Project AEROMAG-92: a new high resolution aeromagnetic survey of the Lersletten area, central West Greenland (68°15 to 68°55'N, 50°25' to 53°35'W)

A new high resolution aeromagnetic survey has been flown over Lersletten, central West Greenland. The survey comprises 10 062 line kilometres covering approximately 8 425 km2. Line spacing is 1 km, with 5 km between tie-lines and the altitude fixed at approximately 500 metres. The data have been acquired, compiled and interpreted by Geoterrex Ltd, and in this report a qualitative discussion relates the data to the Nagssugtoqidian geology of the area. It is also demonstrated that later geological events can be seen in the data, e.g. possible deep-seated intrusions and reversely magnetised dykes and sills. Copies of the original maps of flight lines, total field anomalies, calculated vertical derivative anomalies and interpreted features, as well as the digital data are available from GGU.