Curiously, I have no difficulty accepting these dates here. This area saw the first true humans working themselves up beginning around 50,000 years ago. Hematite and the associated minerals all worked for these early peoples. They were not smelting and at best they worked free gold when possible.
Local claims may in fact be totally correct in assigning the mines to the Khoisan. These are peoples from those early times who have lived in an environment that did not bring newcomers easily.
We have observed that from other sources, the end of Eden occurred close by around 45,000 years ago. Prior to that mankind had lived and worked to mine gold in South Africa from 200,000 BP to 45,000 BP. At least that is what has been claimed from cultural sources. We have filled in some of the blanks and established some of the how. At least enough to avoid discounting the cultural claims.
Thus the survivors would be expected to mine resources easily enough and quickly.
The Edinburgh Geologist
Issue no 42