Volume 31 Issue 5
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WANG X L，DING N，XIONG D Y，2025. TTG petrogenesis and early plate tectonics[J]. Journal of Geomechanics，31（5）：1044−1062 doi: 10.12090/j.issn.1006-6616.2025150
Citation: WANG X L，DING N，XIONG D Y，2025. TTG petrogenesis and early plate tectonics[J]. Journal of Geomechanics，31（5）：1044−1062 doi: 10.12090/j.issn.1006-6616.2025150
shu

TTG petrogenesis and early plate tectonics

doi: 10.12090/j.issn.1006-6616.2025150
  • 1.

    State Key Laboratory of Critical Earth Material Cycling and Mineral Deposits, Nanjing 210023, Jiangsu, China

  • 2.

    School of Earth Sciences and Engineering, Nanjing University, Nanjing 210023, Jiangsu, China

Funds:  This research is financially supported by the National Natural Science Foundation for Distinguished Young Scholars of China (Grant No. 42025202).
More Information
  • Author Bio:

    王孝磊，南京大学教授、博士生导师，中国矿物岩石地球化学学会理事、岩浆岩专业委员会主任，《岩石学报》副主编，《地质力学学报》等期刊编委。获国家自然科学基金委杰出青年和优秀青年基金、中国矿物岩石地球化学学会侯德封奖。主要从事岩石学和前寒武纪地质学研究，在Nature、Science Advances、Nature Communications、National Science Review、Geology等发表学术论文140余篇，参与出版教材2部，部分成果获教育部自然科学奖一等奖（排名第1）和二等奖（排名第2），2021—2024连续四年入选爱思唯尔“中国高被引学者”榜单

  • Received: 2025-10-10
  • Revised: 2025-10-28
  • Accepted: 2025-10-29
    • Available Online: 2025-10-31
  • Published: 2025-10-28
    Abstract
  •   Objective  TTG (tonalite-trondhjemite-granodiorite) suites, major constituents of Archean continental crust, serve as key archives for understanding the formation and evolution of the early continental crust and related plate tectonic regimes and mechanisms.   Methods  This work presents a systematic review on the petrological definitions, classification schemes, experimental petrology, source characteristics, and genetic mechanisms of TTGs, with a particular focus on the relationship between TTG petrogenesis and early plate tectonics. Traditionally, high-pressure TTGs have been interpreted as evidence for Archean subduction. However, emerging paradigms, including the "mush model" and geodynamic numerical simulations, suggest that the compositional diversity of TTG can be reasonably explained by late-stage magmatic processes (e.g., crystal-melt separation) and that TTG can also be formed through non-subduction mechanisms (e.g., crustal dripping, mantle plumes).   Results  Recent applications of non-traditional stable isotopes (e.g., B, Si, K, Ca), big data analytics, and machine learning in the early Earth studies provided novel insights into tracing TTG source characteristics (such as the incorporation of supracrustal materials) and early tectonic settings.   Conclusion  This review suggests that future TTG research should further integrate petrology, geochemistry, and numerical modeling, enhance the identification of primary melt compositions, develop more robust geochemical indicators to effectively discriminate between different mechanisms (e.g., subduction vs. mantle plumes), and conduct multi-scale, interdisciplinary studies in key areas.  Significance  These efforts are crucial for deepening our understanding of the tectonic evolution of the early Earth and the mechanisms of continental crust growth.

     

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