Austin Exploration has acquired gravity coverage in the Northern Columbia River Plateau area of Washington.

This coverage is part of a nonexclusive magnetotelluric/gravity package offered by Advanced Energy Technology Inc. and Austin Exploration. The gravity data are now available separately.

The data grid has an approximate 3x3 mile loop covering 9,000 square miles.

All field operations were supervised by a Potential Field Geophysicist to provide quality control of the data acquisition.

The position accuracy is less than 50 feet horizontal and one foot vertical.

The gravity values have an accuracy of less than 0.05 milligals.

The region is covered with basalt that makes seismic exploration difficult. The basalt is higher density than the underlying sediments and makes gravity information effective in defining areas of thin basalt and thick sedimentary section.

Basement structure contrasts in density with the overlying sediments and causes gravity anomalies. Magnetotelluric data responds to the above conditions and has also been used successfully in the Columbia River Plateau.

 

Specifications:

The plat (above) shows the outline of the survey area.

There are 20,266 gravity stations.