Ref.: Cousins, C.A. (1973) Platinoids of the Witwatersrand system. Journal of the South African Institute of Mining and Metallurgy: 73: 184-199.
MacLean, P.J. and Fleet, M.E. (1989) Detrital pyrite in the Witwatersrand gold fields of South Africa: evidence from truncated growth banding. Economic Geology: 84: 2008-2011.
Fleet, M.E. (1998a) Detrital pyrite in Witwatersrand gold reefs: X-ray diffraction evidence and implications for atmospheric evolution. Terra Nova: 10: 302-306.
The Witwatersrand is a large basin of metamorphosed conglomerates that forms the greatest gold field in the world. It stretches for 350 km long by 200 km wide with a thickness that can excede 10,000m. The mines have reached depths of 3600m. It occurs in several provinces of South Africa.