Scholarlink

<p>Crustal recycling, a fundamental process promoting planetary differentiation, is conventionally attributed to plate tectonics on Earth. However, the mechanisms driving this process in tectonically stagnant regimes remain ambiguous. The heavy sulfur isotope (δ<sup>34</sup>S = 2.0–2.4‰) composition of troilites in the newly-discovered 4.2 Ga high-Al basalt from the South Pole–Aitken (SPA) basin indicates the incorporation of surficial degassed <sup>34</sup>S-enriched crustal materials into the mantle. Numerical simulations of the SPA-forming impact and the induced mantle convection show that uplifted molten crustal materials are exposed to vacuum for about one hour, leading to degassing and enrichment of <sup>34</sup>S, then transported to depths greater than 200 km to provide a hybrid mantle source for high-Al basaltic magmatism. Our integrated petrological geochemical numerical study provides the mechanistic validation of impact-driven crustal recycling on the Moon, fundamentally advancing our capacity to decode early crust–mantle evolution in terrestrial bodies within the inner Solar System.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Giant impacts trigger crustal recycling as witnessed by sulfur isotopes in lunar basalts

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年11月28日

查看全文
  • Huacheng Li,
  • Qian W. L. Zhang,
  • Qiu-Li Li,
  • Zongyu Yue,
  • Yi Chen,
  • Mu-Han Yang,
  • Bin Su,
  • Bingyao Han,
  • Yang-Ting Lin,
  • Xian-Hua Li,
  • Fu-Yuan Wu

摘要

Crustal recycling, a fundamental process promoting planetary differentiation, is conventionally attributed to plate tectonics on Earth. However, the mechanisms driving this process in tectonically stagnant regimes remain ambiguous. The heavy sulfur isotope (δ34S = 2.0–2.4‰) composition of troilites in the newly-discovered 4.2 Ga high-Al basalt from the South Pole–Aitken (SPA) basin indicates the incorporation of surficial degassed 34S-enriched crustal materials into the mantle. Numerical simulations of the SPA-forming impact and the induced mantle convection show that uplifted molten crustal materials are exposed to vacuum for about one hour, leading to degassing and enrichment of 34S, then transported to depths greater than 200 km to provide a hybrid mantle source for high-Al basaltic magmatism. Our integrated petrological geochemical numerical study provides the mechanistic validation of impact-driven crustal recycling on the Moon, fundamentally advancing our capacity to decode early crust–mantle evolution in terrestrial bodies within the inner Solar System.