Transition and sulphide composites are sulphide refractory.
All composites leached ≥97% when pre-treated via pressure oxidation (POX)
POX-CIL yielded the highest overall gold leaching
Oxidization of the refractory composites successfully recovers more than 90% of the gold.
Cut Off Au g/t | Category | Tonnes | Au g/t | Au Ounces | |
Oxide | 0.15 | Indicated | 52,030,000 | 0.39 | 657,000 |
Oxide | 0.15 | Inferred | 18,187,000 | 0.47 | 272,000 |
Oxide composite leaches very well under conventional whole ore cyanidation by carbon in leach (CIL)
Cut Off Au g/t | Category | Tonnes | Au g/t | Au Ounces | |
Primary | 0.45 | Indicated | 407,544,000 | 0.92 | 12,011,000 |
Primary | 0.45 | Inferred | 282,303,000 | 0.85 | 7,736,000 |