地震工程学报2025，Vol.47Issue(3)：716-726,11.DOI:10.20000/j.1000-0844.20231027002
基于河流阶地变形的华蓥山断裂西南段活动性研究
Activity of the southwest segment of the Huayingshan fault based on river terrace deformation
摘要
Abstract
In recent years,two moderate earthquakes of magnitude 6.0 occurred near the Huay-ingshan fault zone,a critical boundary fault within the Sichuan Basin.Therefore,it is crucial to study the activity characteristics of the Huayingshan fault.From the sedimentary history analysis of the study area,river terraces were first extracted using medium-resolution digital elevation models(DEMs).These terraces were then validated using high-resolution DEM from unmanned aerial vehicles and field surveys.Finally,the spatial distribution characteristics of terraces along the Minjiang River,Jinsha River,Yangtze River,and Tuojiang River in the southwest segment of the Huayingshan fault were systematically obtained.On the basis of the deformation character-istics and formation ages of the stratified geomorphic surfaces,the southwest segment of the Huayingshan fault exhibited significant activity during the Middle Pleistocene but weakened or ceased activity in the Late Pleistocene.These findings provide critical insights for seismic hazard assessment of the southwest segment of the Huayingshan fault and the identification of seis-mogenic structures of recent moderate earthquakes.关键词
华蓥山断裂西南段/河流阶地/断裂活动性/DEMKey words
southwest segment of Huayingshan fault/river terrace/fault activity/digital eleva-tion model(DEM)分类
天文与地球科学引用本文复制引用
刘浩,梁朋,李文巧,田勤俭,张彦博,徐岳仁..基于河流阶地变形的华蓥山断裂西南段活动性研究[J].地震工程学报,2025,47(3):716-726,11.基金项目
中国地震局地震预测研究所基本科研业务费(CEAIEF20230403,CEAIEF20240402,2020IEF0603,2021IEF0104) （CEAIEF20230403,CEAIEF20240402,2020IEF0603,2021IEF0104）
国家重点研发计划项目(2023YFC3012001) （2023YFC3012001）
科技基础资源调查专项项目(2021FY10010405) （2021FY10010405）
