Affiliation: | School of Geosciences, Private Bag 3,;University of the Witwatersrand, WITS, 2050, South Africa Geological Survey of Norway, Leiv Eirikssonsvei 39, N-7491;Trondheim;and Institute for Petroleum Technology and Applied Geophysics, NTNU, N-7491 Trondheim, Norway. E-mail: Geological Survey of Norway, Leiv Eirikssonsvei 39, N-7491;Trondheim, Norway Anglo Platinum, PO Box 62179,;Marshalltown, 2107, South Africa |