| 邢台震源区波速比异常与地震的关系 |
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| 引用本文： | 嘉世旭,刘昌铨.邢台震源区波速比异常与地震的关系[J].地球物理学报,1996,39(Z1):205-215. |
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| 作者姓名： | 嘉世旭 刘昌铨 |
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| 作者单位： | 国家地震局地球物理勘探中心, 郑州 450003 |
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| 摘 要： | 通过对忻州─泰安人工地震测深剖面Ｐ波、Ｓ波的联合解释，得到沿剖面不同地质单元隆起区与裂陷区、震源区与非震区的速度和波速比结构．鲁西隆起和太行、山西隆起为较均匀的成层构造，地壳厚度分别为３２ｋｍ和４０－４３ｋｍ，波速比为１．７４．中段裂陷区构造变化较大，地壳厚度约３０－３３ｋｍ，波速比为１．７５－１．７７．邢台地震区上地壳下部和中地壳出现高波速比１．７７的异常，与裂陷区东的１．７３形成明显的差异．由此推测，地震的发生不仅与震源区的构造有关，更主要是与震源区岩石的性质有关。
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| 关 键 词： | 地震测深 波速比 震源岩性 邢台震源区 |
| 收稿时间： | 1995-04-08 |
V_p/V_s ANOMALY AND EARTHQUAKE IN XINGTAI EPICENTRAL REGION |
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| JIA SHI-XU,LIU CHANG-QUAN.V_p/V_s ANOMALY AND EARTHQUAKE IN XINGTAI EPICENTRAL REGION[J].Chinese Journal of Geophysics,1996,39(Z1):205-215. |
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| Authors: | JIA SHI-XU LIU CHANG-QUAN |
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| Affiliation: | Geophysical Prospecting Centre of State Seismological Bureau, ZhengZhou 450003, China |
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| Abstract: | By studing, interpreting the Information of P-wave and S-wave of Taian-Longyaon-Xingzhou DSS Profile. We get the velocity and Vp/Vs ratio structure in different geologic units,upheaval and depression,earthquake and nonearthquake region.western shandeng upheaval and Taihang,Shanxi upheaval are more homogeneous layering structure, the crustal thickness are 32 km and 40-43 km,the Vp/Vs ratio is 1. 74.The structural anisotropy are greater in North China depression region, the crustal thickness are 30-33 km, the Vp/Vs ratio are1.75-1.77. There are Vp/Vs（1.77） anomaly in lower of Upper CruSt and middle crust of Xingtai earthquake region, it appear the obvious difference of the Vp/ Vs ratio（1.73）in the East of North China depression. The result indicate that preparation and occurrence earthquake relate with not only the structure but also the rock characteristic in hypocertral region. |
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| Keywords: | Deep seismic sounding V_p/V_s ratio Rock characteristic in hypocentral region Xingtai earthquake region |
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