Mining has played a significant role in the history of Pinal County. Early mining dates back more than 1,000 years, as Native Americans mined chrysocolla using large diabase hammers for jewelry and ...

Oyu Tolgoi, in the Umnugovi province of Mongolia, is one of the largest known copper and gold deposits in the world. It is also one of the most modern, safe and sustainable operations in the world.

Oyu Tolgoi is one of the largest known copper and gold deposits in the world. It is also one of the most modern, safe and sustainable operations in the world Oyu Tolgoi, in the Umnugovi province of ...

VANCOUVER - The operator of the Red Chris gold and copper mine in northwestern B.C. says it is applying safety lessons learned from a collapse last year that trapped three workers to a planned ...

The British Columbia government has approved an amended environment assessment certificate for block-caving at the Red Chris Mine, the same site where three workers were trapped last July. The copper ...

Macomb County is about to pour $11.5 million into a major underground fix along 15 Mile Road, lining roughly 1.5 miles of the 15 Mile interceptor in a bid to head off future sinkholes and stretch the ...

Operating since 1903, Rio Tinto’s Kennecott Mine near Salt Lake City remains one of the most productive mines in the world, where workers pulled 134,000 metric tons of copper from the earth last year, ...