HR: 11:50h
AN: GP21D-07    [PDF]
TI: Interpretation of a Spatially Continuous Magnetization map of Mars
AU: * Purucker, M
EM: purucker@geomag.gsfc.nasa.gov
AF: Raytheon ITSS at Geodynamics Branch, Goddard Space Flight Center, Greenbelt, MD 20771 United States
AU: Whaler, K
EM: kathy.whaler@ed.ac.uk
AF: School of Geosciences, University of Edinburgh, Edinburgh, Scotland United Kingdom
AB: Utilizing the aerobraking, science phasing, and mapping orbit data set compiled by Cain et al. (2003) for their degree 90 spherical harmonic model, we derive a spatially continuous magnetization model of Mars in a 40 km thick layer. We solve for the magnetization direction and strength, while minimizing the RMS magnetization to ensure a unique model. While the strength is highly variable, and depends on the fit to the data, the directions are robust. The model preserves the resolution of the original data set, which is dominated by observations in two altitude ranges (100-150 km, and 400 km). We see several new features in our map, including additional detail in the highly magnetized southern hemisphere region. We will concentrate our structural and tectonic interpretation in the Cimmeria region, where a continuous channel of constant steep inclination is seen.
DE: 1500 GEOMAGNETISM AND PALEOMAGNETISM
DE: 5440 Magnetic fields and magnetism
SC: Geomagnetism and Paleomagnetism [GP]
MN: 2003 Fall Meeting