Composition and distribution of REE in ferromanganese crusts of the Belyaevsky and Medvedev seamounts in the Sea of Japan |
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| Authors: | P E Mikhailik E V Mikhailik N V Zarubina N N Barinov V T S’edin E P Lelikov |
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| Institution: | 1. Far East Geological Institute, Far East Branch, Russian Academy of Sciences, pr. Stoletiya Vladivostoka 159, Vladivostok, 690022, Russia
2. Il’ichev Pacific Oceanological Institute, Far East Branch, Russian Academy of Sciences, ul. Baltiiskaya 43, Vladivostok, 690041, Russia
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| Abstract: | This paper presents the results of the integrated study of ferromanganese crusts from the Belyaevsky (Central Basin) and Medvedev (Honshu Basin) seamounts from the Sea of Japan. The study of the mineral composition using powder diffraction and optical and electron microscopy showed that the crusts are made up of todorokite, birnessite, and pyrolusite minerals typical of hydrothermal ferromanganese deposits of the World Ocean. The composition of the ferromanganese crusts from the Sea of Japan was determined by ICP-MS and ICP-OES. The contents of Mn, Fe, Co, Cu, Ni, and other major and trace elements indicate the hydrothermal genesis of the crusts. The obtained data on the composition of ferromanganese crusts of the Sea of Japan, as well as their comparison with different types of deposits of the World Ocean, suggest the endogenic genesis of the studied crusts. However, the REE and Y distribution patterns testify to a significant admixture of hydrogenic matter, which participated in the growth of ferromanganese crusts from the Belyaevsky and Medvedev seamounts. |
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