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July 3, 2026International Geology Review

Petrogenesis of late Mesoproterozoic granitoids in the Miyi–Yuanmou region: implications for the tectonomagmatic evolution of SW China

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Authors

QYQiulian YuZCZailin ChenXCXianfeng Cheng

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Overview

Randomized trial shows the geochemical evolution of granitoids in SW China, indicating complex magma sources and interactions.

Key Points

  • This study aims to clarify the origins and magma source affinities of Late Mesoproterozoic granitoids in the Miyi–Yuanmou region.
  • Analyzed geochemical and isotopic data of granitoids from the region.
  • Identified trace element distribution patterns and isotopic compositions of Nd and Hf.
  • Conducted modeling of trace elements to investigate magma sources.
  • Granitoids show OIB-like geochemical affinities and widespread εNd(t) values (−9.9 to +4.4), pointing to ancient continental crust as the main source.
  • Notable decoupling of Nd-Hf isotopes indicates varying levels of interaction between crust and mantle during magma formation.
  • Granitoids were formed by binary mixing of lower continental crust melts and mantle-derived magmas.

Cite This Study

Yu et al. (2026) studied this question.

synapsesocial.com/papers/6a4750f45c29257aa257865ahttps://doi.org/10.1080/00206814.2026.2694639
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