Seismic

log

and test data as well as the backstripping technique and trend analysis method of erosion restoration

were employed in the synsedimentary palaeogeomorphology reconstruction of basal boundaries of the lowstand system tracts(LST) of the Lower Cretaceous Tugulu Group sequence

the LST of the Paleogene sequence and the lacustrine expanding system tract of the Miocene Shawan Formation sequence in the Chepaizi area

Junggar basin.The paleogeomorphologic features of these three stages and their control on glutenite in incised valley

fan deltaic glutenite and longshore sandbody were analyzed.Based on the results of these studies

this paper summarizes the controlling patterns of the geomorphology on sandbody distributions during these three stages.The LST of the Tugulu Group sequence is characterized by sand supply from the uplift

diversion of the low uplift and "ridge"

transportation along the valley

and accumulation in the sag.The LST of the Paleogene sequence shares the similar features with the Tugulu Group sequence except for the insignificant feature of transportation along the valley

while the lacustrine expanding system tract of the Miocene Shawan Formation features in control of slope-break zone and low uplift zone on transportation and deposition of sand.