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Publication Extents

Not all publications have extents, not all extents are completely accurate
Lead-alpha age determinations of granitic rocks from Alaska
John J. Matzko, H.W. Jaffe, C. L. Waring
1957, Trace Elements Investigations 618
Lead-alpha activity age determinations were made on zircon from seven granitic rocks of central and southeastern Alaska. The results of the age determinations indicate two periods of igneous intrusion, one about 95 million years ago, during the Cretaceous period, and another about 53 million years ago, during the early part...
Summary of reconnaissance for uranium in Alaska, 1955
John J. Matzko, Val L. Freeman
1957, Trace Elements Investigations 617
Reconnaissance for uranium in Alaska during 1955 included airborne radiometric traverses, examination of radioactivity anomalies found during the airborne traverses, examination of prospector leads, and examination of areas that seems geologically favorable for the occurrence of uranium. The airborne radiometric traverses in central Alaska revealed 33 anomalies considered worth examining....
Reconnaissance for uranium and thorium in Alaska, 1954
John J. Matzko, Robert G. Bates
1957, Trace Elements Investigations 611
During 1954 reconnaissance investigations to locate minable deposits of uranium and thorium in Alaska were unsuccessful. Areas examined, from which prospectors had submitted radioactive samples, include Cap Yakataga, Kodiak Island, and Shirley Lake. Unconcentrated gravels from the beach at Cape Yakataga average about 0.001 percent equivalent uranium. Uranothorianite has been...
Distribution of elements in the Salt Wash member of the Morrison Formation in the Jo Dandy area, Montrose County, Colorado
William L. Newman, Donald P. Elston
1957, Trace Elements Investigations 607
A study of the distribution of elements in the Salt Wash member of the Morrison formation of Jurassic age from samples taken in the Jo Dandy area, Montrose County, Colo., was made to determine average chemical composition of mudstone and sandstone and to determine the magnitude of variations in concentrations...
Photogeologic maps of the Iris SE and Doyleville SW quadrangles, Saguache County, Colorado
Kathleen McQueen
1957, Trace Elements Memorandum 984
The Iris SE and Doyleville SW quadrangles, Saguache County, Colorado include part ot the Cochetopa mining district. Photogeologic maps of these quadrangles show the distribution of sedimentary rocks of Jurassic and Cretaceous age; precambrian granite, schist, and gneiss; and igneous rocks of Tertiary age. Sedimentary rocks lie on an...
Results of U.S. Geological Survey exploration for uranium-vanadium deposits in the Club Mesa area, Uravan district, Montrose County, Colorado
Robert L. Boardman, Linus R. Litsey, Howard E. Bowers
1957, Trace Elements Memorandum 979
Between 1948 and 1953, the U. S. Geological Survey conducted diamond-drill exploration in the Club Mesa. area in the western part of the Uravan district, Montrose County, Colo. This drilling, consisting of 662 holes totaling 170,095 feet, was done to find minable uranium-vanadium deposits and to appraise uranium-vanadium reserves of...
Electrical properties of sandstones of the Morrison Formation
George Vernon Keller
1957, Trace Elements Investigations 592
The electrical properties of the Morrison formation in the Uravan mineral belt of the Colorado Plateau have been studied to determine if there are anomalous variations in these properties in and near zones of uranium-vanadium minerals which might serve as a target for geophysical prospecting. Measurements of electrical properties of...