Helicopter-borne magnetic, electro-magnetic and radiometric geophysical survey in Meråker, Trøndelag County

As an addition to NGU’s general geophysical mapping in Trøndelag, NGU conducted a high-resolution airborne geophysical survey in Meråker area in Trøndelag County on request of Norra Metals. This report describes and documents the acquisition, processing and visualization of the acquired datasets and presents them in maps. The geophysical surveys consist of 1054 line-km data, covering an area of 219 km2 flown on July 21st, 2021.
The NGU modified Geotech Ltd. Hummingbird frequency domain electromagnetic system supplemented by an optically pumped Cesium magnetometer and the Radiation Solutions 1024 channels RSX-5 spectrometer mounted on a AS350-B3 helicopter was used for data acquisition.