The Gunnison copper project, in southern Arizona, is performing better than planned, with the initial copper recovery grades exceeding feasibility study expectations, TSX- and FSE-listed Excelsior Mining reported on Wednesday.
Pregnant leach solution grade is currently measuring 0.15 g/ℓ copper in the primary recovery pond – a milestone that Excelsior achieved ahead of schedule and keeps the project on pace for copper production this quarter.