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| 东北地区Pn波速度结构研究 | |
| 引用本文： | 贾军,周仕勇,孟宪森,战玉明.东北地区Pn波速度结构研究[J].东北地震研究,2011,27(2):53-59. |
| 作者姓名： | 贾军 周仕勇 孟宪森 战玉明 |
| 作者单位： | 1. 北京大学地球与空间科学学院，北京100871 黑龙江省地震局，黑龙江哈尔滨150090 2. 北京大学地球与空间科学学院,北京,100871 3. 黑龙江省地震局,黑龙江哈尔滨,150090 |
| 摘 要： | 本文利用2000年1月至2011年2月黑龙江省地震台网的数字地震波形记录中2158条Pn波到时数据,并结合1985～2008年的中国地震年报数据中提取的10641条Pn波到时数据,反演了中国东北地区（东经110°—136°、北纬35°—55°）的Pn波速度结构,结果表明东北地区上地幔顶部速度结构的横向变化与现代构造运动有明显的关联：上地幔顶部Pn波速度低值区与中国东北地区火山活动区域有很好的一致性;松辽盆地地区Pn波速度显然高于其周边区域。东北地区强震大都发生在Pn波的速度低速带或速度过渡带,反映出上地幔顶部的流变性对构造应力的传递起着重要作用。 |
| 关 键 词： | Pn波成像 东北地区 |
STUDY ON PN-WAVE VELOCITY STRUCTURE IN THE NORTHEAST CHINA |
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| JIA Jun,ZHOU Shi-yong,MENG Xian-sen,ZHAN Yu-ming.STUDY ON PN-WAVE VELOCITY STRUCTURE IN THE NORTHEAST CHINA[J].Seismological Research of Northeast China,2011,27(2):53-59. | |
| Authors: | JIA Jun ZHOU Shi-yong MENG Xian-sen ZHAN Yu-ming |
| Institution: | JIA Jun1,2,ZHOU Shi-yong1,MENG Xian-sen2,ZHAN Yu-ming2 (1.Department of Geophysics,Peking University,Beijing 100871,China,2.Earthquake Administration of Heilongjiang Province,Heilongjiang Harbin 150090,China) |
| Abstract: | 2158 Pn phase arriving times have been picked from the earthquake waveform recodings of Heilongjiang Digital Seismic Network for 2000—2010,and 10641 Pn phase arriving times have been collected from Annual Bulletin of Chinese Earthquakes for 1985—2008.Pn velocity structure in Northeast China has been inverted.The main results show that the relation between Pn velocity structure and regional tectonic structure is close.The Pn velocities in the areas with the volcano activities are obviously low.The Pn velocity of the songliao basin is higher than of its neighboring areas.Most of strong earthquakes occurre in low Pn velocity areas,which implies that the visco-plasticity of the top-mantle material might play an important role on transferring the tectonic stress to the upper crust. |
| Keywords: | Pn tomography Northeast China |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ | |