摘要
大布苏湖为构造断陷的封闭湖盆，现代沉积环境的研究表明，自湖岸 到湖心，其平均粒径依次递减．钻孔岩芯的粒度分析和年代测定揭示，全新世以 来，大布苏湖有两次高湖面和两次低湖面时期．晚全新世以来，湖面波动式下降， 湖水浓缩而演变为我国东部地区罕见的盐湖．
Dabusu lake is a tectonic fault closed lake basin. The research of sedimentary envi- roment can be used to indicate that the average diameter of the sedimentation decreased suc- cessively from the bank facies to the the center facies of the lake. Two high lake surface peri- ods and two low lake surface surface periods in Dabusu lake since Holocene are revealed from the analysis associated with the grain size of the core and dating. Since late - Holocene, due to the descent of the lake surface and the concentration of the water of the lake. Dabusu lake gradually evoluted an exceptionally salty lake in the eastern area of China.
出处
《东北师大学报（自然科学版）》
CAS
CSCD
2000年第2期117-122,共6页
Journal of Northeast Normal University(Natural Science Edition)
基金
国家自然科学基金!(49671077)
关键词
大布苏湖
全新世沉积相
粒度特征
湖面波动
Dabusu lake
sedimentary facies of Holocene
grain size characteristics
fluctua- tion of lake surfa,
