High-Resolution Sequence Stratigraphic Study on the Palaeogene Suweiyi Formation in Kuqa Depression of Xinjiang Region and Discussion on Its Major Controlling Factors oft-com:office:office" />
Kuqa Depression lies at the northern margin of Tarim Basin, nearby the southern oft-com:office:smarttags" />TianshanMountain.The Palaeogene Suweiyi Formation was formed during foreland basin developing phase and thick fluvial-delta and lacustrine sediments were deposited.The unique location of Kuqa Depression and the large range successive outcrops of Suweiyi Formation provide favorable room to carry out the high-resolution sequence stratigraphic study and the major controlling factors discussion.Based on the relative distinguishable flooding surface, the Suweiyi Formation is classified into ten 4th order sequences and a number of 5th order sequences or parasequences.The characteristics of 4th order sequences and the stacking patterns of parasequences indicate that under the tectonic subsidence background, the interplay of climate, lake level fluctuation and depositional supply controlled the development of the high order sequences.