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涉县地震活动特征及其构造背景
周月玲, 王晓山, 边庆凯, 孙丽娜
河北省地震局, 石家庄 050021
摘要:
本文采用地质地貌调查、地震活动性分析和地质测年等方法,研究了涉县地区地震和构造的活动特征,并归纳总结涉县6.0级地震发生的构造条件,即:①震中位于大型地震带与地震亚带交汇区,现今地震活动性仍然较高;②震区附近发育1条规模较大、活动性较高的控制山盆界限断裂-涉县断裂;③震中位于孤立的涉县断陷盆地区边缘,山盆新构造运动差异。
关键词:  涉县地震  断裂活动性  地震密集带  太行山隆起
DOI:
分类号:P315
基金项目:地震科技星火计划青年项目(XH180302Y)、河北省地震科技星火计划项目(DZ20170503012、DZ20180319009、DZ20190423053)共同资助
Seismicity Characteristics and Tectonic Background of Strong Earthquake of Shexian
Zhou Yueling, Wang Xiaoshan, Bian Qingkai, Sun Lina
Hebei Earthquake Agency, Shijiazhuang 050021, China
Abstract:
In this paper,the characteristics of seismicity and tectonics of Shexian area are studied through geological and geomorphological survey,seismicity analysis and geochronology analysis,and the tectonic background for the occurrence of Shexian MS6.0 earthquake are summarized as follows:①The epicenter of the MS6.0 earthquake is located in the intersection area of large-scale seismic belt and seismic sub belt,and the seismicity is still high at present;②The conjugate faults in NE and NW directions are developed near the earthquake area,and there is a large-scale and highly active fault-Shexian fault,which controls the boundary of mountain basin;③The epicenter of the MS6.0 earthquake is located on the edge of the isolated Shexian faulted basin area,and the basin mountain neotectonic movement is different in some aspects.
Key words:  Shexian earthquake  Fault activity  Seismic dense zone  Taihang mountain uplift