Download or read book National Uranium Resource Evaluation Program (NURE) Hydrogeochemical and Stream Sediment Survey Program in the Eastern United States written by and published by . This book was released on 1976 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The Savannah River Laboratory has the responsibility for hydrogeochemical and stream sediment reconnaissance surveys of 25 Eastern States in ERDA's National Uranium Resource Evaluation (NURE) program. Equipment developed for field collection, filtration (at 40 psig), absorption spectrum measurements, and ion exchange concentrations of geochemical samples was built into a 30-pound backpack. Hundredfold concentration of water-soluble species is provided by the portable ion exchange equipment. A neutron activation facility has been developed with a natural U detection limit of 0.6 ppb in 10 ml of aqueous solution and a U/Th discrimination ratio of 600:1. Preliminary data from a central Georgia study area indicate that U concentrations increase with decreasing grain size of bottom sediments, but that the finer grain sizes may not define a given source as well as coarser grain sizes. U concentrations in stream water averaged 30 parts per trillion. In the same streams, the 40 to 100 mesh bottom sediment averaged 13 ppm U, the 100 to 200 mesh sediment average 48 ppm U, and the -200 mesh material averaged 96 ppm U.U content of suspended solids filtered from the streams averaged 4.6 ppm. (auth).