Airborne magnetic and radiometric data acquired over parts of Hudspeth, Culberson, Jeff Davis, Presidio, and Brewster Counties, Texas

This data release provides digital flight line data for a high-resolution airborne magnetic and radiometric survey of the Texas Alkaline Igneous Belt in western Texas. The airborne survey was funded by the Earth Mapping Resources Initiative. NV5 Geospatial, in collaboration with EDCON-PRJ, Inc., acquired high-precision airborne magnetic and radiometric data from January 19, 2025 to September 25, 2025. Data were collected with a fixed wing aircraft along east-west flight lines spaced at 200 meters, and north-south tie lines spaced at 2000 meters, at a nominal terrain clearance of 120 meters above topography, except where rough terrain or populated areas required greater clearance. A total of 166,594 line-kilometers of magnetic and radiometric data was acquired along 1,306 primary survey lines and 141 tie lines. Files available in this data release include the magnetic data, the radiometric data, and a report describing the survey parameters, field operations, quality control, and data processing procedures. Data files are provided in non-proprietary formats: tables in CSV format and grids in GeoTIFF format, as exported by the commercial geophysical software Oasis montaj. In addition, ZIP files are provided that contain the data in proprietary-format files delivered by the contractor as Geosoft databases (*.gdb) and grids (*.grd).