| 三分量地震散射波成像在天津蓟县城市活断层探测中的应用 |
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| 引用本文： | 张保卫,;沈鸿雁.三分量地震散射波成像在天津蓟县城市活断层探测中的应用[J].物探与化探,2014(3):504-509. |
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| 作者姓名： | 张保卫 ;沈鸿雁 |
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| 作者单位： | [1]中国地质科学院地球物理地球化学勘查研究所,河北廊坊065000; [2]西安石油大学地球科学与工程学院,陕西西安710065 |
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| 基金项目： | 国土资源部公益性行业科研专项（201111018）;中国地质科学院物化探研究所基本科研业务费专项（AS2009J01）;陕西省教育厅重点实验室科研计划项目（13JS093） |
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| 摘 要： | 在精细解决近地表地质问题方面,三分量地震探测技术具有明显的优势。笔者基于点散射地震—地质模型,推导出多分量散射波时距方程,在建立多分量散射波成像原理的基础上,对天津蓟县城市活断层探测的三分量地震资料进行处理。成像结果表明,基岩面的波组特征明显、构造内幕特征较丰富,而且基岩面附近的小断层发育。通过研究,基本明确了该地区基岩与第四系土层的接触关系,探明了山前断裂情况和基岩面附近的地质结构特征。
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| 关 键 词： | 活断层 三分量地震 PP波 PS转换波 散射波成像 |
The application of three-component scattering wave seismic imaging in detecting city active fault in Ji district,Tianjin city |
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| Institution: | Zhang Baowei, Shen Hongyan ( 1. Institute of Geophysical ＆ Geochemical Exploration, Chinese Academy of Geological Sciences, Langfang 065000, China; 2. School of earth sciences and engineering, Xi＇an Shiyou University, Xi＇an 710065, China) |
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| Abstract: | Three-component （ 3C） seismic technology to fine solve the near-surface geological problems has obvious advantages. Based on the point scattering seismic-geological model, we deduced multi-component scattering wave time-distance equation. On the basis of establishing the multi-component scattering wave imaging principle, we processed the 3C seismic data for the detecting city active fault in Jixian of Tianjin. Imaging results show that the wave group characteristics of the bedrock surface are obvious, insider structural fea-tures are rich, and minor faults near the bedrock surface are more development. Through this study, the contact relationship between the bedrock and Quaternary soil in the region is basic cleared, and the piedmont fault conditions and the geological structure of bedrock near the surface have been clear surveyed. |
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| Keywords: | Active fault 3C seismic PP wave PS converted wave Scattering wave imaging |
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