Rössing Uranium Mine, Arandis, Swakopmund District, Erongo Region, Namibia
|Latitude & Longitude (WGS84):||22° 28' 41'' South , 15° 3' 35'' East|
|Latitude & Longitude (decimal):||-22.47806,15.06000|
A huge open pit uranium mine owned by Rio Tinto Zinc Corp. (46.5%) & Industrial Development Corp. of South Africa (13%) & 4 others.
The deposit was discovered in 1928. The mine was producing an estimated 4,000 tons per year (1982 thru 1984); from 2002-2006 the production ranged from about 2,400 to 3,800 t of U3O8 per year. The lifetime of the mine is expected to extend beyond 2020 (situation in 2007).
The mine is worked for uranium minerals (uraninite, betafite and secondary U-minerals) in leucogranite sheets. Granites in the Rössing Uranium Mine SJ area are dominated by sheeted leucogranites that intruded into weak zones such as faults and shear zones and preferentially at the Khan/Rössing metasedimentary formations.
Located in the Namib Desert area south of Arandis, about 70 km north-east of Swakopmund, near the town Arandis.
1. Spectacular specimens of bright orange, acicular boltwoodite crystals, which have been on the market during the last 25-30 years, were first labelled as coming from a "Boltwoodite locality near Arandis", and later from "Rössing" and thus confused with the Rössing Uranium mine in the area (which never produced any boltwoodite specimens). The correct locality is Goanikontes see http://www.mindat.org/loc-7864.html
2. Milarite labeled "Rössing" has not been found at this locality but in a pegmatite in Rössing Mountains Area see http://www.mindat.org/loc-221312.html
Also see the discussion on the messageboard: http://www.mindat.org/mesg-7-173021.html
Note on the mineral list: the spinel and clinohumite (both in marble) may come from a locality near Rössing.
45 valid minerals.
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
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. 
Zambezi Resources Limited (2006) Progress Report on Oryx (Uranium Project).
Kinnaird, J.A., and Nex, P.A.M., (2007) A review of geological controls on uranium mineralisation in sheeted leucogranites within the Damara Orogen, Namibia. Trans. Inst. Min. Metall. B, Applied Earth Science, V. 116, pp. 68-85.
Abraham, I.M. (2009) Geology and spatial distribution of uranium mineralisation in the SK anomaly area, Rossing area, Namibia. Master thesis University of the Witwatersrand.