High fences shield the Silverbell Mine, owned by the Asarco subsidiary of Grupo Mexico, just northwest of Tucson. From the ...

Hudbay Minerals’ (TSX, NYSE: HBM) proposed 85,000-tonne-per-year Copper World project in Arizona is now fully permitted for development after receiving all three key state-level permits.

Rio Tinto (ASX, LON, NYSE: RIO) said on Wednesday it is very optimistic about US President Donald Trump granting it the final permits for its long-delayed Resolution copper project in Arizona.