| Study of crustal structure with S—wave data from Maqen—Jingbian profile |
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| 引用本文： | 刘宝峰,李松林,张先康,张成科,任青芳,海燕.Study of crustal structure with S—wave data from Maqen—Jingbian profile[J].地震学报(英文版),2003,16(1):92-98. |
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| 作者姓名： | 刘宝峰 李松林 张先康 张成科 任青芳 海燕 |
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| 作者单位： | ResearchCenterofExplorationGeophysics,ChinaSeismologicalBureau,Zhengzhou450002,China |
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| 基金项目： | State Key Basic Research Development and Programming Project (G1998040702). |
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| 摘 要： | 2-D crustal velocity structure and vp/vs are obtained by processing and interpretation of S-wave data from Maqen-Jingbian deep seismic sounding(DSS)profile.The result shows that there exist obvious differences in 2-D S-wave velocity structure and vp/vs ratio structure along the profile.The S-wave velocities are low and vp/vs ration is high for the westem section of the profile and Haiyuan region,while they are normal for the middle and eastern sections.The changes in lithologic characters of two major anomalous zones are discussed according to lateral variation of S-wave velocity structure and vp/vs ratio structure.It is concluded that the development and occurrence of the Haiyuan strong earthquake is not only related to tectonic activities,but also to lithologic characters of the region.
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| 关 键 词： | S波 速度结构 波速比 构造运动 活动断裂 玛沁－靖边剖面 |
| 收稿时间： | 25 March 2002 |
| 修稿时间： | 29 August 2002 |
Study of crustal structure with S-wave data from Maqen-Jingbian profile |
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| Liu Bao-feng , Li Song-lin , Zhang Xian-kang , Zhang Cheng-ke , Ren Qing-fang and Hai Yan.Study of crustal structure with S-wave data from Maqen-Jingbian profile[J].Acta Seismologica Sinica(English Edition),2003,16(1):92-98. |
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| Authors: | Liu Bao-feng Li Song-lin Zhang Xian-kang Zhang Cheng-ke Ren Qing-fang and Hai Yan |
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| Institution: | Research Center of Exploration Geophysics, China Seismological Bureau, Zhengzhou 450002, China |
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| Abstract: | D crustal velocity structure and vP/vS are obtained by processing and interpretation of S-wave data from Maqen-Jingbian deep seismic sounding (DSS) profile. The result shows that there exist obvious differences in 2-D S-wave velocity structure and vP/vS ratio structure along the profile. The S-wave velocities are low and vP/vS ratio is high for the western section of the profile and Haiyuan region, while they are normal for the middle and eastern sections. The changes in lithologic characters of two major anomalous zones are discussed according to lateral variation of S-wave velocity structure and vP/vS ratio structure. It is concluded that the development and occurrence of the Haiyuan strong earthquake is not only related to tectonic activities, but also to lithologic characters of the region. |
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| Keywords: | deep seismic sounding velocity structure vP/vS Haiyuan earthquake |
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