globalchange  > 气候变化与战略
DOI: 10.1038/s41561-020-0559-4
论文题名:
Early crust building enhanced on the Moon’s nearside by mantle melting-point depression
作者: Elardo S.M.; Laneuville M.; McCubbin F.M.; Shearer C.K.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2020
卷: 13, 期:5
起始页码: 339
结束页码: 343
语种: 英语
英文关键词: concentration (composition) ; crust-mantle boundary ; magmatism ; mantle ; Moon ; reservoir ; source rock ; temperature effect
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.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/169587
Appears in Collections:气候变化与战略

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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

Recommended Citation:
Elardo S.M.,Laneuville M.,McCubbin F.M.,et al. Early crust building enhanced on the Moon’s nearside by mantle melting-point depression[J]. Nature Geoscience,2020-01-01,13(5)
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