|本期目录/Table of Contents|

[1]卜祝源,李玉江,唐磊,等.基于钻孔应变观测约束的2016年新疆呼图壁M6.2地震的发震断层研究*[J].地震研究,2021,(01):64-71.
 BU Zhuyuan,LI Yujiang,TANG Lei,et al.Seismogenic Fault of the 2016 Hutubi M6.2 Earthquake Constraint from the Borehole Strain Observations[J].Journal of Seismological Research,2021,(01):64-71.
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基于钻孔应变观测约束的2016年新疆呼图壁M6.2地震的发震断层研究*(PDF/HTML)

《地震研究》[ISSN:1000-0666/CN:53-1062/P]

卷:
期数:
2021年01期
页码:
64-71
栏目:
出版日期:
2021-01-15

文章信息/Info

Title:
Seismogenic Fault of the 2016 Hutubi M6.2 Earthquake Constraint from the Borehole Strain Observations
作者:
卜祝源李玉江唐磊荆燕陈连旺
(应急管理部国家自然灾害防治研究院,北京 100085)
Author(s):
BU ZhuyuanLI YujiangTANG LeiJING YanCHEN Lianwang
(National Institute of Natural Hazards,Ministry of Emergency Management of China,Beijing 100085,China)
关键词:
呼图壁M6.2地震 钻孔应变观测 同震应变阶 同震应力场 弹性位错理论
Keywords:
Hutubi M6.2 earthquake borehole strain observation coseismic strain step coseismic stress field elastic dislocation theory
分类号:
P315.725
DOI:
-
摘要:
利用北天山地区的钻孔应变观测资料,分析2016年呼图壁M6.2地震同震应变阶跃的张、压性特征。结合余震精定位方法等给出的震源参数,基于弹性位错理论,模拟不同震源参数下的同震应变阶跃的张、压性特征。通过对钻孔应变张、压性的模拟值与实测值进行对比分析,研究呼图壁M6.2地震的发震断层。结果表明:① 震中附近4个四分量钻孔应变台站数据自检性能较好,且多记录到明显的同震应变阶跃,其中,呼图壁、石场、巴伦台应变阶跃较为明显,张、压性变化最大值分别达2.5×10-8和-3.4×10-8; ② 在地震震源参数为293°/64°/90°(走向/倾角/滑动角)、发震断层面倾向北时,钻孔应变张、压性的模拟值与实测值最为吻合,呼图壁M6.2地震的发震断层极有可能为一条倾向北的高角度逆冲型盲断层。本文结果为认识呼图壁M6.2地震的发震构造提供重要力学依据。
Abstract:
In this paper,using the borehole strain observation data in the northern Tien Shan area,we analyzed the tensile-compressive characteristics of the coseismic strain step associated with the Hutubi M6.2 earthquake.Based on different source parameters by aftershock relocation etc.,we simulated the tensile-compressive characteristics of the coseismic strain step by the elastic dislocation theory.Through comparing the tensile-compressive characteristics between the modeled and the observed results,we analyzed the seismogenic fault of the Hutubi M6.2 earthquake.The results show that:① The data of the four four-component borehole strain observation stations near the epicenter have the good self-checking performance,which also record the coseismic strain steps successfully.Among them,the strain steps at Hutubi,Shichang and Baluntai stations are more obvious,and the maximum values of the tension and compression of the coseismic strain steps are 2.5×10-8 and-3.4×10-8,respectively.② When the seismic source parameters are 293 ° /64 ° /90 °(strike /dip /rake)and the fault plane inclines to the north,the simulated values of strain tension and compression of borehole are fit well with the measured values,therefore we induced that the Hutubi M6.2 earthquake most likely occurred on a north-trending high-angle blind thrust fault.The results provide an important mechanical basis for understanding the seismotectonics of the 2016 Hutubi M6.2 earthquake.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2020-03-10
基金项目:国家自然科学基金(41574081,41874116)和中央公益性科研院所基本科研业务专项(ZDJ2019-16,ZDJ2016-21)联合资助.
更新日期/Last Update: 2021-01-15