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Excelsior working out Gunnison ISR teething issues

Excelsior Mining believes it has found a solution to deal with the secondary calcite formed at with the copper oxides in the fracture system at its Gunnison in-situ recovery (ISR) copper leach operation in Arizona, USA.

Excelsior working out Gunnison ISR teething issues Excelsior working out Gunnison ISR teething issues Excelsior working out Gunnison ISR teething issues Excelsior working out Gunnison ISR teething issues Excelsior working out Gunnison ISR teething issues

Excelsior Mining's Gunnison project in Arizona, USA

The company views the calcite as a short-term problem as it will be dissolved, however its reaction with the acid injected to create CO2 has been an unexpected issue which has restricted injection