“…A detailed and extensive geophysical mapping, using gravity and magnetics, is reported for two new IOCG mineral systems in the Archaean São Francisco Craton, Brazil, in the Vale do Curaçá and Riacho do Pontal copper districts (Hühn et al [5]). Several high-density (3.13 g/cm 3 ) and high magnetic susceptibility (SI > 0.005) areas are identified corresponding to the Caraíba, Surubim, Vermelho, and other minor copper deposits.…”