Abstract: The Gyirong faulted basin, located in the northern slope of Himalayas, received over 300m 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.

Key words: late Cenozoic, Gyirong basin, uplift of Tibetan plateau, coupling between tectonics and climate

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300m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。

关键词: 晚新生代, 吉隆盆地, 青藏高原隆升, 构造与气候耦合