George Ogilvie of Arizona Sonoran Copper joined us for his corporate editorial comments on the first preliminary results form Rio Tinto's Nuton technology. Primary sulphide extraction ranges from 61% to 82% based on 5 columns, including 2 early cycle columns returning 83% and 61%, 2 mid-cycle columns above 70% and 1 with lower extraction based on biotite content. Nuton is currently reassessing the additives for this low extraction column to address future biotite exposure, which accounts for approximately 1-2% of the Cactus West deposit in the primary zone.
