湖北宜昌樟村坪陡山沱组微体化石新资料  

NEW DATA OF MICROFOSSILS FROM DOUSHANTUO FORMATION AT ZHANGCUNPING IN YICHANG, HUBEI PROVINCE

作　　者：周传明[1] 解古巍[1] 肖书海 

机构地区：[1]现代古生物学和地层学国家重点实验室,中国科学院南京地质古生物研究所 [2]Department of Geosciences,Virginia Polytechnic Institute and State University,Blacksburg,VA24061,USA

出　　处：《微体古生物学报》2005年第3期217-224,共8页Acta Micropalaeontologica Sinica

基　　金：国家自然科学基金(40372006);国家重点基础研究发展规划项目(G2000077700);科技部国际科技合作重点项目(2003CB716805)的支持。

摘　　要：湖北宜昌樟村坪磷矿陡山沱组化石组合主要包括球状蓝菌Archaeophycus venustus,丝状蓝菌Siphono-phycus,Oscillatoriopsis,Polytrichoides和Salome hubeiensis,以及多细胞藻类化石Wengania和可能的Sarcino-phycus。化石主要产于陡山沱组上部白云岩的硅磷质条带和结核中。樟村坪磷矿陡山沱组化石组合的发现进一步表明华南扬子地区陡山沱组燧石相具有和磷块岩相中类似的化石组合。Present study reveals that abundant coccoidal fossils （e. g. , Archaeophycus venustus） and filamentous cyanobacteria （e. g., Siphonophycus, Oscillatoriopsis, Polytrichoides and Salome hubeiensis） occur throughout the Doushantuo Formation except the lower cap dolostone. Multicellular algae Sarcinophycus and Wengania only appear in the phosphatic cherty nodules within dolostone succession （bed 6） above the phosphorite bed. Large acanthomorphic acritarchs, however, have not been found at Zhangcunping so far. Wengania specimens from Doushantuo Formation at Zhangcunping are generally less than 100/μm in diameter and appear to be smaller than Wengania populations from Weng＇an, Baokang, and Chadian, but comparable in size to Wengania minuta recently discovered from the upper Doushantuo Formation in the Yangtze Gorges area.

关 键 词：多细胞藻类 新元古代 陡山沱组 樟村坪磷矿 湖北 微体化石 湖北宜昌 新资料 化石组合 藻类化石 

分 类 号：Q913.2[天文地球—古生物学与地层学]