Tectonic evolution of Mars

Details Tectonic evolution of Mars Tectonic evolution of Mars

Dec 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979jgr....84.7934w&link_type=abstract

Journal of Geophysical Research, vol. 84, Dec. 30, 1979, p. 7934-7939.

Physics

53

Mars Surface, Planetary Craters, Planetary Evolution, Planetology, Tectonics, Gravitational Effects, Isostasy, Planetary Cores, Soil Erosion, Temperature Effects, Volcanology

Scientific paper

A tectonic model for the evolution of Mars is proposed which accounts for the Tharsis bulge and the topographically low and lightly cratered northern third of the planet. The model involves convective overturn of the interior with subcrustal erosion and foundering. Once convection ceased, segregated dense core material collected into a gravitationally unstable layer or mass which eventually overturned to form the core. Lateral motions of the mantle associated with the overturn underplated lighter materials beneath Tharsis to cause isostatic rise and radial fracturing. The thermal effects, including the gravitational energy of core formation beneath Tharsis, were slower to reach the surface but produced a long-lived volcanic phase.

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