Gunnison Copper (TSX:GCU,OTCQB:EXMGF) is shifting its development strategy for the Gunnison copper project in Arizona, US, laying out plans for a conventional open-pit and heap-leaching operation. In ...

Equivalent Mill Copper Grade of 0.83% for the First Five Years of Milling and 0.58% for the First Twenty Years of Milling Payable Copper and Gold Production is Estimated to be 4.4 billion Pounds (2.0 ...

Arizona needs to strengthen aquifer-protection requirements for the massive proposed Copper World mine to guard against groundwater pollution beneath it, Pima County officials say. The county ...

Faster gains in mining output may come from improving recovery on existing leach pads rather than building new supply.

- Drill hole BRT-DDH045: 384 m @ 0.22% Cu from 4 m, including 94 m @ 0.33% Cu from 30 m. - Infill drilling underway to allow for a maiden mineral resource estimate ahead of a PFS. - A 2,800 kg bulk ...

Near Noordover, in the south of Namibia. An updated preliminary economic assessment (PEA) has shown the project to be amenable to bioheap-leaching. The PEA envisages a life-of-mine of 24 years and a ...

BHP Billiton has applied for government approval to build a demonstration-scale heap leaching plant at its Olympic Dam mine, as the company looks for more economical ways of expanding the South ...

More copper produced - yet less water sucked from the aquifer, less pollution, less juice needed to power the mine and mill, and fewer trucks on the road. Rosemont Copper now predicts that scenario ...

The Santa Cruz project is located on about 6 000 acres of 100%-owned private surface, mineral and associated water rights, in ...