Siderite layers in the fresh-water Neogene sediments of Vietnam
- Authors: Geptner A.R.1, Petrova V.V.1, Pha P.D.2, Huyen N.X.3, Nginh L.T.3
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Affiliations:
- Geological Institute
- Institute of Marine Geology and Geophysics
- Vietnam Union of Geological Sciences
- Issue: Vol 51, No 2 (2016)
- Pages: 136-151
- Section: Article
- URL: https://journals.rcsi.science/0024-4902/article/view/162416
- DOI: https://doi.org/10.1134/S0024490216020048
- ID: 162416
Cite item
Abstract
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.
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About the authors
A. R. Geptner
Geological Institute
Author for correspondence.
Email: heptner@mail.ru
Russian Federation, Pyzhevskii per. 7, Moscow, 119017
V. V. Petrova
Geological Institute
Email: heptner@mail.ru
Russian Federation, Pyzhevskii per. 7, Moscow, 119017
Phan Dong Pha
Institute of Marine Geology and Geophysics
Email: heptner@mail.ru
Viet Nam, A27 building, 18 Hoang Quoc Viet, Cau Giay, Hanoi
Nguyen Xuan Huyen
Vietnam Union of Geological Sciences
Email: heptner@mail.ru
Viet Nam, 6 Pham Ngu Lao, Hoan Kiem, Hanoi
Le Thi Nginh
Vietnam Union of Geological Sciences
Email: heptner@mail.ru
Viet Nam, 6 Pham Ngu Lao, Hoan Kiem, Hanoi