| 藏东应力场分析 |
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| 引用本文： | 谢平,金花,曹忠权,陈正位.藏东应力场分析[J].高原地震,2007,19(3):35-40. |
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| 作者姓名： | 谢平 金花 曹忠权 陈正位 |
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| 作者单位： | 西藏自治区地震局,西藏,拉萨,850000;西藏自治区地震局,西藏,拉萨,850000;中国地震局地震预测研究所,北京,100036 |
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| 摘 要： | 利用GPS观测结果、震源机制解及地应力测试分析藏东地区的应力场特征。根据GPS资料得到了藏东地区的地壳应变状态，而拉萨地块内部，最大主压应变的方位为NE41．21°，羌塘地块内部的最大主压应变方位为NEl9．88°。而在川滇和羌塘地块交界的三江地区，GPS计算得到的最大主压应变方位为SE47．76°；在滇缅地块区内部，最大主压应变方位为NE46．13°根据震源机制解资料得到了藏东地壳应力状态，拉萨地块最大主压应力方位为NE78．33。，羌塘地块最大主压应力方位为NE36．24°三江地区最大主压应力方位为NE81．54°滇缅地块最大主压应力方位为NE47．000。由钻孔地应力测试得到的藏东拉萨地块主应力方位在NE65～75。之间。
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| 关 键 词： | 应力场 应变场 地质构造 藏东地区 |
| 文章编号： | 1005-586X（2007）03-0035-06 |
| 修稿时间： | 2007-06-12 |
ANALYSIS ON STRESS FIELD IN EASTERN XIZANG |
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| XIE Ping,JIN Hua,CAO Zhong-quan,CHEN Zheng-wei.ANALYSIS ON STRESS FIELD IN EASTERN XIZANG[J].Plateau Earthquake Research,2007,19(3):35-40. |
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| Authors: | XIE Ping JIN Hua CAO Zhong-quan CHEN Zheng-wei |
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| Institution: | 1. Earthquake Administration of Xizang Autonomous Region, Lasa 850000, China ; 2. Institute of Earthquake Science, CEA , Beijing 100036, China |
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| Abstract: | The characteristics of stress field in eastem Xizang are analyzed by the GPS results, earthquake focalmechanism solution and stress measurement. According to the GPS data, the direction of the largest principal compress swain is NE41.21° in lasa block, NE19.88° in Qiangtang block, SE47.76° in Sanjiang area（among Sichuan, Yunnan and Qiangtang block）, NE 46.13° in Yurman and Burma block.According to earthquake focal-mechanism solution data,the direction of the largest principal compress strain is N~8.33° in lasa block,NE36.24° in Qiangn Sanjiang area,NE7.00° in Yunnan and Burma block.According to stress measurements, the direction of the largest principal compress strain is NE65°0 - 75° in Lasa block. |
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| Keywords: | Stress field Strain field Geological structure Eastern Xizang area |
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