 | | Journal (article/letter/editorial) | | Mineralogyof Platinum-Group Mineralsin the Witwatersrand,SouthAfrica CLIVE E. FEATHE• Abstract Approximately80...platinum-groupmineral grains in the Precambrian Witwatersrand conglomerate reefs are (Ir, Os, Ru) alloys....nearly all the Pt present. Hollingworthite, iridarsenite, and ruthenarseniteoccurin variable quantities(1-5%)... Platinum-Group Minerals Identified in the Witwatersrand Concentrate and Estimates of Their Average Relative...The platinum-groupminerals identified in the Witwatersrand 1. Osmium 2. Iridosmine 3. Osmiridium 4. 5 |  | | Journal (issue) | | Mowry Place Tucson, AZ 85741 Articles Gold in South Africa ..............................................Afrikaans University P.O. Box 524 Johannesburg 2000 South Africa Carl R. Anhaeusser Economic Geology Research...O. Wits 2050 Johannesburg South Africa Gold has been mined in South Africa fo r over a century. Most...has been won from conglomerate reefs o f the Witwatersrand goldfields, where production from individual...INTRODUCTION Gold was mined in pre-European times in South Africa by the indigenous tribes. Most of the gold was |
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