新生代晚期青藏高原强烈隆起及其对周边环境的影响

详细信息

收稿日期: 2001-05-02

修回日期: 2001-06-29

刊出日期: 2001-10-25

Late Cenozoic intensive uplift of Qinghai-Xizang Plateau and its impacts on environments in surrounding area

- 1.
  Department of Geography,Lanzhou University,Lanzhou 730000;
- 2.
  College of Geography Science,Nanjing Normal University,Nanjing 210097

Received Date: 02 May 2001

Revised Date: 29 June 2001

Publish Date: 25 October 2001

摘要: 青藏高原主夷平面形成的上限年龄为3.6MaB.P.,临夏盆地新生代湖相沉积同时结束,青藏运动开始,分为A(3.6MaB.P.),B(2.6MaB.P.)和C(1.7MaB.P.)3幕,A幕现代亚洲季风形成,B幕黄土开始堆积,C幕黄河出现;昆黄运动(1.2～0.6MaB.P.)使黄河干流切入青藏高原,大面积山地进入冰冻圈,可能导致中更新世之气候转型;共和运动造成黄河切穿龙羊峡,青海湖孤立,高原达到现代高度.中国三大自然区是高原隆升驱动大气环流改变而导致的中国最高层次的景观分异.本文讨论了8MaB.P.的有限高度隆升及亚洲干旱化的问题,亚洲夏季风22MaB.P.已经开始,是高原隆升及其它因素共同作用的结果,为亚洲古季风阶段.3.6MaB.P.才是现代亚洲季风真正开始的时期,可能北半球进入冰期也与此有密切关系.
- 新生代晚期 /
- 青藏高原 /
- 构造隆升 /
- 环境变化
Abstract: Studies on the uplift timing of Qinghai Xizang Plateau and long term climatic records in and around the Plateau hold the key to understand the mechanisms of continental collision mountain building and its coupling with or impacts on regional and global climatic changes( e.g., the formation and evolution of the Asian monsoon,drying of the Asia,global cooling,periodicity and magnitude of climatic change) in Pleistocene.
- late Cenozoic /
- Qinghai Xizang Plateau /
- tectonic uplift /
- environmental change