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海原8.5级大震区地壳结构探测研究
引用本文:李松林,张先康,张成科,任青芳,石金虎,赵金仁,方盛明,刘宝峰,潘素珍,张建狮.海原8.5级大震区地壳结构探测研究[J].中国地震,2001,17(1):16-23.
作者姓名:李松林  张先康  张成科  任青芳  石金虎  赵金仁  方盛明  刘宝峰  潘素珍  张建狮
作者单位:中国地震局地球物理勘探中心,
基金项目:本研究属国家重点基础研究发展规划项目(973项目,子课题编号95-13-02-02),中国地震局地球物理勘探中心科技论著号200012.
摘    要:对西吉-中卫剖面深地震测深资料进行处理和解释,得到了海原8.5级大震区的壳幔速度结构和深部构造,结果表明,震区南北两侧壳内存在着明显的速度结构差异,南侧呈高,低速相间的结构特征,北侧为正的速度梯度层,在震区的下方存在着M面断裂或构造异常带。

关 键 词:海原地震  地壳结构  地壳深断裂  构造异常带  深部构造

Study on Crust Structure of Haiyuan Strong Earthquake Region
Li Songlin,Zhang Xiankang,Zhang Chengke,Re Qingfang,Shi Jinhu\ Zhao Jinren\ Fang Shengming\ Liu Baofeng\ Pan Suzhen\ Zhang Jianshi.Study on Crust Structure of Haiyuan Strong Earthquake Region[J].Earthquake Research in China,2001,17(1):16-23.
Authors:Li Songlin  Zhang Xiankang  Zhang Chengke  Re Qingfang  Shi Jinhu\ Zhao Jinren\ Fang Shengming\ Liu Baofeng\ Pan Suzhen\ Zhang Jianshi
Abstract:The crust\|upper mantle velocity structure and deep tectonic feature are obained in Haiyuan M 8.5 earrthquake region from the data processing of Xiji\|Zhongwei Deep Seismic Sounding(DSS) profile. The result shows that there is a great difference between the velocity structures of the two sides of the epicenter.The crust consists of alternative high and low velocity layers in the south side while in the north side it consists of a series of layers with positive velocity gradient.There exists a deep fault cutting the Moho or a anomalous deep structure in the epicenter region.
Keywords:Haiyuan earthquake\ Crust structure\ Crust deep fault
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