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The continental dynamics of Zhangshiying pluton at the southern margin of the North China Craton: Evidence from geochemical, zircon U-Pb geochronology and Hf isotopic compositions
Alternative Title华北克拉通南缘张士英岩体大陆动力学背景:来自地球化学、锆石U-Pb年龄和Hf同位素的证据
YQ Duan , ZW Zhang , XY Yang
2015
Source PublicationActa Petrologica Sinica
Volume31Issue:7Pages:1995-2008
AbstractThe Zhangshiying pluton is located in the southern margin of the North China Craton. Zircon LA-ICP-MS U-Pb dating for Zhangshiying quartz syenite pluton yield 122. 8 +/- 1. 5Ma. Those quartz syenite are alkaline rocks with SiO2 = 66. 04% similar to 67. 80%, Na2O + K2O = 9. 03% similar to 10. 97%, K2O = 4. 40% similar to 6. 37%, K-2 O/Na-2 O > 1, A/CNK =1. 26 similar to 1. 58, and A/NK = 1. 63 similar to 1. 79. Mg-# ranges from 12. 9 to 39. 4. They are enriched in LREE and depleted in HREE. There is obvious partition of LREE from HREE with (La/Yb)(N) =15. 48 similar to 21. 12, and with slightly negative Eu-abnormal (delta Eu = 0. 54 similar to 0. 99), and it is enriched in LILE e. g. Rb, K, Th, U, and depleted in HFSE, e. g. Nb, Ta, P and Ti. The epsilon(Hf)(t) for quartz syenite ranges from -17. 6 to -13. 9, with t(DM2) of 1.7 similar to 1. 9Ga. Its magma zirconium saturation temperature ranges between 940 similar to 1000 degrees C. Geochemical and isotopic composition indicate that the source of the Zhangshiying pluton is mainly old lower crust and minor juvenile composition. The juvenile composition is mainly from mantle. The pluton was generated under an extensional setting. The extensional setting induced mantle magma upwelling, providing heat and causing the partial melting of the bottom crust. The age of pluton is at the same time of the lithospheric thinning and destruction of the North China craton. Zhang Shiying pluton is the response of this geological event.
Subject Area矿床地球化学
Indexed By其他
Language中文
Document Type期刊论文
Identifierhttp://ir.gyig.ac.cn/handle/352002/6045
Collection矿床地球化学国家重点实验室_矿床地球化学国家重点实验室_期刊论文
Recommended Citation
GB/T 7714
YQ Duan , ZW Zhang , XY Yang. The continental dynamics of Zhangshiying pluton at the southern margin of the North China Craton: Evidence from geochemical, zircon U-Pb geochronology and Hf isotopic compositions[J]. Acta Petrologica Sinica,2015,31(7):1995-2008.
APA YQ Duan , ZW Zhang , XY Yang.(2015).The continental dynamics of Zhangshiying pluton at the southern margin of the North China Craton: Evidence from geochemical, zircon U-Pb geochronology and Hf isotopic compositions.Acta Petrologica Sinica,31(7),1995-2008.
MLA YQ Duan , ZW Zhang , XY Yang."The continental dynamics of Zhangshiying pluton at the southern margin of the North China Craton: Evidence from geochemical, zircon U-Pb geochronology and Hf isotopic compositions".Acta Petrologica Sinica 31.7(2015):1995-2008.
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