...). The bulk of the Witwatersrand ore in the Klerksdorp goldfield, processed at the AngloGold Ashanti Great Noligwa treatment plant, is derived from the Vaal Reef (>90%), with a comparatively small contribution obtained from the Crystalkop Reef (or C-Reef). Despite the uneven contribution, it is of critical...

... arsenopyrite grain. ( D ) Rounded to sub-rounded uraninite (Ur) grains occurring with rounded detrital pyrite (RDP) and anhedral epigenetic pyrite (EPI-2). The main economic gold- and uranium-bearing conglomerate mined in the Klerksdorp goldfield is the Vaal Reef, which is located within the Central...

...T. Utter Abstract The morphology of the gold from the Proterozoic auriferous and uraniferous sediments of the Upper Witwatersrand and Ventersdorp Systems of the Klerksdorp gold field (South Africa) was studied by means of scanning electron microscopy. Three morphological types of gold could...

... and caused serious damage estimated at US$24 million, with 12 mortalities and many more injured. Others include six mining related tremors which caused significant damage i.e. Welkom 1976, Klerksdorp 1977, Welkom 1989 and Carletonville 1992 seismic events. Notable for their damage to infrastructure...

...Figure 14. ( A ) Channelised Outer Basin Reefs 1-4 near Klerksdorp (after Watchorn, 1981 ). ( B ) Buffelsdoorn Reef (Outer Basin Reef No. 5) overlain by orthoquartzites of the Koedoeslaagte Formation near Klerksdorp (after Watchorn, 1981 ). ( C ) Striped quartzites of the Babrosco Formation...

... in the cluster networks. To continue improving the earthquake locations it is necessary that new velocity models are determined for each cluster region (Central and East Rand - CERAND, the Klerksdorp – Orkney – Stilfontein – Hartebeesfontein – KOSH and the Far West and West Rand - WRAND). The availability...