【摘要】 渤海湾盆地是一个中、新生代盆地,位于华北克拉通的东部地块上,是华北克拉通破坏的中心区域。渤海湾盆地的结构、构造记录了华北克拉通破坏的构造过程。文章综合10a来据三维地震资料揭示的渤海湾盆地构造,和20a来渤海湾盆地周边华北克拉通区域中、新生代构造和地球化学研究成果,系统提出华北克拉通破坏期间,渤海湾盆地深、浅部的构造机制分别为:中生代浅部构造机制是挤出构造成因,深部构造机制为局部有限的拆沉+底侵模式;新生代构造机制是北西向壳内伸展机制,与印度和欧亚板块碰撞激发的软流圈的东扩远程效应和太平洋俯冲带的跃迁式东撤的联合效应——区域性"西进东退"的深部机制有关。更多还原

【Abstract】 The Bohai Bay Basin is a Mesozoic and Cenozoic basin located on the eastern block of the North China Craton. It is the central region of the destruction of the North China Craton. The architectures and structures of the Bohai Bay Basin recorded the structural processes of destruction of the craton in the Meso-Cenozoic. Combined the structures revealed by 3D seismic profiles across the Bohai Bay Basin in recent 10 years with geochemical results and Meso-Cenozoic structures around the Bohai Bay Basin in recent 20 years,we propose that during the destruction of the North China Craton,the shallow tectonism of the Bohai Bay Basin was the Mesozoic extrusion tectonics and the Cenozoic NW-directed crustal extension. The Cenozoic deep-seated tectonism is the regional far-field eastern propagation of the western asthenosphere due to the India-Eurasia plate collision accompanying with eastern jumping and back-rolling of subduction zones of the Pacific Plate. The Mesozoic deep-seated tectonisms are the local delamination and magma underplating.更多还原