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| 引用本文： | 王墩,姚运生,薛军蓉,陈俊华,宋琛.????????????????????????????о?[J].大地测量与地球动力学,2007,27(5):103-107. |
| 作者姓名： | 王墩 姚运生 薛军蓉 陈俊华 宋琛 |
| 作者单位： | 1. 中国地震局地震研究所,武汉,430071;地壳运动与地球观测实验室,武汉,430071;武汉地震工程研究院,武汉,430071 2. 中国地震局地震研究所,武汉,430071;地壳运动与地球观测实验室,武汉,430071 3. 中国地震局地震研究所,武汉,430071 4. 中国地震局地震研究所,武汉,430071;武汉地震工程研究院,武汉,430071 |
| 基金项目： | 中国科技部社会公益研究专项(2004DIB3J131)，长江三峡工程开发总公司项目(CT-06-07-03)，国家自然科学基金(40674019)，中国地震局地震研究所所长基金(IS200756043) |
| 摘 要： | ????2000~2006???????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????,P???????С,????,??????????????￡??????????????????????????????????????????????P????????????????????????????,????????????????????????????????????й?? |
| 关 键 词： | ?????????????? ??? ???????? ??????????? ???? |
| 文章编号： | 1671-5942（2007）05-0103-05 |
| 修稿时间： | 2007-05-27 |
FOCAL MECHANISM OF KEY MONITORING AREA OF THREE GORGES RESERVOIR BEFORE AND AFTER IMPOUNDMENT |
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| Wang Dun,Yao Yunsheng,Xue Junrong,Chen Junhua,Song Chen.FOCAL MECHANISM OF KEY MONITORING AREA OF THREE GORGES RESERVOIR BEFORE AND AFTER IMPOUNDMENT[J].Journal of Geodesy and Geodynamics,2007,27(5):103-107. | |
| Authors: | Wang Dun Yao Yunsheng Xue Junrong Chen Junhua Song Chen |
| Abstract: | By use of the data from digital telemetered seismic network of induced earthquake monitoring system in the Three Gorges area from 2000 to 2006,the focal mechanisms in key monitoring area of the Three Gorges reservoir are calculated.The results show that the focal mechanism parameters of earthquakes before impoundment are strike-slip-reverse fault, the maximum horizontal principal compressive stress is near EW while P axis elevation is small,i.e. P axis is near horizontal,it is consistent with the regional principal compressive stress; the focal mechanism parameters of earthquakes after impoundment are strike-slip-normal,P axis elevation is near vertical,the directions of maximum horizontal principal compressive stress axis are mussy and are not controlled by regional principal compressive stress.This state implies that the complex focal mechanisms may be correlated with the complex seismogenic mechanisms of the induced earthquake. |
| Keywords: | key monitoring area of the Three Gorges reservoir impoundment focal mechanism horizontal maximum principal compressive stress pore pressure |
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