关键词: 满西地区, 构造演化, 阿-满低梁, 轮南古隆起, 哈得逊隆起, 塔里木盆地

Abstract:

Since Tarim movement at the end of Pre-sinian, the west Manjiaer Depression has experienced about 6 major tectonic evolution stages. Sinian-Ordovician was the formation stage of intra-cratonic depression and Awati-Manjiaer( or A-Man) low ridge,which was a large,wide, low-amplitude one with the high point near Manxi-1 Well. Silurian-Devonian was the formation stage of intra-cratonic compressive bending depression and Lunnan paleo-uplift. Owing to the strong early Hercynian movement at the end of Devonian, Yingmaili-Lunnan paleo-uplift turned into two separate uplifts. At the same time, A-Man low ridge moved westward and was compressed into a narrow one. Carbonifernus-Permina was the formation stage of intracratonic rifting depression and inherited development of the Lunnan paleo-uplift, whereas the Triassic was the formation stage of quasi-foreland depression and deformation of the paleo-uplift. After the strong In-dosinian movement at the end of Triassic, the west Manjiaer region entered a new stage of inland depression and formation of Hadexun Uplift during the Jurassic to Paleogene. The Hadexun is a nose-shaped uplift dipping northeast, which is directly opposite to the trend of Lunnan plaeo-uplift. The Neogene was also an important stage, Manjiaer Depression, together with the North Tarim uplift, were changed into the foreland slope of Kuche foreland basin, and the Hadexun Uplift was finally fixed.

Key words: West Manjiaer region, tectonic evolution, A-Man low ridge, Lunnan Paleo-Uplift, Hadexun Uplift, Tanm Basin