The Lunar Cataclysm: Reality or “Mythconception”?
The Lunar Cataclysm: Reality or “Mythconception”?
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月球大灾变：现实还是“神话”？
DOI：
10.2113/gselements.5.1.23
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发表时间：
2009
期刊：
影响因子：
4.5
通讯作者：
M. Norman
中科院分区：
文献类型：
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作者：
M. Norman
月球的撞击历史具有重大意义，远远超出了简单地挖掘干燥和无生命世界的表面。月球撞击角砾岩的年龄分布激发了大约40亿年前小行星和彗星灾难性涌入的想法，并激发了行星动力学的新模型。晚期的撞击可能调节了早期地球和火星的环境条件，并影响了生物进化的过程。然而，大灾变假说是有争议的，而且远未得到证实。月球探测者面临着确定古代撞击盆地的绝对年龄和撞击物来源的艰巨任务。
The impact history of the Moon has significant implications that go far beyond simply excavating the surface of a dry and lifeless world. The age distribution of lunar impact breccias inspired the idea of a catastrophic influx of asteroids and comets about 4 billion years ago and motivated new models of planetary dynamics. A late bombardment may have regulated environmental conditions on the early Earth and Mars and influenced the course of biologic evolution. The cataclysm hypothesis is controversial, however, and far from proven. Lunar explorers face the difficult task of establishing absolute ages of ancient impact basins and the sources for the impactors.