The formation of terrains antipodal to major impacts

Details The formation of terrains antipodal to major impacts The formation of terrains antipodal to major impacts

Sep 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991icar...93..159w&link_type=abstract

Icarus (ISSN 0019-1035), vol. 93, Sept. 1991, p. 159-168. Research supported by NASA.

Astronomy and Astrophysics

Astronomy

24

Computer Programs, Icy Satellites, Meteorite Collisions, Planetary Cores, Satellite Surfaces, Structural Properties (Geology), Waveforms, Astronomical Models, Mercury (Planet), Moon, Scaling, Seismology, Tethys

Scientific paper

The SALE, or Simplified Arbitrary Lagrangian Eulerian code is presently used to calculate the antipodal pressures generated by large impacts on icy satellites and planets of various compositions and core sizes. While in a high density core/lower density mantle planet there is a refraction of the incident pressure wave away from the antipode by the core, resulting in a low antipodal pressure, a planet with a low velocity core with a higher-wave speed mantle will focus the waveform to maximize antipodal pressure. Specific impact basins on the moon, Mercury, and several icy satellites are modeled to ascertain whether the impacts were capable of producing the observed antipodal features.

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