| 玛沁-靖边剖面S波资料研究与探讨 |
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| 引用本文： | 刘宝峰,李松林,张先康,张成科,赵金仁,任青芳,海燕.玛沁-靖边剖面S波资料研究与探讨[J].地震学报,2003,25(1):82-88. |
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| 作者姓名： | 刘宝峰 李松林 张先康 张成科 赵金仁 任青芳 海燕 |
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| 作者单位： | (中国郑州450002中国地震局地球物理勘探中心) |
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| 基金项目： | 国家重点基础研究发展计划(973计划)，中国地震局地球物理勘探中心项目，G1998040702，RCEG200210，， |
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| 摘 要： | 对玛沁——靖边剖面深地震测深S波资料处理解释，获得本区S波二维地壳速度结构和波速比结构．结果表明，该区S波二维速度结构和波速比结构，沿剖面存在着明显的差异．剖面西段和海原地区下方呈现S波速度偏低，而波速比偏高的结构特征；剖面中段和东段的S波速度和波速比正常．根据S波速度结构和波速比结构的横向变化特征，讨论了两大异常区岩性的变化．推测海原大地震孕育发生不仅与构造活动有关，而且与该区的岩石性质有关．
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| 关 键 词： | 地震测深& 速度结构& 波速比& 海原地震 |
| 文章编号： | 0253-3782(2003)01-0082-07 |
| 修稿时间： | 2002年3月25日 |
STUDY OF CRUSTAL STRUCTURE WITH S-WAVE DATA FROM MAQIN-JINGBIAN PROFILE |
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| Liu Baofeng Li Songlin Zhang Xiankang Zhang Chengke Zhao Jinren Ren Qingfang,Hai Yan.STUDY OF CRUSTAL STRUCTURE WITH S-WAVE DATA FROM MAQIN-JINGBIAN PROFILE[J].Acta Seismologica Sinica,2003,25(1):82-88. |
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| Authors: | Liu Baofeng Li Songlin Zhang Xiankang Zhang Chengke Zhao Jinren Ren Qingfang Hai Yan |
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| Abstract: | D crustal velocity structure and vP/vS are obtained by processing and interpretation of S-wave data from Maqin-Jingbian deep seismic sounding (DSS) profile. The result shows that there exist obvious differences in 2-D S-wave velocity structure and vP/vS structure along the profile. The western section of the profile and Haiyuan region have low S-wave velocities and high vP/vS ratio,while the middle and eastern sections have normal S-wave velocities and vP/vS ratio. Variation in lithologic characters of two major anomalous zones is 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 movement,but also to lithologic characters of the region. |
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| Keywords: | deep seismic sounding velocity structure vP/vS ratio Haiyuan earthquake |
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