我国寒武系底部几种磷酸盐化保存的蓝菌类化石  

SOME PHOSPHATIZED CYANOBACTERIAN FOSSILS FROM THE BASAL CAMBRIAN OF CHINA

作　　者：钱逸[1] 李国祥[1] 蒋志文 陈孟莪[3] 杨爱华[4] 

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,南京210008 [2]云南省地质学会,昆明650011 [3]中国科学院地质与地球物理研究所,北京100029 [4]南京大学地球科学系,南京210093

出　　处：《微体古生物学报》2007年第2期222-228,共7页Acta Micropalaeontologica Sinica

基　　金：中国科学院创新项目(KZCX03-SW-141);国家自然科学基金项目(40572006);科技部基础研究发展规划项目(2006CB806401);云南大学云南省古生物研究重点实验室开放基金项目资助。

摘　　要：本文系统描述了产于我国寒武系底部磷矿层中的微型蓝菌类化石4属4种,其中Girvanella sp.和Spirellus columnaris产于新疆阿克苏、乌什玉尔吐斯组和云南会泽、安宁朱家箐组中谊村段,Endoconchia lata产于四川峨眉灯影组麦地坪段,Cambricodium capilloides和一块属种名未定的化石产于陕西宁强灯影组宽川铺段,从而丰富了我国寒武系底部磷块岩层中的蓝菌类化石。本文还讨论了上述微型蓝菌类化石有直接磷酸盐化保存和钻孔磷酸盐铸模保存的两种保存方式。This paper describes systematically 4 genera and 4 species of cyanobacterian microfossils collected from the basal Cambrian phosphoric strata of China. Among them, Girvanella sp. and Spirellus columnaris were collected respectively from the Yuertus Formation of Wushi and Akesu, Xinjiang Province, and the Zhongyicun Member of Huize and Anning counties of Yunnan Province, Endoconchia lata from the Maidiping Member of Emei, Sichuan. Cambricodium capilloides and an indeterminate specimen were found from the Kuanchuanpu Member of Ningqiang County, Shaanxi Province. Two kinds of fossil preservation are discussed herein： 1） the cyanobacterian filaments were directly phosphatized during early diagenesis, 2） endolithic filaments were morphologically preserved through phosphate infillings of the boring tunnels.

关 键 词：蓝菌 寒武系底部 磷酸盐化 中国 

分 类 号：Q913[天文地球—古生物学与地层学]