Geochronology, Geochemistry and Hf Isotope of the Late Mesozoic Granitoids from the Lushi Polymetal Mineralization Area: Implication for the Destruction of Southern North China Craton

作     者：Yuanyuan Zhai Shuai Gao Qingdong Zeng Shaoxiong Chu Yuanyuan Zhai;Shuai Gao;Qingdong Zeng;Shaoxiong Chu

作者机构：Key Laboratory of Mineral ResourcesInstitute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China Institution of Earth ScienceChinese Academy of SciencesBeijing 100029China University of Chinese Academy of Sciences、Beijing 100049China Linyi Natural Resources and Planning BureauLinyi 276000China 

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

年 卷 期：2020年第31卷第2期

页      面：313-329页

核心收录：

学科分类：081803[工学-地质工程] 08[工学] 0818[工学-地质资源与地质工程] 

基　　金：This work was financially supported by the National Key R&D Program of China(No.2016YFC0600109) the State Key Laboratory of Lithospheric Evolution,IGGCAS(No.SKL-Z201905) This work was also financially supported by the National Natural Science Foundation of China(No.41602099) the State Key Laboratory of Lithospheric Evolution,IGGCAS(No.SPECIAL201606) 

主　　题：Late Mesozoic granitoids geochronology geochemistry Hf isotopic composition southern margin of NCC cratonic destruction 

摘      要：The North China Craton(NCC)is the best example of an Archean craton that has lost its stability in the Late *** the cratonic destruction is generally considered to have occurred in the Eastern Block and reached a peak in the Early Cretaceous,the exact areal extent of cratonic destruction is debated,especially the southern and northern margin of the *** we report geochronology,geochemical and Hf isotopic data of the Late Mesozoic granitoids from Lushi polymetal mineralization area(LPMA)in the southern margin of *** results provide new insights into the destruction in the southern margin of the NCC during the Late *** U-Pb dating indicates that eight granitoids intruded in the Late Jurassic to Early Cretaceous(136.8–154.1 Ma),*** signatures define these granitoids being A-type or I-type granite that formed in an extension *** addition,Hf isotopic compositions of zircons from these granitoids vary in a relatively large range,withεHf(t)values and TDM2 ages ranginge from-26.1 to+15.2 and 215 to 2849 Ma,*** parental magmas were likely derived from diverse sources,including materials of the partial melting of ancient lower crust and mantle-derived mafic magmas in various *** with previous studies on the contemporaneous magma-tectonic activities in circum of NCC,we suggest that the rim of NCC was already unstabilized from the Late Jurassic in the *** subduction of the Paleo-Pacific Plate was the main trigger to the destruction of the southern margin of NCC,which was responsible for the lithospheric extension and thinning,extensive magmatism and mineralization.