The Geology and Production History of the Black Rock Point Nos. 1 and 3 Uranium-Vanadium Mines, Apache County, Arizona

The Black Rock Point Nos. 1 and 3 uranium-vanadium mines are in the northwestern Carrizo Mountains, Apache County, Arizona (Figure 1). The mines were on Navajo Tribal Mining Permits, issued to Thomas Clani of Teec Nos Pos, Arizona. This report is the result of a review of material, in the author’s personal files, which was acquired in the 1950s when he examined the uranium-vanadium mines in the northwestern Carrizo Mountains. The mines are named for a nearby feature of the northwestern Carrizo Mountains, Black Rock Point (Figure 1). Here, a 400-ft-thick diorite sill, of Tertiary age, has intruded the Cretaceous Mancos Shale. This feature is also known as Chezhindeza Mesa, Navajo for lava (Young and Morgan, 1942).V1.01 was uploaded on 21 April 2014. The new version contains 2 minor grammatical changes and a minor change to the Figure 2 caption.Documents in the AZGS Documents Repository collection are made available by the Arizona Geological Survey (AZGS) and the University Libraries at the University of Arizona. For more information about items in this collection, please contact azgs-info@email.arizona.edu)