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JOURNAL OF GEOPHYSICAL RESEARCH,
VOL. 109,
E08009,
10 PP., 2004
doi:10.1029/2003JE002222
Magmatic evolution of impact-induced Martian mantle plumes and the origin of Tharsis
Division of Science and Mathematics, University of Minnesota, Morris, Morris, Minnesota, USA
Department of Physics, New Mexico State University, Las Cruces, New Mexico, USA
Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico, USA
Department of Earth and Planetary Science, University of California, Berkeley, Berkeley, California, USA
Department of Physics, New Mexico State University, Las Cruces, New Mexico, USA
Tharsis province is a major center of Martian volcanic activity characterized by large gravity and topography anomalies. The origin of Tharsis is debated. One hypothesis is that the province was produced by melting associated with a mantle plume from the core-mantle boundary. An alternative hypothesis is that Tharsis formed by a plume associated with an impact. Recent studies have shown that this hypothesis is plausible from a geodynamical point of view and that long-lived impact plumes might play a role in areoid evolution. In this study, the magmatic evolution of impact-induced thermochemical mantle plumes is investigated with fully three-dimensional spherical shell simulations of mantle convection. Melt volumes and emplacement rates predicted by the model can satisfy observational constraints on Tharsis development.
Received 5 December 2003; accepted 21 June 2004; published 31 August 2004.
Citation: (2004), Magmatic evolution of impact-induced Martian mantle plumes and the origin of Tharsis, J. Geophys. Res., 109, E08009, doi:10.1029/2003JE002222.
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