早白垩世中晚期全球重大地质-环境事件频发，早期被子植物快速演化，是认识白垩纪生态环境演变的关键期，但目前有关大陆内部环境变化及早期被子植物的研究十分薄弱。亚洲内陆地区的银-额盆地（内蒙古西部）下白垩统河湖相地层发育，并具有很好的火山岩绝对年龄和古地磁年代基础，是罕见的研究陆地环境生态变化的理想研究材料。本项目拟在前期开展的孢粉学工作基础上，针对少量早期被子植物花粉化石发现的启示，对盆地展开详细的孢粉学研究。结合野火碳屑研究方法，首先恢复盆地晚Barremian-早Albian期间的古气候和古环境演变，与全球同期重大构造、环境变化对比联系分析大陆内部地区环境变化的规律及其潜在因素。其次利用该方法建立早期被子植物花粉演化序列，探讨该地区早期被子植物快速演化的环境驱动因素，为研究全球和区域相互作用下的生态-环境协同演化提供科学依据。

The middle-late Early Cretaceous was characterized by several major geological events and rapid evolution of early angiosperm. It is a critical period that understands the ecology and environment of the Cretaceous. However, the researches about the environment changes and early angiosperm are very lacking compare to the marine or continental-margin realm. The Yin-E Basin was located in the inner Asian which bearing the long Lower Cretaceous fluviatile-lacustrine sedimentary sequences. The present radiometric age of volcanic interlayer and magnetstratigraphic chronology provide a reliable chronostratigraphic framework. In this project, we conducted palynological and charcoal researches on the Lower Cretaceous of Yin-E Basin, based on the previous palynological work and the implication of discovery of early angiosperm pollen. Firstly, we reconstruct the paleoclimate and palaeoenvironment changes of late Barremian to early Albian times, then compare with the global major environmental changes to explore the evolvement mechanism of the inland environments. Secondly, we plan to construct the evolutionary sequence of angiosperm pollen which used to discuss the environmental driving factors for this important ecological transition. These researches will likely provide scientific basis for the co-evolution of ecology and environment.