CHAMPAIGN, Ill., 5/15/25: The U.S. Geological Survey, in collaboration with the Illinois State Geological Survey, is conducting an airborne geophysical survey over portions of southern Illinois to better understand the region’s geology and its potential for critical minerals.
This effort is part of a broader initiative to strengthen domestic supply chains for essential minerals crucial to national security, advanced manufacturing, and energy innovation while laying the foundation for new economic opportunities and job growth in the region, according to ISGS geologist Jared Freiburg.
Low-flying airplanes equipped with geophysical instruments will fly over parts of Williamson, Saline, Gallatin, Johnson, Pope, and Hardin counties, which are thought to be mineral-rich. Viewers can watch the planes flying at 400 feet above the surface and following southwest-to-northeast lines spaced about 1,000 feet apart. The ground clearance will increase to 1,000 feet in populated areas.
The survey will collect high-resolution data on rock formations, mineral deposits, and subsurface structures. These data will enhance geological mapping efforts, aid in mineral resource assessments, and provide valuable insights for industries seeking to develop domestic sources of critical minerals.
“Illinois has a rich geologic history with known mineral resources, including fluorspar and rare earth elements, among other critical minerals,” Freiburg said. “This survey is a critical step in understanding our state's potential to contribute to the nation’s critical minerals supply chain, reducing reliance on foreign sources and fostering economic growth and job creation in Illinois. Establishing a strong critical minerals industry here can revitalize communities and create high-paying, skilled jobs in mining, processing, and manufacturing.”
The flights, which are projected to occur the week of May 18th, comply with all Federal Aviation Administration regulations. The data collected will be made publicly available to benefit researchers, policymakers, and industry stakeholders working to secure America’s mineral future.
For more information about this survey and other critical minerals research in Illinois, visit the Illinois State Geological Survey website.
The Prairie Research Institute at the University of Illinois Urbana-Champaign provides scientific expertise and transformative research to the people of Illinois and beyond. PRI is home to the five state scientific surveys: the Illinois Natural History Survey, Illinois State Archaeological Survey, Illinois State Geological Survey, Illinois State Water Survey, and Illinois Sustainable Technology Center.
MEDIA CONTACT
Jared Freiburg | freiburg@illinois.edu | 217-244-2495
Director of the Critical Minerals Research and Development Center
Illinois State Geological Survey
271 Natural Resources Building, M/C 650
615 E. Peabody Dr.
Champaign, IL 61820