Merging aeromagnetic data collected at different levels: the GEOMAUD survey

• Published in: Annals of Geophysics
• Main Author: D. Damaske
• Format: Article in Journal/Newspaper
• Language: English
• Published: Istituto Nazionale di Geofisica e Vulcanologia (INGV) 1999
• Subjects: Queen Maud Land; Antartica; aeromagnetics; magnetic anomaly maps; Meteorology. Climatology; QC851-999; Geophysics. Cosmic physics; QC801-809; Polar Plateau; antartic*
• Online Access: https://doi.org/10.4401/ag-3710; https://doaj.org/article/42628b48f4ae4d2989550eea5393234a

As part of the German GEOMAUD-expedition an aeromagnetic survey was carried out in Central Queen Maud Land. The helicopter-borne survey was designed in a conventional form of a regional survey with a spacing of profile-lines of 4.4 km. Due to terrain considerations - surveying from the coast across the mountain ranges to the high altitudes of the polar plateau - the survey was split into two sections flown at different constant levels. Over the coastal part survey elevation was 570 m (above sea level) while for the mountain section 2845 m was chosen. Both survey parts were processed separately. The low level section was upward continued before merging with the high level section. Though this leads to a homogeneous magnetic anomaly map, in some applications it may be more advantageous to present the anomalies of the magnetic field in original survey levels as a simple combined map because small scale features are preserved and can be used in recognizing magnetic units and patterns for geological/geophysical interpretation.