气候变化领域集成服务门户(CCPortal): Terrestrial magma ocean origin of the Moon

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DOI	10.1038/s41561-019-0354-2
	Terrestrial magma ocean origin of the Moon
	Hosono N.; Karato S.-I.; Makino J.; Saitoh T.R.
发表日期	2019
ISSN	17520894
卷号	12 期号:6
英文摘要	A conceptual framework for the origin of the Moon must explain both the chemical and the mechanical characteristics of the Earth–Moon system to be viable. The classic concept of an oblique giant impact explains the large angular momentum and the lack of a large iron-rich core to the Moon, but in this scenario it is difficult to explain the similarity in the isotopic compositions of the Earth and Moon without violating the angular momentum constraint. Here we propose that a giant, solid impactor hit the proto-Earth while it was covered with a magma ocean, under the conventional collision conditions. We perform density-independent smoothed particle hydrodynamic collision simulations with an equation of state appropriate for molten silicates. These calculations demonstrate that, because of the large difference in shock heating between silicate melts and solids (rocks), a substantial fraction of the ejected, Moon-forming material is derived from the magma ocean, even in a highly oblique collision. We show that this model reconciles the compositional similarities and differences between the Moon and Earth while satisfying the angular momentum constraint. © 2019, The Author(s), under exclusive licence to Springer Nature Limited.
语种	英语
scopus关键词	angular momentum; conceptual framework; equation of state; heating; magma; Moon; ocean; silicate
来源期刊	Nature Geoscience
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/124662
作者单位	Yokohama Institute for Earth Sciences, Japan Agency for Marine-Earth Science and Technology, Yokohama, Kanagawa, Japan; RIKEN Center for Computational Science, Kobe, Hyogo, Japan; Department of Geology and Geophysics, Yale University, New Haven, CT, United States; Department of Planetology, Kobe University, Kobe, Hyogo, Japan; Earth-Life Science Institute, Tokyo Institute of Technology, Meguro-ku, Tokyo, Japan
推荐引用方式 GB/T 7714	Hosono N.,Karato S.-I.,Makino J.,et al. Terrestrial magma ocean origin of the Moon[J],2019,12(6).
APA	Hosono N.,Karato S.-I.,Makino J.,&Saitoh T.R..(2019).Terrestrial magma ocean origin of the Moon.Nature Geoscience,12(6).
MLA	Hosono N.,et al."Terrestrial magma ocean origin of the Moon".Nature Geoscience 12.6(2019).