Helicopter measurements over the Gjølanger area
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- Rapporter 
A helicopterborne geophysical survey was undertaken by the Geological Survey of Norway (NGU) over the Gjølangen area in Sogn og Fjordane county. The primary geophysical target was rutile bearing eclogite bodies, and to investigate if helicopterborne geophysical surveying is suitable for prospecting of this type. The survey consisted nominally of 1065 line kilometres with a line spacing of 100 metres. The instrument package included magnetometer, VLF-EM and gammaray spectrometer.This report describes equipment used for data acquisition. It also presents the processing sequence, and the results as colour maps in reduced scale. Maps in scale 1:20000 may be ordered from NGU.