majority of the red rhodochrosite specimens are from this mine and not N'Chwaning II mine.
48 valid minerals. 2 erroneous literature entries.
This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.
Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org
|Quaternary - Tertiary|
0 - 66 Ma
|Cenozoic sedimentary rocks|
Age: Cenozoic (0 - 66 Ma)
Lithology: Sedimentary rocks
Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529. 
0 - 66 Ma
|Pleistocene - Paleogene|
0.0117 - 66 Ma