Shaded relief Aeromagnetic colour map of Norway and the Norwegian- Greenland and Barents seas: Data compilation and examples of interpretation
The report is a summary of a poster that was presented at the 20. IUGG (Inter national Union of Geodesy and Geophysics) meeting in Vienna, August 1991. The Geological Survey of Norway (NGU) has covered the whole of Norway and its continental shelves with aeromagnetic surveys between 1965 and 1975. These data were complemented recently by significant acquisitions of new data from the northern Barents Sea. The combined NGU data sets have been merged with offshore magnetic observations assembled in the past two years by the Geologi- cal Survey of Canada (GSC). The bulk of these data sets were collected and provided to the GSC by the US Naval Research Laboratory and the US Naval Oceanographic Office. They are complemented by public domain data distributed by the USNational Geophysical Data Center on behalf of a variety of organizations. Displayed in preliminary shaded relief colour map of the magnetic anomaly east of 0o longitude, the combined NGU and GSC compilations illustrate effectively the major tectonic framework of the region. For example The continent-ocean boundary is precisely delineated along the Spitsbergen Feacture Zone. Major basement faults, structural highs and sedimentary basins are interpreted from the data. In the northern Barents Sea, the continuity of concealed orogenic elements (Caledonian) can be appraised.