Identification of Secondary Craters Based on Distribution of Iron Element on Lunar Surface

被引：0
|
作者：
Xu X. [1 ,2 ]
Ye L. [3 ]
Kang Z. [1 ,2 ]
Jiang W. [4 ]
Luan D. [1 ,2 ]
Zhang D. [1 ,2 ]
机构：
[1] School of Land Science and Technology, China University of Geosciences(Beijing), Beijing
[2] Subcenter of International Cooperation and Research on Lunar and Planetary Exploration, Center of Space Exploration, Ministry of Education, Beijing
[3] Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing
[4] Beijing Mucheng House Surveying and Mapping Technology Service Co. Ltd, Beijing
来源：
Wuhan Daxue Xuebao (Xinxi Kexue Ban)/Geomatics and Information Science of Wuhan University | 2022年 / 47卷 / 02期
基金：
中国国家自然科学基金;
关键词：
Crater size⁃frequency distribution(CSFD); Iron element; Multispectral image; Secondary crater;
D O I：
10.13203/j.whugis20200345
中图分类号：
学科分类号：
摘要：
Objectives: To determine the geologic age of the lunar surface is the foundation of the research on the formation and evolution of the Moon, and also the foundation of the inversion process of lunar geological events. Lack of lunar rock and soil samples limits the range of geological units that can be used for isotopic dating. Therefore, the dating using crater size⁃frequency distribution (CSFD) is employed to obtain the geologic ages of broader regions on the lunar surface. However, the presence of secondary craters will lead to a deviation in geologic age which is obtained by CSFD method. Thus, secondary craters should be eliminated to get a more accurate geologic age. Methods: This paper presents a method to identify secondary craters based on the distribution of iron element on lunar surface. First, the method assumes that the iron content in secondary craters is close to that in lunar regolith. Then, band ratio method is utilized to acquire the iron content. Finally, secondary craters are distinguished from primary ones in terms of the difference of iron content between craters and lunar regolith. Results: The effectiveness and robustness of the proposed method are tested by using the multispectral data obtained by multi⁃band imager of the Japanese Selene Mission. The experimental results show that the geologic age deviation compared with the known isotopic dated ones is less than 0.1 Ga, which shows good consistency. Conclusions: Compared with other secondary craters identification methods, the proposed method is proven to be more effective and robust. © 2022, Editorial Board of Geomatics and Information Science of Wuhan University. All right reserved.
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页码：287 / 295
页数：8
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