Marmato

Phase: Operations
Mine Type: Underground

Tags: argillic alteration arsenopyrite chalcopyrite electrum marmatite potassic alteration propylitic alteration pyrrhotite sphalerite

Mineralization:

The deposit mainly comprises sulfide-rich veinlets and veins composed of minor quartz, carbonate, pyrite, arsenopyrite, Fe-rich sphalerite (i.e. marmatite), pyrrhotite, chalcopyrite and electrum in the epithermal upper zone, and quartz, pyrrhotite, chalcopyrite, bismuth sulfide and telluride minerals and free gold in the mesothermal lower zone. Pervasive early propylitic alteration is over-printed principally by phyllic and intermediate argillic alteration related to the gold mineralized veins of low to intermediate sulfidation epithermal type, with weak and patchy potassic (biotite) alteration at depth.