[See History of NURE HSSR Program for a summary of the entire program.]
Totals of 749 sediment and 751 water samples were collected from 752 locations in the Ketchikan quadrangle as part of the Los Alamos Scientific Laboratory (LASL) Ketchikan Quadrangle NURE Hydrogeochemical and Stream Sediment Reconnaissance (HSSR) study. Samples were collected during September of 1979. The sediment samples were analyzed by LASL for uranium and up to 43 additional elements, but LASL was unable to complete the Ketchikan quadrangle data release report. The sediment data were sent to and released by the Bendix Field Engineering Corporation in Grand Junction, Colorado only as a microfiche GJBX-381(81) report. This report does not give any details on the sample collection or analytical methods used on these samples.
LASL sent the 751 water samples from the Ketchikan quadrangle to the Oak Ridge Gaseous Diffusion Plant (ORGDP) for analysis. These samples were analyzed for uranium and up to 27 additional elements and the results were released by ORGDP in the GJBX-222(81) report.
The following is a list of NURE sample types collected within the Ketchikan quadrangle.
Sediment Sample Type | Number of Samples | Water Sample Type | Number of Samples |
---|---|---|---|
Wet Streams | 457 | Streams | 457 |
Wet Lakes | 292 | Lakes | 294 |
Total Sediments | 749 | Total Waters | 751 |
These Ketchikan quadrangle samples were analyzed by one or more of the following methods:
Sediment Samples
Water Samples
The data in the NEW-FORMAT NURE data files consist of 749 reformatted sediment records from the GJBX-381(81) report and 751 reformatted water records from the GJBX-222(81) report. Any changes in the data or problems found are noted in the REFORMAT comment field.
The data files are in dBase IV .dbf format. A complete description of the data fields and coding schemes is available online - On-Line Manual for New-Format NURE HSSR Data Files. The data are transferred as gzip .gz compressed files. Simply activate the links below to download the data files. Use gunzip or popular commercial and shareware decompression programs to expand the .gz files. Additional information and executable versions of gzip and gunzip for various systems are available on the gzip home page. If you experience trouble downloading files, try pressing the shift key when clicking (Netscape for Windows), or right-clicking (Internet Explorer for Windows), or pressing the option key when clicking (Netscape and Internet Explorer for Macintosh).
Ketchikan Quadrangle Sediment Data - ketchk_s.dbf.gz
(125 Kb compressed / 1.9 Mb uncompressed)
Ketchikan Quadrangle Water Data - ketchk_w.dbf.gz
(75 Kb compressed / 1.8 Mb uncompressed)
Water samples from this quadrangle are reported to have been acidified with nitric acid but NOT filtered in the field.
The ORGDP fluorometric procedure for uranium required each water sample to be centrifuged before taking an aliquot for analysis. It is not clear whether water samples analyzed by emission spectrometry were also centrifuged prior to analysis.
LASL compiled all of the regional HSSR data from Alaskan NURE studies and produced a report [GJBX-32(83] that graphically displays the distribution of selected elements for most of the State. No additional geochemical data were released with this report.
D'Andrea, R.F., Jr., Zinkl, R.J., Shettel, D.L., Jr., Langfeldt, S.L., Hardy, L.C., Minor, M.M., McInteer, C., Hansel, J.N., and Broxton, D.E., 1981, Uranium hydrogeochemical and stream sediment reconnaissance of the Ketchikan NTMS quadrangle, Alaska: Bendix Field Engineering Corporation, U.S. Department of Energy, Grand Junction, Colo., GJBX-381(81), 104 p.
Uranium Resource Evaluation Project, 1981, Hydrogeochemical and stream sediment reconnaissance basic data for Ketchikan quadrangle, Alaska: Union Carbide Corporation, Nuclear Division, Oak Ridge Gaseous Diffusion Plant, Oak Ridge, Tenn., K/UR-330, U.S. Department of Energy, Grand Junction, Colo., GJBX-222(81), 84 p.
Weaver, T.A., Freeman, S.H., Broxton, D.E., Bolivar, S.L., and others, 1983, The geochemical atlas of Alaska: Los Alamos National Laboratory, Los Alamos, N.M., LA-9897-MS, U.S. Department of Energy, Grand Junction, Colo., GJBX-32(83), 57 p.
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