【摘要】 西藏雅鲁藏布江中游高山峡谷地区，因地质构造复杂、新构造运动活跃且地质灾害频发，导致该区域地质构造极为脆弱，其地质环境备受关注。文章系统分析了该区域的地质构造、地层、岩性和地貌特征等孕灾地质背景，揭示了桑日-朗县段崩塌、滑坡等地质灾害发生规律与地质背景间的内在联系。在此基础上，进一步评价了不同地质条件下该地区的地质灾害风险等级。研究结果对桑日-朗县段地质灾害的防治工作具有一定指导意义，也为类似地质环境区域的灾害风险评估提供了参考。更多还原

【Abstract】 High mountain gorge terrain, located in the middle reaches of the Yarlung Zangbo River in Xizang, is characterized by complex geological structures and active neotectonic movements, resulting in frequent geological disasters. It makes the region’s fragile geological environment a subject of significant concern. This paper systematically analyzes the disaster-prone geological background characteristics in this region, including its geological structure, stratigraphy, lithology, and geomorphological features. It reveals the intrinsic relationship between the occurrence patterns of geological disasters, such as collapses and landslides in the Sangri-Langxian section, and their geological background. Based on this analysis, this study further assesses the geological disaster risk levels under different geological conditions in this area. These findings not only provide valuable guidance for geological disaster prevention and mitigation efforts in the Sangri-Langxian section but also serve as a reference for geological disaster assessment in similar geological environments.更多还原