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Publication Extents

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Reconnaissance for radioactive deposits in the lower Yukon-Kuskokwim Highlands region, Alaska
M.G. White, P.L. Killeen
1953, Circular 255
Investigations in 1947 in the Lower Yukon-Kuskokwim region, Alaska found that previously reported radioactivity in the vicinity of Flat is due to uraniferous zircon, an accessory mineral in monzonite. The monzonite intrudes mafic igneous and Upper Cretaceous sedimentary rocks. The maximum equivalent-uranium content of the zircon is 0.14 percent, and...
Preliminary report on the Comet area, Jefferson County, Montana
George Earle Becraft
1953, Circular 277
Several radioactivity anomalies and a few specimens of sooty pitchblende and other uranium minerals have been found on the mine dumps of formerly productive base- and precious-metal mines along the Comet-Gray Eagle shear zone in the Comet area in southwestern Montana. The shear zone is from 50 to 200 feet...