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DOI	10.1016/j.epsl.2020.116378
	Impact melt breccia and surrounding regolith measured by Chang'e-4 rover
	Gou S.; Yue Z.; Di K.; Wang J.; Wan W.; Liu Z.; Liu B.; Peng M.; Wang Y.; He Z.; Xu R.
发表日期	2020
ISSN	0012821X
卷号	544
英文摘要	Chang'e-4 rover discovered a dark greenish and glistening impact melt breccia in a crater during its traverse on the floor of Von Kármán crater within the South Pole Aitken (SPA) basin on the lunar farside. The discovered breccia, being 52 × 16 cm, resembles the lunar impact melt breccia samples 15466 and 70019 that returned by the Apollo missions. It was formed by impact-generated welding, cementing and agglutinating of lunar regolith and breccia. Clods surrounds the breccia-hosting crater were crushed into regolith powders by the rover's wheels, indicating the regolith may be compacted slightly and becomes blocky and friable. Relative mineral fractions are estimated from the in situ measured spectra by a Hapke model-based unmixing algorithm. Unmixing reveals that plagioclase (PLG, 45 ± 6%) is dominant in the regolith, followed by almost equal fractions of pyroxene (PYX, 7 ± 1%) and olivine (OL, 6 ± 2%), indicating the regolith is likely related to noritic rocks. The regolith measured by Chang'e-4 rover was actually a highly mixture of multiple sources, with ejecta from Finsen crater being primary and possible contributions from Alder crater. Finsen and Alder craters are on the margin of the proposed impact melt pool produced by the SPA basin-forming event. Therefore, the ultimate source of the regolith might originate from a differentiated melt pool or from a suite of igneous rocks. © 2020 Elsevier B.V.
关键词	differentiated melt pool Hapke model igneous rocks impact melt breccia noritic rocks relative mineral fractions
英文关键词	Feldspar; Igneous rocks; Lunar surface analysis; Powders; Hapke model; Impact melt; Impact-melt breccias; Lunar regolith; Melt pool; Multiple source; South Pole-Aitken; Unmixing algorithms; Structural geology; algorithm; breccia; crater; igneous rock; lunar crust; Moon; regolith; source rock; Alnus
语种	英语
来源期刊	Earth and Planetary Science Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/202615
作者单位	State Key Laboratory of Remote Sensing Science, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing, 100101, China; State Key Laboratory of Lunar and Planetary Sciences, Macau University of Science and Technology, Macau, China; CAS Center for Excellence in Comparative Planetology, Hefei, 230026, China; Science and Technology on Aerospace Flight Dynamics Laboratory, Beijing Aerospace Control Center, Beijing, 100094, China; Key Laboratory of Space Active Opto-Electronics Technology, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai, 200083, China
推荐引用方式 GB/T 7714	Gou S.,Yue Z.,Di K.,et al. Impact melt breccia and surrounding regolith measured by Chang'e-4 rover[J],2020,544.
APA	Gou S..,Yue Z..,Di K..,Wang J..,Wan W..,...&Xu R..(2020).Impact melt breccia and surrounding regolith measured by Chang'e-4 rover.Earth and Planetary Science Letters,544.
MLA	Gou S.,et al."Impact melt breccia and surrounding regolith measured by Chang'e-4 rover".Earth and Planetary Science Letters 544(2020).