Mars Crustal Thickness Models from Mars50c and GMM-1

Details Mars Crustal Thickness Models from Mars50c and GMM-1 Mars Crustal Thickness Models from Mars50c and GMM-1

Mar 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996lpi....27..789l&link_type=abstract

Lunar and Planetary Science, volume 27, page 789

Physics

Crusts: Structure, Gravity, Mars, Topography

Scientific paper

Planetary crustal thickness models can be produced from the assumption that gravity anomalies are due only to variations in surface and crust/mantle topography and crust and mantle densities are laterally constant. Assuming plausible values for crust (2.7 to 3.1) and mantle (3.0 to 3.5 gm/cc) density and mean crustal thickness (50 to 150 km), we generated such models for Mars using both Mars50c and GMM-1. Except for Tharsis these are nearly identical and show more spatial detail than earlier gravity models. We show how crustal thickness based on Mars50c depend on average crustal thickness and crust/mantle density contrast. A reasonable model for Mars has average thickness about 65 km if the density contrast is 0.5 (crust 3.0, mantle 3.5) gm/cc. This model satisfies the "constraint" on crustal thickness from the possible detection of a marsquake by Viking Lander II.

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