Magmatism of the submarine Vityaz Ridge (Pacific slope of the Kuril Island Arc) |
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Authors: | E P Lelikov T A Emel’yanova B V Baranov |
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Institution: | (1) Il’ichev Pacific Oceanological Institute, Far East Division, Russian Academy of Sciences, Vladivostok, Russia;(2) Shirshov Institute of Oceanology, Russian Academy of Sciences, Moscow, Russia |
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Abstract: | Original results of igneous rock studies are presented. The rocks were dredged during a marine expedition (cruise 37 of R/V Akademik M.A. Lavrent’ev in August–September, 2005) in the region of the submarine Vityaz Ridge and Kuril Arc outer slope. Several age complexes (Late Cretaceous, Eocene, Late Oligocene, Miocene, and Pliocene-Pleistocene) are recognizable on the Vityaz Ridge. These complexes are characterized by a number of common geochemical features since all of them represent the formations of island arc calc-alkali series. At the same time, they also have individual features reflecting different geodynamic settings. The outer slope of the Kuril Arc demonstrates submarine volcanism. The Pliocene-Pleistocene volcanic rocks dredged here are similar to the volcanites of the Kuril-Kamchatka Arc frontal zone. |
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