Encouraging oxide leach recovery for copper & gold at Kharmagtai
Upscaled column leach tests, as well as heap leach engineering design work are in progress.
- Upscaled column leach tests, as well as heap leach engineering design work are in progress.
- Recent column leaching tests completed on the mineralised oxide portion of the Kharmagtai Mineral Resource Estimate (MRE) delivered promising metallurgical extraction, peaking at 93% copper and 46% gold.
- It comprises acid leach to recover and remove cyanide soluble copper, followed by GlyCatTM, which involves a glycine leach to neutralise acid, followed by cyanide leach to recover gold and silver.
- These are referenced as follows:
several composite samples collected from White Hill, Stockwork Hill and Copper Hill deposits, and classified as follows: GOX (Green Oxide), SOX (Strong Oxide) and ROX (Red Oxide).