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By Shane Lasley
Metal Tech News 

Rare Earth MRI discovery in Maine

USGS geophysical survey identifies critical minerals target Metal Tech News - November 14, 2022

 

Last updated 12/6/2022 at 2:27pm

Red oval showing the radiometric anomaly at Pennington Mountain in Maine.

U.S. Geological Survey

A closeup of the geophysical anomaly that led to the rare earths-niobium-zirconium discovery at Pennington Mountain. Click on image for a view of the entire 2021 Earth MRI radiometric survey carried out by USGS in northern Maine.

A recent rare earth elements discovery in the far northern reaches of Maine demonstrates the value of the U.S. Geological Survey's Earth Mapping Resources Initiative, or Earth MRI, an aptly named project under which the USGS is partnering with state geologists to scan America's geology and critical mineral resource potential.

Much like the Earth MRI name implies, the Maine project began with ai...



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