Postmasburg and its adjacent areas of South Africa is major producer of which of the following minerals?

1. A

   Uranium

   (a) Uranium. South African uranium is associated with the Witwatersrand gold reefs, not primarily Postmasburg.

2. B

   Bauxite

   (b) Bauxite. Postmasburg is not a world bauxite district (those are Guinea, Australia, Jamaica).

3. C

   Manganese

   (c) Manganese. Postmasburg and the nearby Kalahari manganese field of South Africa are a major manganese province. That mineral is the official key.

4. D

   Mica

   (d) Mica. India (Kodarma–Nellore) is the classic mica belt, not Postmasburg.

Summary. Official key is (c). Postmasburg and adjoining South Africa produce manganese. Uranium, bauxite and mica are not that field’s headline mineral.