Detrital zircon geochronology and provenance of sediments within the Mesozoic basins:New insights into tectonic evolution of the Qinling Orogen

作     者：Anqi Wang Debin Yang Haotian Yang Maosong Mu Yikang Quan Leran Hao Wenliang Xu Anqi Wang;Debin Yang;Haotian Yang;Maosong Mu;Yikang Quan;Leran Hao;Wenliang Xu

作者机构：College of Earth SciencesJilin UniversityChangchun 130061China Key Laboratory of Mineral Resources Evaluation in Northeast AsiaMinistry of Natural ResourcesChangchun 130061China State Key Laboratory of Isotope GeochemistryGuangzhou Institute of GeochemistryChinese Academy of SciencesGuangzhou 510640China 

出 版 物：《Geoscience Frontiers》 (地学前缘（英文版）)

年 卷 期：2021年第12卷第3期

页      面：343-357页

核心收录：

学科分类：070902[理学-地球化学] 070903[理学-古生物学与地层学(含：古人类学)] 0709[理学-地质学] 07[理学] 0708[理学-地球物理学] 0704[理学-天文学] 

基　　金：financially supported by the Natural Science Foundation of China(41722204,42072063 and 41472052) the National Key Research and Development Program of China(2016YFC0600103) the research grant of State Key Laboratory of Isotope Geochemistry,Guangzhou Institute of Geochemistry,Chinese Academy of Sciences(SKLaBIGKF-18-06) Basic Scientific Research Foundation of Central Universities of China(Jilin University) 

主　　题：Detrital zircons U-Pb dating Hf isotopes Mesozoic Qinling Orogen 

摘      要：Mesozoic sedimentary units within the Nanzhao and Mashiping basins record the paleogeographic and tectonic evolution of the Qinling Orogen(QO).This study uses new detrital zircon U-Pb ages and Hf isotopic data to constrain the timing of deposition and provenance of the Taishanmiao,Taizishan,Nanzhao,and Mashiping formations of the North Qinling Orogen(NQO).The detrital zircons can be split by age peaks into five major groups,including Early Cretaceous,Late Triassic,Early Paleozoic,Neoproterozoic and Paleoproterozoic age *** the basis of the youngest zircon ages and age-diagnostic fossils,we conclude that the Taishanmiao(youngest age of 234 Ma)and Taizishan(216 Ma)formations were deposited during the Late Triassic,whereas the Nanzhao Formation(110 Ma)was deposited during the Early Cretaceous rather than the Late Jurassic as previously *** Mashiping Formation(110 Ma)was also deposited during the Early *** with zircon Hf isotopic compositions,zircons from Late Triassic units were generally derived from the NQO,South Qinling Orogen(SQO),and North China Craton(NCC),with minor amounts derived from the Xing-Meng Orogenic *** sediments within the Nanzhao Formation were mainly derived from the QO,with a minor contribution from the *** Early Cretaceous conglomerates of the Mashiping Formation were generally derived from recycled earlier *** implies that Late Triassic deposition was related to the final closure of the Mianlue Ocean,whereas Early Cretaceous deposition was correlated to the continued intercontinental subduction of the Yangtze Craton beneath the *** change in provenance within these Mesozoic sediments suggests the QO underwent two periods of significant uplift,which was a process generated sediments that were deposited in a series of basins of this area.