OFR 97-492: Raleigh Quadrangle NURE HSSR Study
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[See History of NURE HSSR Program for a summary of the entire program.]
Subcontractors for the Savannah River Laboratory (SRL) collected at least 6,666 stream-sediment, 295 surface-water, and 5,778 ground-water samples within 100 counties from North Carolina as part of the NURE Hydrogeochemical and Stream Sediment Reconnaissance (HSSR) program. The sediment samples were collected during June - December 1976; July - August 1977; and April - May 1978, and water samples were collected during December 1976 - August 1977 and June - July 1978. Sample coverage included portions of the Beaufort, Charlotte, Chattanooga, Currituck Sound, Florence, Georgetown, Greensboro, Greenville, Johnson City, Knoxville, Manteo, Norfolk, Raleigh, Rocky Mount, Rome, Spartanburg, and Winston-Salem 1:250,000-scale quadrangles. (A total of 1,219 stream-sediment, 124 surface-water, and 906 ground-water samples were collected within the Raleigh quadrangle.) These samples were sent to SRL for analysis of uranium and additional elements (16 in sediments and 9 in waters). SRL was able to analyze 6,597 sediments and 6,040 waters from North Carolina; this includes 1,213 sediment and 1,030 water samples from the Raleigh quadrangle. The analytical and site location data for all North Carolina samples were released in the North and South Carolina Data Report [GJBX-102(82)].
SRL sent 4,677 sediment samples from North Carolina to an unnamed contract laboratory for "Supplemental Analyses." Supplemental analytical determinations for up to 23 elements were reported for 4,660 of these samples in the North and South Carolina Data Report [GJBX-102(82)]. The digital data file accompanying this report include Supplemental Analyses for 1,149 North Carolina sediment samples within the Raleigh quadrangle. (Records for eight of the Raleigh sediment samples in this report did not actually have any supplemental analysis data).
SRL: Raleigh Quadrangle
SRL released a separate report, which includes data for 1,199 stream-sediment, 124 surface-water, and 905 ground-water samples, as the Raleigh Quadrangle GJBX-233(81) Data Report. The site coding information for this data set is summarized within the text of this report. SRL also included the data for supplemental analysis of the stream sediment samples within this report. However, these data for the Raleigh quadrangle were not found in digital format and are not included in the Raleigh digital data file presented here. The hard copy of this data is available in the [GJBX-233(81)] data release. A preliminary comparison of the [GJBX-233(81)] data suggests that, there are some differences between this set of quadrangle data and that found for corresponding samples in the North Carolina State report. One difference is that some data found in the digital state files are missing in the published quadrangle tables. The abstract within this report stated that 907 ground-water samples with analyses were listed in the data tables, but only 905 were actually found.
Data for gold analyses of sediments by SRL neutron activation were released in the GJBX-135(82) summary report. The introduction of that report states:
"This report contains previously unreported neutron-activation analyses of gold in sediment samples determined at SRL. These data were not included in the standard SRL NURE data reports because the gold spectrum was not measured in the original analytical procedure and the report format was designed without the gold analyses being included. Gold analyses became available as the analytical procedure was refined, but the report format was not modified to incorporate these data."
Only those sediment samples that had detectable concentrations of gold by neutron activation analysis were given in the GJBX-135(82) report. Sediment samples with concentrations below detection limits were not reported and can only be ascertained by identifying which samples were actually analyzed by neutron activation at SRL.
Because of the various laboratories and analytical methods used, some SRL samples may have been analyzed once, twice, or not at all. The following table summarizes the analysis of Raleigh quadrangle samples.
|Only Supplemental Lab||6||0|
|Both SRL and Supplemental Labs||1,143||0|
|Total Data Records||1,219||1,030|
The following is a list of all sediment and water sample types collected and reported for NURE studies in the Raleigh quadrangle.
|Sediment Sample Type||Number of Samples||Water Sample Type||Number of Samples|
|Total Sediments||1,219||Total Waters||1,030|
These Raleigh quadrangle samples were analyzed by one or more of the following methods:
The Raleigh quadrangle sediment data consist of reformatted records from the North Carolina portion of the North and South Carolina [GJBX-102(82)] Data Report. The following problems were found and addressed during the comparison and reformatting stages for the Raleigh quadrangle sediment data:
The Raleigh quadrangle water data consist of reformatted records from the North Carolina portion of the North and South Carolina [GJBX-102(82)] Data Report. The following problems were found and addressed during the comparison and reformatting stages for the Greensboro quadrangle water 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 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).
Raleigh Quadrangle Sediment Data - 1,219 records
Raleigh Quadrangle Water Data - 1,030 records
In the eastern United States, SRL collected samples primarily by county. Often, not all counties within a quadrangle were completely sampled. Sample coverage in the Raleigh quadrangle is complete and includes samples from Alamance, Anson, Chatham, Cumberland, Duplin, Durham, Franklin, Guilford, Harnett, Hoke, Johnston, Lee, Montgomery, Moore, Nash, Orange, Randolph, Richmond, Sampson, Scotland, Wake, Wayne, and Wilson Counties in North Carolina. The laboratory and analytical methods used also may vary by county such that adjacent counties often have very different analytical coverage.
Spruce Pine, Moore, and Johnston Areas Orientation Study
SRL conducted an orientation study in the Spruce Pine, Moore, and Johnston Areas in North Carolina in preparation for HSSR data collection in North Carolina [GJBX-17(78)]. This area occupies parts of the Knoxville and Raleigh 1:250,000-scale quadrangles. A total of 298 surface sites and 210 ground water sites were sampled over an 1,800 square-mile area. Data tables of analytical results are included within the report. No digital data files were available for reformatting.
Wadesboro Triassic Basin Detailed Study
The University of North Carolina at Wilmington, under subcontract to Savannah River Laboratory, conducted a preliminary study of the Wadesboro Triassic Basin, North Carolina, to evaluate the potential for uranium deposits [GJBX-32(82)]. This area occupies parts of the Charlotte, Florence, Raleigh, and Spartanburg 1:250,000-scale quadrangles. A total of 216 gamma-ray spectrometric measurements were taken at 165 sites in the Wadesboro Basin and at 37 sites in the adjacent Piedmont. Data tables of analytical results are included within the report. No digital data files were available for reformatting.
Characteristics of the Southeastern Piedmont
Bendix Field Engineering Corporation released a report that contains stream-sediment, hydrogeochemical, and aeromagnetic data for 16 contiguous NTMS quadrangles in the eastern United States [GJBX-40(83)]. This compilation report is limited in scope to features that have specific interest to the geoscience community. Included in the report are aeromagnetic and geochemical maps, and tectonic and igneous rock distribution maps. When used together, these maps show geochemical, tectonic, and magnetic features unique to many of the geologic and physiographic provinces in the region. This report primarily covers the Southeastern Piedmont region and includes the Athens, Augusta, Bluefield, Charlotte, Florence, Georgetown, Greensboro, Greenville, Knoxville, Norfolk, Raleigh, Richmond, Roanoke, Rocky Mount, Spartanburg and Winston-Salem 1:250,000-scale quadrangles. The color maps are in 35mm-slide format. No digital data files accompany this report.
Geology and Mineral Resources Study
A report on the geology and mineral resources of the Raleigh quadrangle was prepared for the Savannah River Laboratory [GJBX-51(78)]. No geochemical data accompany this report.
North America and Africa Plutonic Rocks Special Study
The SRL in contract with the Department of Geology of the University of North Carolina conducted a special study to investigate the association of uranium deposits with granitic source or host rocks. The analytical results from 441 samples of 92 plutons were released in the North America and Africa Plutonic Rocks Special Study GJBX-221(82) report. See the North America and Africa Plutonic Rocks Special Study for the data and a more detailed description of this study. Plutons that were apparently sampled in the Raleigh quadrangle include the Farrington (7 samples).
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Home Page: USGS National Geochemical Database - NURE HSSR data
Page written by Bryan G. Moravec and Steven M. Smith.
Contact: Steven M. Smith (email@example.com)
Version 1.30: September 11, 2001
Version 1.41: February 23, 2006
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