An open pit mine located 48 km north of Otjiwarango. Part of an alkaline igneous-carbonatite ring dike complex where fluorite has replaced pegmatitic carbonatite.
The Early-Cretaceous alkaline rocks/sövite complex intruded Late Precambrian Damara series (quartzites, marbles and biotite schists). The metasedimentary rocks have been fenitized in the vicinity of the intrusion. Fluorite also replaces host-rocks (marbles and biotite schists).
REE-bearing minerals occur in beforsitic carbonatite dikes and carbonate-fluorite-bearing metasomatites. Their HREE content is significant.
References:- Mineral. Record: 20(5):396
- Kogut, A. I., Hagni, R. D. & Schneider, G. I. C. (1998): Geology, mineralogy, and paragenetic sequence of the Okorusu carbonatite-related fluorite ores, Namibia. In: Ed. Hagni, R. D., Proc. 9th Quadrenn. IAGOD Symp., 1994, 555-573.
- Rustemeyer, P. (2000): Okosuru: Fundstelle attraktiver Fluorite in Namibia. Lapis 25(3), 24-29, 50.
- Orris, G.J., and Grauch, R.I. (2002): Rare earth element mines, deposits, and occurrences. USGS Open-File Report 02-189.
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http://www.tms.org/pubs/journals/JOM/0004/Hagni-0004.html
34 entries listed. 21 valid minerals.
