气候变化领域集成服务门户(CCPortal): Early crust building enhanced on the Moon’s nearside by mantle melting-point depression

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DOI	10.1038/s41561-020-0559-4
	Early crust building enhanced on the Moon’s nearside by mantle melting-point depression
	Elardo S.M.; Laneuville M.; McCubbin F.M.; Shearer C.K.
发表日期	2020
ISSN	17520894
起始页码	339
结束页码	343
卷号	13 期号:5
英文摘要	The Moon’s Earth-facing hemisphere hosts a geochemically anomalous region, the Procellarum KREEP Terrane, which is widely thought to have provided radiogenic heat for mantle melting from ~3.9 to ~1 billion years ago. However, there is no agreement on such a link between this region and the earliest pulse of post-differentiation crust-building magmatism on the Moon at ~4.37 billion years ago; whether this early magmatism was global or regional has been debated. Here we present results of high-temperature experiments that show the nearside geochemical anomaly may have caused asymmetric early crust building via mantle melting-point depression. Our results demonstrate that the anomalous enrichment in incompatible elements of this nearside reservoir dramatically lowers the melting temperature of the source rock for these magmas and may have resulted in 4 to 13 times more magma production under the nearside crust, even without any contribution from radioactivity. From thermal numerical modelling, we show that radiogenic heating compounds this effect and may have resulted in an asymmetric concentration of post-magma-ocean crust building on the lunar nearside. Our findings suggest that the nearside geochemical anomaly has influenced the thermal and magmatic evolution of the Moon over its entire post-differentiation history. © 2020, The Author(s), under exclusive licence to Springer Nature Limited.
英文关键词	concentration (composition); crust-mantle boundary; magmatism; mantle; Moon; reservoir; source rock; temperature effect
语种	英语
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/206768
作者单位	Department of Geological Sciences, University of Florida, Gainesville, FL, United States; Geophysical Laboratory, Carnegie Institution for Science, Washington, DC, United States; Department of Physics, Astronomy, and Geosciences, Towson University, Towson, MD, United States; Earth-Life Science Institute, Tokyo Institute of Technology, Tokyo, Japan; NASA Johnson Space Center, Houston, TX, United States; Institute of Meteoritics, University of New Mexico, Albuquerque, NM, United States
推荐引用方式 GB/T 7714	Elardo S.M.,Laneuville M.,McCubbin F.M.,等. Early crust building enhanced on the Moon’s nearside by mantle melting-point depression[J],2020,13(5).
APA	Elardo S.M.,Laneuville M.,McCubbin F.M.,&Shearer C.K..(2020).Early crust building enhanced on the Moon’s nearside by mantle melting-point depression.Nature Geoscience,13(5).
MLA	Elardo S.M.,et al."Early crust building enhanced on the Moon’s nearside by mantle melting-point depression".Nature Geoscience 13.5(2020).