National uranium resource evaluation: Douglas Quadrangle, Arizona and New Mexico

The Douglas 1/sup 0/ x 2/sup 0/ Quadrangle, New Mexico and Arizona, was evaluated to identify environments and delineate areas favorable for the occurrence of uranium deposits. Criteria used were formulated for the National Uranium Resource Evaluation program. Evidence for the evaluation was drawn from surface studies and rock sampling, hydrogeochemical and stream-sediment reconnaissance sampling, and aerial radiometric surveys. The quadrangle is in the Mexican Highlands of the Basin and Range physiographic province. Environments favorable for uranium deposits inlude magmatic-hydrothermal uranium deposits in Precambrian and Paleozoic rocks intruded by granitic stocks of Jurassic age in the Warren mining district; magmatic-hydrothermal uranium deposits in sandstones and permeable limestones of the U-bar and Majoda Formations of Cretaceous age in the Sierra Rica-Hachita Valley-Little Hatchet Mountains; and hydroauthigenic and hydroallogenic uranium deposits in highly differentiated effusive volcanic and volcaniclastic rocks associated with the Turkey Creek cauldron.