Abstract: The Late Cretaceous lithofacies palaeogeography in southern Tibet is preliminarily studied and reconstructed through the synthetical analyses of the Upper Cretaceous sedimentary characters and its facies.The results indicate that the seawater gradually became deep，and the lithofacies belts of the littoral zone，the neritic shelf(outershelf and innershelf)，the continental slope and the abyssal basin stretched from south to north in this region，meanwhile，the reef and shoal facies of carbonate and isolate platform facies were developed above the neritic shelf facies in some local areas.Generally the basin was still of a passive continental margin，but an embryonic form of peripheral foreland basin already existed.

Key words: southern Tibet, Late Cretaceous, lithofacies palaeogeography, passive continental margin marine basin, peripheral foreland basin

摘要： 通过对藏南地区上白垩统沉积特征及沉积相进行综合分析，初步地恢复了该地区晚白垩世岩相古地理。该地区自南向北沉积水体逐步变深，沉积相带展布依次为滨海相、浅海陆棚相（外陆棚和内陆棚亚相）、大陆斜坡相及深海盆地相，局部地区浅海陆棚相之上发育碳酸盐岩礁滩相和孤立台地相等。盆地性质总体上仍然为被动大陆边缘海盆，但已具备周缘前陆盆地雏形。

关键词: 藏南地区, 晚白垩世, 岩相古地理, 被动大陆边缘海盆, 周缘前陆盆地

CLC Number: 

• P531