华南埃迪卡拉(震旦)系陡山沱组生物地层学研究的新进展  

New Advances in the Study of Biostratigraphy of the Sinian(Ediacaran) Doushantuo Formation in South China

作　　者：尹崇玉[1,2] 唐烽[1,2] 刘鹏举[1,2] 高林志[1,2] 王自强[3] 陈寿铭[1,2] 

机构地区：[1]中国地质科学院地质研究所,北京100037 [2]中国地质科学院地层学及古生物学重点实验室,北京100037 [3]中国地质大学地球科学与资源学院,北京100083

出　　处：《地球学报》2009年第4期421-432,F0004,共13页Acta Geoscientica Sinica

基　　金：科技部基础工作专项(2006FY120300);中国地质调查局项目(1212010611802-2);国家自然科学基金项目(40672022)共同资助

摘　　要：本文重点介绍华南地区埃迪卡拉(震旦)系陡山沱组生物地层学研究的新进展:(1)贵州江口陡山沱组上部黑色页岩中发现保存完美的八辐射螺旋结构的埃迪卡拉型动物化石——八臂仙母虫,首次确立陡山沱组上部庙河生物群层位有埃迪卡拉型动物化石的存在,为该层位与澳大利亚典型埃迪卡拉动物群层位对比提供了重要证据。(2)陡山沱组第二段首次发现有饰天柱山藻,确立了陡山沱组中下部出现的以Tianzhushania属为特征的具刺疑源类下组合带,为同期地层的对比提供了新依据。(3)在峡东地区陡山沱组第三段发现以Tanarium属为特征的具刺疑源类上组合带,它们与断面呈圆形和方形的管状化石共生,层位稳定,分布广泛。这些新古生物的发现,不仅进一步完善了我国埃迪卡拉(震旦)系陡山沱组的生物地层序列,而且为解决全球埃迪卡拉系划分和对比提供了可靠的古生物依据。This paper describes in brief new advances in the study of biostratigraphy of the Ediacaran （Sinian） Doushantuo Formation in South China： （1） the well-preserved eight-armed, diated, Ediacara body fossil--Eoandromeda octobrachiata--was found in the black shale within the upper part of the Doushantuo Formation in Wenghui, Jiangkou County, Guizhou Province, South China. This discovery confirms for the first time the existence of the Ediacara body fossil in the Miaohe biota of the Doushantuo Formation and thus provides important evidence for the correlation between the fossiliferous positions and typical Ediacaran strata in Australia; （2） Tianzhushania ornata was first found in the 2nd Member of the Doushantuo Formation. This further confirms the presence of a lower acritarch assemblage dominated by Tianzhushania and other diverse acanthomorphic morphs in the 2nd Member and provides new evidence for correlation of these contemporaneous strata; （3） the upper acanthomorphic acritarch assemblage dominated by Tanarium was found in the 3rd Member of the Doushantuo Formation, which is associated with tubular microfossils with a circular and square cross-sections, and whose distribution is quite stable and widespread. The discovery of these paleontological data has not only further perfected the biostratigraphical sequence of the Ediacaran Doushantuo Formation in China but also provided the paleon- tological evidence for the subdivision and correlation of the Ediacaran System in the world.

关 键 词：华南 埃迪卡拉系 陡山沱组 生物地层学 

分 类 号：Q914.82[天文地球—古生物学与地层学] P913.85[生物学—古生物学]