The Sierrita Mine, southwest of Tucson, is currently the only internal U.S. source of rhenium, a metal used by the aerospace industry
William Ascarza Special to the Arizona Daily Star Arizona has the distinction of many mine sites that have diverse geology and mineralogy.
People are also reading… Milled onsite, the Sierrita Mine is currently the only internal U.S. source of rhenium, a metal used by the aerospace industry as a superalloy in jet and industrial gas turbine engines. Noted for its heat and corrosion resistance, rhenium adds longer engine life coupled with higher performance and operational efficiency as noted in its usage in high-octane lead-free gasoline.
While not notable for production, the Evening Star Mine located in the Big Horn Mining district in Maricopa County is renowned for many rare mineral discoveries including the rare lead chromate mineral phoenicochroite along with fornacite, a rare lead, copper chromate arsenate hydroxide mineral and wickenburgite, a secondary lead mineral formed from the oxidation of lead ores.
The Mistake Mine, a 21-acre lode claim located in the Box Canyon Mining district in Yavapai County, is notable for its ramsdellite mineral specimens. Ramsdellite is a rare manganese oxide formed in veins and bedded manganese deposits. Discovered in 1954, this former surface and underground manganese mining operation property is currently overseen by the Bureau of Land Management.
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