湖北宜昌樟村坪埃迪卡拉系陡山沱组硅磷质结核中的微体化石  

Microfossil Assemblage from Chert Nodules of the Ediacaran Doushantuo Formation in Zhangcunping,Northern Yichang,South China

作　　者：陈寿铭[1] 尹崇玉[1] 刘鹏举[1] 高林志[1] 唐烽[1] 王自强[2] 

机构地区：[1]中国地质科学院地质研究所,北京100037 [2]中国地质大学,北京100083

出　　处：《地质学报》2010年第1期70-77,共8页Acta Geologica Sinica

基　　金：中国地质调查局项目(编号12120100911071;1212010611802-2);科技部基础工作专项(编号2006FY120300-2);中国地质科学院地质研究所中央级公益性基本业务费专项基金(编号J0714)资助成果

摘　　要：本文报道的微体化石产于湖北宜昌樟村坪万家沟剖面埃迪卡拉纪陡山沱组第10层的硅磷质结核中,化石组合包括疑源类Appendisphaera grandis、Ericiasphaera spjeldnaesii、Knollisphaeridium maxi mum、Leiosphaeridia tenuissi ma、Meghystrichosphaeridium perfectum、Tianzhushania polysiphonia、T.spinosa、T.ornata;丝状蓝藻Oscillatoriopsis obtusa、Polytrichoides induviatus、P.lineatus、Salome hubeiensis、Siphonophycustypicum;多细胞藻类Sarcinophycus palilloformis、Wengania minuta。该微体化石组合面貌与黄陵背斜东、南翼陡山沱组二段硅质结核中以大型具刺疑源类Tianzhushania为特征的组合相同,与贵州瓮安地区陡山沱组上磷块岩下部保存的微体化石组合面貌基本一致。The Ediacaran is characterized by diversification of many groups in microfossils record,including filamentous cyanobacteria,multicellular algae and acritarchs.A new microfossils assemblage from the Ediacaran Doushantuo Formation at Zhangcunping,northern Yichang,China,includes filamentous cyanobacteria （Oscillatoriopsis,Polytrichoides,Salome,Siphonophycus）,multicellular algae （Sarcinophycus,Wengania） and acritarchs （Appendisphaera,Ericiasphaera,Knollisphaeridium,Leiosphaeridia,Meghystrichosphaeridium and Tianzhushania）.Acritrachs are found at the first time in the chert nodules in this region.The new microfossil assemblage is similar to that from the member Ⅱ of the Doushantuo Formation in the East Yangtze Gorges area and the upper phosphorites in Weng＇an,central Guizhou.

关 键 词：宜昌 埃迪卡拉系 陡山沱组 微体化石 

分 类 号：Q913[天文地球—古生物学与地层学]