三江并流形成时代的初步探讨  

THE TENTATIVE INQUIRY ON THE FORMATION TIME IN THE REGION OF THREE PARALLEL RIVERS

作　　者：明庆忠[1] 史正涛[1] 

机构地区：[1]云南师范大学旅游与地理科学学院,云南昆明650092

出　　处：《云南地理环境研究》2006年第4期1-4,共4页Yunnan Geographic Environment Research

基　　金：国家973子计划(2003CB415105-10);国家自然科学基金(40462002;40161002);云南省自然科学基金重点项目(2004D0005Z)

摘　　要：滇西北三江并流区是世界上独特的纵向岭谷地貌区、世界自然遗产地。金沙江、怒江、澜沧江3条大江的阶地、河谷主要沉积物均为中更新世以来所形成,说明三江并流这一独特地貌—水文现象形成于中更新世及以后的时间。中更新世昆黄运动是西南纵向岭谷乃至中国的地貌—河流发育重要转型事件,奠定了西南纵向岭谷区的自然地理格局,影响了三江并流区的现代地表过程和生态环境变化。The region of three parallel rivers in Northwest Yunnan is the unique landforms region which has longitudinal range-gorge, it＇s the natural heritage area in the world .The main sediments in the terrace and river valley of Jinsha River, Nu River, and Lancang River have all formed since the middle Plerstocene, which explains the special landforms and hydrological phenomenon formed in middle Pleistocene and developed afterward. Kunhuang Movement is the significantly transforming event of landforms and river development in the longitudinal rangegorge region and even in China. It established the natural geography structure in the longitudinal range-gorge region. In addition, it affected the modem process of the earth＇s surface and resulted in the change of the ecological environment.

关 键 词：三江形成时代 纵向岭谷 中更新世 阶地 沉积物 

分 类 号：P54[天文地球—构造地质学]