Images

This map shows the airborne geophysical survey area and planned flight paths across the Illinois River Basin in Illinois and northwest Indiana. Surveys will not occur directly above populated areas. Planned flight lines and survey progress can be found online. 

(USGS map) 

Geologic map overlaid on topography for the Mountain Pass region in California.

The anomaly at Pennington Mountain is visible in the geophysical data collected in aerial surveys conducted in 2021.

A fine-grained volcanic rock (trachyte) that hosts rare earth elements, niobium, and zirconium, all which are considered critical mineral resources. This rock was found on Pennington Mountain in Maine. Image courtesy of Chunzeng Wang, University of Maine-Presque Isle.

A Piper Navajo fixed-wing aircraft with rear facing stinger magnetometer. Credit: New-Sense Geophysics Limited 

USGS NIC UASRC Saucer Shark equipment marker showing the Saucer flying over trees, with a ‘I WANT TO BELIEVE’ phrase below it. ​

An AS350 helicopter with forward facing stinger magnetometer. Credit: New-Sense Geophysics Limited 

Airborne geophysical surveys make use of a boom with sensitive equipment installed on small aircraft.

A helicopter with a boom that contains sensitive equipment for conducting airborne geophysical surveys.

Survey area for low-flying helicopter soon to be visible in six Montana counties, including Helena, the Elkhorn Mountains, Bull Mountain and the Tobacco Root Mountains.

Helicopter conducting low-level flights. Image courtesy Sander Geophysics Ltd.

Geologists in the field at Pennington Mountain. The orange instrument is a portable gamma spectrometer. University of Maine-Presque Isle professor Chunzeng Wang (the lead author) is in front, Preston Bass is carrying the meter.

Open pit rare earth element mine at Mountain Pass, California. Stepped sides of the pit and access for mining vehicles are shown.

Open pit rare earth element mine at Mountain Pass, California. Stepped sides of the pit and access for mining vehicles are shown.

A low-flying helicopter towing a geophysical device collects scientific data on groundwater and geology. Information collected during these surveys can help with studying critical mineral resources, natural hazards and groundwater potential.

A helicopter rigged with an airborne geophysical survey collecting equipment. Information collected during these surveys can help with studying critical mineral resources, natural hazards and groundwater potential. A cow is here too.

Landsat 9 is the latest in a prestigious line of satellites that have been watching our planet for nearly 50 years. They have monitored changes on land and made that information freely available to users around the world.

Geologist, Sue Karl, at Graphite Creek Deposit on the Seward Peninsula, Alaska. She is making field observations and measurements about the flake graphite deposit and the surrounding host rocks. These observations were used in developing a model of flake graphite genesis. Graphite is a critical mineral which the US depends entirely on imports.

A geologist, George Case, stands in front of an adit, an entrance to an underground mine, in the Graphite Creek Deposit on the Seward Peninsula, Alaska.

View of the Kigluaik Mountains gneiss dome which is the location of the Graphite Creek Deposit. The rocks of the gneiss dome were metamorphosed to as high as granulite facies during the middle Cretaceous (ca. 100 – 90 Ma), forming flake graphite ore in the process.

Scenic view of the Seward Peninsula, Alaska. Photo taken from a ridge above Graphite Creek, looking northwest towards the Imruk Basin. This area of the Seward Peninsula holds the largest graphite deposit in the US known as the Graphite Creek Deposit.