Data

Ar/Ar data are for 1 sample that constrains the cooling age of biotite. The geochronology provides time constraints for the age of gold mineralization in the Tuvatu Gold Mine in Fiji. Samples were provided by Thomas Monecke (Colorado School of Mines). Samples were analyzed in January 2024.

Experiments were conducted in the U.S. Geological Survey (USGS) Aqueous Trace Element Analysis Laboratory (ATEAL) in Denver, CO to support development and validation of a method for preparing biological materials for silicon analysis by solution phase inductively coupled plasma mass spectrometry (ICP-MS). The objective was to stabilize volatile silicon species resulting from a digestion...

The U.S. Geological Survey (USGS) collects magnetic susceptibility measurements on in-situ and laboratory rock samples to help identify the sources of anomalies in aeromagnetic surveys in Alaska. Magnetic susceptibility is a measure of how much a material will become magnetized in an applied magnetic field and is the ratio of magnetization, M (magnetic moment per unit volume), to the...

This U.S. Geological Survey (USGS) data release contains data from stream water and groundwater samples collected in July through October 2024 at the Perigo Mine site in Gilpin County, northern Colorado. Data were collected as part of a study aimed at characterizing the local groundwater flow system in the hillslope hosting the mine’s draining crosscut tunnel, and identifying sources of...

This data release provides digital flight line data for a high-resolution airborne magnetic and radiometric survey over the Laramie Mountains region of Wyoming. The airborne survey was funded by the Earth Mapping Resources Initiative (Earth MRI). The survey was designed by the USGS in collaboration with the Wyoming State Geological Survey and contracted by the USGS. The survey was...

Airborne electromagnetic (AEM) and magnetic survey data were collected during November 4–20, 2024 over a distance of 3,251 line kilometers in the western Mojave Desert, California. These data were collected in support of the U.S. Geological Survey (USGS) Earth Mapping Resources Initiative (Earth MRI), which aims to improve knowledge of the geologic framework of the United States through...

This data release contains digital radiometric flight line data for a high-resolution airborne magnetic and radiometric survey over an area of northwest Arkansas (version 2.0, May 2026). Data and documentation for the original version, including associated airborne magnetic data, can be found at https://doi.org/10.5066/P91O2Y8W. The airborne geophysical survey was jointly funded by the...

This data release provides digital flight line data for a high-resolution airborne magnetic and radiometric survey over the Elk Creek region of Nebraska and Kansas. The airborne survey was funded by the Earth Mapping Resources Initiative (Earth MRI). The survey was designed by the USGS in collaboration with the Nebraska Conservation and Survey Division and the Kansas Geological Survey...

This data release provides digital flight-line and gridded data for a high-resolution airborne magnetic and radiometric survey over the northeastern portion of the Colorado Mineral Belt, northern Colorado. The Colorado Mineral Belt is a broad, northeast-southwest trending alignment of historic mining districts that have produced multiple types of commodities, including critical minerals...

Radiometric data were collected at the Grand Junction Regional Airport radiometric calibration facility in March 2023 and August 2024. The facility consists of five ~9 by ~12 m (30 x 40 feet) concrete pads, each 18 in thick. Each pad provides sources of radioelements that are spatially homogeneous (see Ward, 1978). Three pads are dedicated K, Th, and U pads, each of which contains high...

This U.S. Geological Survey (USGS) data release contains analytical data from a suite of mineral samples collected from the Mount Weld carbonatite complex, western Australia. This complex hosts the largest producing rare earth element (REE) mine outside of China. The REEs are mined from the weathered material, a laterite, derived from an underlying carbonatite. Samples were collected...

This dataset consists of eight sandstone samples and four ash samples collected from the Bidahochi basin that were analyzed for U-Pb zircon ages. The dataset accompanies the publication "Late Miocene Colorado River arrival in Bidahochi basin permits spillover origin of Grand Canyon". Samples were collected from the field by Ryan Crow (USGS) and John Douglass (Paradise Valley Community...