首都圈跨断层形变反映的断层活动方式及其成因探讨

地震 ›› 2011, Vol. 31 ›› Issue (4): 77-85.

首都圈跨断层形变反映的断层活动方式及其成因探讨

曹建玲, 张晶, 王辉, 方颖

中国地震局地震预测研究所, 北京 100036

收稿日期:2011-06-14 修回日期:2011-07-25 出版日期:2011-10-31 发布日期:2021-09-09
作者简介:曹建玲(1981-), 女, 甘肃敦煌人, 博士, 主要从事地壳形变与动力学等研究。
基金资助:
科技部国际合作项目(2010DFB20190)和中国地震局地震预测研究所基本科研业务费专项(02092431)资助

Fault Activities and Their Geodynamic Cause Derived from Cross-fault Observation in the Capital Region of China

CAO Jian-ling, ZHANG Jing, WANG Hui, FANG Yin

Institute of Earthquake Science, CEA, Beijing 100036, China

Received:2011-06-14 Revised:2011-07-25 Online:2011-10-31 Published:2021-09-09

摘要/Abstract

摘要： 本文深入分析了首都圈10个跨断层形变场地的流动观测资料, 计算了断层水平滑动量。结果表明, 首都圈断层形变反映的断层活动非常复杂。其中: NW走向的施庄断裂左旋滑动量与时间呈线性关系, 在观测期内左旋滑动速率约为0.08 mm/a; NW走向的墙子路断裂观测期内以左旋滑动为主, 但水平滑动量较施庄断裂小; NE走向的断层在观测期内的活动方式多以左旋滑动为主, 水平滑动量随时间无明显变化规律。在对断层活动观测结果详细分析的基础上, 利用平面弹性有限元模型对首都圈的断层活动进行了模拟研究, 认为该地区主要受张家口—渤海构造带左旋剪切的控制, 且不同走向活动断层以左旋走滑为主。

关键词: 跨断层观测, 断层活动, 数值模拟, 首都圈

Abstract: Temporary cross-fault observation data in the past tens years in the capital region of China is studied in the paper. Distribution of fault strike-slips indicates the complexity of fault activities in the region. Left-lateral strike-slip of the Shizhuang fault, that trending northwest, is positively correlated with time. The mean left-lateral strike-slip rate on the fault is about 0.08 mm/a during the observing period. Left-lateral strike-slip of the Qiangzhilu fault, that is also trending northwest, is less than that of the Shizhuang fault. The northeast trending faults in the capital region are also mainly left-lateral strike-slip faults. Strike-slip on these faults are not clearly correlated with time. Based on studies on fault activities, the regional plane elastic finite element model is constructed to simulate fault activities in the capital region. The simulated results show that fault activities in the capital region are controlled by the left-lateral Zhangjiakou-Bohai zone. Faults with different trendings in the capital region are mainly left-lateral strike-slip faults.

Key words: Fault activity, Cross-fault observation, numerical simulation, Capital region

中图分类号:

P315.7

曹建玲, 张晶, 王辉, 方颖. 首都圈跨断层形变反映的断层活动方式及其成因探讨[J]. 地震, 2011, 31(4): 77-85.

CAO Jian-ling, ZHANG Jing, WANG Hui, FANG Yin. Fault Activities and Their Geodynamic Cause Derived from Cross-fault Observation in the Capital Region of China[J]. EARTHQUAKE, 2011, 31(4): 77-85.

参考文献

[1] 徐锡伟, 吴卫民, 张先康, 等. 首都圈地区地壳最新构造变动与地震[M]. 北京: 科学出版社, 2002.
[2] Savage J C, Burford R O. Geodetic determination of relative plate motion in central California[J]. Journal of Geophysical Research-Solid Earth, 1973, 78(5): 823-845.
[3] Wang H, Liu M, Cao J, et al. Slip rates and seismic moment deficits on major active faults in mainland China[J]. Journal of Geophysical Research-Solid Earth, 2011, 116(B02405). doi:10.1029/2010JB007821.
[4] 唐方头, 邓志辉, 张培震, 等. 由跨断层形变测量反映的华北地块近期断裂活动特征[J]. 中国地震, 2004, 20(4): 399-404.
[5] 焦青, 邱泽华, 范国胜. 北京地区八宝山-黄庄-高丽营断裂的活动与地震[J]. 大地测量与地球动力学, 2005, 25(4): 50-54.
[6] 焦青, 范国胜. 河北文安地震前后首都圈跨断层位移的变化特征[J]. 大地测量与地球动力学, 2007, 27(6): 17-21.
[7] 车兆宏. 首都圈断层活动性研究[J]. 华北地震科学, 1993, 11(2): 23-34.
[8] 薄万举, 罗三明, 王彦, 等. 首都圈长水准与跨断层流动观测资料的综合研究[J]. 山西地震, 1994, 78(3): 19-22.
[9] 黄建平, 石耀霖, 李文静. 从跨断层短基线观测计算地应变的方法探讨以唐山台地形变数据为例[J]. 地球物理学报, 2010, 53(5): 1118-1126.
[10] 唐方头, 张培震, 邓志辉, 等. 华北地区主要断裂带的现今运动特征[J]. 煤田地质与勘探, 2005, 33(1): 4-6.
[11] 张晶, 江在森, 王武星, 等. 边界作用力改变与首都圈形变场变化[J]. 中国地震, 2008, 24(2): 134-141.
[12] 刘峡, 马瑾, 傅容珊, 等. 华北地区现今地壳运动动力学初步研究[J]. 地球物理学报, 2010, 53(6): 1418-1427.
[13] 刘晓霞, 江在森, 武艳强. 利用GPS资料研究燕山-渤海带的运动状态[J]. 大地测量与地球动力学, 2010, 30(1): 21-26.
[14] 张超. 跨断层位移测量与局部断层活动[J]. 地震, 1981, 1(5): 24-25.
[15] 张红艳, 谢富仁, 焦青, 等. 首都圈地区跨断层形变观测和地壳应力场[J]. 地震地质, 2007, 29(4): 706-715.
[16] 黄辅琼, 陈顒, 白长清, 等. 八宝山断层的变形行为与降雨及地下水的关系[J]. 地震学报, 2005, 27(6): 637-646.
[17] 王峻, 刘启元, 陈九辉, 等. 首都圈地区的地壳厚度及泊松比[J]. 地球物理学报, 2009, 52(1): 57-66.
[18] 徐杰, 宋长青, 楚全芝. 张家口—蓬莱断裂带地震构造特征的初步探讨[J]. 地震地质, 1998, 20(2): 146-154.
[19] 杨国华, 江在森, 张风霜, 等. 昆仑山口西8.1级地震对川滇地区地壳水平形变的影响[J]. 中国地震, 2007, 23(1): 56-64.
[20] 陈连旺, 陆远忠, 郭若眉, 等. 边界作用力变化引起的华北地区应力场分区加卸载效应[J]. 大地测量与地球动力学, 2007, 27(6): 9-16.