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Volume 34 Issue 6
Dec 2023
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Journal of Earth Science  > 2023  >  34(6): 1704-1716.
Yun Zhou, Yongshan Zhao, Yongfeng Cai, Qiaofan Hu, Ce Wang. Permian-Triassic Magmatism in the Qin-Fang Tectonic Belt, SW China: New Insights into Tectonic Evolution of the Eastern Paleo-Tethys. Journal of Earth Science, 2023, 34(6): 1704-1716. doi: 10.1007/s12583-020-1111-6
Citation: Yun Zhou, Yongshan Zhao, Yongfeng Cai, Qiaofan Hu, Ce Wang. Permian-Triassic Magmatism in the Qin-Fang Tectonic Belt, SW China: New Insights into Tectonic Evolution of the Eastern Paleo-Tethys. Journal of Earth Science, 2023, 34(6): 1704-1716. doi: 10.1007/s12583-020-1111-6
shu

Permian-Triassic Magmatism in the Qin-Fang Tectonic Belt, SW China: New Insights into Tectonic Evolution of the Eastern Paleo-Tethys

doi: 10.1007/s12583-020-1111-6
  • 1.

    Collaborative Innovation Center for Exploration of Nonferrous Metal Deposits and Efficient Utilization of Resources, Guangxi Key Laboratory of Hidden Metallic Ore Deposits Exploration, Guilin University of Technology, Guilin 541004, China

  • 2.

    China Nonferrous Metals (Guilin) Geology and Mining Co., Ltd., Guilin 541004, China

  • 3.

    School of Marine Sciences, Sun Yat-sen University, Zhuhai 519082, China

More Information
  • Corresponding author: Yongfeng Cai, caiyongfeng@glut.edu.cn
  • Received Date: 15 Aug 2020
  • Accepted Date: 20 Oct 2020
    • Available Online: 08 Dec 2023
  • Issue Publish Date: 30 Dec 2023
    Abstract

  • The granites of ambiguous geodynamic mechanism in the Qin-Fang tectonic belt (SW China) were studied in detail based on petrological, element geochemical, zircon U-Pb geochronological, and Hf isotopic data. LA-ICPMS U-Pb analyses on zircon yield ages of 248–245 Ma for the granites from the Qin-Fang tectonic belt. The geochemical data show that they are high-K, calc-alkaline, and peraluminous series. Their εHf(t) values are from -14.01 to -7.75 with two-stage model ages of 1.74–1.43 Ga. These data, integrated with low Al2O3/TiO2, Rb/Sr, Rb/Ba, and (Na2O + K2O)/(FeOT + MgO + TiO2) ratios, and high CaO/Na2O ratios for the granite, suggest an origin from psammite source which was contaminated by mantle-derived components. These observations, in combination with the age data and stratigraphic records in the Jinshajiang, Ailaoshan, and Hainan Island areas suggest that the granites were formed in a post-collision tectonic setting. The Qin-Fang tectonic belt was likely a branched ocean basin of the eastern Paleo-Tethys.

     

    • Electronic Supplementary Materials: Supplementary materials (ESM I Figs. S1–S4, ESM II Tables S1–S2) are available in the online version of this article at https://doi.org/10.1007/s12583-020-1111-6.
    Conflict of Interest
    The authors declare that they have no conflict of interest.
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