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Totals of 502 sediment and 575 water samples were collected at 575 locations in the Tyonek quadrangle using standardized field procedures developed by the Los Alamos Scientific Laboratory (LASL) during July and August of 1977 as part of the Hydrogeochemical and Stream Sediment Reconnaissance (HSSR) phase. LASL analyzed the samples for uranium and other elements (42 additional elements in sediments and 12 additional elements in waters), and released the data in the GJBX-29(79) report.

The following is a list of sample types collected for the Tyonek quadrangle study.

These Tyonek quadrangle samples were analyzed by one or more of the following methods:

Sediment Samples

• LA1: Los Alamos Delayed-Neutron Counting Analysis of sediments for U.
• LA2: Los Alamos Energy Dispersive X-Ray Fluorescence Analysis of sediments for Ag, Bi, Cd, Cu, Nb, Ni, Pb, Sn, and W.
• LA4: Los Alamos Arc-Source Emission Spectrography Analysis of sediments for Be and Li.
• LA5: Los Alamos Neutron Activation Analysis of sediments for Al, Au, Ba, Ca, Ce, Cl, Co, Cr, Cs, Dy, Eu, Fe, Hf, K, La, Lu, Mg, Mn, Na, Rb, Sb, Sc, Sm, Sr, Ta, Tb, Th, Ti, V, Yb, and Zn.

Water Samples

• LA6-FL: Los Alamos Fluorometry Analysis of waters for U.
• LA7: Los Alamos Plasma-Source Emission Spectrography Analysis of waters for Ca, Co, Cr, Cu, Fe, Mg, Mn, Mo, Ni, Pb, Ti, and Zn.

Composition of the NEW-FORMAT NURE Data Files

The data in the NEW-FORMAT NURE data files consist of reformatted records from the GJBX-29(79) report. Any problems found during the reformatting process are noted in the REFORMAT comment field.

Values for dissolved oxygen in 480 samples were added from the GJBX-29(79) report and can be found in the O_DISS field.

Download The Data

The NURE HSSR data are now available online in two databases: The sediment database (also includes data for soils and some rocks) at http://tin.er.usgs.gov/nure/sediment/ and the water database at http://tin.er.usgs.gov/nure/water/. From these two websites, NURE HSSR data can be selected, examined, summarized, and downloaded by political boundaries (State and County), by quadrangle (1:250,000-scale, 1:100,000-scale, and 1:63,360-scale for Alaska or 1:24,000-scale for the Lower 48 States), and by hydrologic unit (drainage region, subregion, river basin, or sub-basin). Selected data can be downloaded as a dBase file, a shapefile, an HTML table, or ASCII text (tab- or comma-delimited).

Tyonek Quadrangle Sediment Data - 502 records
Tyonek Quadrangle Water Data - 575 records

Notes for Data Users

Water samples from this quadrangle are reported to have been acidified with nitric acid but NOT filtered in the field.

Other NURE Geochemical Data for the Tyonek Quadrangle

A summary evaluation report was prepared for the Tyonek quadrangle by C.C. Hawley and Associates of Anchorage, Alaska [PGJ/F-059(82)]. Additional samples of 441 stream sediments, 141 rocks, 8 waters, and 2 panned concentrates were collected in the quadrangle to "identify geologic environments favorable for the occurrence of uranium deposits." All of the stream sediment and rock samples were analyzed for uranium oxide by fluorometry. Fifteen of the rock samples and 51 of the stream sediment samples were analyzed for 29 additional elements by semi-quantitative emission spectrography, and 7 of the rock samples also underwent gamma spectrometry for eK, eU, and eTh. The water samples were analyzed for uranium oxide and 4 other constituents, and the panned concentrates for uranium oxide and Th by unspecified methods. These data were released only as microfiche appendices accompanying the summary report.

Three statistical analyses of HSSR data that were performed by personnel from LASL and Bendix Field Engineering Corporation of Grand Junction, Colorado were published in the GJBX-138(82) report. The study was conducted within parts of the Mount McKinley, Talkeetna, and Tyonek quadrangles. The first GJBX-138(82) study was based on 683 LASL stream and lake sediment samples from all three quadrangles and included samples from the GJBX-29(79) Tyonek quadrangle report. "The data were analyzed by multielement correlation and factor analyses on raw data and log-transformed data" to identify mineral associations and occurrences within the study area. The specific samples used in the study were plotted on a plate accompanying the GJBX-138(82) report. No data for geochemical analyses were included in the report. Sediment samples from the Tyonek quadrangle can be found in the GJBX-29(79) quadrangle report and in the NEW-FORMAT NURE data files as noted above.

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.

Tyonek Quadrangle NURE Bibliography

• Beyth, M., McInteer, C., Averett, W.R., and Stablein, N.K., 1982a, Analysis of hydrogeochemical and stream sediment reconnaissance data for the Alaska Project Matrix: in Three applications of hydrogeochemical and stream sediment reconnaissance data interpretation for a selected region in south-central Alaska: Los Alamos Scientific Laboratory informal report LA-8465-MS, Los Alamos, N.M., U.S. Department of Energy, Grand Junction, Colo., GJBX-138(82), p. A1-A25.
• Beyth, M., McInteer, C., Averett, W.R., and Stablein, N.K., 1982b, Evaluation of potential for uranium mineral occurrences in Tertiary granitic plutons of the Alaska Range: in Three applications of hydrogeochemical and stream sediment reconnaissance data interpretation for a selected region in south-central Alaska: Los Alamos Scientific Laboratory informal report LA-8465-MS, Los Alamos, N.M., U.S. Department of Energy, Grand Junction, Colo., GJBX-138(82), p. B1-B54.
• Beyth, M., McInteer, C., Averett, W.R., and Stablein, N.K., 1982c, Indications of a uranium-nickel-copper association in the Mt. McKinley Area: in Three applications of hydrogeochemical and stream sediment reconnaissance data interpretation for a selected region in south-central Alaska: Los Alamos Scientific Laboratory informal report LA-8465-MS, Los Alamos, N.M., U.S. Department of Energy, Grand Junction, Colo., GJBX-138(82), p. C1-C6.
• Jacobsen, S.I., Aamodt, P.L., and Sharp, R.R., Jr., 1979, Uranium hydrogeochemical and stream sediment reconnaissance of the Lime Hills and Tyonek NTMS quadrangles, Alaska, including concentrations of forty-three additional elements: Los Alamos Scientific Laboratory informal report LA-7348-MS, Los Alamos, N.M., U.S. Department of Energy, Grand Junction, Colo., GJBX-29(79), 224 p.
• Manning, K.H., and Hinderman, T.K., 1982, National Uranium Resource Evaluation, Tyonek quadrangle, Alaska: C.C. Hawley and Associates, Inc., U.S. Department of Energy, Grand Junction, Colo., PGJ/F-059(82), 17 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.

Links Within Open-File Report 97-492

Back to Alaska NURE data
Frequently Asked Questions Concerning NURE HSSR Data
Home Page: USGS National Geochemical Database - NURE HSSR data

Page written by Andrew W. Holt and Steven M. Smith
Contact: Steven M. Smith (smsmith@usgs.gov)
Version 1.10: July 29, 1999
Version 1.20: August 07, 2000
Version 1.30: September 11, 2001
Version 1.40: January 13, 2006

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U.S. Department of the Interior | U.S. Geological Survey URL: https://pubsdata.usgs.gov/pubs/of/1997/ofr-97-0492/quad_ak/q_tyonek.htm Questions or Assistance: USGS Web Contact Page Last Modified: Wed Dec 7 16:18 EDT 2016