1. Laboratory for Coastal Ocean Variation and Disaster Prediction, College of Ocean and Meteorology, Guangdong Ocean University, Zhanjiang 524088, Guangdong, China; 

 The Sunwu??Zeya Basin, located in the northeast of the Songliao Basin, is a Meso??Cenozoic terres? trial residual basin superimposed depression?fault depression across the Heilongjiang River. It has good oil and gas prospects, while the degree of oil and gas exploration is relatively low. In order to reveal the tectonic and evolution? ary characteristics of the Meso??Cenozoic basins in this region, the authors used four drilling data from three major fault depressions in the Sunwu??Zeya Basin to precisely divide and compare the strata, and to restore the subsid? ence?uplift evolution history curves in different ages. The study shows that the basin has experienced three subsid? ence and two uplift events. The two large?scale uplifting events of the basin took place at 103. 4 ??93. 9 Ma and 42. 3??23. 0 Ma (33. 9 Ma in the north), respectively. The later uplifting is significantly longer in time and greater in amplitude than those of the earlier one. The main sedimentary formation time of the basin was 109. 8 Ma. The formation and evolution of the Sunwu??Zeya Basin can be divided into five stages: extensional faulting, structural in? version, whole depression, late inversion and differential uplift?subsidence, resulting in the basic structure and pat? tern of the present basin, which is characterized by lower faulting?upper depression and depression interleaved uplift.