Helicopter-borne magnetic, electromagnetic and radiometric geophysical syrvey of Stjernøy, Finnmark County

Abstract

NGU conducted an airborne geophysical survey at Stjernøy Finnmark in September 2013 and August 2014 as a part of the MINN project. This report describes and documents the acquisition, processing and visualization of recorded datasets. The geophysical survey results reported herein are 1347 line km, covering an area of 269 km2.The NGU modified Geotech Ltd. Hummingbird frequency domain system supplemented by optically pumped Cesium magnetometer and a 1024 channels RSX-5 spectrometer was used for data acquisition.The survey was flown with 200 m line spacing, line direction 150o (Northwest to Southeast), and average speed 55 km\/h. The average terrain clearance of the bird was 65 m.