Geology and uranium deposits of the Carrizo Mountains area, Apache County, Arizona and San Juan County, New Mexico
Although uranium was first discovered in the Carrizo Mountains area in 1919, the ores were not developed until 1942. They have, however, been mined continuously since 1948. Formations in the area range from the Permian Cutler formation through the Cretaceous Mancos shale, and all are intruded by a dioritic laccolith and its related dikes. The older structures, which include the Defiance Uplift, the San Juan Basin, and the Four Corners Platform are somewhat disrupted by the effects of the intrusion. A number of mines are described, and mineralogical and geochemical studies made are outlined. The ...
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