OFR 97-492: Talkeetna Quadrangle NURE HSSR Study
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>> Pubs Warehouse > OF 97-492 > State Coverage > Alaska NURE data > Talkeetna Quadrangle
[See History of NURE HSSR Program for a summary of the entire program.]
Totals of 563 sediment and 621 water samples were collected at 623 locations in the Talkeetna 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-123(79) report.
The following is a list of sample types collected for the Talkeetna quadrangle study.
| Sediment Sample Type | Number of Samples | Water Sample Type | Number of Samples |
|---|---|---|---|
| Wet Streams | 163 | Streams | 171 |
| Wet Lakes | 399 | Lakes | 450 |
| Dry Lakes | 1 | ||
| Total Sediments | 563 | Total Waters | 621 |
These Talkeetna 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 reformatted records from the GJBX-123(79) report. Any problems found during the reformatting process are noted in the REFORMAT comment field.
Values for dissolved oxygen in 410 samples were added from the GJBX-123(79) report and can be found in the O_DISS field.
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).
Talkeetna Quadrangle Sediment Data - 563 records
Talkeetna Quadrangle Water Data - 621 records
Water samples from this quadrangle are reported to have been acidified with nitric acid but NOT filtered in the field.
A summary evaluation report was prepared for the Talkeetna quadrangle by C.C. Hawley and Associates of Anchorage, Alaska [PGJ/F-058(82)]. Additional samples of 814 stream sediments, 7 soils, 361 rocks, 4 waters, and 5 panned concentrates were collected in the quadrangle to "identify geologic environments favorable for the occurrence of uranium deposits." All of the stream sediments, rocks, and panned concentrates were analyzed for uranium oxide by fluorometry. The water samples were analyzed for uranium oxide and 4 other constituents, and the soils for uranium oxide by unspecified methods. Out of these samples, 69 stream sediments, 33 rocks, 4 soils, and 1 panned concentrate were analyzed for 29 additional elements by a spectrographic method, and 7 of the rock samples also underwent gamma spectrometry for eK, eU, and eTh. 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-123(79) Talkeetna 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 Talkeetna quadrangle can be found in the GJBX-123(79) quadrangle report and in the NEW-FORMAT NURE data files as noted above.
The second GJBX-138(82) study was "an analysis of the potential for uranium occurrences in and associated with the Tertiary granitic plutons of the area." The "granitic matrix" used in the study consisted of 49 sediment samples that were located downstream from 6 granitic plutons in the Mount McKinley and Talkeetna quadrangles. The study consisted of factor, correlation, and cluster analyses to investigate the mineral associations and occurrences in the 6 granitic plutons. Partial chemical analyses for 13 of the samples can be found in Table B-IV, and complete analytical results for all 49 samples can be found in Appendix B-II. These sediment samples were previously published in the Mount McKinley and Talkeetna quadrangle reports. Sediment samples from the Talkeetna quadrangle can be found in the GJBX-123(79) 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.
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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