DOI: 10.1038/ngeo1841
论文题名: Impact bombardment of the terrestrial planets and the early history of the Solar System
作者: Fassett C.I. ; Minton D.A.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2013
卷: 6, 期: 7 起始页码: 520
结束页码: 524
语种: 英语
Scopus关键词: accretion
; cratering
; Moon
; planetary landform
; solar system
英文摘要: During the first billion years of Solar System evolution, following planetary accretion, the rate of impact cratering was substantially higher than over the past 3.5 Gyr. However, the causes, magnitude and evolution of the early impact flux remain unknown. In particular, uncertainty persists about whether the largest impact basins on the Moon and the other terrestrial planets formed from a cataclysmic bombardment in a narrow window of time about 3.9 Gyr ago, as initially suggested by the lunar sample collection, or over a more extended period. Recent observations relating to this so-called Late Heavy Bombardment imply that the window of bombardment was not as narrow and intense as originally envisaged. Nevertheless, numerical simulations suggest that the rocky bodies left behind after planetary accretion are insufficient in number to form the youngest large impact basins 4.0 to 3.7 Gyr ago. One viable hypothesis for the formation of these basins is the delivery of impactors to the inner Solar System following the migration of the giant planets, but this scenario also faces challenges. Clarifying the magnitude and length of the Late Heavy Bombardment has implications across the full range of planetary geosciences, from understanding the dynamical evolution of the Solar System to surface conditions on the terrestrial planets early in their history. © 2013 Macmillan Publishers Limited. All rights reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/106748
Appears in Collections: 气候减缓与适应 科学计划与规划
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作者单位: Department of Astronomy, Mount Holyoke College, South Hadley, MA 01075, United States; Department of Earth, Atmospheric, and Planetary Sciences, Purdue University, West Lafayette, IN 47907, United States
Recommended Citation:
Fassett C.I.,Minton D.A.. Impact bombardment of the terrestrial planets and the early history of the Solar System[J]. Nature Geoscience,2013-01-01,6(7)