Surface Microstructures of the Microbialite around Permo-Triassic Boundary, <?xml:namespace prefix = st1 ns = "urn:schemas-microsoft-com:office:smarttags" /><st1:place w:st="on">NE Sichuan</st1:place> Province, China<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p>

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Surface Microstructures of the Microbialite around Permo-Triassic Boundary, NE Sichuan Province, China

详细信息

责任者：Liu Xinchun (Nanjing Institute of Geology and Palaeontology ; Chinese Academy of Sciences ; Nanjing 210008 ; China) ; Chen Xiaozheng
刊名：Acta Palaeontologica Sinica
出版年：2010
卷期：49(2)
关键词：石灰岩 ; limestone ; 白云岩 ; dolostone ; 微生物 ; microorganisms ; 四川 ; Sichuan Province
页码：p.261-268
图表：3 illus., 2 tables, 25 refs.
分类号：0803
issnNo：ISSN0001-6616
isbnNo：CN32-1188/Q

摘要

A variety of chemical methods were employed to analyze microbialite of the Hongyudong section in Tongjiang, Sichuan Province. 2.5% HCl, 10% HCl, 10% NaOH, 20% H₂O₂,10% HAc and 0.1 M EDTA were used to etch the surface of microbialite samples. According to the results of the experiment and SEM, the best chemical condition was selected. Some microbial and metazoan fossils were found on the surface of microbialite after chemical treatment. The differences of surface features between microbialite and general dolomite were compared, and the nano-sized spheroids in microbialite were possibly the traces of sulphate-reducing bacteria activity. An anaerobic environment caused by sulphate-reducing bacteria is suggested as a possible clue to the end-Permian mass extinction.