Interpretation of a Spatially Continuous Magnetization map of Mars

Details Interpretation of a Spatially Continuous Magnetization map of Mars Interpretation of a Spatially Continuous Magnetization map of Mars

Dec 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003agufmgp21d..07p&link_type=abstract

American Geophysical Union, Fall Meeting 2003, abstract #GP21D-07

Physics

1500 Geomagnetism And Paleomagnetism, 5440 Magnetic Fields And Magnetism

Scientific paper

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.

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