关键词: 塔西南坳陷, 塔吉克盆地, 新生代构造, 油气聚集

Abstract: Situated at the both E & W sides of Pamir, the S W Tarim and Tadjik basins have the similar evolution history of tectono sedimentary processes during Cenozoic, i.e. steady subsidence with transgressive sequence in Paleogene and speedy subsidence with continental molasse-type sediments in strong compressive tectonic environment in Neogene-Quaternery. Since Neogene, for the effect of Pamir and west Kunlun's northward moving and thrusting,there is complicated tectono-structural deformation taking place in Tadjik and SW Tarim. Neogene stratigraphic combination and later structural deformation of Tadjik basin and southwestern Tarim much resemble each other in terms of extent of transpressional processes. Paleogene in Tadjik basin is main oil-bearing sequence and many substantial oil-gas fields there have been found. So, it can be assured in comparison that there is oil-gas perspective also in southwestern Tarim region.

Key words: southwestern Tarim Basin, Tadjik Basin, cenozoic tectonics, oil-gas perspectives