地质力学学报2025，Vol.31Issue(1)：124-138,15.DOI:10.12090/j.issn.1006-6616.2023085
活动断层的避让距离与影响范围——以理塘断裂为例
Avoidance distance and influence range of active faults:A case study of Litang fault
摘要
Abstract
[Objective]Active faults can not only trigger strong earthquakes,but also cause engineering breaks,creep deformation,and geological disasters,which seriously threaten the planning,construction,and safe operation of major projects.[Methods]In this study,based on the statistics of coseismic surface ruptures,the avoidance distances of faults with different properties and the ranges of extremely strong,strong,less strong,and moderately affected areas of active fault zones are established.Remote sensing,a geological survey,dislocation landforms,and shallow seismic exploration were used to analyze,the avoidance distance and affected area of the Litang fault on the Qinghai-Tibet Plateau.[Conclusion]This study concludes that the hanging wall and footwall avoidance distances of normal faults are not less than 30 m and 15 m,respectively;the hanging wall and footwall avoidance distances of thrust faults are not less than 45 m and 15 m,respectively;the avoidance distance of strike-slip faults is not less than 30 m.The Litang fault is mainly characterized by strike-slip with normal fault components,and its hanging-wall avoidance distance is 30 m and its footwall avoidance distance is 15 m.The extremely strong,strongly,less strong,and moderately affected areas of the Litang fault zones are 154 m,154-500 m,500-1000 m,and 1000-3000 m,respectively.[Significance]The research provides basic data for the planning and construction of major projects and the spatial control of the national land.关键词
活动断层/避让距离/影响范围/理塘断裂/青藏高原Key words
active faults/avoidance distances/influence range/Litang fault/Qinghai-Tibet Plateau分类
地质学引用本文复制引用
杨镇,钟宁,张献兵,于皓,郭长宝,李海兵..活动断层的避让距离与影响范围——以理塘断裂为例[J].地质力学学报,2025,31(1):124-138,15.基金项目
国家自然科学基金项目(42177184) （42177184）
中国地质调查局地质调查项目(DD20221816) （DD20221816）
中国博士后基金项目(2019M650788)This research is financially supported by National Natural Science Foundation of China(Grant No.42177184) （2019M650788）
Project of China Geological Survey(Grant No.DD20221816)and Chinese Postdoctoral Science Foundation(Grant No.2019M650788). （Grant No.DD20221816）
