A federal judge in Phoenix issued a temporary injunction on Monday that blocks a copper mine land swap in Arizona as lawsuits proceed.

The Department of Environment Quality will conduct an environmental assessment and open the plan up for public comment by end ...

The US Forest Service was temporarily barred from transferring land to Rio Tinto Corp. for a copper mine in Arizona Monday ...

Montana Resources plans a 100-foot height increase for the Yankee Doodle Tailings Impoundment to extend copper mining in ...

Rio Tinto will commence work under a revised mine plan at the Oyu Tolgoi copper-gold operation in Mongolia, with the mine’s ...

A U.S. district judge in Arizona has precluded the U.S. Forest Service from proceeding with the land exchange for the huge ...

Federal officials are requesting public comment on a proposed copper mine near Yucca, where mining activity last occurred more than 50 years ago.

Under the amended agreement, the Company has access to a Credit Facility of $650 million with an additional uncommitted accordion of up to $200 million, for a total availability of up to $850 million.

A federal judge laid out a timeline for the government to advance a contentious land exchange and copper mine but didn't halt ...

With three drill rigs turning, Waratah Minerals is ramping up exploration at its Spur gold-copper project, an emerging ...

A federal judge in Arizona temporarily halted the Oak Flat land exchange today while two lawsuits challenging the exchange proceed. Without today’s injunction, the public lands about 40 miles east of ...