Raman-based Characterization of Chang’e-6 Farside Lunar Soil: Insights into Non-mare Ejecta Composition and Lithological Diversity
Author:
Affiliation:

Fund Project:

  • Article
  • |
  • Figures
  • |
  • Metrics
  • |
  • Reference
  • |
  • Related
  • |
  • Cited by
  • |
  • Materials
    Abstract:

    The Chang’e-6 (CE-6) mission returned the first farside lunar soil samples which are of great importance to understand the geological diversity and evolutionary history of the Moon. In this study, we employed a Raman-based automated particle analysis system to investigate the grain size and mineral composition of the CE-6 soil, which are compared with results of the nearside Chang’e-5 (CE-5) soil. Our analyses reveal that the CE-6 soil exhibit small grain size (mean = 4.4 μm) as the CE-5 soil, but markedly higher glass content (37.8 vs. 8.3 vol%), slightly higher plagioclase abundance (39.0 vs. 37.5 vol%), and lower pyroxene (18.4 vs. 39.4 vol%) and olivine (2.3 vs. 9.8 vol%) content. Raman spectroscopic analysis further reveals a marked magnesium enrichment in CE-6 olivines (most grains with Fo of 40-90) compared to their CE-5 counterparts (most Fo < 60). Notably, evident compositional zonation in olivine (Fo of 66 to 47) is observed for a CE-6 lithic clast, which likely represents ejected crustal material with complex magmatic interactions. These findings support that the CE-6 scooped soil contains substantial non-mare components that is limited in the CE-5 sample. Given very low olivine abundance in the CE-6 landing site basalt, the wide range of olivine Fo in CE-6 soil reflects the contribution of olivine-bearing, mafic crustal lithologies such as magnesian-suite and ferroan anorthosite or even of material from the lunar mantle. This study highlights the capability of non-destructive, rapid and simultaneous determination of particle size and mineral composition with Raman-based analytical techniques, which enables direct analyses of complex soil samples and provides new insights into the mineral compositions of landing site basalts and also non-mare ejecta of the near and far sides of the Moon.

    Reference
    Related
    Cited by
Get Citation

Shuang Shi, Xinyi Wang, Kenan Cao, Zhenbing She*, Zaicong Wang*, Qi He, Tianyang Li, Yiheng Li, Jiaqi Zheng, Xu Chen, Long Xiao, Biji Luo, Keqing Zong, Zhaochu Hu, Xiang Wu. Raman-based Characterization of Chang’e-6 Farside Lunar Soil: Insights into Non-mare Ejecta Composition and Lithological Diversity[J]. Atomic Spectroscopy,2025,46(5):484-492.

Copy
Share
Article Metrics
  • Abstract:
  • PDF:
  • HTML:
  • Cited by:
History
  • Received:
  • Revised:
  • Adopted:
  • Online: September 19,2025
  • Published:
Copyright © 2026 Atomic Spectroscopy Press Ltd All rights reserved
Supported by:Beijing E-Tiller Technology Development Co., Ltd.