渤海海域渤东凹陷沙河街组四段古生物组合的发现及其意义  

THE PALAEONTOLOGICAL ASSEMBLAGE FROM THE ES4 OF THE BODONG DEPRESSION IN THE BOHAI SEA AND ITS SIGNIFICANCE

作　　者：刘长海[1] 魏文艳[1] 任志勇[1] 王勇[1] 曲日涛[1] 杨纪磊[1] 齐玉民[1] 

机构地区：[1]中海油能源发展股份有限公司钻采工程研究院渤海实验中心,天津塘沽300452

出　　处：《微体古生物学报》2011年第3期316-323,共8页Acta Micropalaeontologica Sinica

摘　　要：渤海海域渤东凹陷沙河街组四段内发现了丰富的孢粉、藻类和轮藻类化石组合,孢粉组合与渤海湾沿岸地区沙河街组四段的Ephedripites-Ul moideipites tricostatus-Pterisisporites组合特征一致,沟鞭藻类见有Luxadini-umelongatum,Cangxianellaelongata,Alterbidinium?sp.,Subtilisphaerasp.等典型的沙四段分子,并在渤海地区首次发现了Luxadiniumdongmingense,Morkallacysta paradoxum,M.huanghuaense,Palaeoperidiniumrugosum等种,轮藻则连续见到渤海沿岸地区沙四段典型化石Gyrogona qianjiangicao。该古生物组合的发现为该地区沙四段地层的确定提供了可靠的古生物资料,为今后地层的划分与对比提供了依据。Abundant fossils of spores and pollen,phycophyta,Charophyta are discoveried from the Es4 of the Bodong Depression in the Bohai Basin in present study.The characteristics of sporopollen are in accordance with the Ephedripites-Ulmoideipitestricostatus-Pterisisporites assemblages of Es4 in coastal region of the Bohai Sea.The representative Es4 dinoflagellate fossils are also found,such as Luxadinium elongatum,Cangxianella elongata,Alterbidinium？ sp.and Subtilisphaera sp.Gyrogona qianjiangica are also found as a representative Es4 Charophyta fossil.The discovery of these fossils provides a reliable basis for stratigraphic definition and subdivision and correlation of Es4 strata.

关 键 词：沟鞭藻类 孢粉 轮藻 沙河街组四段 渤东凹陷 渤海 

分 类 号：P618.13[天文地球—矿床学]