| 冀中坳陷北部河西务断层结构及新近纪以来的活动特征分析 |
| |
| 引用本文： | 毛黎光,田建章,张宏伟,张传宝,王鑫,肖安成.冀中坳陷北部河西务断层结构及新近纪以来的活动特征分析[J].高校地质学报,2019,25(4):578. |
| |
| 作者姓名： | 毛黎光 田建章 张宏伟 张传宝 王鑫 肖安成 |
| |
| 作者单位： | 中国矿业大学(北京)地球科学与测绘工程学院,北京,100083;中国石油华北油田分公司,任丘,062550;东方地球物理公司,涿州,072750;浙江大学地球科学学院,杭州,310027 |
| |
| 摘 要： | 河西务断层是渤海湾盆地冀中坳陷北部地区一条重要的控盆断裂，新近纪-第四纪时期渤海湾盆地整体进入热沉降
阶段后，该断层仍然存在构造活动，2018年在河北永清县发生的地震就是由该断层的活动所引发。文章利用地震数据对河
西务断层的结构特征和新近纪以来的活动特征进行分析，结果表明，河西务断层新近纪以来具有右旋走滑的张扭特征，主
断层在剖面上具有负花状结构，平面上具有分段性，北段和南段兼具右旋走滑和拉张的特征，中段则主要表现为右旋走滑
特征。运动学模型表明，这种分段差异性主要由各段主断层走向和块体走滑运动方向的夹角所决定。
|
| 关 键 词： | 渤海湾盆地 冀中坳陷 河西务断层 活动断层 地震灾害 |
Structures and Evolution of Hexiwu Fault,Northern Jizhong Depression since the Neogene |
| |
| MAOLiguang,TIANJianzhang,ZHANGHongwei,ZHANGChuanbao,WANGXin,XIAOAncheng.Structures and Evolution of Hexiwu Fault,Northern Jizhong Depression since the Neogene[J].Geological Journal of China Universities,2019,25(4):578. |
| |
| Authors: | MAOLiguang TIANJianzhang ZHANGHongwei ZHANGChuanbao WANGXin XIAOAncheng |
| |
| Abstract: | The Hexiwu Fault is an important boundary fault in the northern Jizhong Depression of the Bohai Bay Basin. It remained
active during the Neogene and Quaternary, when the Bohai Bay Basin entered the thermal depression stage. The earthquake occurred
in Yongqing, Hebei province at 2018 was triggered by activities of this fault. This paper analyzes the structures of the Hexiwu Fault and
its activities during the Neogene and Quaternary using seismic data. Results show that the fault has been dextral transtensional since
the Neogene. It presents negative-flower structures on profiles and is segmented on map view, with the northern and southern segments
of dextral transtensional deformation and the middle segment being dominated by dextral deformation. A kinematic model suggests that
those segmentation features may be determined by the angles between fault orientation of each segment and the dextral shear direction
in this region. |
| |
| Keywords: | Bohai Bay Basin Jizhong Depression Hexiwu Fault active faults earthquake hazard |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《高校地质学报》浏览原始摘要信息 |
|
点击此处可从《高校地质学报》下载全文 |
|
