New Zircon U-Pb Ages of the Shirenshan Gneiss, North Qinling and Their Geological Implications

查看全文 作　　者：WANG [1]Jingya;REN [1]Shenglian;JIANG [2]Dazhi;DONG [3]Shuwen;LI [1]Jiahao;LI [1]Longming;GE [1]Can;SONG [1]Chuanzhong;HAN [1]Xu;LI [1]Zhenqiang 机构地区：[1]School of Resources and Environmental Engineering, Hefei University of Technology;[2]School of Earth Sciences, Western University;[3]School of Geoscience and Engineering, Nanjing University 出　　处：《Acta Geologica Sinica(English Edition)》索引2019年第93卷第1期,共3页 基　　金：supported by the National Science Foundation of China(grants No.41272213,41572177,41573023,41502193 and 41272222) 摘　　要：The Qinling Orogenic Belt(QOB)is a composite continental orogenic belt that has experienced many tectonic events.The QOB is subdivided into the following three litho-tectonic units:the North Qinling terrane,the Middle Qinling microplate and the South Qinling terrane.The North Qinling Terrane(NQT)underwent destruction and lithospheric thinning during the late Mesozoic,accompanied by extensive magmatic activity and increased surface heat flux,led to large-scale tectonic extension(e.g.,Ren Shenglian et al.,2016).The Shirenshan gneiss is located along the contact between the NQT and the North China Block(Fig.1).Previous studies suggested that it was produced as a result of the northward subduction of the NQT beneath the North China Block(e.g.,Wang Jingya et al.,2017).Therefore,it is significant to study its structural geology,petrology,geochemistry and chronology in order to understand the tectonic settings and the interaction between the Middle Qinling microplate and the North China Block. 关 键 词：The QINLING OROGENIC Belt(QOB) subdivided The NORTH QINLING Terrane(NQT)