College of Earth Sciences, Jilin University, Changchun 130061, China

The eastern sag of North Yellow Sea Basin experienced complicated multi-stage tectonic evolution, and the palaeotopography of the sedimentary basin controlled the provenance, sedimentary area, direction and mode of sediment transportation. The palaeotopography of Middle Jurassic and Late Jurassic in the eastern sag was reconstructed by the calculation of denudation, the original sediment thickness and tectonic subsidence of a single well. In the J₂SQ1 period, the basin edge uplift became contiguous and the eastern uplift was emerging with two depressions formed on both sides of it. In the J₂SQ2 period, the eastern uplift expanded and became a central uplift in the sag, with the depressions on both sides of the uplift deepened, and the depression in the north gradually became the main depression. During the J₃SQ1 period, the depressions on both sides of the eastern uplift continued deepening. In the J₃SQ2 period, the depressions were uplifted, and the depositional area of the whole basin slightly decreased. Tectonic topography controlled the sediment transportation and accumulation. The paleo-uplift and paleo-slope are the depositional passway, which controlled the accumulation and distribution of sand bodies. Alluvial fan and fan delta were developed in the steep slope, while the fluvial and delta deposits were developed in the gentle slope. The depression area was the accumulation site of sediments, with underwater fan and lake developed. The eastern uplift, which was an uplift in the central of the sag not only separated the depressions, but was also a provenance.