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| Author | : National Uranium Resource Evaluation Program |
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| Release | : 1976-07 |
| Genre | : Geochemical prospecting |
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| Author | : National Uranium Resource Evaluation Program |
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| Total Pages | : 24 |
| Release | : 1979-04 |
| Genre | : Geochemical prospecting |
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| Author | : National Uranium Resource Evaluation Program |
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| Total Pages | : 34 |
| Release | : 1978 |
| Genre | : Geochemical prospecting |
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| Author | : National Uranium Resource Evaluation Program |
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| Total Pages | : 34 |
| Release | : 1977-04 |
| Genre | : Geochemical prospecting |
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| Author | : Wayne A. Morris |
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| Total Pages | : 20 |
| Release | : 1977 |
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| Author | : |
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| Total Pages | : 248 |
| Release | : 1976 |
| Genre | : Geochemical prospecting |
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| Author | : National Uranium Resource Evaluation Program |
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| Total Pages | : 56 |
| Release | : 197? |
| Genre | : Geochemical prospecting |
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| Release | : 1976 |
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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).
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| Release | : 1978 |
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The modifications to the Los Alamos Scientific Laboratory (LASL) Hydrogeochemical and Stream Sediment Reconnaissance (HSSR) program, necessary to incorporate the expansion and revision of the overall HSSR program as required by the Department of Energy, have been completed. To date, approximately 57% of the total area assigned to the LASL in the Rocky Mountain region and Alaska has been sampled and plans are well under way to sample an additional 28% during FY 78. Contracts have been let to complete the sampling of the LASL area in the lower states and bids to sample an additional 33% of Alaska are being evaluated. Twenty reports (2 in press and 18 in preparation) are presently scheduled to be open filed within six months, reporting uranium data only for 18 complete quadrangles and multielement data for 11 complete quadrangles. In addition, data releases are being prepared to open file the uranium data from portions of 13 quadrangles that are now outside the LASL reporting boundary but which had been sampled by the LASL prior to the establishment of the new boundary in October 1977. By the end of the quarter, all multielement analysis systems were operational. Water samples from 7780 locations and sediment samples from 4170 locations were analyzed for uranium. Samples from approximately 6500 locations were analyzed by one or more of the multielement methods.
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| Release | : 1979 |
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During this six-month period, Hydrogeochemical and Stream Sediment Reconnaissance samples were collected by the Los Alamos Scientific Laboratory (LASL) from 623 locations in Colorado for a special study. Additional special studies are planned for nine other areas in the Rocky Mountain states in fiscal year 1979, plus some cleanup reconnaissance sampling in parts of four quadrangles that overlap state borders. Preparations for reconnaissance sampling of the entire North Slope region of Alaska have been made but sampling is contingent upon receiving supplemental funds. Water samples from 6725 locations were analyzed for uranium by fluorometry or delayed-neutron counting (DNC). Water samples from 9390 locations were analyzed by emission spectroscopy for 12 other elements. Sediment samples from 14,414 locations were analyzed for uranium and 31 other elements by combined DNC and neutron activation analysis. Sediment samples from 9876 locations were analyzed for two additional elements by x-ray fluorescence. Nine LASL reconnaissance reports, one pilot study data release, one supplemental multielement data release, a multielement data release for three areas in western Alaska, and one quarterly report were open filed by the Department of Energy, Grand Junction Office during the six-month period. Numerous other reports are in various stages of completion and several will be open filed in the near future.
