District with several copper mines some 80km northeast of Windhoek. The Onganja mine is the most significant mineral deposit in a group of quartz-calcite-copper-molybdenum veins that extend over an area of 40km situated in the upper catchment basin of the Swakop River. Copper prospect & mines are found on farms Asgard 192, Otjiterazu West 67, Midgard 191, Okatjemisse 68, Otjisonjati 69, Okamuvia 144, Helen 235, Onganja West 71 & Klein Onganja 148. The Onganja mine is situated on Helen 235 & in the past ownership changed several times & was also known as Emke, Emka & Otjisongati.
The Onganja mine is situated on the Voitskopf vein which is continuous with the Maygift vein straddling the border between farms Helen 235 & Klein Onganja 148. Other veins in the immediate vicinity are Omahanga, Kronriff, Feldspatriff, Stanley, Kriegsfeldgang & several alphabetical veins A, B, E, F, G, H, L, N, all the veins are grouped as the Onganja mining area. Mineral specimens of cuprite & native copper came mostly from the Voitskopf-Maygift vein system.
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References
- Cairncross, B. & Moir, S. (1996): The Onganja mining district, Namibia. The Mineralogical Record 27: 85-97.
- Bezing, L. von, Bode, R. & Jahn, S. (2007): Namibia. Minerals and Localities. Edition Schloss Freudenstein, Bode Verlag, Haltern, 372 pp. (in English)
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