The Sinian microfossils from Jinning, Yunnan, south west China
The Sinian microfossils from Jinning, Yunnan, south west China
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DOI：
10.1016/0301-9268(83)90033-5
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发表时间：
1983-12
影响因子：
3.8
通讯作者：
Wang Fuxing;Z. Xuanyang;Gu Ruihuan
中科院分区：
文献类型：
--
作者：
Wang Fuxing;Z. Xuanyang;Gu Ruihuan
在云南晋宁震旦系灯影组和梅树村组（610 Ma）的硅质岩中发现了一个微体化石组合，以胶磷矿或磷灰石的独特保存类型（模式），甚至在罕见的情况下，首次报道了硅质岩交代作用，其粒度频率统计与Schopf的结果一致。该组合包括18属20种，其中4属10新种。该组合由单生和集群的球状细胞和有隔膜或无隔膜的丝状体组成，主要为蓝藻门，特别是色球藻科、颤藻科和念珠藻科，所描述的微体化石为Bigeminococcus grandisn.例如，金氏粘球菌、大粘球菌、普通古囊菌、Venustusn.g.古藻et sp.，粗壮拟始菌（Eomycetopsis robusta）、金宁圆线藻（Circulinema jinningensen. g.）et sp.，穆氏圆线藻et sp.，膨胀蓝丝藻、小奥氏藻、奥氏拟颤藻。例如，古林丝藻。例如，螺旋古林藻例如，古管藻et sp.，退伍军人属1、退伍军人属（Veteronostocalesp.）2、隔全翅蚤Allantomorphus septatusn.g. et sp.，新栅藻例如，扭生枝藻、古流丝藻、刚毛微囊藻和致密原球壳藻。
A microfossil assemblage has been detected in phosphorite cherts from the Dengying and Meishucun Formations (610 Ma) of the Sinian System in Jinning County, Yunnan Province, southwest China.A unique type (mode) of microfossil preservation — collophanite or apatite, or even in rare cases, chert-replacement — is reported here for the first time.The size frequency statistics for the assemblage are consistent with the results obtained by Schopf. The assemblage includes 18 genera and 20 species, among which 4 genera and 10 species are new. The assemblage consists of solitary and colonial spheroidal cells and septate or non-septate filaments, mainly Cyanophyta, especially Chroococaceae, Oscillatoriaceae and Nostocaceae.The microfossils described areBigeminococcus grandisn. sp.,Myxococcoides kingii, Myxococcoides grandis, Palaeoanacystis vulgaris, Archaeophycus venustusn.g. et sp.,Eomycetopsis robusta, Circulinema jinningensen.g. et sp.,Circulinema muiraen.g. et sp.,Cyanonema infliatum, Obruchevella parva, Oscillatoriopsis awramikiin. sp.,Palaeolyngbya oehleriin. sp.,Palaeolyngbya spiralisn. sp.,Palaeotubulus lamellosusn.g. et sp.,Veteronostocalesp. 1,Veteronostocalesp. 2,Allantomorphus septatusn.g. et sp.,Clonophycus vacusn. sp.,Archaeotrichion contortum, Rhienonema antiquum, Micrhystridium setulerumandProtosphaeridium densum.