典型文献
Giant ooids of microbial origin from the Zhangxia Formation(Cambrian Miaolingian Series)in North China
文献摘要：
The role of microorganisms in the formation of giant ooids is one of the areas of long-term controversy in ooidal research,but it has not been confirmed conclusively.Abundant giant ooids developed in the Zhangxia Formation of the Cambrian Miaolingian Series in North China.Giant ooids in the study area were examined by using Polarized Light Microscopy and Field Emission Environmental Scanning Electron Mi-croscopy.The nuclei of the ooids consist of micritic pellets or radial ooids with diameters less than 2 mm and are formed in a weak-agitating seawater environment.Their cortices are concentric,and are characterized by the alternations of the dark laminae of micritic calcite or Girvanella filaments and light laminae of microsparry calcite.In the environments of inter-bank sea with the alternating development of medium and low energy and chiefly weak-agitating conditions,giant ooids were formed under the joint action of Girvanella fila-mentous growth,biologically-induced calcification and/or biologically-influenced calcification and inorganic calcium carbonate precipitation.The microfossils of Girvanella are distributed in inner and outer cortices of giant ooids,especially dense in the latter.This distinctly indicates that microbes play a significant role in the formation of giant ooids,and also provides a vital example for discussing the microbial origin of giant ooids.
文献关键词：
中图分类号：
作者姓名：
Ming-Yue Dai;Hua-Shan Zhang;Wei Zheng;Yong-An Qi;Zhi-Feng Xing;Zhen Zhang
作者机构：
School of Resources and Environment,Henan Polytechnic University,Jiaozuo 454003,Henan Province,China;Key Laboratory of Biogenic Traces and Sedimentary Minerals of Henan Province,Henan Polytechnic University,Jiaozuo 454003,Henan Province,China
文献出处：
引用格式：
[1]Ming-Yue Dai;Hua-Shan Zhang;Wei Zheng;Yong-An Qi;Zhi-Feng Xing;Zhen Zhang-.Giant ooids of microbial origin from the Zhangxia Formation(Cambrian Miaolingian Series)in North China)[J].古地理学报（英文版）,2022(01):52-68
A类：
ooids,Zhangxia,Miaolingian,ooidal,micritic,agitating,Girvanella,microsparry,fila,mentous
B类：
Giant,microbial,origin,from,Formation,Cambrian,Series,North,China,role,microorganisms,formation,giant,one,areas,long,term,controversy,research,has,not,been,confirmed,conclusively,Abundant,developed,study,were,examined,by,using,Polarized,Light,Microscopy,Field,Emission,Environmental,Scanning,Electron,nuclei,consist,pellets,radial,diameters,less,than,formed,weak,seawater,Their,cortices,concentric,characterized,alternations,dark,laminae,calcite,filaments,light,In,environments,inter,bank,alternating,development,medium,low,energy,chiefly,conditions,under,joint,action,growth,biologically,induced,calcification,influenced,inorganic,calcium,carbonate,precipitation,microfossils,distributed,inner,outer,especially,dense,latter,This,distinctly,indicates,that,microbes,play,significant,also,provides,vital,example,discussing
AB值：
0.480495
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