HR: 16:45h
AN: GP24A-05    [Abstracts]
TI: Signature and Thickness of Magnetic Crust Determined From Satellite Data
AU: * Whaler, K A
EM: kathy.whaler@ed.ac.uk
AF: Institute of Earth Science University of Edinburgh Grant Institute, West Mains Road, Edinburgh, EH9 3JW United Kingdom
AU: Purucker, M E
EM: purucker@geomag.gsfc.nasa.gov
AF: Ratheon ITSS at Planetary Geodynamics Branch, Code 698 Goddard Space Flight Center, Greenbelt, MD 20771 United States
AB: Intermediate wavelength magnetic anomalies determined from satellite data exhibit patterns interpretable in terms of crustal thickness. Previous work has demonstrated that seismic, compositional and thermal models of crustal thickness, converted into magnetic rock susceptibilities and magnetizations, predict satellite anomalies similar to those observed, with the greatest discrepancies where crustal thickness is least well known. Inversions of satellite anomalies for crustal magnetization assuming a constant thickness magnetized layer also suggest a correlation between vertically integrated magnetization and crustal thickness. Here, we present quantitative comparisons between magnetization models and crustal thickness estimates, using both forward and inverse magnetization models (some including both induced and remanent magnetization), and several determinations of crustal thickness including Mooney et al.'s (2004) database.
DE: 1517 Magnetic anomaly modeling
DE: 1545 Spatial variations (all harmonics and anomalies)
SC: Geomagnetism and Paleomagnetism [GP]
MN: 2005 Joint Assembly