Arizona features many mines with diverse geology, mineralogy
The Arizona Daily Star’s William Askal The Special Arizona has many mining sites with diverse geology and mineralogy. Located 20 miles southwest of Tucson, the Sielita Mine, now operated by Freeport McMorran, is one of the world’s largest copper-molybdenum mining operations. Originally explored in 1895, it was not until 60 years later that Harrison Schmidt […]
