【摘要】 中国东部新构造期活动强烈,前人对该时期NE向构造已有很多研究,但NWW向构造研究程度较低。本文以张家口-蓬莱断裂带为例,从几何学、运动学、动力学及地震活动性四个方面对中国东部的NWW向活动断裂带进行了分析。结果表明,中国东部的NWW向活动断裂带具有左行走滑的运动性质,并控制了第四纪盆地左阶雁列的展布样式;NWW向活动断裂带是孕震断裂,诱发了多次地震活动。在动力学上,这些断裂带是板缘的不同段落变形在板内不同块体间响应调节的产物,且在周边板块的联合作用下,华北和华南南部NWW向断裂可能印度-欧亚板块碰撞的影响占主导,而东北和华南东部NWW向断裂可能太平洋板块俯冲的影响占主导。更多还原

【Abstract】 The NE-trending fault zones in East China have been well known.However,the NWW-trending fault zones are poorly known.Especially these NWW-trending fault zones are characterized by neotectonic activities.Taking the Zhangjiakou-Penglai Fault Zone as an example,this paper carries out a detailed analysis of the NWW-trending active faults in geometry,kinematics,dynamics and earthquake activities.The results show that these NWW-trending faults are sinistral strike-slipping faults controlling some en echelon Quaternary pull-apart basins.These faults have triggered plenty of earthquakes as the seismogenic structures.All these structural features result from the differential activities in dynamics among the neighboring blocks as a response to the various deformations of different segments along the plate boundaries.Under the combining effect of the other surrounding plates around China,the NWW-trending faults in North China and the south part of South China are possibly dominated by the collision of the Indian Plate to the Eurasian Plate.However,the NWW-trending faults in Northeast China and the east part of South China are possibly dominated by the subduction of the Pacific Plate.更多还原