Rep. Walt Blackman this week urged the US Forest Service to approve a land swap to allow a massive copper mine near Superior ...

A major collapse at a key new section of Codelco’s biggest mine is raising questions about the Chilean behemoth’s ability to ...

A federal judge will hear arguments in a case over a disputed land exchange that would allow construction of a huge copper mine.

President Donald Trump’s plan to slap a 50% tariff on copper imports is exposing the tangled web of regulations that ...

Arizona is at the heart of the U.S. race to produce more copper domestically, and a planned mine in Casa Grande is clearing ...

U.S. copper prices are trading at records ahead of the 50% tariff that the president has promised to impose on imports.

Rescue teams found a body inside a section of a Chilean copper mine that collapsed two days earlier during a moderate ...

Copper rose as much as 1.1% on the London Metal Exchange, with trading conditions starting to settle after the White House’s ...