Bethany L. Burton
Burke J. Minsley
Benjamin R. Bloss
James R. Rigby
Wade H. Kress
Bruce D. Smith
20190827
Airborne EM, magnetic, and radiometric survey data, Shellmound, Mississippi, March 2018
tabular digital data, raster digital data
Denver, CO
U.S. Geological Survey
Additional information about Originator: Burton, B.L., https://orcid.org/0000-0001-5011-7862; Minsley, B.J., https://orcid.org/0000-0003-1689-1306; Bloss, B.R., https://orcid.org/0000-0002-1678-8571; Rigby, J.R., https://orcid.org/0000-0002-5611-6307; Kress, W.H., https://orcid.org/0000-0002-6833-028X; Smith, B.D., https://orcid.org/0000-0002-1643-2997
https://doi.org/10.5066/P9D4EA9W
Airborne electromagnetic (AEM), magnetic, and radiometric data were acquired in late February to early March 2018 along 2,364 line-kilometers in the Shellmound, Mississippi study area. Data were acquired by CGG Canada Services, Ltd. with three different helicopter-borne sensors: the CGG Canada Services, Ltd. RESOLVE frequency-domain AEM instrument that is used to map subsurface geologic structure at depths up to 100 meters, depending on the subsurface resistivity; a Scintrex CS-3 cesium vapor magnetometer that detects changes in deep (hundreds of meters to kilometers) geologic structure based on variations in the magnetic properties of different formations; and a Radiation Solutions RS-500 spectrometer that detects the abundance of natural radioelements potassium, uranium, and thorium in the upper 20-30 cm that is used to determine differences in soil constituents. The survey was flown at a nominal sensor flight height of 30 m above terrain to form block-style coverage with 250 to 1,000-meter spaced east-west flight lines. This data release includes minimally processed (raw) AEM data, as well as unprocessed and processed (diurnally corrected and draped to terrain) magnetic data, and unprocessed and processed (following International Atomic Energy Agency Technical Report procedures) radiometric data, all as supplied by CGG Canada Services, Ltd. (https://www.sciencebase.gov/catalog/item/5ca6ce7ee4b0c3b0064c2ce5). Data acquisition and minimal processing was conducted by CGG Canada Services, Ltd. and described in detail in the contractor's report. Digital data from production flights are provided, and data fields are defined in the data dictionary.
An important driver for this survey is a managed aquifer recharge pilot project developed by the U.S. Department of Agriculture Agricultural Research Service investigating the use of bank filtration along the Tallahatchie River as a source for recharge in areas of significant groundwater decline by direct injection into the Mississippi River Valley Alluvial Aquifer (MRVA). Understanding the structure of the aquifer, including both shallow and deep confining units, is important for the success of this pilot engineering study and will be even more important for potential future large-scale engineering projects and groundwater model development efforts.
REFERENCES
International Atomic Energy Agency, 1991, Airborne Gamma Ray Spectrometer Surveying, Technical Reports Series No. 323, IAEA, Vienna.
U.S. Geological Survey, The National Map, 2017, 3DEP products and services: The National Map, 3D Elevation Program Web page, accessed October 2018 at https://nationalmap.gov/3DEP/3dep_prodserv.html.
These data were collected to contribute high-resolution information about subsurface geologic structure that will be used to inform hydrologic models, water resource infrastructure studies, and local decision making concerning the Mississippi River Valley Alluvial aquifer.
20180220
20180304
ground condition
None planned
-90.5525
-90.1681
33.7846
33.5060
ISO 19115 Topic Category
geoscientificInformation
environment
USGS Thesaurus
electromagnetic surveying
aeromagnetic surveying
aeroradiometric surveying
geophysics
hydrogeology
resistivity
magnetic field
magnetic anomaly maps
geospatial datasets
engineering sciences
water resources
groundwater
None
electromagnetics
radiometrics
magnetics
USGS Metadata Identifier
USGS:5ca6ce7ee4b0c3b0064c2ce5
Geographic Names Information System (GNIS)
Shellmound
Greenwood
Mississippi
Tallahatchie River
Leflore County
Sunflower County
None
Mississippi Alluvial Plain
Mississippi River Valley Alluvial aquifer
MRVA
Geology, Geophysics, and Geochemistry Science Center
GGGSC
None.
Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Although these data have been processed successfully on a computer system at the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data for other purposes, nor on all computer systems, nor shall the act of distribution constitute any such warranty. The USGS or the U.S. Government shall not be held liable for improper or incorrect use of the data described and/or contained herein.
Bethany L. Burton
U.S. Geological Survey, Rocky Mountain Region
Geophysicist
mailing address
Denver Federal Center, Bldg 20, Box 25046, MS964
Denver
CO
80225
United States
303-236-1327
blburton@usgs.gov
Daily quality control of raw electromagnetic, magnetic, and radiometric data was performed by the contractor. Further quality control measures occurred post flight by the contractor and USGS scientist-in-charge before approval and acceptance of the final data.
Data were loaded into the Aarhus Workbench software (Aarhus Geosoftware, Aarhus, Denmark) and visually inspected.
Data set is considered complete for the information presented, as described in the abstract. Users are advised to read the rest of the metadata record carefully for additional details.
Field quality control and assurance procedures were undertaken by CGG Canada Services, Ltd. and are described in the contractor's report included with this data release.
Field quality control and assurance procedures were undertaken by CGG Canada Services, Ltd. and are described in the contractor's report included with this data release.
Electromagnetic, magnetic, and radiometric data processing was undertaken by CGG Canada Services, Ltd. Survey collection and processing details are described in the contractor's report, Shellmound_CGGReport_R603756RWA.pdf, included with this data release.
201805
Final data and contractor's report were received by USGS from CGG Canada Services, Ltd.
20180523
Final data were exported to CSV format to meet open data requirements.
201903
Geosoft Oasis montaj (Geosoft Inc., Toronto, Canada) format grid (.grd) files provided by CGG Canada Services, Ltd. as part of the contractor's report were reprojected to the WGS84 cartesian coordinate system and exported as Grid Exchange Format (.gxf) grids to meet open data requirements.
201903
None
Point
Albers Conical Equal Area
29.5
45.5
-96.0
23.0
0.0
0.0
coordinate pair
0.6096
0.6096
meters
WGS_1984
WGS_84
6378137.0
298.257223563002
Final contractor data deliverable package from CGG Canada Services, Ltd. The contractor's report (Shellmound_CGGReport_23May2018_R603756RWA.pdf) is included and describes the survey parameters, field operations, quality control results, and data reduction procedures used to produce the electromagnetic, magnetic, and radiometric data as well as all files included in the package.
Shellmound_CGGContractorPackage_23May2018_R603756RWA.zip (https://www.sciencebase.gov/catalog/item/5ca6ce7ee4b0c3b0064c2ce5)
Final contractor's report from CGG Canada Services, Ltd. that describes the survey parameters, field operations, quality control results, and data reduction procedures used to produce the electromagnetic, magnetic, and radiometric data as well as all files included in the contractor data deliverable package.
Shellmound_CGGReport_23May2018_R603756RWA.pdf (https://www.sciencebase.gov/catalog/item/5ca6ce7ee4b0c3b0064c2ce5)
A data dictionary describing the entity and attributes for the airborne electromagnetic, magnetic, and radiometric data developed from the contractor's report for data acquired with the CGG Canada Services, Ltd. RESOLVE frequency-domain helicopter-borne system with a Scintrex CS-3 cesium vapor magnetometer and Radiation Solutions RS-500 spectrometer (Shellmound2018_EM_Mag_Rad_rawData.csv).
ShellmoundAEM2018_DataDictionay_rawData.csv (https://www.sciencebase.gov/catalog/item/5ca6ce7ee4b0c3b0064c2ce5)
The raw and minimally processed airborne electromagnetic, magnetic, and radiometric data provided with the contractor's report for data acquired with the CGG Canada Services, Ltd. RESOLVE frequency-domain helicopter-borne system with a Scintrex CS-3 cesium vapor magnetometer and Radiation Solutions RS-500 spectrometer.
Shellmound2018_EM_Mag_Rad_rawData.csv (https://www.sciencebase.gov/catalog/item/5ca6ce7ee4b0c3b0064c2ce5)
Grid of the calculated vertical magnetic gradient of the final residual magnetic intensity (RMI entity) with units of nanoTesla/meter (nT/m). This grid has been converted to grid exchange format (.gxf) from the contractor-provided Geosoft Oasis montaj grid (.grd) file format and reprojected to the WGS cartensian coordinate system to meet open data requirements. The contractor report describes the grid generation procedure.
Shellmound2018_ddWGS84_cvg.gxf (https://www.sciencebase.gov/catalog/item/5ca6ce7ee4b0c3b0064c2ce5)
Grid of the total air absorbed gamma dose rate (doserate entity) with units of nanoGray/hour (nGy/h). This grid has been converted to grid exchange format (.gxf) from the contractor-provided Geosoft Oasis montaj grid (.grd) file format and reprojected to the WGS84 cartesian coordinate system to meet open data requirements. The contractor report describes the grid generation procedure.
Shellmound2018_ddWGS84_doserate.gxf (https://www.sciencebase.gov/catalog/item/5ca6ce7ee4b0c3b0064c2ce5)
Grid of the digital terrain model (DTM entity) of ground surface elevation referenced to mean sea level (Earth Gravitational Model (EGM96)) with units of meter (m). This grid has been converted to grid exchange format (.gxf) from the contractor-provided Geosoft Oasis montaj grid (.grd) file format and reprojected to the WGS84 cartesian coordinate system to meet open data requirements. The contractor report describes the grid generation procedure.
Shellmound2018_ddWGS84_dtm.gxf (https://www.sciencebase.gov/catalog/item/5ca6ce7ee4b0c3b0064c2ce5)
Grid of the equivalent thorium concentration (eth entity) with units of parts per million (ppm). This grid has been converted to grid exchange format (.gxf) from the contractor-provided Geosoft Oasis montaj grid (.grd) file format and reprojected to the WGS84 cartesian coordinate system to meet open data requirements. The contractor report describes the grid generation procedure.
Shellmound2018_ddWGS84_eth.gxf (https://www.sciencebase.gov/catalog/item/5ca6ce7ee4b0c3b0064c2ce5)
Grid of the equivalent uranium concentration (eu entity) with units of parts per million (ppm). This grid has been converted to grid exchange format (.gxf) from the contractor-provided Geosoft Oasis montaj grid (.grd) file format and reprojected to the WGS84 cartesian coordinate system to meet open data requirements. The contractor report describes the grid generation procedure.
Shellmound2018_ddWGS84_eu.gxf (https://www.sciencebase.gov/catalog/item/5ca6ce7ee4b0c3b0064c2ce5)
Grid of the potassium concentration (kconc entity) with units of percentage (%). This grid has been converted to grid exchange format (.gxf) from the contractor-provided Geosoft Oasis montaj grid (.grd) file format and reprojected to the WGS84 cartesian coordinate system to meet open data requirements. The contractor report describes the grid generation procedure.
Shellmound2018_ddWGS84_k.gxf (https://www.sciencebase.gov/catalog/item/5ca6ce7ee4b0c3b0064c2ce5)
Grid of the final residual magnetic intensity (RMI entity) with units of nanoTesla (nT). This grid has been converted to grid exchange format (.gxf) from the contractor-provided Geosoft Oasis montaj grid (.grd) file format and reprojected to the WGS84 cartesian coordinate system to meet open data requirements. The contractor report describes the grid generation procedure.
Shellmound2018_ddWGS84_mag_rmi.gxf (https://www.sciencebase.gov/catalog/item/5ca6ce7ee4b0c3b0064c2ce5)
Grid of the total magnetic intensity (TMI entity) with units of nanoTesla (nT). This grid has been converted to grid exchange format (.gxf) from the contractor-provided Geosoft Oasis montaj grid (.grd) file format and reprojected to the WGS84 cartesian coordinate system to meet open data requirements. The contractor report describes the grid generation procedure.
Shellmound2018_ddWGS84_mag_tmi.gxf (https://www.sciencebase.gov/catalog/item/5ca6ce7ee4b0c3b0064c2ce5)
Grid of the 40,000 MHz apparent resistivity (res40k entity) with units of ohm-meters (ohm-m). This grid has been converted to grid exchange format (.gxf) from the contractor-provided Geosoft Oasis montaj grid (.grd) file format and reprojected to the WGS84 cartesian coordinate system to meet open data requirements. The contractor report describes the grid generation procedure.
Shellmound2018_ddWGS84_res40k.gxf (https://www.sciencebase.gov/catalog/item/5ca6ce7ee4b0c3b0064c2ce5)
Grid of the 140,000 MHz apparent resistivity (res140k entity) with units of ohm-meters (ohm-m). This grid has been converted to grid exchange format (.gxf) from the contractor-provided Geosoft Oasis montaj grid (.grd) file format and reprojected to the WGS84 cartesian coordinate system to meet open data requirements. The contractor report describes the grid generation procedure.
Shellmound2018_ddWGS84_res140k.gxf (https://www.sciencebase.gov/catalog/item/5ca6ce7ee4b0c3b0064c2ce5)
Grid of the 400 MHz apparent resistivity (res400 entity) with units of ohm-meters (ohm-m). This grid has been converted to grid exchange format (.gxf) from the contractor-provided Geosoft Oasis montaj grid (.grd) file format and reprojected to the WGS84 cartesian coordinate system to meet open data requirements. The contractor report describes the grid generation procedure.
Shellmound2018_ddWGS84_res400.gxf (https://www.sciencebase.gov/catalog/item/5ca6ce7ee4b0c3b0064c2ce5)
Grid of the 1,800 MHz apparent resistivity (res1800 entity) with units of ohm-meters (ohm-m). This grid has been converted to grid exchange format (.gxf) from the contractor-provided Geosoft Oasis montaj grid (.grd) file format and reprojected to the WGS84 cartesian coordinate system to meet open data requirements. The contractor report describes the grid generation procedure.
Shellmound2018_ddWGS84_res1800.gxf (https://www.sciencebase.gov/catalog/item/5ca6ce7ee4b0c3b0064c2ce5)
Grid of the 8,200 MHz apparent resistivity (res8200 entity) with units of ohm-meters (ohm-m). This grid has been converted to grid exchange format (.gxf) from the contractor-provided Geosoft Oasis montaj grid (.grd) file format and reprojected to the WGS84 cartesian coordinate system to meet open data requirements. The contractor report describes the grid generation procedure.
Shellmound2018_ddWGS84_res8200.gxf (https://www.sciencebase.gov/catalog/item/5ca6ce7ee4b0c3b0064c2ce5)
ScienceBase
U.S. Geological Survey
mailing and physical address
Denver Federal Center, Building 810, Mail Stop 302
Denver
CO
80225
United States
1-888-275-8747
sciencebase_datarelease@usgs.gov
Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data for other purposes, nor on all computer systems, nor shall the act of distribution constitute any such warranty.
Part or all of this report is presented in Portable Document Format (PDF); the latest version of Adobe Acrobat Reader or similar software is required to view it.
20240308
Bethany L. Burton
U.S. Geological Survey, Rocky Mountain Region
Geophysicist
mailing and physical address
Denver Federal Center, Bldg 20, Box 25046, MS964
Denver
CO
80225
United States
303-236-1327
blburton@usgs.gov
FGDC Content Standard for Digital Geospatial Metadata
FGDC-STD-001-1998