Explore the geometry of Sierrita Copper Mine, Pima County,
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Sierrita Copper Mine
Sierrita is an open pit metals mine and concentrator, with molybdenum by-products
located 20 miles southwest of Tucson,
near Green Valley, Arizona. It is one
of the safest mines in the United
States, having earned the federal
government’s prestigious ‘Sentinels of
Safety’ award as the safest open-pit
mine in the open-pit hard-rock mine
category in 1993, 1997, 1999 and 2001.
In addition to copper and molybdenum,
the mine produces rhenium, a rare and
highly valued metal.
First claims recorded in 1895. First worked as an underground mine beginning in 1907; open-pit development began in 1957. Sierrita became part of the Phelps Dodge mining portfolio in 1999 and a part of Freeport-McMoRan in 2007.
Freeport McMoRan Copper & Gold Inc.
FCX is a leading international mining company with headquarters in Phoenix, Arizona. FCX operates large, long-lived, geographically diverse assets with significant proven and probable reserves of copper, gold and molybdenum. FCX has a dynamic portfolio of operating, expansion and growth projects in the copper industry and is the world’s largest producer of molybdenum.
Freeport-McMoRan Copper & Gold Inc., (FMCG, NYSE: FCX) often called simply Freeport, is the world's lowest-cost copper producer and one of the world's largest producers of gold. It was formerly based in New Orleans, Louisiana but moved its headquarters to Phoenix, Arizona, after acquiring copper producer Phelps Dodge in 2007. In addition to Phelps Dodge, its subsidiaries include PT Freeport Indonesia, PT Irja Eastern Minerals and Atlantic Copper, S.A. Freeport is the largest publicly traded copper and molybdenum producer in the world.