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Navachab Gold Mine, Karibib District, Erongo Region, Namibia

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Latitude & Longitude (WGS84): 21° 58' 51'' South , 15° 45' 55'' East
Latitude & Longitude (decimal): -21.98083,15.76528


The deposit, with very fine-graind gold, was discovered as a result of a geochemical exploration program in October 1984, during exploration for carbonate-hosted gold deposits area. It was discovered on the farm Navachab, 6 km south of the main Okahandja-Swakopmund tar road, and ca. 10 km SW of Karibib. Construction work began in 1988.

The 35 metre-thick ore body is hosted in a thick marble unit. The ore body dips at 70' to the west and plunges at 14' to the north and it is mined by open-cast method to a depth of over 200 metres. The ore body is estimated to contain 10.4 million tones of ore with average grade of 2.3 grams of gold per ton and a further 6.5 million tones of marginal ore with an average grade of 0.66 grams per ton. It was originally anticipated that the life of mine would be in the region of 13 years.

85% of the gold is unalloyed, 15% is alloyed with bismuth. The average gold grain size is 5 micron.

Mineral List


28 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

Neoproterozoic
541 - 1000 Ma
Neoproterozoic intrusive and metamorphic terranes

Age: Neoproterozoic (541 - 1000 Ma)

Description: Damara Supergroup

Comments: Mixtures of metamorphic and intrusive or plutonic rocks, tracts known as crystalline, migmatitic terranes, moderately to highly metamorphosed rocks of unknown origin with or without intrusions. This classification is inherently prone to variable interpretation, as other compilers might distinguish some packages by their metamorphic or gneissic protoliths, and the associated age ranges may be more variable.

Lithology: Intrusive and metamorphic terranes

Reference: Geological Survey of Canada. Generalized geological map of the world and linked databases. doi:10.4095/195142. Open File 2915d. [18]

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

Nörtemann, M. F. J., Mücke, A., Weber, K., & Meinert, L. D. (2000). Mineralogy of the Navachab skarn deposit, Namibia: an unusual Au-bearing skarn in high-grade metamorphic rocks. Communications of the Geological Survey of Namibia, 12, 149-156.

Cairncross, B. (2004) Field Guide To Rocks & Minerals Of Southern Africa, 119.

Von Bezing, L., Bode, R., and Jahn, S., (2008) Namibia Minerals and Localities. Edition Schloss Freudenstein, Bode Verlag GmbH, Haltern. (in English).

Dziggel, A., Wulff, K., Kolb, J., and Meyer, F.M. (2009) Processes of high-T fluid–rock interaction during gold mineralization in carbonate-bearing metasediments, the Navachab gold deposit, Namibia. Mineralium Deposita 44, 665-687.

Vollgger, S. A., Cruden, A. R., Ailleres, L., & Cowan, E. J. (2015). Regional dome evolution and its control on ore-grade distribution: Insights from 3D implicit modelling of the Navachab gold deposit, Namibia. Ore Geology Reviews, 69, 268-284.

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