气候变化领域集成服务门户(CCPortal): Dating individual several-km lunar impact craters from the rim annulus in region of planned Chang'E-5 landing: Poisson age-likelihood calculation for a buffered crater counting area

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DOI	10.1016/j.epsl.2021.117031
	Dating individual several-km lunar impact craters from the rim annulus in region of planned Chang'E-5 landing: Poisson age-likelihood calculation for a buffered crater counting area
	Michael G.G.; Yue Z.; Gou S.; Di K.
发表日期	2021
ISSN	0012821X
卷号	568
英文摘要	The CE-5 lander was designed to retrieve a 2 m core of regolith for return to Earth. We attempt to date the most significant impact craters in the region of its landing using the statistics of superposed craters, anticipating the possibility of the presence of impact ejecta in the soil sample. The craters formed after the mare surface and would have made significant mass contributions across the region so that, if ejecta components can be recognised and dated by radioisotope methods, there is the potential to establish links to source craters. The seven largest craters in the region range in size from 3–6 km, and we attempt to date them using the annulus method first proposed by Baldwin (1985). A unit covering most of the vicinity is estimated to be 3.3 Ga old, so that we expect the seven craters to be randomly spaced over this time interval. Superposed craters in the size range 20-80 m within an annulus around the craters' rims suggest ages of <50 Ma in all cases. We interpret that these times reflect the lifetime only of structures in the upper 20 m of regolith. The population of superposed craters >250 m in diameter, however, is shown to be consistent with the age of the unit, and is thus also able to provide information on the age of individual several-km craters. The age likelihood method based on Poisson statistics, which maximises the timing information that can be obtained from small-area crater populations, is extended to cover so-called buffered crater counts. Although, in this study, we are only able to constrain the ages of the selected craters to a limited degree, the method is generally applicable to buffered counts and should substantially improve their precision elsewhere. © 2021
关键词	buffered crater counting Chang'E-5 chronology Oceanus Procellarum Poisson statistics
英文关键词	Buffered crater counting; Chang'E-5; Chronology; Impact craters; Impact ejecta; Lunar impact craters; Oceani procellarum; Poisson statistic; Soil sample; Time interval; Population statistics; age determination; Chang'e; crater; geochronology; Moon; Poisson ratio; radiocarbon dating; regolith
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/203222
作者单位	Planetary Sciences and Remote Sensing, Institute of Geological Sciences, Freie Universitaet Berlin, Malteser Strasse 74-100, Haus D, Berlin, 12249, Germany; State Key Laboratory of Remote Sensing Science, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing, 100101, China; CAS Center for Excellence in Comparative Planetology, Hefei, 230026, China; State Key Laboratory of Lunar and Planetary Sciences, Macau University of Science and Technology, Macau, China
推荐引用方式 GB/T 7714	Michael G.G.,Yue Z.,Gou S.,et al. Dating individual several-km lunar impact craters from the rim annulus in region of planned Chang'E-5 landing: Poisson age-likelihood calculation for a buffered crater counting area[J],2021,568.
APA	Michael G.G.,Yue Z.,Gou S.,&Di K..(2021).Dating individual several-km lunar impact craters from the rim annulus in region of planned Chang'E-5 landing: Poisson age-likelihood calculation for a buffered crater counting area.Earth and Planetary Science Letters,568.
MLA	Michael G.G.,et al."Dating individual several-km lunar impact craters from the rim annulus in region of planned Chang'E-5 landing: Poisson age-likelihood calculation for a buffered crater counting area".Earth and Planetary Science Letters 568(2021).