中文摘要：

黄河上游拉干峡一寺沟峡段共发育特大型滑坡116处，群尖盆地无论是数量还是强度上都占到了绝对优势，这与其所处的特殊构造部位和昆黄运动时期各大断裂带运动性质的转变直接相关；高原掀斜式隆升过程导致各大支流水系特大型滑坡西岸多发于东岸。研究区特大型滑坡有明显的4个群发期，各期都有其不同的触发因素，50ka和30ka属构造和气候的耦合成因，lOka为构造触发，5ka为降雨所致。

英文摘要：

116 large-scale landslides develop between Lagan Gorge and Sigou Gorge in the upper reaches of the Yellow River. And there, Qunjian basin has an edge over others in quantity and intensity of landslide events, as has a direct correlation with the unique tectonic position and the characteristic change of the major fracture zone during Kun Huang movement epoch. The tilting uplift process of plateau causes more large-scale landslides to occur in the west coast than the east coast along the major tributaries of river systems. Large-scale landslides were triggered by the respective factors during 4 distinct phases, i.e. before 50km and 30kin for the coupling cause of tectonic and climatic, before 10km by tectonic, and before 5kin by rainfall.