内蒙古乌尼特煤田下白垩统分散角质层研究  

DISPERSED CUTICLES FROM THE LOWER CRETACEOUS WUNITE COAL FIELD IN INNER MONGOLIA

作　　者：马福军[1] 徐小慧[1] 李瑞云[1] 万震[1] 孙柏年[1] 闫德飞[1] 

机构地区：[1]兰州大学地质科学与矿产资源学院,兰州730000

出　　处：《微体古生物学报》2013年第3期244-262,共19页Acta Micropalaeontologica Sinica

基　　金：国家自然科学基金项目(41272026);高等学校博士学科点专项科研基金(No.20120211110022);兰州大学中央高校基本科研业务费专项资金(lzujbky-2013-112)共同资助

摘　　要：在内蒙古中东部乌尼特煤田下白垩统发现了保存良好的植物化石分散角质层,含分散角质层的岩段可自下而上分为6小层,对各小层内角质层进行了分析。根据对不具气孔和具气孔分散角质层微观构造的研究,推测了不同类型分散角质层的母体植物。结果表明:当前分散角质层可能来自松柏纲的Athrotaxites与Manica;苏铁纲的Pterophyllum与Zamites;银杏纲的Ginkgo,Baiera和Czekanowskia。此外,在岩石样品发现有丰富的分散孢粉,以Ginkgoretectina,Bennettiteaepollenites,Cycadopites,Taxodiaceaepollenites,Podocarpidites为主,孢粉指示的母体植物与分散角质层的母体植物类型有较好的一致性。当前推断的母体植物组合特征,表明该区在早白垩世总体应属于温暖而潮湿的气候,并具有季节性变化的特征。Well-preserved dispersed cuticles were found in the Lower Cretaceous Bayanhua Formation of Wunite Coal Field in Inner Mongolia. The fossil-bearing rock member can be divided into 6 successional layers. Athrotaxites type, Manica type, Pterophyllum-type, Zarnites-type, Ginkgo types, Baiera types, Czekanowskia types have been de duced as the parent plants for dispersed cuticles according to the characteristics of the epidermal structures. Also, abundant spores and pollen grains were obtained from the same samples,mainly including Ginkgoretectina, Bennet- titeaepollenites, Cycadopites, Taxodiaceaepollenites and Podocarpidites. Thus, the dispersed fossil sporopollen types are in accordance with the parent plants deduced from the dispersed cuticles. Based on the assembling characte- ristics of the deduced parent plants, the climate in the sedimentary period of the Bayanhua Formation was probably warm temperate with seasonal changes.

关 键 词：孢粉 分散角质层 巴彦花组 早白垩世 乌尼特煤田 内蒙古 

分 类 号：Q914[天文地球—古生物学与地层学]