Mass-balance constraints on formation of cenozoic gold placers and implication for the origin of Witwatersrand gold deposits Gisements alluviaux d'or = Alluvial gold placers = Yacimientos aluviales de oro Loen, J.S. PLACER OR METALLOGENIE MODELISATION GITOLOGIE BASSIN VERSANT BILAN DE MASSE ORSTOM /Hérail, Gérard (ed.) /Fornari, Michel (ed.) 1991 text https://www.documentation.ird.fr/hor/fdi:36210 fdi:36210 Loen J.S., . Mass-balance constraints on formation of cenozoic gold placers and implication for the origin of Witwatersrand gold deposits. In : Hérail Gérard (ed.), Fornari Michel (ed.), . Gisements alluviaux d'or = Alluvial gold placers = Yacimientos aluviales de oro ORSTOM, ). 1991, 247-259 Symposium International sur les Gisements Alluviaux d'Or, La Paz (BOL), 1991/06/03-05 EN AFRIQUE DU SUD