早白垩世陆地环境以及植被面貌发生了重大转变，但相关的研究记录还不完善，因此，更详细的时间序列上的古气候研究有利于我们了解早白垩世气候环境演变及植被特征。甘肃酒泉盆地早白垩世地层发育，富含植物化石，但研究程度较为薄弱。本项目以早白垩世显著的温室气候变化为研究背景，以酒泉盆地下白垩统保存的植物压型化石为主要研究对象，开展精细的古植物解剖构造分析和古气候定量重建方面的研究。植物体宏观枝叶形态结合角质层微细构造特征对植物化石进行准确鉴定的基础上，查明植物群组成并恢复古植被面貌。综合利用气孔指数法及有机地球化学手段，揭示研究区早白垩世古气候及其变化趋势，探讨植物化石对早白垩世温室气候变化的响应，为早白垩世陆地气候环境研究提供科学依据。

The continental environment and vegetation underwent significant changes during the Early Cretaceous, while the related records remain incomplete. More detailed time series of palaeoclimatic researches would be useful for understanding Early Cretaceous climate variation and vegetation feature. The Lower Cretaceous strata are well developed and widely distributed in Jiuquan Basin, Gansu, abundant plant fossils have been discovered, whereas some of them are poorly studied. At the background of the green-house climate of the Early Cretaceous and based on the fossil plants materials from the Lower Cretaceous of Jiuquan Basin, this project will carry out studies of both fossil plants taxonomy and palaeoclimate quantitative reconstruction. According to the leafy shoots morphology and cuticular micro-structures, the fossil plants are accurate identified, the palaeovegetation composition is ascertained and the ancient vegetation landscape is recovered. Comprehensive utilization of stomatal index and organic geochemical method, the palaeoclimate and variation trends during the Early Cretaceous in the study area are revealed. Therefore, the relationship between the plant evolution and green-house climate variation can be discussed, providing scientific basis for studying the palaeoclimate and palaeoenvironment of the Early Cretaceous.