National Uranium Resource Evaluation: Black River Quadrangle, Alaska

The Black River Quadrangle, Alaska, was evaluated to identify and delineate areas that have environments favorable for uranium deposits by conducting geochemical and aerial radiometric surveys and by making local detailed surface geologic studies. The favorability determinations were based on criteria developed for the National Uranium Resource Evaluation program. No uranium concentrations were found in the quadrangle, and none of the geologic environments meet favorability criteria. The Cenozoic basins of the region contain continental Tertiary sediments that could host uranium deposits, but they remain unevaluated because of their cover of water-saturated Quaternary alluvium which commonly precludes the use of surface exploration methods.