Airborne magnetic data are provided here as part of the data release "Airborne magnetic and radiometric survey, western Arkansas, 2022." This website includes the processed aeromagnetic data provided in an ASCII .csv file and geoTIFF images showing the total magnetic intensity and derivative products, including the first and second vertical derivatives, residual magnetics, and reduced-to-pole magnetics.

Airborne magnetic data are provided here as part of the data release "Airborne magnetic and radiometric survey, central Arkansas and southern Missouri, 2023." This website includes the processed aeromagnetic data provided in an ASCII (.csv) file and GeoTIFF images showing the total magnetic intensity and derivative products, including the first and second vertical derivatives, residual magnetics, and reduced-to-pole magnetics. Note that the standard magnetic pole-reduction filter used to create the reduced-to-pole magnetic GeoTIFF may not properly account for remanant magnetization of strongly magnetized rocks associated with intrusive complexes such as those near Magnet Cove, Little Rock, and Rison, AR.

Airborne magnetic data are provided here as part of the data release "Airborne magnetic and radiometric survey, central Arkansas and southern Missouri, 2023." This website includes the processed aeromagnetic data provided in an ASCII (.csv) file and GeoTIFF images showing the total magnetic intensity and derivative products, including the first and second vertical derivatives, residual magnetics, and reduced-to-pole magnetics. Note that the standard magnetic pole-reduction filter used to create the reduced-to-pole magnetic GeoTIFF may not properly account for remanant magnetization of strongly magnetized rocks associated with intrusive complexes such as those near Magnet Cove, Little Rock, and Rison, AR.

Airborne radiometric data are provided here as part of the data release "Airborne magnetic and radiometric survey, western Arkansas, 2022." This website includes the processed radiometric data, with and without spectra, provided in ASCII .csv files and geoTIFF images showing the total count (K, U, Th), percent potassium (%K), equivalent uranium (eU), and equivalent thorium (eTh).

Airborne radiometric data are provided here as part of the data release "Airborne magnetic and radiometric survey, western Arkansas, 2022." This website includes the processed radiometric data, with and without spectra, provided in ASCII .csv files and geoTIFF images showing the total count (K, U, Th), percent potassium (%K), equivalent uranium (eU), and equivalent thorium (eTh).

This publication provides digital flight line data for a high-resolution magnetic and radiometric survey over part of western Arkansas. The airborne geophysical survey was jointly funded by the USGS National Cooperative Geologic Mapping Program and the Earth Mapping Resource Initiative. The survey covers a rectangular area 91.55 by 92.15 kilometers (km) over the transition between the Ouachita Mountains and Ozark Plateau physiographic provinces and includes 31,006 line-km of magnetic and radiometric data. Data were collected from a fixed-wing aircraft flown at a median terrain clearance of 170 meters (m) above topography along north-south flight lines spaced at 300-m intervals. Tie lines were flown in an east-west direction every 3,000 m. Data were collected by EON Geosciences Inc. under contract with the USGS using a fixed-wing aircraft with a magnetometer mounted in the tail stinger and a fully calibrated gamma-ray spectrometer. The survey operated out of the Branson, Missouri airport from April of 2022 to May of 2022. Files that are available in this publication include flight line data for the magnetic survey, flight line data for the radiometric survey and a report describing the survey parameters, field operations, quality control and data reduction procedures. A zip file is provided that contains the contractor's deliverable products that includes Geosoft databases and grids for this magnetic and radiometric survey and the report describing the survey and data reduction. These products can be accessed using the free software Geosoft Viewer or the commercial Oasis Montaj software.

This publication provides digital flight line data for a high-resolution magnetic and radiometric survey over part of western Arkansas. The airborne geophysical survey was jointly funded by the USGS National Cooperative Geologic Mapping Program and the Earth Mapping Resource Initiative. The survey covers a rectangular area 91.55 by 92.15 kilometers (km) over the transition between the Ouachita Mountains and Ozark Plateau physiographic provinces and includes 31,006 line-km of magnetic and radiometric data. Data were collected from a fixed-wing aircraft flown at a median terrain clearance of 170 meters (m) above topography along north-south flight lines spaced at 300-m intervals. Tie lines were flown in an east-west direction every 3,000 m. Data were collected by EON Geosciences Inc. under contract with the USGS using a fixed-wing aircraft with a magnetometer mounted in the tail stinger and a fully calibrated gamma-ray spectrometer. The survey operated out of the Branson, Missouri airport from April of 2022 to May of 2022. Files that are available in this publication include flight line data for the magnetic survey, flight line data for the radiometric survey and a report describing the survey parameters, field operations, quality control and data reduction procedures. A zip file is provided that contains the contractor's deliverable products that includes Geosoft databases and grids for this magnetic and radiometric survey and the report describing the survey and data reduction. These products can be accessed using the free software Geosoft Viewer or the commercial Oasis Montaj software.

Airborne radiometric data are provided here as part of the data release "Airborne magnetic and radiometric survey, western Arkansas, 2023." This website includes the processed radiometric data, with and without spectra, provided in ASCII (.csv) and NetCDF (.nc) files and GeoTIFF images showing the total count (K, U, Th), percent potassium (%K), equivalent uranium (eU), and equivalent thorium (eTh). Also included is a shapefile showing areas where radiometric data should be considered unreliable due to increased flight altitude.

Airborne radiometric data are provided here as part of the data release "Airborne magnetic and radiometric survey, western Arkansas, 2023." This website includes the processed radiometric data, with and without spectra, provided in ASCII (.csv) and NetCDF (.nc) files and GeoTIFF images showing the total count (K, U, Th), percent potassium (%K), equivalent uranium (eU), and equivalent thorium (eTh). Also included is a shapefile showing areas where radiometric data should be considered unreliable due to increased flight altitude.

This publication provides digital flight line data for a high-resolution magnetic and radiometric survey over part of central Arkansas and southern Missouri. The airborne geophysical survey was funded by the Earth Mapping Resources Initiative and was designed to meet the complimentary needs related to geologic mapping and mineral resource research. The survey covers an irregularly shaped area of approximately 75,070 square kilometers (km^2) from southern Missouri, across part of the Arkoma basin and Ouachita Mountains into central Arkansas and includes 282,029 line-km of magnetic and radiometric data. Data were collected from fixed-wing aircraft flown at a median terrain clearance of 115 meters (m) above topography along north-south flight lines spaced at 300-m intervals. Tie lines were flown in an east-west direction every 3,000 m. Data were collected by EON Geosciences Inc. under contract with the USGS using five fixed-wing aircraft with a magnetometer mounted in the tail stinger and a fully calibrated gamma-ray spectrometer. The survey operated out of the Branson Airport in Missouri, the West Memphis Municipal Airport in Tennessee, and the North Little Rock Municipal and Texarkana Regional Airports in Arkansas from November of 2022 to May of 2023. Files that are available in this publication include flight line data for the magnetic survey, flight line data for the radiometric survey and a report describing the survey parameters, field operations, quality control and data reduction procedures. A zip file is provided that contains the contractor's deliverable products that includes Geosoft databases and grids for this magnetic and radiometric survey and the report describing the survey and data reduction. These products can be accessed using the free software Geosoft Viewer or the commercial Oasis montaj software.