摘要
在多次的野外考察和充分的室内分析的基础上，对金沙江地区河谷层状地貌系列和断陷盆地相关沉积进行了分析，系统地研究了金沙江自晚新生代以来的形成和演化。晚新生代金沙江水系的形成和演化经历了四个阶段：①３．４０ＭａＢ．Ｐ之前，为高原面形成期间的古水系阶段；②３．４０～２．００±０．２０ＭａＢ．Ｐ，为金沙江水系孕育阶段；③２．００±０．２０～１．５４±０．１７８ＭａＢ．Ｐ，为金沙江水系调整阶段；④１．５４±０．１７８ＭａＢ．
Based upon the data now available about the Qinhai-Xizang Planteau,and contrasting the uplift of the Plateau with the development of the Jinshajiang river by stages,we studied systematically the formation and evolution of the Jinshajiang River during the Late Cenozoic ,and attained the result that the formation and evolution of the Jinshajiang River has close relations with the uplift of the Qinghai-Xizang Plateau The study indicated that since the Late Cenozoic,the formation and evolution of the Jinshajiang River has undergone several stages:1 the formation stage of the Plateau surface before 3 40MaB P :the drainage system was exterior drainage 2 the embryonic stage of the River form 3 40MaB P to 2 00±0 20MaB P:interior drainages 3 the adjustment stage of the drainage from 2 00±0 20MaB P to 1 54±0 178MaB P 4 the formation and development stage of the Jinshajiang River from 1 54±0 178MaB P to present
出处
《云南地理环境研究》
1998年第2期43-48,共6页
Yunnan Geographic Environment Research
基金
国家教委博士点基金
