THE REE SPECIES AND THEIR DISTRIBUTION IN FERROMANGANESE CRUSTS IN THE SEA OF JAPAN
N.V. Astakhova and V.V. Sattarova
V.I. Il'ichev Pacific Oceanological Institute, Far Eastern Branch of the Russian Academy of Sciences, ul. Baltiiskaya 43, Vladivostok, 690041, Russia
Keywords: REE, ferromanganese crusts, Sea of Japan
Pages: 649-656
Abstract
Polished sections of ferromanganese crusts on underwater rises in the Sea of Japan were studied on a JXA8100 electron microprobe. Mineral phases of REE have been detected. They have a Ln2O3 chemical composition, where Ln is La-Ce-Pr-Nd, La-Ce-Nd, or, much more seldom, La-Ce and La-Ce-Pr. With regard to the same chemical composition of REE grains in the ore crusts and basalts from Medvedev Volcano, it has been concluded that these REE were supplied during postvolcanic gas-hydrothermal processes.
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