三峡大学学报（自然科学版）2024，Vol.46Issue(1)：49-56,8.DOI:10.13393/j.cnki.issn.1672-948X.2024.01.008
三峡库区万县复向斜构造特征及其与地质灾害分布关系
Distribution Characteristics of Geological Disasters in Wanxian Syncline in Three Gorges Reservoir Area
摘要
Abstract
Wanxian syncline is located in the composite part of eastern Sichuan fold belt and Dabashan-Dahongshan structural belt.Previous studies focused on basic geology and shale gas exploration,but there are few studies on the internal relationship between local structural characteristics of Wanxian syncline and geological disasters.In this paper,based on field geological investigation and study,and by using survey data of landslides,structural geology,and engineering geological analysis method,the control effect of local structure of Wanxian syncline on geological disasters is studied in depth.The Wanxian syncline can be divided into three parts;i.e.,the western NE trending structure superimposed structure area,the NE-trending area of the central,and the EW-trending area of the eastern anticline(which is also the extinct part of the anticline).Corresponding to the local structure,the internal geological hazard is also divided into three regions;i.e.,western,central and eastern.The results show that the geological disasters in the westward part have a small development scale,mainly concentrated in the local longitudinal valley section;the geological disasters in the central part are concentrated in the northern bank of the Yangtze River,and the existence of the conversion zone of steep and gentle dip angles of strata has a controlling effect on the scale of geological disasters;the geological disasters in the east are concentrated in the south bank of the Yangtze River.In addition to the existence of the steep and gentle dip angle conversion zone of rock strata,the slope length and the characteristics of steep dip occurrence in rock strata also have important control effects on the scale of geology.The study results reveal the intrinsic relationship between the internal structural characteristics in Wanxian syncline and the geological disasters in the area,and provides a certain reference and basis for the prediction and prediction of geological disasters in the study area.关键词
万县向斜/地质灾害/滑坡/局部构造Key words
Wanxian syncline/geological disasters/landslides/local structure分类
天文与地球科学引用本文复制引用
王岚,许晓亮,周准,张凯元..三峡库区万县复向斜构造特征及其与地质灾害分布关系[J].三峡大学学报（自然科学版）,2024,46(1):49-56,8.基金项目
国家自然科学基金项目(U2034203) （U2034203）
