An isostatic model for the Tharsis province, Mars

Details An isostatic model for the Tharsis province, Mars An isostatic model for the Tharsis province, Mars

Oct 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979georl...6..803s&link_type=abstract

Geophysical Research Letters, vol. 6, Oct. 1979, p. 803-806. NSF-supported research;

Physics

15

Domes (Geology), Mars (Planet), Planetary Crusts, Planetary Mantles, Planetary Structure, Cross Sections, Density Distribution, Isostasy, Lithosphere, Thickness, Mars, Models, Mantles, Lithosphere, Stress, Isostasy, Topography, Gravity, Thickness, Density, Parameters, Crust, Chemical Composition, Pressure, Tharsis Province, Comparisons

Scientific paper

A crust-upper mantle configuration is proposed for the Tharsis province of Mars which is isostatic and satisfies the observed gravity data. The model is that of a low density upper mantle compensating loads at both the surface and crust-mantle boundary. Solutions are found for lithospheric thickness greater than about 300 km, for which the stress differences are less than 750 bars. This model for Tharsis is similar to the compensation mechanism under the Basin and Range province of the western United States. These provinces also compare favorably in the sense that they are both elevated regions of extensional tectonics and extensive volcanism.

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