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<p>Central Jilin Province (Changchun–Jilin section, Northeast China) is part of the Xar Moron–Changchun–Yanji suture zone, and late Palaeozoic granitoids are widely exposed. These rocks are important for deciphering the timing of magmatism, petrogenesis and tectonic evolution in the region. LA–ICP‒MS (Laser ablation-inductively coupled plasma mass spectrometer) U–Pb dating of a K-feldspar granite and quartz monzonite yielded ages of 257&#xa0;Ma and 265&#xa0;Ma, respectively. The geochemical and zircon Hf isotope data of K-feldspar granite and quartz monzonite reveal that these rocks resemble peraluminous A-type granites and adakite-like (high Na<sub>2</sub>O (4.24–4.28&#xa0;wt%), Sr (755 × 10<sup>–6</sup>–810 × 10<sup>–6</sup>), Sr/Y (66.97–85.38) and (La/Yb)<sub>N</sub> (15.3–21.1) values, with low Y (9.14 × 10<sup>–6</sup>–15.2 × 10<sup>–6</sup>) and Yb (1.08 × 10<sup>–6</sup>–1.48 × 10<sup>–6</sup>) values) I-type granites. By integrating mineralogical, geological and geochemical data, we concluded the following: the K-feldspar granite formed by partial melting of juvenile crust, the quartz monzonite formed from thickened lower crust, and the parental magmas experienced fractional crystallization. Therefore, K-feldspar granite and quartz monzonite formed in subduction-related extensional and compressional settings, respectively, marking the transition between extension and compression during the closure of the Paleo-Asian Ocean (PAO) (265–257&#xa0;Ma).</p> Graphical abstract <p></p>

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Origin of late Permian granites in central Jilin Province, NE China: insights into the closure of the Paleo-Asian Ocean and their tectonic significance

  • 期刊论文

  • 发表日期：

    2026年1月28日

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  • Zhitao Xu,
  • Liying Sun,
  • Xiqing Ye,
  • Jingqiao Feng,
  • Mengmeng Li,
  • Shanshan Li

摘要

Central Jilin Province (Changchun–Jilin section, Northeast China) is part of the Xar Moron–Changchun–Yanji suture zone, and late Palaeozoic granitoids are widely exposed. These rocks are important for deciphering the timing of magmatism, petrogenesis and tectonic evolution in the region. LA–ICP‒MS (Laser ablation-inductively coupled plasma mass spectrometer) U–Pb dating of a K-feldspar granite and quartz monzonite yielded ages of 257 Ma and 265 Ma, respectively. The geochemical and zircon Hf isotope data of K-feldspar granite and quartz monzonite reveal that these rocks resemble peraluminous A-type granites and adakite-like (high Na2O (4.24–4.28 wt%), Sr (755 × 10–6–810 × 10–6), Sr/Y (66.97–85.38) and (La/Yb)N (15.3–21.1) values, with low Y (9.14 × 10–6–15.2 × 10–6) and Yb (1.08 × 10–6–1.48 × 10–6) values) I-type granites. By integrating mineralogical, geological and geochemical data, we concluded the following: the K-feldspar granite formed by partial melting of juvenile crust, the quartz monzonite formed from thickened lower crust, and the parental magmas experienced fractional crystallization. Therefore, K-feldspar granite and quartz monzonite formed in subduction-related extensional and compressional settings, respectively, marking the transition between extension and compression during the closure of the Paleo-Asian Ocean (PAO) (265–257 Ma).

Graphical abstract