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<p>The Moon is depleted in moderately volatile elements compared with Earth, likely due to high-temperature processes during its formation. How this depletion evolved and the role of later surface processes remain unclear. Here we report high-precision zinc isotope measurements of basalt fragments and soils collected by the Chang’e-5 (CE-5) mission from a ~ 2-billion-year-old volcanic region. The basalts have zinc isotope values similar to those of Apollo mare basalts, consistent with global volatile loss during the Moon-forming impact. In contrast, soils show lighter zinc isotope signatures than Apollo soils and no variation with depth, suggesting little effect from space weathering. Instead, the data indicate that low-temperature volcanic outgassing deposited isotopically light zinc on the surface. These results show that young lunar soils can retain evidence of late-stage volcanic degassing, distinct from the intense volatile loss that shaped the early Moon.</p>

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Zinc isotopes record lunar magmatic outgassing and surface processes in different Chang’e-5 samples

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年1月21日

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  • Ziwei Wang,
  • Haolan Tang,
  • Yingnan Zhang,
  • Frédéric Moynier,
  • Ji Shen,
  • Huimin Yu,
  • Fang Huang,
  • Liping Qin

摘要

The Moon is depleted in moderately volatile elements compared with Earth, likely due to high-temperature processes during its formation. How this depletion evolved and the role of later surface processes remain unclear. Here we report high-precision zinc isotope measurements of basalt fragments and soils collected by the Chang’e-5 (CE-5) mission from a ~ 2-billion-year-old volcanic region. The basalts have zinc isotope values similar to those of Apollo mare basalts, consistent with global volatile loss during the Moon-forming impact. In contrast, soils show lighter zinc isotope signatures than Apollo soils and no variation with depth, suggesting little effect from space weathering. Instead, the data indicate that low-temperature volcanic outgassing deposited isotopically light zinc on the surface. These results show that young lunar soils can retain evidence of late-stage volcanic degassing, distinct from the intense volatile loss that shaped the early Moon.