| 首都圈地区地壳P波和S波三维速度结构及其与大地震的关系 |
| |
| 引用本文： | 齐诚,赵大鹏,陈颙,陈棋福,王宝善.首都圈地区地壳P波和S波三维速度结构及其与大地震的关系[J].地球物理学报,2006,49(3):805-815. |
| |
| 作者姓名： | 齐诚 赵大鹏 陈颙 陈棋福 王宝善 |
| |
| 作者单位： | 1.中国科学院地质与地球物理研究所，北京 00029 2 Geodynamics Research Center, Ehime University, Matsuyama, Japan 3 中国地震局地震预测研究所，北京 100036 4 中国地震局地球物理研究所，北京 100081 |
| |
| 基金项目： | 致谢 感谢北京（数字化）地震遥测台网提供的地震观测报告. |
| |
| 摘 要： | 选用华北地震遥测台网和首都圈数字化地震遥测台网1993～2005年记录的2866个地震事件中的33487条P波和31822条S波的到时资料，计算得到了水平分辨率25km到50km之间的首都圈地区（385°N～41°N， 114°E～120°E）地壳三维P波和S波速度结构，并进一步获得泊松比分布.研究表明，首都圈地区P波和S波速度分布表现出强烈的横向不均匀性，浅层速度分布同地表地质结构分布相一致.分析得出震区强震多发生在低速体与高速体之间、低泊松比地区，且震源下部存在低速、高泊松比异常体.经过与其他地区研究结果相比较，对地震触发与流体的关系进行了探讨.流体在地震孕育及触发的过程中可能起着重要作用.
|
| 关 键 词： | 首都圈 地震层析成像 地壳三维结构 泊松比 |
| 文章编号： | 0001-5733（2006）03-0805-11 |
| 收稿时间： | 2005-08-31 |
| 修稿时间： | 2005-08-312006-03-01 |
3-D P and S wave velocity structures and their relationship to strong earthquakes in the Chinese capital region |
| |
| QI Cheng,ZHAO Da-Peng,CHEN Yong,CHEN Qi-Fu,WANG Bao-Shan.3-D P and S wave velocity structures and their relationship to strong earthquakes in the Chinese capital region[J].Chinese Journal of Geophysics,2006,49(3):805-815. |
| |
| Authors: | QI Cheng ZHAO Da-Peng CHEN Yong CHEN Qi-Fu WANG Bao-Shan |
| |
| Institution: | 1.Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China 2 Geodynamics Research Center, Ehime University, Matsuyama, Japan 3 Institute of Earthquake Science, China Earthquake Administration, Beijing 100036, China 4 Institute of Geophysics, China Earthquake Administration, Beijing 100081, China |
| |
| Abstract: | We used 33487 P and 31822 S wave arrival times from 2866 events recorded by the North China seismic telemetry network and the Capital Circle digital seismic telemetry network from 1993 to 2005 The crustal three dimensional P and S wave velocity structures in the Capital Circle area (385°N～41°N， 114°E～120°E) are obtained with a horizontal resolution of 25 to 50 km. The Poisson's ratio distribution is also achieved. Our results show that there is significant inhomogeneity in the P and S velocity structures in the Capital Circle area. Shallow velocity anomalies distributions are consistent with main surface geological tectonic features. We found that strong earthquakes in the seismic zone are apt to occur between low velocity and high velocity zones as well as in low Poisson's ratio zones. Under these hypocenters, low velocity and high Poisson's ratio anomalies exist. By comparison with the results of other regions, the relation between earthquake triggering and fluids is discussed. We think that the effect of fluids plays an important role in the earthquake generation and triggering processes. |
| |
| Keywords: | The Capital Circle area Tomography Crustal 3-D structure Poisson's ratio |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《地球物理学报》浏览原始摘要信息 |
| 点击此处可从《地球物理学报》下载免费的PDF全文 |
