Nababeep tungsten mines, Okiep Copper District, Namaqualand, Northern Cape Province, South Africa

Tungsten deposits in a horizon of migmatitic high-grade metapelites in the so-called Wolfram formation (or Wolfram mine schist formation) below a granite sheet. The schist horizon can be traced over a length of several kilometers, giving the mineralization the appearance of a stratabound deposit.

References:
- Raith, J.G., and Stein, H.J. (2000): Re-Os dating and sulphur isotope composition of molybdenite from tungsten deposits in western Namaqualand, South Africa: implications for ore genesis and the timing of metamorphism. Mineralium Deposita 35, 741-753.