西藏江孜盆地的层序地层分析与沉积充填演化  

Analysis of Sequence Stratigraphy and Depositional Filling in the Gyangze Basin ,Tibet

作　　者：李金高[1] 周祖翼[1] 王全海 刘鸿飞 彭勇民[4] 姚鹏[4] 

机构地区：[1]同济大学,上海200092 [2]中国地调局西南项目办公室,成都610082 [3]西藏地质矿产勘查开发局,拉萨850000 [4]成都地质矿产研究所,成都610082

出　　处：《沉积学报》2001年第4期488-492,共5页Acta Sedimentologica Sinica

基　　金：西藏地矿厅和西藏自治区科委 (990 1 0 7)

摘　　要：在区域性盆地研究的基础上 ,通过对沙拉岗锑 (金 )矿区沉积相与层序地层分析 ,初步识别出Ⅰ类和Ⅱ类不同性质的层序界面 ,划分出 8个三级层序 ,包括 2个Ⅰ类层序和 6个Ⅱ类层序 ,所有层序均具有清晰的三分结构。将江孜盆地斜坡背景的沉积充填演化划分为四个阶段 :相对陡的陆源斜坡阶段、相对平缓的陆源斜坡阶段、硅质海底扇阶段。Based on the detailed regional geological setting analysis,this paper deals with the research of ore bearing basin,the depositional facies and sequence stratigraphic analysis have been done for the first time in Shalagang mining region.And all kinds of characteristic gravity flow sediments,for erample,slide,debris flow and turbidity deposits,are significantly documented. Siliceous submarine fans made up of different grain sizes and different types of siliceous rock are also discovered for the first time in Gyangze basin.The evolution stages of depositional filling with slope setting are divided in Gyangze basin

关 键 词：江孜盆地 层序地层 沉积充填 西藏 沉积环境 陆源斜坡 

分 类 号：P539.2[天文地球—古生物学与地层学] P512.2[天文地球—地质学]