Sierrita Mine

The Sierrita Mine is a large copper mine located in the Sierrita Mountains of Arizona, in the southwestern part of the United States. Sierrita was operated by Phelps Dodge until 2007 when it was acquired by Freeport-McMoRan. The mine represents one of the largest copper reserves in the United States and in the world. The deposit had estimated reserves (in 2006) of 907 million metric tons of ore grading 0.26% copper and 0.03% molybdenum along with additional 2.4 billion tons at 0.21% copper and 0.02% molybdenum.

Contents

• Plans announced to close sierrita mine
• Freeport cutting 430 jobs at sierrita mine
• References

The mine is located in southern Pima County, southwest of Tucson and west of Green Valley-Sahuarita.