Lead isotopes link copper artefacts from .
A plot of lead isotope ratios from the Klein Aub mine (Walraven and Borg, 1992, ... T.M. Evers, R.P. Van den BergAncient mining in southern Africa, with reference to a copper mine in the harmony block, north-eastern transvaal. J. S. Afr. Inst. Min. Metall, 74 (6) (1974), pp. . Google Scholar. Faure and Mensing, 2005. G. Faure, T.M. MensingIsotopes: Principles and Applications. John ...