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Aerial Radiometric Reconnaissance (ARR) data packages for 124 selected 1-degree-by-2-degree NTMS quadrangles and Hydrogeochemical and Stream Sediment Reconnaissance (HSSR) data packages for 94 priority quadrangles were prepared and delivered to Bendix Field Engineering Corporation for use by NURE quadrangle evaluation teams. Copies of the ARR maps and HSSR data books will be placed on file at the Bendix Field Engineering Corporation Technical Library in Grand Junction, Colorado. Additional studies were performed to investigate environmental influences on the sensitivity of aerial gamma-ray spectrometer surveys and on the apparent surface geochemical behavior of uranium, thorium, and potassium. Results reported by Norwine, et al., (1979) indicated that the sensitivities of aerial gamma-ray measurements, as compared with measurements on fresh rocks, decreased by as much as factors of 3 to 5 in very humid climates, apparently due to surface leaching of the elements or daughters and soil-moisture or vegetation absorption of the gamma radiation. Results of studies aimed at finding possible quantitative relationships between the ARR data or the HSSR data parameters for whole quadrangles and uranium resources in the quadrangles are summarized. Workable relationships were discovered that allow the radiometric and geochemical data in the conterminous United States to be used to predictmore » uranium inventories in tons of U/sub 3/O/sub 8/ for comparison with US Department of Energy estimates for that quantity. In Alaska, it was possible to relate the regional aerial radiometric data to uranium potential measured in terms of numbers of significant local high uranium anomalies.« less |
