中文核心期刊
CSCD来源期刊
中国科技核心期刊
RCCSE中国核心学术期刊

重庆交通大学学报(自然科学版) ›› 1997, Vol. 16 ›› Issue (1): 15-20.

• • 上一篇    下一篇

白龙江流域第四纪以来地貌发育基本模式研究

陈洪凯1, 李吉均2   

  1. 1. 重庆交通学院岩土工程研究所, 630074;
    2. 兰州大学地理系, 730000
  • 收稿日期:1995-12-18 出版日期:1997-02-24 发布日期:2016-11-14
  • 作者简介:陈洪凯,男,30岁,副教授
  • 基金资助:
    (兰州大学)国家教委博士点基金资助项目成果之一

General Approach on Geomorphologic Evolution in Bailongjiang Basin since Quaternary

Chen Hongkai1, Li Jijun2   

  1. 1. Inst. of Geotechnical Engineering, Chongqing Jiaotong Institute;
    2. Dept. of Geography, Lanzhou University
  • Received:1995-12-18 Online:1997-02-24 Published:2016-11-14

摘要: 基于实地考察和室内分析表明,白龙江流域上游、中游及中上游过渡地区分别发育有2级、3级、4级和6级阶地;T4~T6发育于早更新世,T3发育于600Ka·B·P·左右;由上游地区T2、中游地区T4和中上游过度地区T6的顶面构成区内广泛存在的地貌宽谷面,面顶拔河床420余米,是现代泥石流发育的源区所在;第四纪以来,区域绝对隆升量近1200m,早更新世、中更新世至全新世及全新世隆升速率分别为43B、70B和100B.区域隆升特性与青藏高原主体隆升模式相一致,但在地貌发育过程中穿插有比较强烈的泥石流活动过程,加布拉间冰期的早、晚期发育有两次明显的泥石流沉积,这一地貌发育模式也是青藏高原东部边缘地区地貌发育的基本规律.

关键词: 白龙江流域, 第四纪, 阶地, 地貌发育, 泥石流

Abstract: On the basis of investigations in field and testings in laboratory,we have concluded the basic geomorphologic evolution in Bailongjiang basin.The results have identified that 2、4 and 6 terraces are exsisted respectively in upstream zone,medstream zone and trasient zone between upstream and medstream of the basin. T4-T6 and T3 were formed in earlier Quaternary and 600 Ka·B·P· respectively.The tectonic upheavl mode in the basin is consistent with that in Qinghai Xizang plateau,but it used to be weaker.Catastrophic geomorphologic processes such as debris flow and landslide are quite obvious in the course of the geomorphologic evolution in the basin.There are at least two old typical debris flow sediments in T3 profile,occuring in earlier and latter times of kabula interglaciation.

Key words: bailongjiang basin, Quaternary, terrace, geomorphologic evolution, debris flow