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作者单位:A. R. Geptner (1) V. V. Petrova (1) Phan Dong Pha (2) Nguyen Xuan Huyen (3) Le Thi Nginh (3)
1. Geological Institute, Russian Academy of Sciences, Pyzhevskii per. 7, Moscow, 119017, Russia 2. Institute of Marine Geology and Geophysics, VAST, A27 building, 18 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam 3. Vietnam Union of Geological Sciences, 6 Pham Ngu Lao, Hoan Kiem, Hanoi, Vietnam
刊物类别:Earth and Environmental Science
刊物主题:Earth sciences Mineral Resources Mineralogy Sedimentology Russian Library of Science
出版者:MAIK Nauka/Interperiodica distributed exclusively by Springer Science+Business Media LLC.
ISSN:1608-3229
文摘
Siderites forming beds and lenses in the Neogene lacustrine—swampy sediments of the Rinh Chua Formation (northern Vietnam) are considered in detail. Results of the mineralogical and chemical study of siderites and host terrigenous–clayey siltstones are reported. New analytical data characterize the composition and structure of microbiomorphic (bacterial) bodies in the siderites and terrigenous sediments. Microstructures (porosity) and compositional peculiarities (up to 18% P2O5) of individual horizons of the sediments testify to their lacustrine-swampy genesis. It is established that the siderites in association with the layer silicates were formed during the microbiochemogenic decomposition of terrigenous components, including quartz.