| 由多个地震的震源机制解推断喜马拉雅弧形山系的构造应力场 |
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| 引用本文： | 李松林,岳华峰,宋占龙.由多个地震的震源机制解推断喜马拉雅弧形山系的构造应力场[J].地球物理学报,1986,29(4):419-423. |
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| 作者姓名： | 李松林 岳华峰 宋占龙 |
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| 作者单位： | 国家地震局地球物理勘探大队, 郑州 |
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| 摘 要： | 利用地震P波的初动符号测定出地震的震源机制解,进而推断构造活动区的区域应力场,一直是地震学的重要课题。 为了研究喜马拉雅弧形地带的构造应力场,本文采用了G.Vasseur等人提出的求综合断层面解的定量方法。它以每个震源机制解的两个节面解（断层面和辅助面）作为基本资料,试图求出该地区的统一应力场。这个应力场能够较一致地符合各个地震的节面解。
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| 关 键 词： | 地震震源 震源机制解 区域应力场 弧形山系 辅助面 节面 综合断层面解 喜马拉雅弧 构造活动区 统一应力场 |
| 收稿时间： | 1985-05-10 |
INFERRING THE TECTONIC STRESS FIELD OF HIMALAYA ARCUATE STRUCTURE FROM THE MULTIPLE FOCAL MECHANISMS |
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| LI SONG-LIN,YUE HUA-FENG,SONG ZHAN-LONG.INFERRING THE TECTONIC STRESS FIELD OF HIMALAYA ARCUATE STRUCTURE FROM THE MULTIPLE FOCAL MECHANISMS[J].Chinese Journal of Geophysics,1986,29(4):419-423. |
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| Authors: | LI SONG-LIN YUE HUA-FENG SONG ZHAN-LONG |
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| Institution: | Geophysical Prospecting Brigade, State Seismological Bureau, Zhengzhou |
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| Abstract: | In this paper, a preliminary study has been made on the tectonic stress field of Hi-malaya arcuate structure by using the method of inferring stress state from multiplefocal mechanisms which was proposed by G. Vasseur et al. The directions of principalstress axes and the values of ratio R= （σ2-σ3）/（σ1-σ3） in three subareas of this region are ob-tained, in which σ1≥σ2≥σ3. The results show that the R values are all 0.6 and theorientations of three σ1 axes are close to the normal directions of the arcuate structure,which indicates the control of the arcuate structure to the stress field. |
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