黄河上游拉干峡——寺沟峡段特大型滑坡及其成因研究  

Research on Large-scale Landslides between Lagan Gorge and Sigou Gorge in the Upper Reaches of Yellow River

作　　者：周保[1,2,3] 彭建兵[2] 殷跃平[4] 李小林 魏刚 马小强 

机构地区：[1]长安大学地质工程与测绘学院,西安710054 [2]长安大学西部矿产资源与地质工程教育部重点实验室,西安710054 [3]青海省地质环境监测总站,西宁810100 [4]中国地质环境监测院,北京100081 [5]青海省环境地质勘查局,西宁810100

出　　处：《地质论评》2014年第1期138-144,共7页Geological Review

基　　金：国家自然科学基金(批准号41302253);国家重点基础研究发展计划项目(973)(批准号2014CB744702);"十二五"国家科技支撑项目(批准号2012BAK10B01);青海省自然科学基金(批准号2012-Z-936Q)的成果

摘　　要：黄河上游拉干峡—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,50 ka和30 ka属构造和气候的耦合成因,10 ka为构造触发,5 ka为降雨所致。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.

关 键 词：青藏高原 黄河上游 特大型滑坡 

分 类 号：P642.22[天文地球—工程地质学]