【作者】 王亮；

【导师】 黄金水； 周龙泉；

【作者基本信息】 中国科学技术大学 ， 固体地球物理， 2012， 硕士

【摘要】 本文利用紫坪铺水库7个库区地震台站和10个区域地震台站记录的2004年8月～2008年5月期间的地震震相观测报告,通过震源位置和速度结构联合反演的方法,采用simulps14软件对紫坪铺水库地区进行了小震位置和速度结构的联合反演在对数据进行预处理的基础上,通过计算得到了紫坪铺水库地区几乎所有记录到得地震的小震精定位结果和0km,3km,6km,10km几个层面上较好的P波速度、S波速度和波速比分布情况。并将其与水库蓄水进行了相关性研究,精定位结果显示紫坪铺水库地区的地震活动主要集中在虹口、玉堂镇和水磨三个地区,各地震集中区域对水库蓄水的响应各有不同。层析成像和波速比结果则较好的反映了紫坪铺地区受到水库渗水的影响范围,及紫坪铺水库对汶川地震的影响。整体上来讲,紫坪铺水库在水库的西南端水库渗水作用最大深度不超过8km,汶川主震深度上没有明显P波和S波速度的低速异常,而且也没有明显的波速比的高值异常,说明水的渗透作用并没有达到汶川主震位置深度,即水对汶川地震的发生没有直接作用。更多还原

【Abstract】 In this study, we used the earthquake observation reports recorded by 7 Zipingpu Reservoir Area earthquake stations and 10 regional seismic stationsduring the period from August 2004 to May 2008. Through simultaneous inversion method of earthquake hypocenters and velocity structure, we got the velocity structure and the earthquake location of the zipingpu area by simulps14.We got the results of the P wave velocity structure, S wave velocity structure and Vp/Vs. At the same time, all theearthquake locations s have been recorded, and they were found Concentrated in three areas. The responses of the reservoir storage were different in different areas. The results of velocity structure elaborated the affects of Reservoir seepage to Wenchuan M8.0 earthquake. the influence scope in depth of Reservoir seepage in the southwest of zipingpu Reservoir was no more than 8kmwhich showed that the water was not the direct factor caused Wenchuan Earthquake.更多还原