震源区构造对地震学参数扫描结果的影响分析
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摘要
以华南、华北以及西部地区中强地震为例,选择了8种物理意义明确、独立性较强的地震学指标,以区域内断裂走向为参考,分别沿断裂走向进行平行、垂直、斜向滑移做空间扫描,以扫描曲线与震源区曲线的相关系数大小定量分析不同滑移方式扫描结果的差异,研究不同构造分区内断裂走向对地震学参数扫描结果的影响及变化规律。结果表明:不仅空间参数的改变对结果有影响,震源区内的断裂走向对地震学参数扫描结果也有一定影响。文中给出了不同震级地震学指标在扫描中影响最小的空间范围的最佳条件参数,同时也对不同断裂走向对参数扫描结果可能产生的影响进行了分析。
By taking medium-strong earthquakes of South China,North China and western China as the research objects,this paper selects 8 kinds of seismology indexes with clear physical meaning and strong independence to carry out spatial scans of the parallel slip,vertical slip and oblique slip along the fault strike,respectively. Based on the size of correlation coefficients between scanning curve and source region curve,we analyze quantitatively the difference of scan results of different slip modes and study the impact of fault strike in different tectonic divisions on seismology parameters scanning results and variation rules. The results show that not only the change of spatial parameters has great influence on the seismological parameters scan,but also the fault strike in source region. This paper presents the optimum condition parameters with least influence space scope in scanning for different magnitude seismology indexes and analyzes the possible influence of fault strike on scanning results of seismology parameters.
By taking medium-strong earthquakes of South China,North China and western China as the research objects,this paper selects 8 kinds of seismology indexes with clear physical meaning and strong independence to carry out spatial scans of the parallel slip,vertical slip and oblique slip along the fault strike,respectively. Based on the size of correlation coefficients between scanning curve and source region curve,we analyze quantitatively the difference of scan results of different slip modes and study the impact of fault strike in different tectonic divisions on seismology parameters scanning results and variation rules. The results show that not only the change of spatial parameters has great influence on the seismological parameters scan,but also the fault strike in source region. This paper presents the optimum condition parameters with least influence space scope in scanning for different magnitude seismology indexes and analyzes the possible influence of fault strike on scanning results of seismology parameters.
引文
邓起东.1980.中国新生代断块构造的主要特征[A].见:国际交流地质学术论文集:为26届国际地质大会撰写.构造地质、地质力学.北京:地质出版社.101—108.DENG Qi-dong.1980.Main features of the Cenozoic block structure in China[A].In:Collections for International Ge-ological Exchange-For the26th International Geological Congress,Structural Geology,Geomechanics.GeologicalPublishing House,Beijing.101—108(in Chinese).
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国家地震局预测预防司.1997.地震短临预报的理论与方法[M].北京:地震出版社.Department of Prediction and Prevention,China Seismological Bureau.1997.Methods and theories for imminent andshort-term earthquake predictions[M].Seismological Press,Beijing(in Chinese).
中国地震局预测预防司.1998.大陆地震预报的方法和理论[M].北京:地震出版社.Department of Prediction and Prevention,China Seismological Bureau.1998.Methods and theories for continental earth-quake prediction[M].Seismological Press,Beijing(in Chinese).
丁国瑜,卢演俦.1986.对中国现代板内运动状况的初步探讨[J].科学通报,(18):1412—1415.DING Guo-yu,LU Yan-chou.1986.A preliminary discussion on the status of recent intraplate motions in China[J].Chinese Science Bulletin,(18):1412—1415(in Chinese).
洪汉净,汪一鹏,沈军,等.1998.中国大陆地壳块体运动的平均图像及其动力学意义[A].见:国家地震局地质研究所编.活动断裂研究(6).北京:地震出版社.17—30.HONG Han-jing,WANG Yi-pang,SHEN Jun,et al.1998.Mean velocity field and its dynamic implication for continen-tal crustal block motion in China[A].In:Institute of Geology,SSB(ed).Research on Active Fault(6).Seismo-logical Press,Beijing.17—30(in Chinese).
任金卫,Holt W E,申屠炳明.1999.中亚及东南亚变形运动学及其动力学问题[A].见:国家地震局地质研究所编.活动断裂研究(7).北京:地震出版社.109—146.RENJin-wei,Holt WE,SHENTUBing-min.1999.Deformation kinematics of central-southeast Asia and its dynamics[A].Institute of Geology,CSB(ed).Research on Active Fault(7).Seismological Press,Beijing.109—146(in Chinese).
沈小七,陈宇卫.2006.华东地区测震学指标异常配套和中强震对应关系初探[J].东北地震研究,22(4):25—29.SHEN Xiao-qi,CHEN Yu-wei.2006.Preliminary study on the corresponding relation between the seismological indexesabnormality complement and morderate-strong earthquake in East China area[J].Seismological Research ofNortheast China,22(4):25—29(in Chinese).
中国科学院地质研究所大地构造编图组.1974.中国大地构造基本特征及其发展的初步探讨[J].地质科学,(1):1—17.Tectonic Map Compiling Group,Institute of Geology,Acadamia Sinica.1974.A preliminary note on the basic tectonicfeatures and their development in China[J].Scientia Geologica Sinica,(1):1—17(in Chinese).
张国民,马宏生,王辉,等.2005.中国大陆活动地块边界带与强震活动[J].地球物理学报,48(3):602—610.ZHANG Guo-min,MA Hong-sheng,WANG Hui,et al.2005.Boundaries between active-tectonic blocks and strongearthquakes in the China mainland[J].Chinese J Geophys,48(3):602—610(in Chinese).
张培震,王敏,甘卫军,等.2003.GPS观测的活动断裂滑动速率及其对现今大陆动力作用的制约[J].地学前缘,10(3):81—92.ZHANG Pei-zhen,WANG Min,GAN Wei-jun,et al.2003.Slip rates along major active faults from GPS measurementsand constraints on contemporary continental tectonics[J].Earth Science Frontiers,10(3):81—92(in Chinese).
张文佑.1984.断块构造导论[M].北京:石油工业出版社.ZHANG Wen-you.1984.Introduction to Fault-Block Theory[M].PetroleumIndustry Publishing House,Beijing(in Chinese).
邓起东.1982.中国的活动断裂[A].见:中国地震学会地震地质专业委员会编.中国活动断裂.北京:地震出版社.19—27.DENG Qi-dong.1982.Active faults in China[A].In:Seismo-geological Committee of Chinese Seismological Society(ed).The Active Faults in China.Seismological Press,Beijing.19—27(in Chinese).
国家地震局预测预防司.1997.地震短临预报的理论与方法[M].北京:地震出版社.Department of Prediction and Prevention,China Seismological Bureau.1997.Methods and theories for imminent andshort-term earthquake predictions[M].Seismological Press,Beijing(in Chinese).
中国地震局预测预防司.1998.大陆地震预报的方法和理论[M].北京:地震出版社.Department of Prediction and Prevention,China Seismological Bureau.1998.Methods and theories for continental earth-quake prediction[M].Seismological Press,Beijing(in Chinese).
丁国瑜,卢演俦.1986.对中国现代板内运动状况的初步探讨[J].科学通报,(18):1412—1415.DING Guo-yu,LU Yan-chou.1986.A preliminary discussion on the status of recent intraplate motions in China[J].Chinese Science Bulletin,(18):1412—1415(in Chinese).
洪汉净,汪一鹏,沈军,等.1998.中国大陆地壳块体运动的平均图像及其动力学意义[A].见:国家地震局地质研究所编.活动断裂研究(6).北京:地震出版社.17—30.HONG Han-jing,WANG Yi-pang,SHEN Jun,et al.1998.Mean velocity field and its dynamic implication for continen-tal crustal block motion in China[A].In:Institute of Geology,SSB(ed).Research on Active Fault(6).Seismo-logical Press,Beijing.17—30(in Chinese).
任金卫,Holt W E,申屠炳明.1999.中亚及东南亚变形运动学及其动力学问题[A].见:国家地震局地质研究所编.活动断裂研究(7).北京:地震出版社.109—146.RENJin-wei,Holt WE,SHENTUBing-min.1999.Deformation kinematics of central-southeast Asia and its dynamics[A].Institute of Geology,CSB(ed).Research on Active Fault(7).Seismological Press,Beijing.109—146(in Chinese).
沈小七,陈宇卫.2006.华东地区测震学指标异常配套和中强震对应关系初探[J].东北地震研究,22(4):25—29.SHEN Xiao-qi,CHEN Yu-wei.2006.Preliminary study on the corresponding relation between the seismological indexesabnormality complement and morderate-strong earthquake in East China area[J].Seismological Research ofNortheast China,22(4):25—29(in Chinese).
中国科学院地质研究所大地构造编图组.1974.中国大地构造基本特征及其发展的初步探讨[J].地质科学,(1):1—17.Tectonic Map Compiling Group,Institute of Geology,Acadamia Sinica.1974.A preliminary note on the basic tectonicfeatures and their development in China[J].Scientia Geologica Sinica,(1):1—17(in Chinese).
张国民,马宏生,王辉,等.2005.中国大陆活动地块边界带与强震活动[J].地球物理学报,48(3):602—610.ZHANG Guo-min,MA Hong-sheng,WANG Hui,et al.2005.Boundaries between active-tectonic blocks and strongearthquakes in the China mainland[J].Chinese J Geophys,48(3):602—610(in Chinese).
张培震,王敏,甘卫军,等.2003.GPS观测的活动断裂滑动速率及其对现今大陆动力作用的制约[J].地学前缘,10(3):81—92.ZHANG Pei-zhen,WANG Min,GAN Wei-jun,et al.2003.Slip rates along major active faults from GPS measurementsand constraints on contemporary continental tectonics[J].Earth Science Frontiers,10(3):81—92(in Chinese).
张文佑.1984.断块构造导论[M].北京:石油工业出版社.ZHANG Wen-you.1984.Introduction to Fault-Block Theory[M].PetroleumIndustry Publishing House,Beijing(in Chinese).
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