ANALYSIS OF SEQUENCE STRATIGRAPHY OF THE CARB6NIFEROUS IN THE TARIM BASIN

摘要

The Tarim Basin is located on the Tarim Plate in western China, to the south of the Tianshan Mountains and to the north of the Kunlun Mountains. It is a large superimposed basin that has long been evolving since the Sinian. In the Carboniferous, the Tarim Basin was tectonically a stable intracratonic depression. It was a vast epicontinental sea on the continental shelf, and was enclosed or semi-enclosed by the paleocontinent or islands on the south, north and east; while to the southwest it opened to the paleo-Tethys. Under the influences of factors such as cyclic changes of sea level, tectonic subsidence, climate and sediment source conditions in the Carboniferous there occurred a sequence of multitype and multicyclic carbonate rocks, evaporites, clastic rocks and transitional rocks. The sequence stratigraphic patterns of the Tarim Basin are different from those proposed by Vail et al. mainly on the basis of passive continental margin basins.