Walsh County gabbro

Region Central, North Central
Mineral systems
Deposit types
Other minerals

Information leading to the delineation of this focus area

Basis for focus area Aeromagnetic and gravity anomalies, combined with limited borehole data, indicate a significant gabbro intrusion concealed under Paleozoic cover.
Identified resources Unknown.
Production Unknown.
Status Possible past exploration.
Estimated resources Unknown.
Geologic maps Sims and others (1991), scale 1:1,000,000.
Geophysical data Most of the area has Rank 1 aeromagnetic coverage (Brown and Drenth, 2022), otherwise Rank 5. Ground gravity coverage is poor.
Favorable rocks and structures Gabbro intrusion.
Deposits None.
Evidence from mineral occurrences No data (concealed).
Geochemical evidence No data.
Geophysical evidence Aeromagnetic and ground gravity anomalies.
Evidence from other sources Limited borehole information.
Cover thickness and description 100-1000 m Paleozoic and glacial cover.
Authors Benjamin J. Drenth.
New data needs Complete Rank 1 aeromagnetic coverage, ground gravity coverage, basement mapping.
Geologic mapping and modeling needs Improved basement map.
Geophysical survey and modeling needs complete Rank 1 aeromagnetic coverage, ground gravity coverage.
Digital elevation data needs Lidar adequate, but not needed (concealed).