Geochemical zoning in ferromanganese crusts of Ita-MaiTai guyot

Samples of ferromanganese crusts dredged from Ita-MaiTai guyot (Magellan seamounts, Pacific Ocean) were studied. They are made up of a complete stratigraphic section of different-age layers, including unique oldest relict layers in some samples. The study of trace, rare-earth, and noble element (inc...

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Published inGeochemistry international Vol. 48; no. 5; pp. 423 - 445
Main Authors Asavin, A. M., Kubrakova, I. V., Mel’nikov, M. E., Tyutyunnik, O. A., Chesalova, E. I.
Format Journal Article
LanguageEnglish
Published Dordrecht SP MAIK Nauka/Interperiodica 01.05.2010
Springer Nature B.V
Subjects
Earth and Environmental Science
Earth Sciences
Ferroelectrics
Geochemistry
Manganese compounds
Paleogene
Pleistocene
Seamounts
Trace elements
Geochemical Zoning
Trace Element Composition
Ferromanganese Nodule
Geochemistry International
Phosphorite
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Summary:Samples of ferromanganese crusts dredged from Ita-MaiTai guyot (Magellan seamounts, Pacific Ocean) were studied. They are made up of a complete stratigraphic section of different-age layers, including unique oldest relict layers in some samples. The study of trace, rare-earth, and noble element (including Pt and Pd) distribution showed that old layers differ from young ones in terms of Co, TR, S, As, and P. In addition, composition of the crusts significantly varies depending on the spatial position of sample in the guyot. In some zones, crusts enriched in trace elements were generated both in the Pleistocene and Paleogene. Significant variations established in trace element composition of different-age layers indicate that trace element composition of the crusts notably evolved with time, which could be caused by productivity of biocenosis or change in the formation depth of crusts on the guyot due to vertical tectonic movements.
ISSN:0016-7029
1556-1968
DOI:10.1134/S0016702910050010