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Krantzberg Mine, Omaruru, Erongo Region, Namibia

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Latitude & Longitude (WGS84): 21° 23' 59'' South , 16° 1' 0'' East
Latitude & Longitude (decimal): -21.40000,16.01667
GeoHash:G#: kk5qk2nzz
Locality type:Mine
Köppen climate type:BWh : Hot deserts climate


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.



Mineral List


43 valid minerals.

Regional Geology

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

Cambrian - Neoproterozoic
485.4 - 1000 Ma



ID: 3184300
Precambrian-Phanerozoic intrusive rocks

Age: Neoproterozoic to Cambrian (485.4 - 1000 Ma)

Comments: Damara Granites

Lithology: Intrusive igneous 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. [154]

Neoproterozoic
541 - 1000 Ma



ID: 3310126

Age: Neoproterozoic (541 - 1000 Ma)

Lithology: Metamorphic

Reference: Thiéblemont, D. (ed.). New edition of the 1:10,000,000 geological map of Africa. CGMW-BRGM. [190]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License



This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.

References

Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
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.
Cairncross, B. (2004) Field Guide To Rocks & Minerals Of Southern Africa.
Cairncross, B. and U. Bahmann (2006) Famous Mineral Localities: The Erongo Mountains Namibia. Mineralogical Record 37, No. 5, 361-470.
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 German).
Bezing, L. von, Bode, R. & Jahn, S. (2008) Namibia Minerals and Localities. Edition Schloss Freudenstein, Bode Verlag GmbH, Haltern. (in English).

Mineral and/or Locality  
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