The good news about Prestea ores, which will be treated over the next 5 to 6 years, is that its coarse, free-milling gold
has less arsenopyrite content.
The percentage of recovery was over 95% (w/w), which complies with the recovery rate expected for a free-milling gold
ore (see figure 1).
Gold is associated with sphalerite and pyrite, and is typically identified visually as free-milling gold
within quartz or at the margins of sulfide crystals.
The M1 South underground will kick-off WAFs mining development at Sanbrado, with the underground development accessing high-grade, free-milling gold
mineralisation located directly beneath the proposed M1 South open pit at approximately 120m vertical.