Response of Stagnant-Lid Convection to Sudden Dichotomy Formation

Details Response of Stagnant-Lid Convection to Sudden Dichotomy Formation Response of Stagnant-Lid Convection to Sudden Dichotomy Formation

May 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004agusm.p33b..04s&link_type=abstract

American Geophysical Union, Spring Meeting 2004, abstract #P33B-04

Physics

5430 Interiors (8147), 5455 Origin And Evolution, 8121 Dynamics, Convection Currents And Mantle Plumes, 8450 Planetary Volcanism (5480)

Scientific paper

Did the thermal event responsible for the Tharsis volcanic plateau occur as a consequence of a sudden formation of the Martian crustal dichotomy? Using a 3-D spherical mantle convection model with temperature-dependent viscosity, we explore the effect of the sudden emplacement of hemispheric-scale crustal thickness variations on stagnant-lid mantle convection. Thickened crust in the "southern" hemisphere of the model causes insulation of that hemisphere which may effect the underlying mantle circulation. This leads to a transient, regional-scale partial melting event sufficient to generate the Tharsis rise during the first ~0.5-1.0 billion years following the formation of the crustal dichotomy.

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