The high-resolution sedimentary records of the Tarim Basin(TRB)play a crucial role in understanding the uplift of the Tibetan Plateau,Asian drying as well as global climate changes.The establishment of reliable chronostratigraphic frameworks is very important to probe into sedimentary environments,tectonic movements and the paleoclimate evolution of the TRB sediments of the Late Cenozoic.In this study we present detailed rock magnetic and magnetostratigraphic investigations of the ZK3 and ZK5 borehole sequences from the Korla area of TRB.In the ZK3 borehole,the Mid/Lower Pleistocene boundary(0.78Ma)is placed at 54.8 mdepth,the Pliocene/Pleistocene boundary (2.58Ma),at 167.0 mdepth;and the Miocene/Pliocene boundary(5.33Ma),at 432.0 mdepth. The bottom of the ZK3 borehole is at around 6.2Ma,belonging to the upper part of the Upper Miocene.In ZK5 borehole,the boundaries of the Mid/Lower Pleistocene and the Pliocene/Pleistocene are located at 64.7 mand 241.5 m,respectively.The bottom of the ZK5 borehole is at around 3.2Ma, belonging to the Upper Pliocene.Age-depth-accumulation relationship of the ZK3 borehole sedimentary sequence indicates a period with relatively higher sediment accumulation rate during the period of 3.0- 3.6Ma,which suggests an episode of rapid tectonic uplift in the northern Tianshan Mountain.In terms of the comparison of sediment accumulation rates of different geological sections between eastern and western China sedimentary basins,we suggest that this tectonic movement has the character of quasi-synchronous activity in the region and shows synchronous changes with the rapid tectonic uplift of the Tibetan Plateau since the Late Miocene,which may be related to the tectonic uplift effect of the Tibetan Plateau.