Color copies of photomicrograph figures that accompany a report studying uranium in granites in the southwestern United States.

This report is an issue of the original draft copy of the "Interim Staff Report on Uranium Exploration on the Colorado Plateau", dated June 1951. The original draft copy was only recently located and is being published at this time because of the interest in the contained historical content.

From summary: In this first annual report for subcontract BFEC 79-384-E (Uranium in Granites of Southwestern North America) we have established the general geological and geochemical background for our investigations. We describe the regional setting and some important geochemical patterns, constituting a major uranium anomaly, of the Precambrian basement in the Colorado Plateau region. Three of our investigated samples were derived from a portion of this region in central and northern Arizona. We describe the tectonic and petrologic setting for a fourth sample, a granite from the young (Cretaceous) Peninsular Ranges Batholith of southern California.

From abstract: This geologic study of Kettle dome, northeast Washington, encompasses an area of approximately 800 square miles (2048 sq km). The evaluation of uranium occurrences associated with the igneous and metamorphic rocks of the dome and the determination of the relationship between uranium mineralization and stratigraphic, structural, and metamorphic features of the dome are the principal objectives. Evaluation of the validity of a gneiss dome model is a specific objective. The principal sources of data are detailed geologic mapping, surface radiometric surveys, and chemical analyses of rock samples.

From abstract: "A literature study was conducted on the geology of the Southern Piedmont province of the states of Maryland, Virginia, North Carolina, South Carolina, and Georgia. The purpose was to identify geologic areas potentially suitable for containment of a repository for the long-term isolation of solidified radioactive waste."