青藏高原隆升过程与环境变化  

Environment Change and Uplift of Qinghai-Tibetan Plateau

作　　者：高红山[1] 潘保田[1] 李吉均[1] 隋玉柱[2] 

机构地区：[1]兰州大学西部环境教育部重点实验室,甘肃兰州730000 [2]青岛大学环境科学与工程系,山东青岛266071

出　　处：《青岛大学学报（工程技术版）》2004年第4期40-47,共8页Journal of Qingdao University(Engineering & Technology Edition)

基　　金：国家自然科学基金项目 (4 0 1 71 0 1 0 ) ;教育部博士点基金项目 (2 0 0 30 730 0 1 7) ;教育部青年教师奖励基金 (教人司 2 0 0 0 2 6 )

摘　　要：根据近期研究成果 ,陆陆碰撞的初期发生在为 60～ 65Ma ,但此时青藏高原并未发生大幅度的隆升。而在此后的 3 7～ 3 .6Ma期间 ,青藏地区经过两次隆升与两次夷平 ,形成了目前高原及其周缘山地广泛分布的两级夷平面 (山顶面与主夷平面 )。其中山顶面形成于渐新世 ;主夷平面形成于新第三纪 ,结束于 3 .6Ma ,当时海拔不超过 1 0 0 0m。所以青藏高原的形成是多期脉动性隆升的结果。综合新生代以来全球性重大的构造气候事件 ,可以发现它们与青藏高原隆升历史具有良好的时间耦合性。The collision between the Indian and Eurasian Plates during 60～40 Ma ago resulted in the complete closure of the Tethys and the formation of Qinghai-Tibetan Plateau as a continent, but the altitude of the surface was very low in the period. At present, there are two planation surfaces (Summit Surface and Main Surface) in the Qinghai-Tibetan Plateau. The Summit Surface had been formed in Oligocene and early Miocene, and the Main Surface was formed during 7～3.6 Ma B.P. Then its height was lower than (1 000) m a.s.l. Breaking up of the Main Surface at 3.6 Ma B.P. indicates the beginning of intense rise of the Qinghai-Tibetan Plateau. This infers the uplift of Qinghai-Tibetan Plateau is multistage, heterogeneous. A good corresponding relationship between the occurrences of important climatic changes and the intense tectonic movements of the Qinhai-Tibetan Plateau in the Cenozoic implies that they are closely linked. It is possible that the uplift of the Qinghai-Tibetan Plateau was one of the important factors controlling the climatic change in the Cenozoic.

关 键 词：隆升过程 环境变化 青藏高原 新生代 

分 类 号：P542[天文地球—构造地质学]