Crustal Redistribution From Planetary Scale Impacts on Mars

Details Crustal Redistribution From Planetary Scale Impacts on Mars Crustal Redistribution From Planetary Scale Impacts on Mars

Dec 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005agufm.p42a..06m&link_type=abstract

American Geophysical Union, Fall Meeting 2005, abstract #P42A-06

Physics

5420 Impact Phenomena, Cratering (6022, 8136), 6225 Mars

Scientific paper

The Martian hemispheric dichotomy -- expressed as differences in surface elevation, crustal thickness, and surface age between the northern lowlands and the southern highlands -- may have formed through endogenic processes (degree-1 mantle convection) or exogenic processes (a single or multiple large impacts). We examine the hypothesis that a single large impact may have formed the dichotomy. We consider mass redistribution and crater morphology on a spherical surface, and use a Smoothed Particle Hydrodynamics (SPH) model to simulate the impact. We explore the parameter space of impactor size and velocity, and the effects on melt production and crustal disruption are analyzed. A variable particle-sizing scheme to increase resolution at the planetary surface is developed and tested.

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