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August 30, 2026Journal of Petrology

Chemical Diversity of Archean Sanukitoids Driven by Variable Sediment Recycling: A Case Study from the North China Craton

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Authors

WYWeibo YangWWWei WangLGLei Gao

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Overview

Petrogenetic modeling reveals variable sediment recycling generated chemical diversity in late Archean sanukitoids, indicating modern-style plate subduction and continental weathering.

Key Points

  • Investigate the petrogenetic origins and geodynamic drivers behind the chemical diversity observed in late Neoarchean sanukitoid suites.
  • Analyzed whole-rock major and trace element geochemistry alongside zircon U–Pb and Lu–Hf isotopic compositions of late Neoarchean (~2560–2491 Ma) gneisses.
  • Performed thermodynamic and trace element modeling to constrain mantle melt sources, recycling percentages, and melting pressure-temperature conditions.
  • Dioritic gneisses were modeled from a mixed mantle source with 6% sediment-derived melts at 1.4–1.9 GPa and 1030–1060°C.
  • Monzodioritic and quartz monzodioritic gneisses required higher sediment melt inputs of 9% (at 2.0–2.1 GPa, 980–1050°C) and 11% (at 2.4–2.8 GPa, 1050–1070°C), respectively.
  • Global compilations confirm that this systematic chemical variation emerged during the Neoarchean, reflecting hot subduction zones coupled with continental emergence and weathering.

Cite This Study

Yang et al. (2026) studied this question.

synapsesocial.com/papers/6a93f1056c1a8fb52e79da61https://doi.org/10.1093/petrology/egag072
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