Abstract: On the basis of field outcrops， drilling and seismic data， through the methods of regional unconformity identification，apatite fission track age analysis and buried hydrocarbon generation history recovery，the main tectonic events of Meso-Cenozoic in Zhangpenggou area in the eastern Junggar Basin and their effects on hydrocarbon accumulation were studied. The results show that： （1）There are four stages of regional unconformity in the Meso-Cenozoic era in Zhangpenggou area，namely，the unconformity between Jurassic Badaowan Formation and Triassic Xiaoquangou Formation（J₁b/T_2-3xq），the unconformity between Cretaceous Tugulu Group and Jurassic Shishugou Group（K₁tg/J_2-3sh），the unconformity between Neogene Shawan Formation and Cretaceous Tugulu Group（N₁s/K₁tg）and the unconformity between Quaternary and Neogene Shawan Formation（Q/N₁s），which respectively correspond to four tectonic uplift events，namely，the Late Triassic to Early Jurassic compressional uplift，Late Jurassic to Early Cretaceous compressional uplift，Late Cretaceous to Paleocene uplift and tilting， and Miocene to present continuous uplift and denudation. Each tectonic event has obvious regional tectonic background and geological response such as folds and faults.（2）The uplift of the Late Triassic to Early Jurassic in the study area resulted in a decrease in the rate of hydrocarbon generation of the source rocks and the thermal evolution of hydrocarbon. The fault generated by the Late Jurassic-Early Cretaceous compressional uplift event became an effective channel for hydrocarbon transmission，which matched well with the hydrocarbon filling period，and was a key structural event for hydrocarbon accumulation. Late Cretaceous to Paleocene uplift and tilting，and Miocene to present continuous uplift play a role in the reconstruction and destruction of later oil reservoirs. The formation of Kelameili fault has a controlling effect on hydrocarbon accumulation in the study area.（3）The oil source in the study area mainly comes from Middle Permian Pingdiquan Formation，and the reservoir accumulation model is near-source lateral migration self-generation and self-storage type. Hydrocarbon accmulated in lithologic shielding area and high structural parts of the anticline wing. The faults and unconformities generated by tectonic movement control the plane hydrocarbon distribution. The Permian Pingdiquan Formation near faults and unconformities is a favorable area for hydrocarbon exploration.

Key words: Kelameili fault, unconformity, apatite fission track, buried hydrocarbon generation history, structural reservoir, lithologic reservoir, Meso-Cenozoic, Zhangpenggou area, eastern Junggar Basin