Magnetic susceptibility and gamma ray spectrometry measurements in southwestern Montana, 2025
September 16, 2025
This dataset includes rock magnetic susceptibility and gamma ray spectrometry measurements from 204 outcrops in southwest Montana during 2025. The measurements were collected to understand the causative sources of airborne magnetic and radiometric survey anomalies in the Idaho-Montana porphyry belt. Sixteen magnetic susceptibility measurements were collected at each analyzed site using a ZH Instruments SM30 susceptibility meter. Gamma ray measurements were collected using a Radiation Solutions RS-230 BGO Super-SPEC Handheld Gamma-Ray Spectrometer. Geologic units were assigned from 1:100,000 scale digital geologic maps noted in the supplemental information section of the metadata file.
Citation Information
| Publication Year | 2025 |
|---|---|
| Title | Magnetic susceptibility and gamma ray spectrometry measurements in southwestern Montana, 2025 |
| DOI | 10.5066/P1YBQZFF |
| Authors | Benjamin P Magnin, Snir Attia, Eric D Anderson, Julia A. McIntosh, Celestine N Mercer, Sean P Gaynor, Karen Lund |
| Product Type | Data Release |
| Record Source | USGS Asset Identifier Service (AIS) |
| USGS Organization | Geology, Geophysics, and Geochemistry Science Center |
| Rights | This work is marked with CC0 1.0 Universal |
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