Basin-forming impacts: Reconnaissance modeling

被引：105
作者：
Ivanov B.A. [1 ]
Melosh H.J. [2 ,4 ]
Pierazzo E. [3 ]
机构：
[1] Institute for Dynamics of Geospheres, Russian Academy of Sciences, Moscow
[2] Lunar and Planetary Laboratory, University of Arizona, 429E Space Sciences Building, Tucson
[3] Planetary Science Institute, Tucson, AZ 85719
[4] Department of Earth and Atmospheric Sciences, Civil Engineering Building, Purdue University, West Lafayette, IN 47907
来源：
Special Paper of the Geological Society of America | 2010年 / 465卷
关键词：
D O I：
10.1130/2010.2465(03)
中图分类号：
学科分类号：
摘要：
This paper is a current status report on a project focused on understanding the formation of large impact basins on terrestrial planetary bodies. A set of preliminary two-dimensional axisymmetric numerical models of collisions of asteroids with diameters from 150 to 800 km with the Moon, Mars, and Mercury illustrates the main mechanical effects of planetary-scale impacts. The target body is modeled on a regular grid with a spatial resolution of 5-10 km. Self-gravity is included in the hydrocode. The main consequence of such an impact is a deep melt pool at the center of the basin. Model results are tentatively compared with known impact basins such as South Pole-Aitken on the Moon and Hellas on Mars. © 2010 The Geological Society of America. All rights reserved.
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页码：29 / 49
页数：20
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