辽宁及邻区主要断裂带构造特征与地震活动性研究  

Tectonic Features of Main Faults in Liaoning Province and Adjacent Areas and the Correlation with the Seismic Activity

作　　者：黄云鹏 万波[1] HUANG Yunpeng;WAN Bo(Liaoning Earthquake Agency,Liaoning Shenyang 110034,China)

机构地区：[1]辽宁省地震局,辽宁沈阳110034

出　　处：《防灾减灾学报》2025年第2期32-43,共12页Journal of Disaster Prevention And Reduction

基　　金：辽宁省本级项目:辽宁省地震构造环境与强震风险评估(2013);辽宁省本级项目:金州断裂带(暨海城河NW向构造带)精细探测与地震危险性评价(2023)。

摘　　要：辽宁及邻区地质构造复杂,断裂发育,地震活动频繁,地震强度-频度较高。研究基于地质构造数据、地震数据及地球物理探测数据综合分析,系统地梳理了域内主要区域性断裂的展布发育特征、(晚)第四纪活动特征及其与中强地震之间的关联,判定了区域性断裂构造的活动性、分段性和地震危险性。结果表明:具有共轭结构的NE-NNE向、NW向断裂构造对于区域地震活动具有显著的控制作用,其中NE-NNE向金州断裂、鸭绿江断裂、依兰—伊通断裂和NW向海城河断裂等成为中强地震的发震构造;同时,新构造运动的差异性与地震活动强度密切相关,块体边界及过渡带地震风险较高。研究揭示了断裂活动性与构造应力场的动态耦合机制,提出了地震危险性评估的关键构造指标,为区域防灾减灾提供了科学依据。The Liaoning Province and its adjacent regions are characterized by complex geological structures,well-developed faults,and frequent seismic activities with relatively high intensity-frequency.This study conducts a comprehensive analysis based on geological structure data,seismic catalogs,and geophysical exploration data to systematically investigate the spatial distribution,Late Quaternary activity characteristics of major regional faults,and their correlations with moderate-strong earthquakes.The activity,segmentation,and seismic hazards of regional fault structures were evaluated.Results indicate that NE-NNE-trending and NW-trending conjugate fault systems exert significant control over regional seismicity.Key seismogenic structures for moderate-strong earthquakes include the NE-NNE-trending Jinzhou Fault,Yalujiang Fault,Yilan-Yitong Fault,and the NW-trending Haicheng River Fault.Furthermore,differential characteristics of neotectonic movements are closely associated with seismic intensity,with higher earthquake risks identified along block boundaries and transition zones.The study elucidates the dynamic coupling mechanism between fault activity and tectonic stress fields,proposes critical tectonic indicators for seismic hazard assessment,and provides a scientific foundation for regional disaster prevention and mitigation.

关 键 词：地震活动性 共轭剪切断裂 新构造分异 断裂带构造 海城河断裂 金州断裂 

分 类 号：P315.5[天文地球—地震学]