| 呼图壁地区震源机制解及构造应力场特征分析 |
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| 引用本文： | 李艳永,王成虎,杨佳佳.呼图壁地区震源机制解及构造应力场特征分析[J].大地测量与地球动力学,2018,38(12):1246-1250. |
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| 作者姓名： | 李艳永 王成虎 杨佳佳 |
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| 摘 要： | 基于新疆测震台网记录的数字地震波形，运用CAP方法测定呼图壁地区2010-01-15~2017-01-02共50次MS≥3.0地震的震源机制解，同时结合早期23次MS≥3.0地震的震源机制解数据，应用MSATSI软件反演研究区时空应力场。结果表明，研究区应力结构类型表现为逆断型，整个区域主压应力P轴近NNE向且倾角较小，说明整个呼图壁地区应力场以NNE向水平挤压作用为主要特征。从空间上看，东部的水平挤压作用更为显著；从时间上看，2010~2016年受到更为显著的NNE向应力场控制，反映了研究区在不同时段应力场的调整变化，但没有改变该区域最大主压应力轴呈NNE向的总体特征，说明整个呼图壁地区可能主要受一种较稳定的NNE向应力场控制。
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| 关 键 词： | 呼图壁地区 震源机制解 应力场 |
The Focal Mechanism Solution and Stress Field Inversion of Earthquakes Along Hutubi |
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| LI Yanyong,WANG Chenghu,YANG Jiajia.The Focal Mechanism Solution and Stress Field Inversion of Earthquakes Along Hutubi[J].Journal of Geodesy and Geodynamics,2018,38(12):1246-1250. |
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| Authors: | LI Yanyong WANG Chenghu YANG Jiajia |
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| Abstract: | Using the seismic waveform data recorded by regional seismic network of Xinjiang and the method of CAP, we calculate the focal mechanism of 50 earthquakes with magnitude MS≥3.0 occurring in Hutubi during from Jan.15,2010 to Jan. 2,2017. Then, we analyze the types and the regional features of the focal mechanism of earthquakes in Hutubi. Based on the data of the above focal mechanism solutions, we invert the stress field of Hutubi area using MSATSI software. The result shows that the main compressional stress P axis is near NNE, indicating that the region stress field is mainly under action of the level extrusion of NNE. The horizontal compression is more obvious in the eastern part of the study area. Stress field is more significant for NNE direction during 2010 to 2016, but does not change the general characteristics of the maximum principal stress axis in the region, indicating that the study area may be mainly affected by a stable stress field of NNE. |
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| Keywords: | Hutubi area focal mechanism solution stress field inversion |
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