The application of computer-assisted photogrammetric methods in the structural analysis of part of the North Greenland Fold Belt

The development of computer support in photogrammetric measurements has facilitated quick calculations of structural geological elements such as strike and dip, fold axes and axial planes. Computer-assisted photogrammetric methods have been applied in a structural analysis of 3000 km² in central Peary Land, North Greenland. Detailed studies have been carried out in an area covered by a single stereo model representing part of the southernmost margin of the North Greenland Fold Belt. On the basis of the aerial photos, a map with both lithological boundaries and structural measurements may be drawn. In little known areas with complex structural relationships field work is necessary to control the interpretation. In the present study refolded thrust fault structures were investigated. Preparatory photogrammetric studies allow the limited time available for field work to be effectively utilised, and accurate geological maps to be produced relatively quickly.