Nature of the Orientale and Crisium Impacts

Details Nature of the Orientale and Crisium Impacts Nature of the Orientale and Crisium Impacts

Mar 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996lpi....27.1147s&link_type=abstract

Lunar and Planetary Science, volume 27, page 1147

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Craters: Impact, Craters: Scaling, Impacts: Oblique, Mascons, Uplift: Central

Scientific paper

The Crisium and Orientale impact basins contain positive gravity anomalies quite different in size relative to their massif-ring diameters. Earlier studies suggested that contrasting basin mascons could reflect the evolving lunar thermal history, but recent Clementine data indicate other causes also must contribute to their gravity signatures. Impact angles provide a reasonable alternative explanation for these differences. Such a perspective underscores the effect of different scaling relations controlling the penetration, excavation, and modification stages of crater formation that become increasingly evident at large scales. Further, the proposed trajectories affect depths of excavation, asymmetric extents of crustal failure, and sequence of ejecta emplacement.

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