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Oklahoma
Subcontractors for the Savannah River Laboratory (SRL) collected at least 2,493 stream-sediment, 2,751 ground-water, and 375 stream-water samples within 24 counties of the eastern portion of Oklahoma as part of the NURE Hydrogeochemical and Stream Sediment Reconnaissance (HSSR) program. The sampling effort was completed between May and October of 1978 and included portions of the Ardmore, Enid, Fort Smith, McAlester, Oklahoma City, Sherman, Texarkana, and Tulsa 1:250,000-scale quadrangles. (A total of 652 stream-sediment, 103 surface-water, and 699 ground-water samples were collected within the McAlester quadrangle.) These samples were sent to SRL for analysis of uranium and 16 additional elements. SRL was able to analyze only 879 Oklahoma stream-sediment samples and all 3126 Oklahoma water samples; this includes 257 stream-sediment and all 802 water samples from the McAlester quadrangle. The analytical and site location data for all Oklahoma sediment and water samples were released as separate files in the Arkansas, Louisiana, Mississippi, Missouri, Oklahoma, and Texas Data Report [GJBX-104(82)].

Arkansas
Subcontractors for the Savannah River Laboratory (SRL) collected at least 3,292 stream-sediment, 5,121 ground-water, and 1,711 stream-water samples within 43 counties of central Arkansas as part of the NURE Hydrogeochemical and Stream Sediment Reconnaissance (HSSR) program. The sampling effort was completed between May and October of 1978 and included portions of the El Dorado, Fort Smith, Greenwood, Harrison, Helena, Little Rock, McAlester, Memphis, Poplar Bluff, Russellville, Texarkana, and Tulsa 1:250,000-scale quadrangles. (A total of 189 stream-sediment, 35 surface-water, and 245 ground-water water samples were collected within the McAlester quadrangle.) These samples were sent to SRL for analysis of uranium and 16 additional elements. SRL was able to analyze only 2,416 Arkansas stream-sediment samples and 6,831 Arkansas water samples; this includes 172 stream-sediment and all 280 water samples from the McAlester quadrangle. The analytical and site location data for all Arkansas sediment and water samples were released as separate files in the Arkansas, Louisiana, Mississippi, Missouri, Oklahoma, and Texas Data Report [GJBX-104(82)].

SRL: McAlester Quadrangle
SRL did not release a separate report for the McAlester quadrangle.

ORGDP: Ardmore, McAlester, Little Rock, and Helena Quadrangles
SRL sent several Oklahoma and Arkansas sediment samples to the Oak Ridge Gaseous Diffusion Plant (ORGDP) for analysis of uranium and 31 additional elements. ORGDP released the analytical data for 639 samples in the Ardmore, McAlester, Little Rock, and Helena Quadrangles GJBX-70(82) Data Report. This report includes data for 444 sediment samples from the McAlester quadrangle. The site coding information for this data set was summarized in the GJBX-51(82) report.

Gold Analyses
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.

Summary Tables
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 McAlester quadrangle samples.

The following is a list of all sample types collected and reported for NURE studies in the McAlester quadrangle.

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

Sediment Samples

• SR1: Savannah River Neutron Activation Analysis - Neutron Counting of sediments for U.
• SR2: Savannah River Neutron Activation Analysis of sediments for Al, Ce, Dy, Eu, Fe, Hf, La, Lu, Mn, Na, Sc, Sm, Th, Ti, V, and Yb. (Note: Au values were reported later for this method.)
• OR2: Oak Ridge Neutron Activation Analysis of sediments for U.
• OR7: Oak Ridge Emission Spectrochemical Analysis of sediments for Ag, Al, B, Ba, Be, Ca, Ce, Co, Cr, Cu, Fe, Hf, K, La, Li, Mg, Mn, Mo, Na, Nb, Ni, P, Pb, Sc, Sr, Th, Ti, V, Y, Zn, and Zr.

Water Samples

• SR4: Savannah River Neutron Activation Analysis - Neutron Counting of waters for U.
• SR5: Savannah River Neutron Activation Analysis of waters for Al, Br, Cl, Dy, F, Mn, Na, and V. (Note: Mg may also be reported by this method.)

Discussion of the Reformatting Process for McAlester Quadrangle

Sediment Records
The McAlester quadrangle sediment data consist of records from the Oklahoma and Arkansas portions of the Arkansas, Louisiana, Mississippi, Missouri, Oklahoma, and Texas GJBX-104(82) Data Report combined with records from the ORGDP Ardmore, McAlester, Little Rock, and Helena Quadrangles GJBX-70(82) Data Report. When combining sample records, site descriptive information and coordinates were compared for all corresponding records. The following problems were found and addressed during the comparison and reformatting stages for the McAlester quadrangle sediment data:

1. The SRL and the ORGDP Laboratory each analyzed the same 89 stream-sediment samples from Arkansas. Because of overlapping data fields, it was necessary to create two data records for each sample to preserve all the data.
2. The original ORGDP files for the Ardmore, McAlester, Little Rock, and Helena quadrangles did not include all of the information about the character of the sample location. This missing information includes observations taken at each site on the stream width, depth, and flow, water color, surrounding vegetation, local relief, weather, and possible contaminants. In addition, the longitude coordinate reported in the ORGDP file only had 3 decimal places instead of the 4 decimal places found in the corresponding records from SRL State files. The missing site descriptive data and the complete longitude value were added to ORGDP records from the corresponding SRL State file records. Sources of data and any problems found are described in the REFORMAT comment field.
3. An unlikely sample collection date was found for one sample. This date was removed from the SAMPDAT field and the original SAMPDAT value with the most likely correct value was added as a comment to the REFORMAT field.
4. Gold concentrations from the GJBX-135(82) report were added to the appropriate sediment records. A value of -0.01 (<0.01 ppm Au) was added to all other sediment samples determined to have been analyzed by SRL neutron activation. This value was chosen because 0.01 is the lowest reported gold concentration in the entire report.

Water Records
The McAlester quadrangle water data consist of reformatted records from the Oklahoma and Arkansas portions of the Arkansas, Louisiana, Mississippi, Missouri, Oklahoma, and Texas GJBX-104(82) Data Report. The following problems were found and addressed during the comparison and reformatting stages for the McAlester quadrangle water data:

1. The original NURE format for surface-water files did not include much information about the character of the sample location. This missing information includes observations taken at each site on the stream width, depth, and flow, water color, surrounding vegetation, local relief, weather, and possible contaminants. This information is given in records for stream-sediment samples that were collected at the same locations. The available site descriptive information for stream-water sites were compared with the corresponding stream-sediment site records. The missing site descriptive data were then added to stream-water records from the corresponding stream-sediment sample records. Sources of data and any problems found are described in the REFORMAT comment field.
2. An analysis of latitude-longitude site coordinates identified several ground-water samples that were missing coordinates, did not plot within expected state, county, or map boundaries, or had differing coordinates in corresponding records. To correct or confirm sample coordinates, the original field collection maps for Sebastian County, Arkansas and Pushmataha County, Oklahoma were obtained and re-digitized. The newly re-digitized coordinates were added to the database and the coordinates from the original file(s) were recorded in the COORDPRB comment field. When the newly re-digitized coordinates were not significantly different, that confirmation of the site location was also noted in the COORDPRB comment 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 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).

McAlester Quadrangle Sediment Data - 930 records
McAlester Quadrangle Water Data - 1,082 records

Notes for Data Users

In the eastern United States, SRL collected samples primarily by county. Often, not all counties within a quadrangle were completely sampled. The laboratory and analytical methods used also may vary by county such that adjacent counties often have very different analytical coverages. Samples were collected from all of the Oklahoma and Arkansas counties within the McAlester quadrangle. The sampled Arkansas counties include Howard, Polk, Scott, Sebastian, and Sevier. The sampled Oklahoma counties include Atoka, Bryan, Choctaw, Latimer, Le Flore, McCurtain, Pittsburg, and Pushmataha.

Fifty-seven sediment samples within the McAlester quadrangle were not analyzed by any of the various laboratories. The following table summarizes the locations of those unanalyzed samples.

Other NURE Geochemical Data for the McAlester Quadrangle

Ouachita Mountains Orientation Studies
A hydrogeochemical ground-water orientation study was conducted in the area of the Ouachita Mountains, Arkansas in order to evaluate the usefulness of ground water as a sampling medium for uranium exploration in similar areas (GJBX-208(82)). A total of 93 springs and 9 wells were sampled in Clark, Garland, Hot Springs, Howard, Montgomery, Pike, Polk, and Sevier Counties of Arkansas within the El Dorado, Little Rock, and McAlester 1:250,000-scale quadrangles. Manganese, barite, celestite, cinnabar, stibnite, and sulfides of copper, lead, and zinc are present in the study area. Analyses and measurements were included in the text for the following: pH, conductivity, alkalinity, nitrate, ammonia, sulfates, phosphates, uranium, and 9 additional elements. Results of this study show that the minerals significantly affect the chemistry of the ground water. Data tables of analyses were included only in the text.

Within the Ouachita Mountains or Arkansas ground-water samples were collected periodically to establish whether or not ground-water chemistry is effected by seasonal changes (GJBX-199(82)). Samples from 13 ground-water sites (10 springs and 3 wells) were collected nine times during a 16-month period. "Daily" sampling of 6 sites was carried out over an 11-day period, with rain during this period. And finally, 1 site was sampled hourly over a 7-hour period. These samples were analyzed for pH, conductivity, temperature, total alkalinity, nitrate, ammonia, sulfate, phosphate, chloride, U, plus 21 other elements. The results of this study show that even though the dry season is during the late summer, and the wet season is during the late spring and late fall, there was no significant change in the ground water chemistry with season. Likewise, there was no significant change due to rain storm events ("daily" sampling) or hourly sampling. Samples were collected in Clark, Garland, Montgomery, Polk, and Pike Counties of Arkansas within the Little Rock and McAlester 1:250,000-scale quadrangles. Data tables of analyses were included in the text.

McAlester Quadrangle NURE Bibliography

• Fay, W.M., and Cook, J.R., 1982, Gold analyses by neutron activation from SRL NURE samples: E.I. du Pont de Nemours & Co., Savannah River Laboratory, Aiken, S.C., SRL Internal Doc. DPST-81-141-38, U.S. Department of Energy, Grand Junction, Colo., GJBX-135(82), 45 p.
• Fay, W.M., Sargent, K.A., and Cook, J.R., 1982, Data report: Arkansas, Louisiana, Mississippi, Missouri, Oklahoma, and Texas: E.I. du Pont de Nemours & Co., Savannah River Laboratory, Aiken, S.C., SRL Internal Doc. DPST-81-146-24, U.S. Department of Energy, Grand Junction, Colo., GJBX-104(82), 37 p.
• Steele, K.F., 1982, Orientation study, Ouachita Mountain area, Arkansas: E.I. du Pont de Nemours & Co., Savannah River Laboratory, Aiken, S.C., SRL Internal Doc. DPST-81-141-26, U.S. Department of Energy, Grand Junction, Colo., GJBX-208(82), 38 p.
• Steele, K.F., Fay, W.M., and Cavendor, P.N., 1982, Seasonal effect on ground water chemistry of the Ouachita Mountains: E.I. du Pont de Nemours & Co., Savannah River Laboratory, Aiken, S.C., SRL Internal Doc. DPST-81-141-27, U.S. Department of Energy, Grand Junction, Colo., GJBX-199(82), 63 p.
• Uranium Resource Evaluation Project, 1982, Hydrogeochemical and stream sediment reconnaissance basic data for Ardmore, McAlester, Little Rock, and Helena quadrangles, Oklahoma; Arkansas; Mississippi: Union Carbide Corporation, Nuclear Division, Oak Ridge Gaseous Diffusion Plant, Oak Ridge, Tenn., K/UR-425, U.S. Department of Energy, Grand Junction, Colo., GJBX-70(82), 61 p.
• Uranium Resource Evaluation Project, 1982, Supplement to hydrogeochemical and stream sediment reconnaissance basic data reports K/UR-405 and K/UR-408 through K/UR-443 [GJBX-52(82) through GJBX-88(82)]: Union Carbide Corporation, Nuclear Division, Oak Ridge Gaseous Diffusion Plant, Oak Ridge, Tenn., K/UR-412, U.S. Department of Energy, Grand Junction, Colo., GJBX-51(82), 25 p.

Links Within Open-File Report 97-492

Back to Arkansas NURE data
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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 1.20: August 07, 2000
Version 1.30: September 11, 2001
Version 1.41: February 23, 2006

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