Abstract: Based on the apatite fission radial symptom and dynamic model of vitrinite reflectance (R), the simulation of geothermal evolution history in hinterland areas as Mosuowan and Lunan and southerm margin of Junggar basin was made. Study showed that in spite of relatively low geothermal temperature nowadays in Junggar basin, the geothermal evolution varied from time to time in each geologic history period with higher paleogeotherm than present geotherm, particularly in Paleozoic and Triassic due to the effect of tectonic movements. The average geothermal gradient of Paleozoic was up to 38 C/km or above, that of Triassic arranged from 34.6 C/km to 41 C/km. In Jurassic it was still changing considerably,which was probably due to frequent tectonic movements. Following Cretaceous, it tended to be stable in general and similar with present geothermal gradient.

Key words: Junggar basin, Vitrinite reflectance, Thermal evolution, Geologic history, Simulation, Apatite, Fission track dating