震源断层方法在活断层探测中的应用  

The Application of Seismogenic Fault Method in Active Fault Detection

作　　者：杨雅琼[1] 冯向东[1] 刁桂苓[1] 徐锡伟 YANG Yaqiong;FENG Xiangdong;DIAO Guiling;XU Xiwei(Hebei Earthquake Agency,Shijiazhuang 050021,China;Institute of Geology,China Earthquake Adminstration,Beijing 100085,China)

机构地区：[1]河北省地震局,河北石家庄050021 [2]中国地震局地壳应力研究所,北京100085

出　　处：《灾害学》2018年第2期70-75,共6页Journal of Catastrophology

基　　金：河北省地震局地震科技星火计划重点项目"晋冀蒙交界地区典型盆地孕震动力学模型构建"(DZ20160621076)

摘　　要：通过精确修订震源位置后,小震呈现线性或带状分布规律,使用数学方法对线性或带状分布的中小地震拟合一个空间的平面作为震源断层,来揭示地震空间分布与活动构造的关系。以1976年唐山7.8级地震、1668年郯城81/2级地震和2013年芦山7.0级盲断裂地震为例,对大震区余震的震源断层进行拟合,获得了3次地震发震断层在震源深度上的几何结构和运动方式,且拟合结果与深部构造探测比较吻合,表明震源断层方法对于活断层探测有重要的补充意义。The precisely relocated hypocenter of small earthquakes shows linear or zonal distribution,which can be used to determine the quantitative geometries of seismogenic fault by fitting a spatial plane through mathematical method and then to reveal the relationship between the earthquake spatial distribution and active tectonics.Using the seismicgenic fault fitting method,the geometries structure and motion mode of the seismogennic fault of the 1976 Tangshan M7.8 earthquake,the 1668 Tancheng M8 1/2 earthquake and the 2013 Lushan M7.0 blind earthquake is determined,the parameters is relatively consist with researches of deep structure detections which shows that the seismicgenic fault fitting method has important significance to active fault detection.

关 键 词：活断层 震源断层拟合 唐山8.0级地震 郯城8 1/2级地震 芦山7.0级地震 

分 类 号：P315[天文地球—地震学] X43[天文地球—固体地球物理学]