燕山构造带中-晚侏罗世古气候与沉积环境研究

中-晚侏罗世的燕辽生物群和早白垩世的热河生物群是世界级的化石宝库，对于两个生物群演变与古环境气候变化关系，一直以来是国内外的研究热点之一。本项研究以华北克拉通北缘燕山构造带为研究区，以构造带内具有详细地层年代学控制的中-晚侏罗世陆相沉积序列为研究对象。采取以辽西北票盆地为主，京西-下花园盆地为辅的方式，通过对上述沉积序列的沉积相、矿物学、地球化学和孢粉学等多指标交叉验证，获得燕山构造带中-晚侏罗世的气候变化曲线和沉积环境特征，结合该时期发生的构造事件，探讨晚中生代中-晚侏罗世区域重大地质-古生物-气候环境事件之间的联系。该项目对理解陆地生物群演化在古气候环境变化中的响应具有很重要的意义。

The Yanliao biota of the middle and late Jurassic and the Jehol biota of the early Cretaceous are world class fossil treasure houses. The relationship between the evolution of the two biota and the palaeo-environment and climate change has been one of the research hotspots in the world. This study takes the northern margin of the North China Craton as the research area, and takes the middle and late Jurassic continental sedimentary sequence in the Yanshan tectonic belt with detailed stratigraphic geochronology control as the research object. Based on multi-index cross validation of sedimentology, mineralogy, geochemistry and palynology of the above sequences in Beipiao basin and Jingxi-Xiahuayuan basin, the evolution history of the Yanliao biota on climate change and sedimentary environment will be reconstructed. Combined with the tectonic background, the relationship between geological-paleontology-environmental events in the middle Jurassic in late Mesozoic will be discussed. The project is important for understanding the evolution of terrestrial biota in response to changes in paleoclimate environment.