Merging airborne, marine and ground-based magnetic anomaly maps with satellite derived lithospheric field models

Details Merging airborne, marine and ground-based magnetic anomaly maps with satellite derived lithospheric field models Merging airborne, marine and ground-based magnetic anomaly maps with satellite derived lithospheric field models

Dec 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005agufmgp23b..06h&link_type=abstract

American Geophysical Union, Fall Meeting 2005, abstract #GP23B-06

Mathematics

Logic

0910 Data Processing, 1517 Magnetic Anomalies: Modeling And Interpretation, 1541 Satellite Magnetics: Main Field, Crustal Field, External Field, 1545 Spatial Variations: All Harmonics And Anomalies, 1595 Planetary Magnetism: All Frequencies And Wavelengths

Scientific paper

Regional compilations of aeromagnetic, marine and ground magnetic datasets are increasingly used to stitch together magnetic anomaly maps on continental scale. Such maps have played a key role in unraveling the structure and dynamics of the Earth's lithosphere. However, studies have revealed that stitched magnetic anomaly maps are plagued with erroneous long wavelength information. In addition, rapidly changing main magnetic field from the Earth's core renders it difficult to define an accurate reference field and hence to combine datasets measured at different times, locations and altitudes. We propose a method to combine the short wavelength information from airborne, shipborne and ground magnetic surveys, with the long wavelength grid from satellite derived lithospheric field model. The merged map will allow for modeling and interpreting not only shallow geological features, but also large tectonic provinces dominant in continental scale magnetic anomaly maps.

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