Return to search results
💡 Advanced Search Tip
Search by organization or tag to find related datasets
Airborne magnetic and radiometric survey, southeastern Illinois, western Kentucky, and southern Indiana, 2019 (version 2.0, August 2025)
This data release contains digital radiometric flight line data for a high-resolution airborne magnetic and radiometric survey over southeastern Illinois, western Kentucky, and southern Indiana, 2019 (version 2.0, August 2025). Data and documentation for the original version, including associated airborne magnetic data, can be found at https://doi.org/10.5066/P9R05B0M. The airborne geophysical survey was funded by the Earth Mapping Resources Initiative and was designed to meet the complementary needs related to geologic mapping and mineral resource research. The survey covers a 91-kilometer x 128-kilometer area centered on the igneous complex around Hicks Dome in Hardin County, Illinois. Data were collected along east-west flight lines spaced 200 meters apart with north-south tie lines flown every 3,000 meters. A mean terrain clearance of 116 meters was maintained except where safety dictated a higher elevation. A total of 61,974-line kilometers of data were collected. Data for this survey were collected by EON Geosciences 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 Paducah, Kentucky airport from October of 2019 to December of 2019. This version (version 2.0, August 2025) of the radiometric data has been reprocessed from the original dataset by New Resolution Geophysics (NRG) in 2024 under contract by the USGS using noise-adjusted singular value decomposition (NASVD) spectral component analysis procedure for improving the signal-to-noise ratio of the radiometric data. This website includes the reprocessed radiometric data, with and without spectra, provided in ASCII (.csv) and NetCDF (.nc) files; GeoTIFF images showing the total count (K, U, Th), percent potassium (%K), equivalent uranium (eU), equivalent thorium (eTh), and ternary (%K, eU, eTh); 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 including Geosoft databases and grids for this radiometric dataset and the report describing the survey and data reduction. These files are provided as received from the contractor. The files in this package are readable using the free software Geosoft Viewer or the commercial Oasis Montaj software.
Complete Metadata
| @id | http://datainventory.doi.gov/id/dataset/74ed08e50f3c776bdd2e52ca1552463a |
|---|---|
| bureauCode |
[ "010:12" ] |
| identifier | USGS:63a0bf61d34e0de3a1f2780e |
| spatial | -88.8854,36.8533,-87.8388,38.018 |
| theme |
[ "geospatial" ] |
