湖北峡东地区埃迪卡拉系陡山沱组微体化石的新材料  

New data of microfossils from the Ediacaran Doushantuo Formation in the East Yangtze Gorges area, Hubei Province, South China

作　　者：曾雄伟[1] 陈孝红[1] 李志宏[1] 周鹏[1] 张保民[1] 彭中勤[1] 

机构地区：[1]中国地质调查局武汉地质调查中心,武汉430205

出　　处：《华南地质与矿产》2013年第3期192-198,共7页Geology and Mineral Resources of South China

基　　金：中国地质调查局项目(NO.1212010710715;NO.1212011121103)资助

摘　　要：通过对牛坪剖面和新测的晓峰河剖面燧石结核和条带的切片研究,进一步证实峡东地区陡山沱组下部和上部分别含有不同的微体化石组合。下组合以大型具刺疑源类Tianzhushania为主,包括疑源类Appendisphaera magnifica、Leiosphaeridia tenuissima、Meghystrichosphaeridium chadianensis、Tanarium sp.、Tianzhushania fissura、T.spinosa、T.sp.、Unnamed A;丝状蓝藻Oscillatoriopsis longa、Polytrichoides induviatus、Salome hubeiensis、Siphonophycus kestron、S.robustum;多细胞藻类Sarcinophycus palilloformis、Unnamed multicelluar alga A。上组合以出现大量个体介于50～140μm的呈聚集保存的球状膜壳为特征,包括疑源类Leiosphaeridia tenuissima、Knollisphaeridium maximum、K.sp.、Meghystrichosphaeridium perfectum及Unnamed B、C。本文的两个微体化石组合与Yin等(2011)和Liu等(2013)的组合特征基本一致。Based on hundreds of thin sections from Niuping and new measured Xiaofenghe sections, we further confirmed that two different microfossil assemblages can be recognized separately in the lower and upper Doushantuo Formation. The lower assemblage which is characterized by the large acanthomorphic acritarch Tianzhushania, includes acritarchs （Appendisphaera magnifica, Leiosphaeridia tenuissima, Meghystrichos-phaeridium chadianensis, Tanarium sp., Tianzhushania fissura, T. spinosa, T. sp., Unnamed A）, filamentous cyanobacteria （Oscillatoriopsis longa, Polytrichoides induviatus, Salome hubeiensis, Siphonophycus kestron, S. robustum） and muhicelluar algae （Sarcinophycus palilloformis, Unnamed muhicelluar alga A）. The upper assem- blage characterized by the occurrence of abundant spherical colonies （with individual sphere 50-140 μ m in size）, consists of acritarchs （Leiosphaeridia tenuissima, Knollisphaeridium maximum, K. sp., Meghystrichos-phaeridium perfectum, Unnamed C）, and cyanobacteria fragments. Our data are consistent with previous reports by Yin et al. （A cta Geologica Sinica,2011,85：283-295） and Liu et al. （Precambrian Research,2013,225：29-43）.

关 键 词：陡山沱组 微体化石 埃迪卡拉系 峡东地区 

分 类 号：P52[天文地球—古生物学与地层学]