| 滇西地震预报实验场场区水平形变分析 |
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| 引用本文： | 阳世华,李春光,王映.滇西地震预报实验场场区水平形变分析[J].大地测量与地球动力学,1995(2). |
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| 作者姓名： | 阳世华 李春光 王映 |
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| 作者单位： | 云南省地震工程研究所测量队 |
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| 摘 要： | 利用场区各种类型水平形变网数据，求得红河断裂中、北段的区域应力场基本特征是：（１）北区为张性左旋型，（２）中区为压性右旋型，（３）南区为张性右旋型。场区区域应力场基本以张性为主，中区的压性右旋型恰好反映转换区应力场的局部特征。北区主应变积累和速率比南区大，最大处在剑川，而高敏感区在后山定两岭。基于水平形变和应变分析，获得了场区现今主要活动构造参数。利用地震前兆形变信息和震后效应进行了地震震例分析。并对３～５年内的潜在震源区进行了预估。
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| 关 键 词： | 滇西地震实验场 水平形变 应变分析 活动构造带 潜在震源区 |
ANALYSIS OF HORIZONTAL DEFORMATION IN WESTERN YUNNAN SEISMOLOGICAL EXPERIMEWNT AREA |
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| Yang Shihua, Li Chunguang and Wans Ying.ANALYSIS OF HORIZONTAL DEFORMATION IN WESTERN YUNNAN SEISMOLOGICAL EXPERIMEWNT AREA[J].Journal of Geodesy and Geodynamics,1995(2). |
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| Authors: | Yang Shihua Li Chunguang and Wans Ying |
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| Abstract: | Using various horizontal deformation network data of the Study Are, the basic characteristics of regional stress field in middle and north section of the Honghe Fault are obtained. (1) Northern area is of tensional left-lateral motion type. (2)Middle area is of compressive left-lateral motion type. (3)Southern area is of tensional right-lateral motion type. The regional stress field of this area is dominantly tensional and the compressive left-lateral motin type in mid-area just reflects the partial characteristics of stress field in the transform area. In the North primary strain accumulation and its rate is larger than in the S-area. The maximum strain accumulation is in Jianchuan and the high-sensitive area in Houshan Dingxiling.Based on horizontal deformation data the calculation and analysis of deformation and strain in the srudy Area result in the parameters of recent principal active tectonics. By use of precursory deformation information and post-seismic effect some earthquakes are analysed and the potential source zones in 3-5 years are pre-estimated. |
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| Keywords: | Western-Yunnan seismological experiment site horizontal deformation strain analysis active tectonic zone potential earthquake zone |
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