This map is a compilation of aeromagnetic surveys over Yukon and eastern Alaska. Aeromagnetic surveys degree the total intensity of the earth's magnetic field. The field was measured by a magnetometer aboard an aircraft flown in parallel lines spaced at 200 m to 10000 m across the map area. The magnetic field reflects magnetic properties of bedrock and provides qualitative and quantitative information used in geological mapping. Understanding the geology will help geologists map the area,assist mineral/hydrocarbon exploration activities, and provide useful information essential for communities, and aboriginal associations,and government to make land expend decisions. This survey was flown to improve our knowledge of the area. It will support ongoing geological mapping and resource assessment.
Source: usgs.gov