渤海海峡及邻区活动断裂分布及其活动特征  

THE DISTRIBUTION AND ACTIVITIES OF ACTIVE FAULTS IN THE BOHAI STRAIT AND ITS ADJACENT AREAS

作　　者：刘忠亚[1,2] 彭轩明[2] 赵铁虎[2] 孙军[2] 

机构地区：[1]中国地质科学院研究生部,北京100037 [2]中国地质调查局青岛海洋地质研究所,青岛266071

出　　处：《海洋地质与第四纪地质》2016年第1期87-97,共11页Marine Geology & Quaternary Geology

基　　金：国家海洋地质专项工作项目(GZH201200504)

摘　　要：利用高分辨率地震勘探方法所采集到的资料,对渤海海峡及两侧的活动断裂分布和活动特征进行了分析。渤海海峡内主要受到NNE和NW向两组断裂构造的控制,且这两个方向上的主要断裂均在晚更新世以来有过活动,经过与地震资料比对,发现在这两组方向断裂交汇处活动性尤其强烈,历史上已经引起过较大的地震,并有继续活动的可能。此外,经过分析认为这两组断裂的分布和活动特征,是由新生代以来印度板块和太平洋板块的活动所致,且研究区内NNE向断裂和NW向断裂都参与了发震,但是主要的控震构造还是NNE向断裂。A high-resolution seismic survey has been carried out to reveal the distribution pattern and activity characteristics of the active faults in the Bohai strait and adjacent Areas.The survey has found that the NNE-trending faults and NW-trending faults control the tectonic movement of the Bohai Strait,and the main faults in both directions have been active since Late Pleistocene.By comparing it with the earthquake data,we found that those faults are more active in the junction areas and have caused great earthquakes in history and have the possibility to happen again in the future.A further analysis of the distribution and activity characteristics of these faults shows that they are caused by movement of the Indian plate and the Pacific plate.The analysis also suggests that both the NW-trending and the NNE-trending faults are seismogenic faults,but only NNE-trending faults can control the distribution of earthquakes.

关 键 词：活动断裂 活动特征 地震 渤海海峡 

分 类 号：P736.1[天文地球—海洋地质]