Ferromanganese Crusts of the Peter the Great Seamount and the Vasilkovsky Ridge (Sea of Japan)

The structure and chemical composition of ferromanganese crusts formed on the sedimentary cover of the underwater volcanoes of the Peter the Great Seamount and the Vasilkovsky Ridge, located near the continental slope of Primorye (Sea of Japan), are studied. The crusts were formed as a result of cem...

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Published inRussian journal of Pacific geology Vol. 17; no. Suppl 2; pp. S144 - S153
Main Author Astakhova, N. V.
Format Journal Article
LanguageEnglish
Published Moscow Pleiades Publishing 01.12.2023
Springer Nature B.V
Subjects
Aluminium
Aluminum
Basalt
Cementation
Concretions
Continental slope
Earth and Environmental Science
Earth Sciences
Geology
High temperature
Holocene
Hydrothermal solutions
Hydroxides
Manganese
Metals
Pleistocene
Rare earth elements
Seamounts
Volcanoes
Sea of Japan
Peter the Great Seamount
Vasilkovsky Ridge
ferromanganese crusts
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Summary:The structure and chemical composition of ferromanganese crusts formed on the sedimentary cover of the underwater volcanoes of the Peter the Great Seamount and the Vasilkovsky Ridge, located near the continental slope of Primorye (Sea of Japan), are studied. The crusts were formed as a result of cementation and precipitation of manganese hydroxides on the sediment surface. The signs of the hydrothermal nature of these formations are very high titanium and low aluminum modules, low contents of nonferrous and rare-earth elements (REEs), and an excess of heavy REE contents over the light ones. An ore substance was probably deposited in the Pleistocene–Holocene from postvolcanic hydrothermal solutions. Unlike the crusts deposited on basalts in the central parts of the Sea of Japan, these crusts do not contain inclusions of fine grains of medium- and high-temperature mineral phases of nonferrous metals.
ISSN:1819-7140
1819-7159
DOI:10.1134/S181971402308002X