Violence at South African mines causes uncertainty in the industry . Last year , thousands of striking workers halted operations at many of the country 's mines . In December , Harmony Gold cited security concerns for its decision to suspend operations in its Kusasalethu mine , about 100 kilometers west of Johannesburg . Strike - related violence at Botswana 's Marikana mine in 2008 left 44 dead . The violence has prompted some investors to look at alternative options .
Violence at South African mines causes uncertainty in the industry . Last year , thousands of striking workers halted operations at many of the country 's mines . Strike - related violence at Botswana 's Marikana mine in 2008 left 44 dead . The violence has prompted some investors to look at alternative options .