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Navachab Gold Mine, Karibib District, Erongo Region, Namibia

Gold
Navachab Gold Mine, Karibib District, Erongo Region, Namibia

Photo: Rob Lavinsky
Latitude: 21°58'51"S
Longitude: 15°45'55"E
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

Actinolite
Anorthite
'Apatite'
Arsenopyrite
Beryl
'Biotite'
Bismuth
Bismuthinite
Calcite
Chalcopyrite
Clinozoisite
Diopside
Fluorite
'Garnet'
Gold
Graphite
Hedenbergite
'K Feldspar'
Maldonite
Molybdenite
Muscovite
Pyrite
Pyrrhotite
Quartz
Scheelite
Sphalerite
Talc
Titanite
'Tourmaline'
Tremolite


30 entries listed. 25 valid minerals.

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References

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.

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Copyright © Jolyon Ralph and Ida Chau 1993-2014. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of thousands of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
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