新疆鄯善沙尔湖中侏罗世植物群及古生态研究

Jurassic is a critical period on greenhouse climate and biodiversity evolution in Mesozoic. The study on flora is the important and indispensable way to understand and explore terrestrial ecosystem vegetation evolution change and paleoenvironmental ecology. However, due to the remote Gobi conditions of the Sha’erhu area, Xinjiang, the basal geology of the coal field, especially its Middle Jurassic flora, has been inadequate for intensive study. Based on the previous study made by the applicant, this project would integrate the analyses of the fossil mega-plants, palynomorphs, fossil cuticle biomarkers and its stable isotopes, try to comprehensively study of the Middle Jurassic floral composition and coal-forming mechanism, phytogeographic divisions, palaeoecology reconstruction from the Sha’erhu coal field, Xinjiang, by macroscopic, microscopic to molecular level methods. As fossil plants can reveal the coal matrix and forming process in biology and geology, the study of the Jurassic flora in the Sha'erhu area is very significant for better understanding of the palaeovegetation evolution, coal-forming mechanism, correlation of the coal-bearing strata, paleoclimate and paleoenvironment reconstruction even expanding the coal looking prospect, and very significant for the development of the program “One Belt and One Road”.

侏罗纪是中生代温室气候和生物多样性演化的十分关键的时期。植物群的研究是了解和探究陆地生态系统植被演替和古环境生态的重要且不可或缺的途径。新疆沙尔湖地区由于地处戈壁荒漠，以往的基础地质，特别是中侏罗世植物化石，一直缺乏深入研究。本课题拟在申请者以往研究基础上，通过植物大化石、孢粉、化石角质层生物标志化合物及稳定碳同位素分析等多种方法相结合，从宏观、微观到分子水平较完整地恢复新疆沙尔湖煤田的中侏罗世植物群组成面貌，成煤植物分析以及古植物地理分区、古生态恢复等。由于古植物化石可以揭示煤炭资源的物质来源的生物学与地质学特征，该化石植物群研究对深入开展沙尔湖地区古植被演化、成煤机制、含煤地层对比、时代确定、恢复古气候和重建古环境、扩大找煤远景、促进“一带一路”建设等具有十分重要的意义。