黄河中游水系的阶地发育时代  

THE AGE OF TERRACE DEVELOPMENT IN THE MIDDLE REACHES OF THE YELLOW RIVER

作　　者：岳乐平[1] 雷祥义[1] 屈红军[1] 

机构地区：[1]西北大学地质系

出　　处：《地质论评》1997年第2期186-192,共7页Geological Review

基　　金：国家自然科学基金

摘　　要：本文通过磁性地层学方法研究了兰州段黄河阶地,宝鸡段渭河阶地,洛川段洛河阶地。结果表明:兰州段黄河最高阶地为六级阶地,发育于1.40Ma B.P.,兰州地区黄河最早出现在1.60Ma B.P.。一级支流宝鸡段渭河最高阶地为五级阶地,发育于1.20Ma B.P.,宝鸡地区渭河最早出现在1.40Ma B.P.。二级支流洛川段洛河最高阶地为五级阶地,发育于1.00Ma B.P.,洛川地区洛河最早出现在1.20Ma B.P.。黄河中游水系的阶地形成,主要是由于青藏高原的隆起以及地壳不断震荡抬升作用造成的。The authors have studied the terraces of the Yellow River in the Lanzhou area, the Weihe River in the Baoji area and the Luohe River in the Luochuan area with the magnetostratigraphic method. The results show that the highest terrace of the Yellow River in the Lanzhou area is terrace VI , which was formed at 1. 40 Ma, and the Yellow River in the region appeared at 1. 60 Ma. The highest terrace of the Weihe River in the Baoji area is terrace V, which was formed at 1. 20 Ma B. P. The Weihe River in the area appeared at 1. 40 Ma B. P. The highest terrace of the Luohe River in the Luochuan area is terrace V, which was formed at 1. 00 Ma B. P. The Luohe River in the area appeared at 1. 20 Ma B. P. The uplift of the Qinghai-Tibet plateau, uninterrupted oscillation and uplift of the crust and climatic changes have controlled the terrace development of the middle Yellow River drainage system.

关 键 词：黄河中游 水系 阶地发育 发育时代 河流阶地 

分 类 号：P931.1[天文地球—自然地理学]