Constraints of Sedimentary Records on Cretaceous Paleoclimate Simulation in China Mainland

Paleoclimate modeling study had become an important method in studying Cretaceous paleoclimate. But some boundary conditions are unclear. In this article, the distribution of land and ocean is showed, and the paleotopography through Cretaceous is reconstructed using sedimentary records. During Early Cretaceous, Karakorum Gulf occurred in Southwestern Xinjiang and Wusuli Gulf was at eastern Songliao Basin, northeast of China. Global sea level rose during Late Cretaceous. It made Tethys extend northward. Southwest Tarim Gulf and Karakorum Gulf lay in Western Xinjiang. And Wusuli Gulf had exited from Northeastern China. Da Hinggan Mountain, Tianshan Mountain, Qilian Mountain, Kunlun Mountain, Hengduan Mountain, Qinling-Dabie Mountain, and West Sichuan Plateau, Yunnan-Guizhou Plateau had been existed and they may have reached some altitude during Cretaceous. It has been regarded that East plateau and Southeast Ridge had significant influence on Cretaceous climate condition in China. Furthermore, the effect of validations between paleoclimate modeling study and sedimentary records has been discussed.