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用近场余震观测资料研究张北地震的发震构造
引用本文:赖晓玲,刁桂苓,孙译.用近场余震观测资料研究张北地震的发震构造[J].地球物理学进展,2007,22(1):63-67.
作者姓名:赖晓玲  刁桂苓  孙译
作者单位:1.中国地震局地球物理勘探中心,郑州 450002;2.河北省地震局,石家庄 050021;3. 华北水利水电学院,郑州 450008
基金项目:国家自然科学基金(40374032),地震科学联合基金(104027)资助
摘    要:本文对张北近场地震资料进行了重新定位,并通过网格化处理得到震源空间分布图像、发震时间图像和定位残差图像.震源空间分布图像和发震时间图像细致地显示了极震区周围的发震构造时空特征为明显的北西方向,另外还存在断续的北东向特征.该震区在中新生代以来有过多期岩浆活动,极震区米家沟附近有一个火山口并且地壳内存在低速带和深断裂,复杂的地壳构造为孕震提供了必要的深部环境.

关 键 词:张北地震区  发震构造  震源分布图像  发震时间图像
文章编号:1004-2903(2007)01-0063-05
收稿时间:2005-12-10
修稿时间:2006-03-20

The study on seismogenic structure of Zhangbei earthquake using near field after-shock observation data
LAI Xiao-ling,DIAO Gui-ling,SHUN Zhe.The study on seismogenic structure of Zhangbei earthquake using near field after-shock observation data[J].Progress in Geophysics,2007,22(1):63-67.
Authors:LAI Xiao-ling  DIAO Gui-ling  SHUN Zhe
Institution:1. Geophysical Exploration Center, China Earthquake Administration, Zhengzhou 450002, china ; 2. Seismological Bureau of Hebei Province, Shijazhuang 050021, chinas 3, North China Institute of Water Conservancy and Hydroelectric Power, Zhengzhou 450008, China
Abstract:In this paper,near field earthquake records of Zhangbei earthquake region are relocated.Image of hypocenter distribution,image of origin time and image of locating error are obtained by gridding method.Image of hypocenter distribution and image of origin time show that the temporal-spatial feature of the seismogenic structure in Zhangbei earthquake region is obviously in NW-striking direction and it also has NE-striking discontinuously.There were multiphase magmations during Meso-Cenozoic in Zhangbei earthquake region and mezoseismal area-Mijiagou has a crater.And low-velocity zone and deep fault exist in crust.Complicated crust tectonics provide deep environment in the formation of seismogenic structure.
Keywords:Zhangbei earthquake region  Seismogenic structure  Image of hypocenter distribution  Image of origin time
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