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<p>Water is the one of most precious resources for planetary utilisation. Lunar nearside impact glass beads (IGBs) have been demonstrated to contain abundant solar wind-derived water (SW-H<sub>2</sub>O); however, little is known about its farside counterpart. Here, we report the water abundances and hydrogen isotope compositions and their distribution in farside IGBs collected by the Chang’e-6 mission to investigate the role of IGBs in the lunar surface water cycle. Farside IGBs are found to have water abundances of ~10–1,070 μg.g<sup>−1</sup> with hydrogen isotopes (δD) ranging from –988‰ to &gt;2000‰ and display typical SW-H<sub>2</sub>O hydration profiles. The SW-H<sub>2</sub>O hydration depths in farside IGBs are strikingly shallower than in nearside IGBs. Moreover, the hydration profiles are only found in mare IGBs, with none observed in non-mare IGBs, indicating that SW-H<sub>2</sub>O hydration in IGBs is likely composition dependent. These findings indicate that SW-H<sub>2</sub>O storage of IGBs exhibits a dichotomy distribution in lunar soils.</p>

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Lunar dichotomy in surface water storage of impact glass beads

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年5月29日

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  • Huicun He,
  • Sen Hu,
  • Liang Gao,
  • Ruiying Li,
  • Jialong Hao,
  • Ross N. Mitchell,
  • Kai Lu,
  • Yubing Gao,
  • Linxi Li,
  • Mengfan Qiu,
  • Zhan Zhou,
  • Wei Yang,
  • Shuhui Cai,
  • Yi Chen,
  • Lihui Jia,
  • Qiu-Li Li,
  • Hejiu Hui,
  • Yangting Lin,
  • Xian-Hua Li,
  • Fu-Yuan Wu

摘要

Water is the one of most precious resources for planetary utilisation. Lunar nearside impact glass beads (IGBs) have been demonstrated to contain abundant solar wind-derived water (SW-H2O); however, little is known about its farside counterpart. Here, we report the water abundances and hydrogen isotope compositions and their distribution in farside IGBs collected by the Chang’e-6 mission to investigate the role of IGBs in the lunar surface water cycle. Farside IGBs are found to have water abundances of ~10–1,070 μg.g−1 with hydrogen isotopes (δD) ranging from –988‰ to >2000‰ and display typical SW-H2O hydration profiles. The SW-H2O hydration depths in farside IGBs are strikingly shallower than in nearside IGBs. Moreover, the hydration profiles are only found in mare IGBs, with none observed in non-mare IGBs, indicating that SW-H2O hydration in IGBs is likely composition dependent. These findings indicate that SW-H2O storage of IGBs exhibits a dichotomy distribution in lunar soils.