新疆巴楚晚奥陶世礁丘中的蓝菌群落

CYANOBACTERIAL COMMUNITY FROM THE REEF MOUND OF THE LIANGLITAG FORMATION(UPPER ORDOVICIAN),BACHU,XINJIANG,NW CHINA

新疆巴楚上奥陶统良里塔格组"中红灰岩"中见蓝菌-绿藻形成的礁丘,常见3类蓝菌类化石:Girvanella,Renalcid和Ortonella,其中Renalcid包括Renalcis和Izhella。蓝菌群落所形成的微生物岩构造包括钙化的微生物膜和微生物席、叠层石和凝块石,对礁灰岩的建造作用主要体现在作为灰泥物源、粘结颗粒和形成格架。

Reef mound community of the Upper Ordovician Lianglitag Formation at Bachu, Xinjiang is dominated by microbial-green algel. Three types of microbes are referred to Girvanella, Renalcid and Ortonella, and Renalcid includes two genera of Renalcis and Izhella. Microbial carbonates include calcified biofilms and calci microbial mats, stromatolites, and thrombolites. The reef-building function of microbial communities is interpreted to be the source of lime mud, bonds of clasts and builders of reef framework, respectively.