Mariana Minerals, led by CEO Turner Caldwell, is operating what it says is the world’s first autonomous mine, extracting and refining copper in Utah to meet surging demand for the costly metal.

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SALT LAKE CITY — On a windy Monday afternoon, a copper mine in southeastern Utah resumed production after resting dormant since 2024. Its reboot marks a significant step toward using artificial ...

A dormant copper smelter in Hayden, Arizona, may reopen after its parent company, Grupo Mexico, announced plans to expand production. The smelter, once a top polluter, was designated an EPA Superfund ...

LISBON VALLEY, Utah — A ceremonial dynamite blast launched operations at Mariana Minerals' new Copper One Mine in San Juan County. The blast signified the reopening of the old Lisbon Valley Mine, ...

LIMA, April 28 (Reuters) - China's Zijin Mining Group is seeking new ‌opportunities in Peru as it prepares to invest about $1.5 billion to expand its La Arena mine and increase copper production in ...

PT Freeport Indonesia said its giant Grasberg copper mine may return to full production in early 2028, as the company continues its protracted recovery from an accident last year. The complex in ...

A hearing will likely have lawmakers sparring over copper projects in states like Minnesota and Arizona. Republican Rep. Pete Stauber is teeing up a debate in the House this week around the need for ...

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PHOENIX (AZFamily) — Three groups filed a notice of their intent this week to sue the two federal agencies over the Copper Creek Exploration Project near Mammoth, Arizona. The Center for Biological ...

A U.S. appeals court has temporarily blocked the transfer of federal forest land in Arizona to a pair of international companies that plan to mine one of the largest copper deposits in North America.