Nano-scale study of iron oxide/oxyhydroxide in hydrothermal vent microbial mat

Title
Nano-scale study of iron oxide/oxyhydroxide in hydrothermal vent microbial mat
Author(s)
박한범; 양기호; 김종욱; 이진우; 김진욱
KIOST Author(s)
Kim, Jonguk(김종욱)
Publication Year
2018-10-11
Abstract
Hydrothermal vent systems consisting of hydrothermal vent, hydrothermal sediment and microbial mat are widely spread around the ocean, particularly spreading axis, continental margin and back-arc basin. Scientists have perceived that the hydrothermal systems, which reflect the primeval earth environment, are one of the best places to reveal the origin of life and extensive biogeochemical process of microbe-mineral interaction. Red-colored microbial mat recovered by Canadian scientific submersible ROPOS on South Pacific North Fiji basin KIOST hydrothermal vent expedition 1602 contains iron oxides and iron oxyhydroxides. Various morphologies of minerals in the red-colored microbial mat observed by Scanning Electron Microscopy (SEM) are mainly showed sheath shaped, resembled with Leptothrix microbial structure and stalks shaped, similar with Marioprofundus microbial structures. They are also detected with DNA analysis. The cross sectional observation of microbial structures encrusted with iron oxide and iron oxyhydroxide at a nano scale by Focused Ion Beam (FIB) technique, Transmission Electron Microscopy (TEM) and Scanning Transmission Electron Microscopy-spectrum image (STEM-SI) analysis was developed to verify the structural/biogeochemical properties in the microbe-mineral interaction. Systematic nano-scale measurements on the biomineralization in the microbial mat leads the understandings of biogeochemical environme
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/23067
Bibliographic Citation
9th International Conference on Asian Marine Geology, pp.1, 2018
Publisher
ICAMG-9
Type
Conference
Language
English
Publisher
ICAMG-9
Related Researcher
Research Interests

Geochemistry,Submarine hydrothermal system,Deep-sea mineral,지구화학,해저열수시스템,해양광물자원

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