吉隆盆地构造、环境演化与青藏高原隆升  

Tectonic and Environmental Evolution of Gyirong Basin,and its Relationship to the Uplift of Tibetan Plateau

作　　者：王德朝[1] 张进江[1] 杨雄英[1] 戚国伟[1] 

机构地区：[1]造山带与地壳演化教育部重点实验室北京大学地球与空间科学学院,北京100871

出　　处：《北京大学学报（自然科学版）》2009年第1期79-89,共11页Acta Scientiarum Naturalium Universitatis Pekinensis

基　　金：国家自然基金资助项目(40572115)

摘　　要：位于喜马拉雅北麓的晚新生代吉隆断陷盆地,在中新世晚期—上新世沉积了总厚约300 m的河湖相地层。根据沉积学、碳氧同位素及控盆构造分析,结合已有的古生物学孢粉学资料,恢复了晚新生代盆地构造控制、沉积环境、气候变动及其演变过程;探讨了构造演化和气候变动两者之间的耦合关系;指出盆地由早期半封闭型断陷湖盆,中期开放型湖盆,向后期封闭型湖盆的演化。The Gyirong faulted basin, located in the northern slope of Himalayas, received over 300 m thick sediments of lacustrine and fluvial facies scince late Miocene to early Pleistocene. Based on the analyses of the sedimentology, carbon-oxygen isotope and basin-controlling structures, integrated with previous studies of paleontology and palynology, this paper gave reconstructions on the controlling structures, sedimentary environment, climate changes and the evolutionary processes of this basin in the late Cenozoic. The coupling relationship between tectonic evolution and climate changes was also discussed. This study shows that the Gyirong basin underwent a evolution successively from a half-closed faulted lake basin in the early stage, to an open lake basin in the middle stage, and to a closed lake basin in the final stage.

关 键 词：晚新生代 吉隆盆地 青藏高原隆升 构造与气候耦合 

分 类 号：P542[天文地球—构造地质学]