OFR 97-492: Ashland Quadrangle NURE HSSR Study
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[See History of NURE HSSR Program for a summary of the entire program.]
ORGDP: Ashland Quadrangle
A total of 375 stream-sediment and 312 ground-water samples was collected from the Ashland quadrangle as part of the Oak Ridge Gaseous Diffusion Plant (ORGDP) Ashland Quadrangle NURE Hydrogeochemical and Stream Sediment Reconnaissance (HSSR) study. Personnel from ORGDP collected all stream-sediment samples between July and September of 1978. Ground-water samples were collected between June and September of 1978. Sampling of ground water in the Wisconsin portion of the quadrangle was performed, under contract, by personnel of the Wisconsin Geological Survey and Natural History Survey. Ground water samples in Minnesota and Michigan were collected by ORGDP personnel. All samples were analyzed by the ORGDP for uranium and other elements. The analytical data were released as the Ashland Quadrangle NURE HSSR study GJBX-61(79) report.
Summary Tables
The following is a listing of the sample types collected for the Ashland quadrangle study.
Sediment Sample Type | Number of Samples | Water Sample Type | Number of Samples |
---|---|---|---|
Wet Streams | 356 | Wells | 309 |
Dry Streams | 19 | Springs | 3 |
Total Sediments | 375 | Total Waters | 312 |
These Ashland quadrangle samples were analyzed by one or more of the following methods:
Sediment Samples
Water Samples
The Ashland quadrangle sediment and water data consist of reformatted records from the Ashland Quadrangle NURE HSSR study GJBX-61(79) report. The following problems were found and addressed during the comparison and reformatting stages for these data:
Sediment Records
Water Records
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 web sites, 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).
Ashland Quadrangle Sediment Data - 374 records
Ashland Quadrangle Water Data - 312 records
The water samples were reportedly collected in the field without any filtering or acidification. (See the SAMPTYP coding explanation in the On-Line Manual for USGS-Reformatted NURE HSSR Data Files for descriptions of different Sample Types). However, the samples were filtered later in the laboratory through a 0.45 micron membrane filter before analysis. Therefore, the samples were not true "untreated water" samples and the analytical data may not be directly comparable for other quadrangle water samples of the same SAMPTYP when collected by a different laboratory. Since this was the standard procedure for Oak Ridge, water data from other Oak Ridge quadrangles should be comparable. (Note that two well water samples in the Ashland quadrangle were actually filtered in the field. These data may or may not be directly comparable to other well water data in the quadrangle.
Latitude-longitude coordinates were reported in the original data files, as decimal degrees, to only 3 decimal places. Therefore, the precision of these coordinates is limited to +/- 0.001 degrees or +/- 3.6 seconds. This translates to a minimum precision of +/- 365 feet (111 m) for latitude values and between +/- 259 feet (79 m) to +/- 235 feet (72 m) for longitude values (calculated at latitudes of 45° and 50°N, respectively.)
Ashland Quadrangle NURE Summary
An additional evaluation of the Ashland quadrangle was conducted by Derry, Michener, and Booth (DMB) under subcontract to Bendix Field Engineering Corporation [PGJ/F-084(82)]. Totals of 165 lake sediment, 120 rock, 16 stream water, 359 stream sediment, and 184 ground water samples were collected within the boundaries of the Ashland quadrangle. All of these samples were analyzed by fluorometry for uranium. The lake sediments were also analyzed for As, Cu, Mo, Ni, Pb, Se, Zn, and V. These data were released only as appendices on microfiche accompanying the summary report. The results of this study suggest that there are no areas within the quadrangle that are favorable for uranium mineralization, although slightly anomalous radioactivity has been detected from aerial radiometric surveys of the area.
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Frequently Asked Questions Concerning NURE HSSR Data
Home Page: USGS National Geochemical Database - NURE HSSR data
Page written by Bryan G. Moravec 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 1.41: February 23, 2006
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