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Jurassic Tectonic Revolution in China and New Interpretation of the “Yanshan Movement”
作者姓名:DONG Shuwen  ZHANG Yueqiao  LONG Changxing  YANG Zhenyu  JI Qiang  WANG Tao  HU Jianming  CHEN Xuanhua
作者单位:DONG Shuwen~(1,*) ZHANG Yueqiao~(2,1) LONG Changxing~1 YANG Zhenyu~(1,2) JI Qiang~3 WANG Tao~3 HU Jianming~1 CHEN Xuanhua~1 1 Institute of Geomechanics,Chinese Academy of Geological Sciences,Beijing 100081 2 Department of Earth Sciences,Nanjing University,Nanjing,Jiangsu 210093 3 Institute of Geology,Chinese Academy of Geological Sciences,Beijing 100037
基金项目:中国地质调查局资助项目,国家自然科学基金,国家重点基础研究发展计划(973计划),The Sinopec project
摘    要:With acquisition and accumulation of new data of structural geological investigations and high-resolution isotopic dating data, we have greatly improved our understanding of the tectonic events occurring in eastern China during the period from the Late Jurassic to Early Cretaceous and may give a new interpretation of the nature, timing and geodynamic settings of the “Yanshan Movement”. During the Mid-Late Jurassic (165±5 Ma), great readjustment of plate amalgamation kinematics took place in East Asia and the tectonic regime underwent great transformation, thus initiating a new tectonic regime in which the North China Block was the center and different plates converged toward it from the north, east and southwest and forming the “East Asia convergent” tectonic system characterized by intracontinental subduction and orogeny. As a consequence, the crustal lithosphere of the East Asian continent thickened considerably during the Late Jurassic, followed immediately by Early Cretaceous substantial lithospheric thinning and craton destruction featured by drastic lithospheric extension and widespread volcano-magmatic activities, resulting in a major biotic turnover from the Yanliao biota to Jehol Biota. Such a tremendous tectonic event that took place in the continent of China and East Asia is the basic connotation of the “Yanshan Movement”. In the paper, according to the deformation patterns, geodynamic settings and deep processes, the “Yanshan Movement” is redefined as the Late Jurassic East Asian multi-directional plate convergent tectonic regime and its associated extensive intracontinental orogeny and great tectonic change that started at -165±5 Ma. The substantial lithospheric attenuation in East China is considered the post-effect of the Yanshanian intracontinental orogeny and deformation.

关 键 词:构造地质学  晚侏罗纪  造山运动  中国
收稿时间:9/3/2007 12:00:00 AM
修稿时间:2008/1/31 0:00:00

Jurassic Tectonic Revolution in China and New Interpretation of the "Yanshan Movement"
Authors:DONG Shuwen  ZHANG Yueqiao  LONG Changxing  YANG Zhenyu  JI Qiang  WANG Tao  HU Jianming  CHEN Xuanhua
Institution:[1]Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081 [2]Department of Earth Sciences, Nanjing University, Nanjing, Jiangsu 210093 [3]Institute of Geology, Chinese Academyof Geological Sciences, BeUing 100037
Abstract:With acquisition and accumulation of new data of structural geological investigations and high-resolution isotopic dating data, we have greatly improved our understanding of the tectonic events occurring in eastern China during the period from the Late Jurassic to Early Cretaceous and may give a new interpretation of the nature, timing and geodynamic settings of the "Yanshan Movement". During the Mid-Late Jurassic (165±5 Ma), great readjustment of plate amalgamation kinematics took place in East Asia and the tectonic regime underwent great transformation, thus initiating a new tectonic regime in which the North China Block was the center and different plates converged toward it from the north, east and southwest and forming the "East Asia convergent"tectonic system characterized by intracontinental subduction and orogeny. As a consequence, the crustal lithosphere of the East Asian continent thickened considerably during the Late Jurassic,followed immediately by Early Cretaceous substantial lithospheric thinning and craton destruction featured by drastic lithospheric extension and widespread volcano-magmatic activities, resulting in a major biotic turnover from the Yanliao biota to Jehol Biota. Such a tremendous tectonic event that took place in the continent of China and East Asia is the basic connotation of the "Yanshan Movement". In the paper, according to the deformation patterns, geodynamic settings and deep processes, the "Yanshan Movement" is redefined as the Late Jurassic East Asian multi-directional plate convergent tectonic regime and its associated extensive intracontinental orogeny and great tectonic change that started at ~165±5 Ma. The substantial lithospheric attenuation in East China is considered the post-effect of the Yanshanian intracontinental orogeny and deformation.
Keywords:Late Jurassic  Yanshan Movement  East Asian  multi-directional convergence  intracontinental orogeny  lithospheric thickening and thinning
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