Rock Abundance and Crater Density in the Candidate Chang'E-5 Landing Region on the Moon

Bo Wu, Jun Huang, Yuan Li, Yiran Wang, Jin Peng

Research output: Journal article publicationJournal articleAcademic researchpeer-review

23 Citations (Scopus)

Abstract

Chang'E-5 is China's first lunar sample-return mission, which will be launched in 2019. Understanding the distribution of rocks and craters in the candidate landing region is important for selecting suitable landing sites and studying the surface geology. This paper first separately investigates rock abundance and crater density in the candidate landing region, then provides a joint analysis of them, for the purposes of identifying potential hazards for safe landing and their geological implications. The results indicate that in the region, rocks are mostly concentrated around rocky ejecta craters. About 90% of the region has a rock abundance (the fractional area covered by rocks) of less than 1%. The average crater density is about 250 craters (≥ 100 m in diameter) per 100 km 2 ; on average, 13.5% of the region is covered by craters. The surface ages of geologic units in the region estimated using crater size-frequency distribution indicate that the eastern part of the region is younger than the western part. The joint analysis of rock abundance and crater density identifies local areas that are relatively unfavorable for safe landing. The joint analysis also indicates an exponential relationship between overall rock abundance and crater density, and a roughly linear relationship between overall rock abundance and surface age. Furthermore, the joint analysis indicates an inverse correlation between rock abundance and the relative maturation of craters. The presented research and results will be helpful for identifying suitable landing sites for the Chang'E-5 lander. They also provide fresh insights into lunar surface geology.

Original languageEnglish
Pages (from-to)3256-3272
Number of pages17
JournalJournal of Geophysical Research: Planets
Volume123
Issue number12
DOIs
Publication statusPublished - Dec 2018

Keywords

  • Chang'E-5
  • crater density
  • landing site
  • Moon
  • rock abundance
  • surface age

ASJC Scopus subject areas

  • Geophysics
  • Forestry
  • Oceanography
  • Aquatic Science
  • Ecology
  • Water Science and Technology
  • Soil Science
  • Geochemistry and Petrology
  • Earth-Surface Processes
  • Atmospheric Science
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science
  • Palaeontology

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