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| The movement age of hidden fault and analysis on width of its effect zone from shallow seismic sounding and drilling data | |
| 作者姓名： | 杨晓平 李德庆 赵成斌 刘保金 孙振国 赵景尧 |
| 作者单位： | Institute of Geology，China Earthquake Administration，Beijing 100029，China，Geophysical Exploration Center，China Earthquake Administration，Zhengzhou 450003，China，Geophysical Exploration Center，China Earthquake Administration，Zhengzhou 450003，China，Geophysical Exploration Center，China Earthquake Administration，Zhengzhou 450003，China，Geophysical Exploration Center，China Earthquake Administration，Zhengzhou 450003，China，Earthquake Administration of Zhengzhou City，Zhengzhou 450000，China |
| 基金项目： | 国家高技术研究发展计划(863计划) |
| 摘 要： | Introduction Artificial seismic sounding is a geophysical exploration technique developed in prospectingfor oil and gas and other mineral resources and consists of reflection wave and refraction waveexploration methods. With rapid development of computer techniques and sounding instruments,the reflection wave method became a high-resolution imagery technique for underground struc-tures and is widespreadly used in detection of underground caves and in engineering exploration.In previous se… |
The movement age of hidden fault and analysis on width of its effect zone from shallow seismic sounding and drilling data |
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| YANG Xiao-ping LI De-qingZHAO Cheng-bin LIU Bao-jin SUN Zhen-guo ZHAO Jing-yao Institute of Geology,China Earthquake Administration,Beijing ,China Geophysical Exploration Center,China Earthquake Administration,Zhengzhou ,China Earthquake Administration of Zhengzhou City,Zhengzhou ,China.The movement age of hidden fault and analysis on width of its effect zone from shallow seismic sounding and drilling data[J].Acta Seismologica Sinica(English Edition),2004,17(Z1). | |
| Authors: | YANG Xiao-ping LI De-qingZHAO Cheng-bin LIU Bao-jin SUN Zhen-guo ZHAO Jing-yao Institute of Geology China Earthquake Administration Beijing China Geophysical Exploration Center China Earthquake Administration Zhengzhou China Earthquake Administration of Zhengzhou City Zhengzhou China |
| Institution: | 1. Institute of Geology, China Earthquake Administration, Beijing 100029, China 2. Geophysical Exploration Center, China Earthquake Administration, Zhengzhou 450003, China 3. Earthquake Administration of Zhengzhou City, Zhengzhou 450000, China |
| Abstract: | Field experimental seismic sounding permitted us to obtain optimal shallow seismic reflection sounding parame-ters. In process of data processing, we obtained a high-qualitative shallow seismic reflection sounding profile byusing the techniques such as filtering, edition surgical blanking, prediction deconvolution, fitting static correlationof first arrival time, and velocity analysis. Comprehensive analysis on the information of reflection wave groupsalong the seismic sounding profile and the stratigraphic and neogeochronological data obtained from many drillsnear the sounding line reveals that the upper termination of the detected fault zone is located at depth of 75～80 m,in the Middle Pleistocene deposits dated to be about 220 ka BP. The continuity, discontinuity, increasing and de-creasing amount of reflection wave groups and change of their configurations, in combination with geologicalcolumns of drills, permitted us to know that the width of upper termination of the fault zone is 100 m. It can beinferred from the variation of number of reflection wave groups along the profile that the scarp of hidden fault is200 m wide and the fault is a synsedimentary active fault in the Early Pleistocene and the early stage of MiddlePleistocene. No tectonic movement, which offset the covering deposits, had occurred since the late stage of Middle Pleistocene. |
| Keywords: | shallow seismic reflection sounding drill geological data stratum dating hidden fault fault movement |
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