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Friday, July 4, 2025

https://youtu.be/BZ_yFu8bDNw

The United States Geological Survey (USGS), in partnership with state geological surveys, has initiated an ambitious project that uses low-level aircraft to map the subsurface geology of Michigan's Upper Peninsula and northern Wisconsin. This effort, part of the USGS's Earth Mapping Resources Initiative (Earth MRI), seeks to modernize geological data to identify and secure critical mineral resources vital to the U.S. economy and national security. The region is geologically significant due to its location within the Penokean Orogen and the Mid-Continent Rift System, both known for hosting critical mineral deposits such as copper, nickel, cobalt, and rare earth elements. These minerals are essential for industries like renewable energy, electronics, and defense. The methodology involves fixed-wing aircraft flying at approximately 300 feet (100 m) above the ground in a systematic grid pattern. These aircraft are equipped with advanced geophysical instruments that measure the electrical resistivity of the subsurface using airborne electromagnetic (AEM) techniques. This allows for the construction of high-resolution three-dimensional (3D) representations of the subsurface, mapping geological structures and mineral deposits down to depths of approximately 1,500 feet (500 m). The resulting data is of immense scientific and practical value, enhancing the understanding of the region's geological evolution, supporting mineral exploration, environmental management, water resource studies, and surficial mapping. Furthermore, this information will assist policymakers in making informed decisions regarding resource extraction and public health protection. P. Geo. Ricardo A Valls, M. Sc. and Geo Gadfly Valls Geoconsultant ORCID ID- https://orcid.org/0000-0002-5421-0914 Scopus Author ID: 7003369619/35335510700 ResearcherID: S-6604-2018 If you like this content, please "buy me a coffee" https://www.buymeacoffee.com/goldendroplets

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