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Space weathering on the lunar nearside and farside constrained from Si isotopes

Author

Listed:
  • Hui-Yan Zhang

    (University of Science and Technology of China)

  • Hui-Min Yu

    (University of Science and Technology of China
    University of Science and Technology of China)

  • Hao-Lan Tang

    (University of Science and Technology of China
    University of Science and Technology of China
    Deep Space Exploration Laboratory)

  • Yu-Chao Lin

    (University of Science and Technology of China)

  • Zicong Xiao

    (University of Science and Technology of China)

  • Lin Yang

    (University of Science and Technology of China)

  • Jin-Ting Kang

    (University of Science and Technology of China
    University of Science and Technology of China)

  • Ji Shen

    (University of Science and Technology of China
    University of Science and Technology of China)

  • Liping Qin

    (University of Science and Technology of China
    University of Science and Technology of China
    Deep Space Exploration Laboratory)

  • Fang Huang

    (University of Science and Technology of China
    University of Science and Technology of China
    Deep Space Exploration Laboratory)

Abstract

Over long timescales, space weathering processes can modify the compositions of surface materials on the Moon. To assess the effects of space weathering of lunar soils, we study Si isotopes of Chang’E-5 (CE-5) and Chang’E-6 (CE-6) returned samples, and lunar meteorites. Here we show that both bulk soils from CE-5 and CE-6 exhibit heavier Si isotopic compositions than the basalt clasts within the soils and lunar meteorites, indicating that the space weathering obviously increase δ30Si of lunar soils. Furthermore, the CE-6 soil from the lunar farside has heavier Si isotopic values than the average of CE-5 soils from the nearside, suggesting that the CE-6 soil has experienced a higher space weathering degree than the CE-5 soils. This increased weathering degree could be attributed to either a longer weathering period or stronger micrometeorite impacts on CE-6 soil from farside compared to CE-5 soils from nearside.

Suggested Citation

  • Hui-Yan Zhang & Hui-Min Yu & Hao-Lan Tang & Yu-Chao Lin & Zicong Xiao & Lin Yang & Jin-Ting Kang & Ji Shen & Liping Qin & Fang Huang, 2025. "Space weathering on the lunar nearside and farside constrained from Si isotopes," Nature Communications, Nature, vol. 16(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:16:y:2025:i:1:d:10.1038_s41467-025-59577-6
    DOI: 10.1038/s41467-025-59577-6
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