郯庐断裂带晚中生代演化历史及其对华北克拉通破坏过程的指示

发布时间：2018-01-03 02:19

本文关键词：郯庐断裂带晚中生代演化历史及其对华北克拉通破坏过程的指示　出处：《岩石学报》2016年04期 　论文类型：期刊论文

【摘要】：郯庐断裂带晚中生代的演化历史是华北克拉通破坏过程的重要记录。中侏罗世末(燕山运动A幕),郯庐断裂带局部发生左行平移活动,而华北克拉通上出现了一系列北北东走向的缩短构造,指示了西太平洋伊泽奈崎板块俯冲的开始。晚侏罗世期间,郯庐断裂带没有发生活动,而华北克拉通出现局部伸展与岩浆活动及区域性隆升,应为弧后弱拉张背景。早白垩世初(燕山运动B幕),郯庐断裂带再次发生强烈的左行平移活动,华北克拉通北部与东部出现了一系列近南北向挤压产生的构造,应是鄂霍茨克洋最终关闭与伊泽奈崎板块高速俯冲双重作用的结果。随后的早白垩世期间,华北克拉通在弧后拉张背景下发生峰期破坏,郯庐断裂带呈现为强烈的伸展活动。早白垩世末的区域性挤压作用,结束了华北克拉通的峰期破坏,并使郯庐断裂带再次发生了一期左行平移活动。这期挤压作用出现在太平洋板块接替伊泽奈崎板块这一重大板块调整的背景之中。
[Abstract]:The evolution history of the late Mesozoic in the Tanlu fault zone is an important record of the North China Craton failure process. A series of NNE trending shortening structures appeared in the North China Craton, indicating the beginning of the subduction of the Isenazaki plate in the western Pacific Ocean. During the late Jurassic, there was no activity in the Tanlu fault zone. However, the occurrence of local extension, magmatic activity and regional uplift in the North China Craton is due to the weak extensional background behind the arc, and the strong left-row translation activity occurred again in the early Cretaceous (Yanshanian movement, Tan-Lu fault zone, Tan-Lu fault zone) in the early Cretaceous. In the north and east of the North China Craton, a series of near-north-south compressional structures appeared, which should be the result of the final closure of the Okhotsk Ocean and the high speed subduction of the Isenazaki plate, followed by the early Cretaceous period. In the background of back-arc extension, the North China Craton occurred peak failure, and the Tan-Lu fault zone showed strong extensional activity. The regional compression at the end of the early Cretaceous ended the peak failure of the North China Craton. This period of compression occurred in the background of the Pacific plate replacing the Isenazaki plate as the major plate adjustment.
【作者单位】：合肥工业大学资源与环境工程学院;
【基金】：国家自然科学基金项目(41472186、91414301、41072162)资助
【分类号】：P542
【正文快照】： 合肥工业大学资源与环境工程学院,合肥230009School of Resource and Environmental Engineering,Hefei University of Technology,Hefei 230009,China郯庐断裂带是中国东部规模最大的巨型断裂带。该断裂带南起长江北岸的湖北武穴,经安徽庐江、山东郯城、渤海,过沈阳后分为西

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