高密度电阻率二维层析成像在郯庐断裂带山东潍坊段试验结果的初步分析
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摘要
在城市活断层调查中,利用电阻率二维层析成像测量方法,对郯庐断裂带山东潍坊段的地震活断层进行了探测试验,取得了较理想的勘探效果。沂水-汤头断裂、刘家庄断裂的二维电阻率反演结果表明,断裂带两侧的电性结构呈现出整体性的差异,正断层的上盘为低阻区和局部高、低阻扰动区;而断层下盘多为均匀的高阻区;断层为高角度断层。试验探测表明:在城市活断层调查中,选用合适的电极装置类型,电阻率层析成像是一种有效的勘探方法。
The electrical resistivity tomography survey was conducted to detect the active faults along the Tanlu fault zone in Weifang,Shandong province.The results of 2-D resistivity inversion of the Yishui-Tangtou and the Liujazhuang faults indicate that electrical structures on both sides of the fault zone present obvious difference,the resistivity of the hanging wall is low and partially high,while that of the foot wall is high,and the faults are high-obliquity faults.Results show that the resistivity tomography survey is very effective for detection of active faults in urban area.
The electrical resistivity tomography survey was conducted to detect the active faults along the Tanlu fault zone in Weifang,Shandong province.The results of 2-D resistivity inversion of the Yishui-Tangtou and the Liujazhuang faults indicate that electrical structures on both sides of the fault zone present obvious difference,the resistivity of the hanging wall is low and partially high,while that of the foot wall is high,and the faults are high-obliquity faults.Results show that the resistivity tomography survey is very effective for detection of active faults in urban area.
引文
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谢忠球,温佩琳,喻振华.2001.提高高密度电阻率成像分辨力的数据处理技术[A].见:湖南省地球物理论丛.长沙:中南大学出版社.XIE Zhong-qiu,WEN Pei-lin,YU Zhen-hua.2001.The data processing techniques that improve resolution of highdensity electrical resistivity tomography[A].In:Collected Geophysics Papers of Hunan Province.Central SouthUniversity Publishing House,Changsha(in Chinese).
薛顺章,温新睢,董永德.1994.地电阻率预报地震新方法的研究[J].地震学报,16(2):227—234.XUE Shun-zhang,WEN Xin-sui,DONG Yong-de.1994.A new method for earthquake prediction by earth-resistivitymeasurements[J].Acta Seismologica Sinica,16(2):227—234(in Chinese).
傅良魁.1990.电法勘探教程[M].北京:地质出版社.FU Liang-kui.1990.Electrical Prospecting Course[M].Geological Publishing House,Beijing(in Chinese).
侯康刖,杜学彬.1993.偶极电测深与预报地震的试验研究[J].华北地震科学,11(1):74—83.HOU Kang-yue,DU Xue-bin.1993.The test research on application of electric dipole depth-sounding in earthquakeprediction[J].North China Earthquake Sciences,11(1):74—83(in Chinese).
李清林,张建志,秦建增.2003.高密度电阻率在城市活断层调查中的应用[J].CT理论与应用研究,12(1):1—5.LI Qing-lin,ZHANG Jian-zhi,QIN Jian-zeng.2003.Application of resistivity tomography survey method in detectingactive faults in urban area[J].Computerized tomography theory and application,12(1):1—5(in Chinese).
钱家栋,赵和云.1988.地电阻率的数值模拟和多极距观测系统[J].地震学报,10(1):77—89.QIAN Jia-dong,ZHAO He-yun.1988.Earth resistivity modeling and observational system with multi-separation ofelectrodes[J].Acta Seismologica Sinica,10(1):77—89(in Chinese).
孙景慧,高树义,任建国.2004.高密度电阻率法在活动断裂探测中的应用[J].山西地震,(4):1—3.SUN Jing-hui,GAO Shu-yi,REN Jian-guo.2004.The application of high density resistivity method to active faultdetection[J].Earthquake Research in Shanxi,(4):1—3(in Chinese).
王亚会,王永江,孟琪.2006.电阻率层析成像在沈阳市地震活断层探测中的应用[J].东北地震研究,22(1):33—39.WANG Ya-hui,WANG Yong-jiang,MENG Qi.2006.Application of electrical resistivity CT in seismic active faultdetection of Shenyang City[J].Seismological Research of Northeast China,22(1):33—39(in Chinese).
谢忠球,温佩琳,喻振华.2001.提高高密度电阻率成像分辨力的数据处理技术[A].见:湖南省地球物理论丛.长沙:中南大学出版社.XIE Zhong-qiu,WEN Pei-lin,YU Zhen-hua.2001.The data processing techniques that improve resolution of highdensity electrical resistivity tomography[A].In:Collected Geophysics Papers of Hunan Province.Central SouthUniversity Publishing House,Changsha(in Chinese).
薛顺章,温新睢,董永德.1994.地电阻率预报地震新方法的研究[J].地震学报,16(2):227—234.XUE Shun-zhang,WEN Xin-sui,DONG Yong-de.1994.A new method for earthquake prediction by earth-resistivitymeasurements[J].Acta Seismologica Sinica,16(2):227—234(in Chinese).
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