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Shallow seismic exploration of the Anqiu-Juxian fault in Juxian Basin and its significance |
WANG Wei1,2,3( ), LIN Song1,2,3,4( ), CHENG Miao1,2,3, JIN Chong4, ZHOU Hong-Wei4 |
1. Institute of Seismology,CEA,Wuhan 430071,China 2. Hubei Key Laboratory of Earthquake Early Warning,Wuhan 430071,China 3. Hubei Earthquake Administration,Wuhan 430071,China 4. Wuhan Institute of Earthquake Engineering Co. Ltd.,Wuhan 430071,China |
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Abstract Anqiu-Juxian fault in the Tanlu fault zone is in a concealed state in the Juxian basin.Geophysical data in the basin is very insufficient,and the distribution and spatial geometric characteristics of the fault are not clear.In view of such a situation,the buried faults in the basin were detected by shallow seismic reflection detection,and the distribution characteristics of Anqiu-Juxian fault in the basin were preliminarily discussed and analyzed in combination with the study of Zheng Chuanbei and other research results.The results show that the Anqiu-Juxian fault is located in the Quaternary sediments of Juxian basin,with relatively shallow burial depth.The fault is characterized by compressional thrust and positive fault in some sections.The shallow seismic reflection profile shows the new geophysical evidence of Anqiu-Juxian fault in Juxian basin and provides geophysical reference for the overall evaluation of the fault.
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Received: 21 April 2020
Published: 27 July 2021
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Corresponding Authors:
LIN Song
E-mail: smilevivi0821@163.com;ls6102212@163.com
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Regional geological structure diagram of the study area fault number:①—Fushan fault;②—Cangni fault;③—Tongshi-Ganlin fault;④—Wensi fault;⑤—Mengshan piedmont fault;⑥—Xiazhuang-Anjiazhuang fault;⑦—Yangliudian fault;⑧—Xintai-Mengyin fault;⑨—Tongzhidian-Sunzudian fault;⑩—Mamuchi-Tongzhidian fault;?—Tangwu-Gegou fault;?—Yishui-Tangtou fault;?—Baifenzi-Fulaishan fault;?—Anqiu-Juxian fault;?—Changyi-Dadian fault;?—Xiangdi-Gaogezhuang fault basin number:⑴—Lizhuang basin;⑵—Linyi basin;⑶—Banquan basin;⑷—Sucun basin;⑸—Juxian basin; ⑹—Baiyan basin
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18]) F1—Baifenzi-Fulaishan fault;F2—Anqiu-Juxian fault;F3—Changyi-Dadian fault ">
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Geological section of Juxian fault depression(according to reference [18]) F1—Baifenzi-Fulaishan fault;F2—Anqiu-Juxian fault;F3—Changyi-Dadian fault
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Schematic diagram of working method of shallow seismic reflection wave field method
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测线名称 | 测线起点位置坐标 | 测线终点位置坐标 | 测线长度/m | 纬度/(°) | 经度/(°) | 纬度/(°) | 经度/(°) | 测线Ⅰ | 35.554156 | 118.801346 | 35.551083 | 118.823662 | 2050 | 测线Ⅱ | 35.534461 | 118.778858 | 35.528873 | 118.797398 | 1800 | 测线Ⅲ | 35.523844 | 118.773193 | 35.519233 | 118.789158 | 1470 |
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Research on the data of measuring line in the area
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The reflection data processing
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Interpretation of shallow seismic depth profile of line Ⅰ
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Interpretation of shallow seismic depth profile of line Ⅱ
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Interpretation of shallow seismic depth profile of line Ⅲ
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