Latitude: 21°24'S
Longitude: 16°1'E
A large tungsten deposit on the Krantzberg Mt (1714 m above sea-level), now abandoned. Located 19 km SW of Omaruru on the border of Pistelwitz 128 and Omaruru Townlands 85 (farms). Presently, access is prohibited.
A greisen-hosted W ore deposit with minor F, Sn, Be, Bi, Mo, and Fe-Cu sulfides. The ores were localized through an episode of alteration-mineralization related to the emplacement and fractionation of the Erongo A-type granite; this H2O-poor, but B- and F-rich granite was intruded after the collapse of the Erongo caldera. Granite fractionation resulted in H+- and B-enriched fluids which metasomatized and mineralized the roof country rocks. Early-stage greisenization and the later sericitization were accompanied by the concentration of dominant wolframite, fluorite, beryl, and sulfides. This alteration-mineralization occurred along major lithological and structural breaks. Wolframite (ferberite) formed during a stage of high F activity in the hydrothermal system.
Located on the border of Pistelwitz 128 and Omaruru Townlands 85 (farms).
Mineral List
52 entries listed. 41 valid minerals.
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References
- Pirajno, F. & Schlögl, H. U. (1987): The alteration-mineralization of the Krantzberg tungsten deposit, South West Africa/Namibia. South Afr. J. Geol. 90, 499-508.
- Werner, A.B.T., Sinclair, W.D., and Amey, E.B. (1998): International Strategic Mineral Issues Summary Report - Tungsten. US Geological Survey Circular 930-O.
- Jahn, S. & Bast, R. (2006): Der Krantzberg bei Omaruru, Namibia, und die Mineralvorkommen in seiner Umgebung. Mineralien-Welt 17 (3), 32-48.
- Bezing, L. von, Bode, R. & Jahn, S. (2007): Namibia. Minerals and Localities. Edition Schloss Freudenstein, Bode Verlag, Haltern (in English)
Cairncross, B. and U. Bahmann (2006): Famous Mineral Localities: The Erongo Mountains Namibia. Mineralogical Record 37, No. 5, 361-470.
Bezing, L. von, Bode, R. & Jahn, S. (2008): Namibia Minerals and Localities. Edition Schloss Freudenstein, Bode Verlag GmbH, Haltern, 259-266 pp. (in English)
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