Effect of Topography Degradation on Crater Size-Frequency Distributions: Implications for Populations of Small Craters and Age Dating

doi:10.1002/2017GL075298

	Effect of Topography Degradation on Crater Size-Frequency Distributions: Implications for Populations of Small Craters and Age Dating
	Xie, Minggang 1; Zhu, Meng-Hua 1; Xiao, Zhiyong 1,2; Wu, Yunzhao 3,4; Xu, Aoao 1
刊名	GEOPHYSICAL RESEARCH LETTERS
	2017-10-28
卷号	44 期号:20 页码:10171-10179
ISSN号	0094-8276
DOI	10.1002/2017GL075298
通讯作者	Xie, Minggang(xieminggang13@gmail.com) ; Zhu, Meng-Hua(mhzhu@must.edu.mo)
英文摘要	Whether or not background secondary craters dominate populations of small impact craters on terrestrial bodies is a half-century controversy. It has been suggested that small craters on some planetary bodies are dominated by background secondary craters based partly on the steepened slope of crater size-frequency distribution (CSFD) toward small diameters, such as the less than similar to 1 km diameter crater population on the lunar mare. Here we show that topography degradation enlarges craters and increases CSFD slopes with time. When topography degradation is taken into account, for various-aged crater populations, the observed steep CSFD at small diameters is uniformly consistent with an originally shallower CSFD, whose slope is undifferentiated from the CSFD slope estimated from near-Earth objects and terrestrial bolides. The results show that the effect of topography degradation on CSFD is important in dating planetary surfaces, and the steepening of CSFD slopes is not necessarily caused by secondary cratering, but rather a natural consequence of topography degradation.
WOS关键词	INNER SOLAR-SYSTEM ; LUNAR IMPACT CRATERS ; SECONDARY CRATERS ; SURFACE ; MARS ; MOON ; MERCURY ; EQUILIBRIUM ; CONSTRAINTS ; VARIABILITY
WOS研究方向	Geology
语种	英语
出版者	AMER GEOPHYSICAL UNION
WOS记录号	WOS:000416761600011
内容类型	期刊论文
源URL	[http://libir.pmo.ac.cn/handle/332002/22085]
专题	中国科学院紫金山天文台
通讯作者	Xie, Minggang; Zhu, Meng-Hua
作者单位	1.Macau Univ Sci & Technol, Lunar & Planetary Sci Lab, Macau, Peoples R China 2.China Univ Geosci, Sch Earth Sci, Planetary Sci Inst, Wuhan, Hubei, Peoples R China 3.Chinese Acad Sci, Purple Mt Observ, Key Lab Planetary Sci, Nanjing, Jiangsu, Peoples R China 4.Jiangsu Ctr Collaborat Innovat Geog Informat Res, Nanjing, Jiangsu, Peoples R China
推荐引用方式 GB/T 7714	Xie, Minggang,Zhu, Meng-Hua,Xiao, Zhiyong,et al. Effect of Topography Degradation on Crater Size-Frequency Distributions: Implications for Populations of Small Craters and Age Dating[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(20):10171-10179.
APA	Xie, Minggang,Zhu, Meng-Hua,Xiao, Zhiyong,Wu, Yunzhao,&Xu, Aoao.(2017).Effect of Topography Degradation on Crater Size-Frequency Distributions: Implications for Populations of Small Craters and Age Dating.GEOPHYSICAL RESEARCH LETTERS,44(20),10171-10179.
MLA	Xie, Minggang,et al."Effect of Topography Degradation on Crater Size-Frequency Distributions: Implications for Populations of Small Craters and Age Dating".GEOPHYSICAL RESEARCH LETTERS 44.20(2017):10171-10179.