青海玉树囊谦第三纪盆地岩相古地理研究  

Sedimentary facies and palaeogeography features of Nangqian Tertiary basin in Yushu district,Qinghai

作　　者：王世锋[1] 伊海生[2] 王成善[2] 

机构地区：[1]北京大学地质系,100871 [2]成都理工学院沉积研究所,四川成都610059

出　　处：《西北地质》2001年第1期64-67,共4页Northwestern Geology

基　　金：原地矿部"九五"重大基础研究项目!"地质记录与青藏高原隆升"子课题"重要盆地的沉积记录与高原隆升"资助

摘　　要：从盆地沉积特征及地层古生物入手 ,通过分析早第三纪囊谦盆地气候环境 ,认为属湿润多雨的热带 -亚热带气候。盆地岩相古地理揭示 ,盆地早期为反映构造活动强烈的冲积扇 -辫状河三角洲 -湖泊沉积组合 ;晚期为反映构造稳定的河流 -湖泊 -小型扇三角洲沉积组合。Through studying features of sedimentary and stratigraphic paleontology in Nangqian Tertiary basin,the authors point out the climate at Early Tertiary in basin is tropical subtropical and rainy,the basin is not more than 1 000 m above sea level.The sedimentary faces and palaeogeography discover that in early basin development sedimentary assemblage is fan braided delta lake which reflects tectonic active;in mature basin development the sedimentary assemblage is river lake delta

关 键 词：囊谦第三纪盆地 沉积组合 岩相古地理 古气候 沉积环境 地层古生物 

分 类 号：P534.61[天文地球—古生物学与地层学]