2007) from publication: Evaluation of risk of rock fall accidents in gold ...on June 17 Carletonville SA. Phone: +27 64 608 5399. 3.What made South African mining viable was a new technique using cyanidation called the MacArthur Forrest process patented in 1887. By 1898 South African gold output had expanded to 118 tons (3.8 million oz)
