Yangshan A-Type Granites in the Lower Yangtze River Belt Formed by Ridge Subduction:Radiogenic Ca and Nd Isotopic Constraints

作     者：Jianghao Bai Mingxing Ling Xiaoyong Yang Fang Liu Huangling Gu Zebin Luo Xiaoyan Jiang Zhaofeng Zhang Jianghao Bai;Mingxing Ling;Xiaoyong Yang;Fang Liu;Huangling Gu;Zebin Luo;Xiaoyan Jiang;Zhaofeng Zhang

作者机构：State Key Laboratory of Isotope GeochemistryGuangzhou Institute of GeochemistryChinese Academy of SciencesGuangzhou 510640China CAS Center for Excellence in Deep Earth ScienceGuangzhou 510640China State Key Laboratory of Nuclear Resources and EnvironmentEast China University of TechnologyNanchang 330013China Key Laboratory of Crust-Mantle Materials and EnvironmentsSchool of Earth and Space SciencesUniversity of Science and Technology of ChinaHefei 230026China International Research Center for Planetary ScienceCollege of Earth SciencesChengdu University of TechnologyChengdu 610059China School of City and EnvironmentHunan University of TechnologyZhuzhou 412007China State Key Laboratory of Ore Deposit GeochemistryInstitute of GeochemistryChinese Academy of SciencesGuiyang 550081China University of Chinese Academy of SciencesBeijing 100049China 

出 版 物：《Journal of Earth Science》 (地球科学学刊（英文版）)

年 卷 期：2022年第33卷第3期

页      面：581-590页

核心收录：

学科分类：070902[理学-地球化学] 0709[理学-地质学] 070901[理学-矿物学、岩石学、矿床学] 07[理学] 

基　　金：the State Key Laboratory of Nuclear Resources and Environment,East China University of Technology,Nanchang(No.2020Z03) the National Key R&D Program of China(Nos.2016YFC0600408,2019YFA0708400) the Strategic Priority Research Program of the Chinese Academy of Sciences(No.XDB41020102) 

主　　题：Lower Yangtze River belt(LYRB) aluminous A-type granite Yangshan pluton radiogenic Ca-Nd isotopes ridge subduction geochemistry 

摘      要：The Early Cretaceous aluminous A-type granites in the Lower Yangtze River belt(LYRB)can provide important insights into the Mesozoic magmatism in eastern China,but their origin remains highly *** this study,radiogenic Ca-Nd isotopic analysis was performed for syenite porphyry and alkali-feldspar granite porphyry of the Yangshan pluton,a typical aluminous A-type granitic intrusion in the LYRB,to constrain its source and geodynamic *** results show thatε_(Ca)(126 Ma),ε_(Nd)(126 Ma)and K/Ca_(source) of the syenite porphyry range from-0.24 to+0.96,-7.2 to-6.0,and 0.31 to 1.26,*** corresponding values for the alkali-feldspar granite porphyry range from 0.26 to 0.84,-8.0 to-6.1,and 0.79 to 1.08,*** mixing modeling indicates that they were originated from the same sources with different proportion,namely,a mixing of 50%to 75%Neoproterozoic crust and 50%to 25%asthenospheric *** with previous works,we propose that the Early Cretaceous subduction of the ridge between the Pacific and Izanagi plates was responsible for the formation of the aluminous A-type granites in the LYRB.