Freeport-McMoRan, Rio Tinto and BHP are among the miners testing sulfide leaching as tariff threats send copper prices soaring.

Arizonans can still weigh in on the Copper Creek exploratory project. The Bureau of Land Management’s public comment period ...

The Morenci mine looked like the Sarlacc monster ... U.S. Treasurer Romana Acosta Bañuelos — were born in Arizona mining towns or traced their lineage there. I share those roots.

The North America Copper Mines segment operates open-pit copper mines in Morenci, Bagdad, Safford, Sierrita, Miami in Arizona and Chino, and Tyrone in New Mexico. The South America Operations ...

(Bloomberg) — Carved into a mountain range in Arizona’s Sonoran Desert ... investors than greenlight new complexes. Morenci is the largest copper mine in North America — about the size ...