Metallurgy

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