Espigão Copper-Gold Polymetallic Project

Since 2007, more than 200,000 t of manganese oxide concentrates have been produced. A characteristic of the concentrates is that they have elevated copper (an average of > 0. 2% Cu to a peak of 0.8%Cu), and variable concentrations of other base metals (in places to percent levels). The chemical variations are consistent with partitioning processing in a large-scale hydrothermal system. Potential exploration analogues include Kitumba-type IOCG system, or intrusive system (several examples of which have a history of high-grade manganese production from Cu-anomalous vein systems).