标题:
郯庐断裂带形成演化与大别–苏鲁造山带的关系探讨Study on the Relation between the Formation and Evolution of Tanlu Fault Belt and Dabie-Sulu Orogenic Belt
作者:
李洪奎, 陈莉, 韩廷宝, 耿科, 禚传源, 梁太涛
关键字:
大别–苏鲁造山带, 郯庐断裂带, 板块碰撞, 左行平移, 体制转换Dabie-Sulu Orogenic Belt, Tan-Lu Fault Zone, Plate Collision, Left-Lateral Horizontal Displacement, Tectonic Configuration Transform
期刊名称:
《Advances in Geosciences》, Vol.6 No.1, 2016-02-29
摘要:
大别–苏鲁造山带是三叠纪华北板块和扬子板块碰撞形成的高压–超高压变质带，其形成演化大致经历了强烈碰撞、俯冲和折返三个阶段，在三叠纪晚期完成最终拚合。作为中国东部巨型断裂构造系统的郯庐断裂带，受控于特提斯构造域向滨太平洋构造域转换和太平洋板块俯冲机制的动力学背景，发生大规模左行平移并将大别–苏鲁超高压变质带错开，左行平移的最大距离在300 km左右，同时将郯庐左行剪切走滑断裂发育历史划分为五个发育阶段，重现了从特提斯体制向太平洋体制的复杂历史转化过程，也在相当程度上反映了我国东部大陆边缘的动力学特征。
Dabie-Sulu orogenic belt is a HP-UHP metamorphic belt formed by the collision of Triassic North China plate and the Yangtze plate. Its formation and evolution have experienced three stages, such as intense collision stage, subduction stage and exhumation stage. In the late Triassic, final regis-tration has been completed. As a giant fault structure system in eastern China, Tanlu fault belt is controlled by dynamic background of transformation from Tethyan tectonic domain to the marginal Pacific tectonic domain, and subduction of the Pacific plate. Thus, large scale sinistral strike- slip happened and staggered Dabie-Sulu UHP metamorphic belt. The maximum distance of sinistral strike-slip is about 300 km. At the same time, development history of Tanlu sinistral shear strike-slip fault is divided into five development stages. It not only reappears complex history of transformation process from Tethys system to the Pacific system, but also reflects dynamics cha-racteristics of continental margin in Eastern China.