气候变化领域集成服务门户(CCPortal): Fragments Delivered by Secondary Craters at the Chang'E-4 Landing Site

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DOI	10.1029/2020GL087361
	Fragments Delivered by Secondary Craters at the Chang'E-4 Landing Site
	Ding C.; Xiao Z.; Wu B.; Li Y.; Prieur N.C.; Cai Y.; Su Y.; Cui J.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:7
英文摘要	The Chang'E-4 landing site is depleted with boulders seen from both orbit and surface. However, the Yutu-2 rover came across thousands of concreted fragments in and around an abnormally fresh crater that has more elevated northwestern rims. The origin of the fragments is crucial to resolve the provenances of surface materials detected by the rover. The lunar penetrating radar performed two in-and-out scans for the blocky ejecta, revealing that the subsurface materials have indistinguishable radar permittivity with the surrounding regolith. Forward modeling of electromagnetic wave propagation shows that the fragments were not an original component in the subsurface. This crater is among the several fresh craters photoed by the rover, and they are located in an eastern extension ray of the Zhinyu crater. The small craters are likely secondaries of Zhinyu, and the fragments contain a mixture of shattered projectiles and most likely compacted regolith clumps formed during the secondary impacts. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Electromagnetic wave propagation; Orbits; Forward modeling; Landing site; Most likely; Penetrating radar; Secondary impacts; Sub-surface materials; Surface materials; Radar; crater; electromagnetic wave; permittivity; radar; wave propagation
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/170487
作者单位	Planetary Environmental and Astrobiological Laboratory, School of Atmospheric Sciences, Sun Yat-sen University, Zhuhai, China; State Key Laboratory of Lunar and Planetary Sciences, Space Science Institute, Macau University of Science and Technology, Macau, China; Center for Excellence in Comparative Planetology, Chinese Academy of Science, Hefei, China; Department of Land Surveying and Geo-Informatics, The Hong Kong Polytechnic University, Hong Kong; Centre for Earth Evolution and Dynamics, University of Oslo, Oslo, Norway; Key Laboratory of Lunar and Deep Space Exploration, National Astronomical Observatories, Beijing, China
推荐引用方式 GB/T 7714	Ding C.,Xiao Z.,Wu B.,et al. Fragments Delivered by Secondary Craters at the Chang'E-4 Landing Site[J],2020,47(7).
APA	Ding C..,Xiao Z..,Wu B..,Li Y..,Prieur N.C..,...&Cui J..(2020).Fragments Delivered by Secondary Craters at the Chang'E-4 Landing Site.Geophysical Research Letters,47(7).
MLA	Ding C.,et al."Fragments Delivered by Secondary Craters at the Chang'E-4 Landing Site".Geophysical Research Letters 47.7(2020).