Rio has faced a 12-year permitting battle to develop the Resolution mine, which could meet 25% of US domestic copper needs.

Arizona Sonoran Copper Company Inc. an emerging U.S. copper developer, is pleased to highlight the significant progress made ...

Mining in Arizona:In the 'Copper State,' growing demand for ore raises fears in the fragile Sky Islands Copper World's developers envision at least four open pits across more than 4,000 acres in ...

Mining in Arizona: In the 'Copper State,' growing demand for ore raises fears in the fragile Sky Islands Copper World's ...