Study on the Geological Conditions of Landslide Disaster in the North-south Trough-type Fold Deformation Zone in Fenggang County,Guizhou
The unique geological structure of the Fenggang north-south trough-fold deformation zone has formed a typical Jurassic mountain fold combination area,which is closely related to landslide development.In this study,based on field investigations and data analysis,the geological conditions for landslide susceptibility in the study area were explored by examining the relationship between factors such as geological structures,land-forms,lithology,and river distribution.The results indicate that landslides in the study area mainly develop in regions with severe intersecting geologic structures.They are predominantly found on longitudinal and oblique slopes with a height difference of 100～300 m and a gradient of 25°～35°,while the dominant landform type is eroded-karst valley terrain.The lithology of the landslide-prone strata shows a tendency,mainly consisting of mudstone and shale from the Silurian Liandovery Hanjiadian formation,shale and sandy shale from the Lower-Middle Ordovician Meitan formation.The average influence range of rivers on landslides in the study area is 900 m,with a decreasing number of landslides farther away from the rivers.
万方数据
维普
