WHAT DO GEOPHYSICAL INVESTIGATIONS OF THE BEAR LODGE, WYOMING, RARE EARTH ELEMENT DEPOSIT REVEAL?
The U.S. Geological Survey has been analyzing and interpreting geophysical datasets over rare earth element deposits in order to characterize the geologic setting and associated mineralization. Exploratory airborne and ground geophysical surveys have been performed over Bear Lodge prospect, including gravity, induced-potential, controlled-source audio-magnetotellurics, and high-resolution aeromagnetic and radiometric surveys. The airborne datasets especially reveal previously unmapped dikes and numerous pipe-like bodies on the flanks of the dome. Results of this research are presented here as thematic maps and model visualizations.