Sedimentary Significance of the Autochthonous Glauconite in Stromatolitic Limestones of the Mesoproterozoic Tieling Formation in Jixian, <?xml:namespace prefix = st1 ns = "urn:schemas-microsoft-com:office:smarttags" /><st1:City w:st="on">Tianjin</st1:City>, <st1:place w:st="on">North China</st1:place> <?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p>

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Sedimentary Significance of the Autochthonous Glauconite in Stromatolitic Limestones of the Mesoproterozoic Tieling Formation in Jixian, Tianjin, North China

详细信息

责任者：Zhou Xiqiang (School of Earth Sciences and Resources ; China University of Geosciences ; Beijing 100083 ; China) ; Li Nan
刊名：Geological Bulletin of China
出版年：2009
卷期：28(7)
关键词：海绿石 ; glauconite ; 叠层石 ; stromatolites ; 石灰岩 ; limestone ; 天津 ; Tianjin
页码：p.985-990
图表：4 illus., 1 table, 39 refs.
分类号：0803
issnNo：ISSN1671-2552
isbnNo：CN11-4648/P

摘要

Glauconites are widespread in the stromatolite limestones of the upper part of the Mesoproterozoic Tieling Formation in Jixian, Tianjin, North China. Field investigation shows that glauconites are mainly distributed in the micritic limestone between stromatolite columns as thin film centering on the outer edge of stromatolite sheath. Microscopically, they commonly occur as irregular colloids which are indicative of autochthonous typical feature. The EPMA data indicates they are moderately matured in nature. The fact that the glauconites occur in stromatolite limestone deposited in the high-energy subtidal environment suggests that they were not necessarily formed on the substrate with a low sedimentation rate or even a sedimentation hiatus, this is quite different from the case of modern glauconites.