REY distribution of phosphatized ferromanganese crusts : LA-ICP-MS Analyses

Title
REY distribution of phosphatized ferromanganese crusts : LA-ICP-MS Analyses
Author(s)
최지수; 박병권; 김종욱; 이인성
KIOST Author(s)
Kim, Jonguk(김종욱)
Publication Year
2015-10-29
Abstract
Ferromanganese crusts, iron manganese oxyhydroxides precipitated on seamounts, havedifferent REY distribution and pattern between layers of ferromanganese crusts. Phosphatizationis one of reason that makes the REY differences on ferromanganese crusts. Phosphatizedferromanganese crusts are composed of Fe-bearing vernadite and carbonate fluorapatite(CFA) with minor todorokite. REY concentrations in the phases of phosphatized ferromanganesecrusts were analyzed by LA-ICP-MS. EPMA Ca data were used as known concentrationfor LA-ICP-MS data reduction. Four different phases were targeted: vernadite with todorokite,vernadite with CFA, low-Fe Mn oxide (todorokite), and vernadite in diagenetic structures.Vernadite with todorokite and low-Fe Mn oxide phases were depleted in REY with strong Cepositive anomaly. Their REY pattern is similar to those of the bulk non-phosphatized crusts.REY pattern of vernadite with CFA is analogous to those of the bulk phosphatized crusts.Otherwise, vernadite in diagenetic structures has the highest REY concentrations with negativeCe anomaly that is anomalous for the REY patterns of hydrogenetic ferromanganesecrusts.nganese crusts. Phosphatizedferromanganese crusts are composed of Fe-bearing vernadite and carbonate fluorapatite(CFA) with minor todorokite. REY concentrations in the phases of phosphatized ferromanganesecrusts were analyzed by LA-ICP-MS. EPMA Ca data were used as known concentrationfor LA-ICP-MS data reduction. Four different phases were targeted: vernadite with todorokite,vernadite with CFA, low-Fe Mn oxide (todorokite), and vernadite in diagenetic structures.Vernadite with todorokite and low-Fe Mn oxide phases were depleted in REY with strong Cepositive anomaly. Their REY pattern is similar to those of the bulk non-phosphatized crusts.REY pattern of vernadite with CFA is analogous to those of the bulk phosphatized crusts.Otherwise, vernadite in diagenetic structures has the highest REY concentrations with negativeCe anomaly that is anomalous for the REY patterns of hydrogenetic ferromanganesecrusts.
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/25209
Bibliographic Citation
2015 추계지질과학연합학술대회, pp.187, 2015
Publisher
대한지질학회
Type
Conference
Language
English
Publisher
대한지질학회
Related Researcher
Research Interests

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

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