Advances in Earth Science ›› 2014, Vol. 29 ›› Issue (4): 456-463. doi: 10.11867/j.issn.1001-8166.2014.04.0456

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Microfossil Assemblage and Its Sedimentary Environment in Cambrian Stromatolites, Western He’nan

Chang Yuguang, Bai Wanbei, Qi Yongan, Sun Fengyu, Wang Min   

  1. Institute of Resources & Environment, Key Laboratory of Biogenic Traces &Sedimentary Minerals of He’nan Province, He’nan Polytechnic University, Jiaozuo 454000, China
  • Received:2014-01-07 Online:2014-04-10 Published:2014-04-10

Chang Yuguang, Bai Wanbei, Qi Yongan, Sun Fengyu, Wang Min. Microfossil Assemblage and Its Sedimentary Environment in Cambrian Stromatolites, Western He’nan[J]. Advances in Earth Science, 2014, 29(4): 456-463.

Biogenic stromatolites is one of the focus of geologists for a long time. In this paper, the research object is Cambrian stromatolites of western He’nan. Abundant microbial fossils are discovered in Cambrian carbonate stromatolites of western Henan, which are Girvanella and Renalcis of cyanobacteria with filamentous and spherical features, by means of polarizing microscope and Scanning Electron Microscopy (SEM). They display the distinct characteristics of assemblage, such as the sheet or mat assemblage, the globular assemblage, the cellular and the grid assemblage. Study shows that there exists very close ties between the distribution of microbial fossils and microfossils assemblage and the macroscopic forms and their layers. The sedimentary environmental models of microbial fossils and 4 categories and 10 types of microfossils assemblage have been established. The growth environment, especially the hydrodynamic condition of stromatolites is one of the important effect factors of the microfossils assemblage preservation and distribution.

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