Media Alert: Low-level flights to image geology over eastern Maine

The flights are part of the U.S. Geological Survey's Earth Mapping Resources Initiative, a national effort to collect modern high-resolution geophysical data for the nation and modernize understanding of the nation's geology. Earth MRI partners with the Maine Geological Survey and other state geological surveys, as well as industry and universities.

"Partnership with state surveys helps accomplish national goals like mapping the critical minerals the U.S. needs. Researchers at the Maine Geological Survey are helping with the work of the nation -- and adding to state knowledge crucial to water resources, hazards and the resource economy," said Jamey Jones, science coordinator for the U.S. Geological Survey's Earth Mapping Resources Initiative.

"This modern high-resolution geophysical survey will cross five different geologic terranes and their boundaries, giving us valuable information on Maine's geologic history and a road map for moving forward with detailed mapping of the Downeast region. I expect to be amazed by what it reveals," said Amber Whittaker, Senior Geologist with the Maine Geological Survey.

Geophysical surveys like this one image physical properties of the rocks, including composition and structure. Those findings in turn help geologists focus future mapping projects on the ground. Potential mineral commodities in the region include antimony, cobalt, copper, gallium, germanium, manganese, zinc, nickel, platinum group elements, tin, and tungsten, all of which are on the List of Critical Minerals maintained by the USGS as essential for the U.S. economy and national security. One industrial use of cobalt is for manufacturing lithium-ion batteries used in computers, power tools and vehicles. There is also additional potential for iron and gold in the survey area.

The USGS has contracted with Dewberry and Sander Geophysics Ltd to collect the airborne data. At least one Cessna 208 Grand Caravan fixed-wing aircraft will be equipped with an elongated "stinger" that houses sensors collecting data and extends behind the main cabin. These scientific instruments are completely passive with no emissions that pose a risk to humans, animals, or plant life. No photography or video data will be collected. The aircraft will be flown by experienced pilots who are specially trained and approved for low-level flying. These pilots work with the FAA to ensure flights are safe and in accordance with U.S. law. The surveys will be conducted during daylight hours only.

The flights will initially be based out of Presque Isle Northern Maine Airport (KPQI). The flights could shift with little warning to other parts of the survey area as necessitated by adverse flying conditions.

Earth MRI includes airborne geophysical surveys like this one, geochemical reconnaissance surveys, topographic mapping using LiDAR technology, hyperspectral surveys, and geologic mapping projects.

Map showing the location of the survey over portions of Maine. The survey area is outlined in blue. Counties in Maine covered by the survey area include Aroostook, Hancock, Penobscot, Piscataquis and Washington County.