Summary of Uranium Exploration in the Lukachukai Mountains, Apache County, Arizona 1950 to 1955
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the U.S. AEC carried out an exploration program of reconnaissance and drilling in the Lukachukai Mountains, Apache County, Arizona, from September 1950, until August 1955. Uranium ore was found within a 50-foot unit of the Salt Wash member of the Harrison formation, approximately 45 feet above the Salt Wash-Bluff contact. Radioactivity of the ore deposits in the Lukachukai Mountains is in equilibrium and the ore minerals are secondary in origin, principally carnotite and tyuyamunite.