Impact cratering on Venus - Physical and mechanical models

Details Impact cratering on Venus - Physical and mechanical models Impact cratering on Venus - Physical and mechanical models

Oct 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992jgr....9716167i&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 97, no. E10, p. 16,167-16,181.

Physics

38

Cratering, Meteorite Craters, Planetary Craters, Planetary Geology, Venus Surface, Atmospheric Effects, Impact Melts, Venus Atmosphere

Scientific paper

Various phenomena related to impact cratering processes specific to the Venusian environment are investigated through laboratory, theoretical and numerical simulations. Model results are presented for the influence of the atmosphere on high-velocity meteoroids, the influence of high-velocity meteoroids on the atmosphere, the influence of atmospheric shock waves on the Venusian surface, and the influence of high crustal temperature on impact melting and melt cooling. New modeling techniques based on the 2D Free-Lagrangian method show that an icy body of 1-km radius may reach the bottom of the Venusian atmosphere in a partially dispersed state and form an impact crater approximately 20 km in diameter. Modeling shows that a significant wake of low density will form behind the meteoroid and have an important influence on crater formation and ejecta distributions.

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