摘要
在对2013年4月20日芦山MS7.0地震灾区大量地震地质灾害实地考察及调查的基础上,总结了滑坡、崩塌、砂土液化、地裂缝、地表变形等地震地质灾害的分布及发育特点,探讨了地震地质灾害与发震断裂之间的关系.极震区和重灾区的崩塌和滑坡特别严重,是地震巨大破坏作用的外在表现形式;砂土液化点较少,分布范围和规模有限;地裂缝和地表变形并非真正意义上的地震地表破裂带.根据极震区和重灾区地震地质灾害的分布和发育特点,认为芦山地震最有可能的发震断裂为龙门山前山断裂的双石—大川断裂,也有可能是龙门山山前隐伏断裂的大邑断裂,还有可能是双石—大川断裂与大邑断裂两者共同触发的结果.
Based on the field survey and investigation on lots of seismo-geological hazards induced by Lushan, Sichuan Province, MS7.0 earthquake on April 20, 2013, this paper summarizes the distribution and development characteristics of landslide, collapse, sandy soil liquefaction, ground fissure and ground deformation. Meanwhile, the relationship between seismo-geological hazards and seismogenic faults of the earthquake is discussed. Collapse and landslide is specially serious in meizoseismal region and severely damaged region, which is exteriorly representative of the large destructive earthquake. The spots of sandy soil liquefaction are so few that their range and scale are limited. Ground fissure and ground deformation are not true sense of the earthquake surface rupture zone. According to the distribution and development characteristics of the seismo-geological disaster induced by Lushan earthquake in meizoseismal region and severely damaged region, we think that the Shuangshi—Dachuan fault, i.e., Longmenshan front-range fault, is the most possible seismogenic fault; and buried Dayi fault of the Longmenshan piedmont fault is also possible. On the other hand, the earthquake was possibly triggered by both of the faults.
出处
《地震学报》
CSCD
北大核心
2013年第5期738-748,2,共11页
Acta Seismologica Sinica
基金
国家自然科学基金青年科学基金项目(51208234)
中国地震局地震科技星火计划青年项目(XH12021Y)资助
关键词
芦山地震
地震地质灾害
发震断裂
双石-大川断裂
大邑断裂
Lushan earthquake
seismo-geological disaster
seismogenic fault
Shuangshi-I）achuan fauh
Dayi fault
