Genesis and Nd Isotope Composition of Ferromanganese Deposits of the Sea of Okhotsk and the Kuril Island Arc

P.E. Mikhailik; I.A. Vishnevskaya; E.V. Mikhailik; M.G. Blokhin; M.V. Chervyakovskaya; V.A. Rashidov; X. Ren

doi:10.2113/RGG20194142

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Research Article| September 01, 2021

Genesis and Nd Isotope Composition of Ferromanganese Deposits of the Sea of Okhotsk and the Kuril Island Arc

P.E. Mikhailik;

P.E. Mikhailik

^a

Far Eastern Geological Institute, Far Eastern Branch of the Russian Academy of Sciences, pr. 100-letiya Vladivostoka 159, Vladivostok, 690022, Russia

^✉

Corresponding author. E-mail address:[email protected] (P.E. Mikhailik)

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I.A. Vishnevskaya;

I.A. Vishnevskaya

^b

Vernadsky Institute of Geochemistry and Analytical Chemistry, Russian Academy of Sciences, ul. Kosygina 19, Moscow, 119991, Russia

^c

Novosibirsk State University, ul. Pirogova 1, Novosibirsk, 630090, Russia

^d

Zavaritsky Institute of Geology and Geochemistry, Ural Branch of the Russian Academy of Sciences, ul. Akademika Vonsovskogo 15, Yekaterinburg, 620016, Russia

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E.V. Mikhailik;

E.V. Mikhailik

^a

Far Eastern Geological Institute, Far Eastern Branch of the Russian Academy of Sciences, pr. 100-letiya Vladivostoka 159, Vladivostok, 690022, Russia

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M.G. Blokhin;

M.G. Blokhin

^a

Far Eastern Geological Institute, Far Eastern Branch of the Russian Academy of Sciences, pr. 100-letiya Vladivostoka 159, Vladivostok, 690022, Russia

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M.V. Chervyakovskaya;

M.V. Chervyakovskaya

^d

Zavaritsky Institute of Geology and Geochemistry, Ural Branch of the Russian Academy of Sciences, ul. Akademika Vonsovskogo 15, Yekaterinburg, 620016, Russia

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V.A. Rashidov;

V.A. Rashidov

^e

Institute of Volcanology and Seismology, Far Eastern Branch of the Russian Academy of Sciences, bulv. Piipa 9, Petropavlovsk-Kamchatsky, 683006, Russia

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X. Ren

^f

First Institute of Oceanography, State Oceanic Administration, 6 Xianxialing Road, Qingdao, 266061, China

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Author and Article Information

P.E. Mikhailik

^a

Far Eastern Geological Institute, Far Eastern Branch of the Russian Academy of Sciences, pr. 100-letiya Vladivostoka 159, Vladivostok, 690022, Russia

I.A. Vishnevskaya

^b

Vernadsky Institute of Geochemistry and Analytical Chemistry, Russian Academy of Sciences, ul. Kosygina 19, Moscow, 119991, Russia

^c

Novosibirsk State University, ul. Pirogova 1, Novosibirsk, 630090, Russia

^d

Zavaritsky Institute of Geology and Geochemistry, Ural Branch of the Russian Academy of Sciences, ul. Akademika Vonsovskogo 15, Yekaterinburg, 620016, Russia

E.V. Mikhailik

^a

Far Eastern Geological Institute, Far Eastern Branch of the Russian Academy of Sciences, pr. 100-letiya Vladivostoka 159, Vladivostok, 690022, Russia

M.G. Blokhin

^a

Far Eastern Geological Institute, Far Eastern Branch of the Russian Academy of Sciences, pr. 100-letiya Vladivostoka 159, Vladivostok, 690022, Russia

M.V. Chervyakovskaya

^d

Zavaritsky Institute of Geology and Geochemistry, Ural Branch of the Russian Academy of Sciences, ul. Akademika Vonsovskogo 15, Yekaterinburg, 620016, Russia

V.A. Rashidov

^e

Institute of Volcanology and Seismology, Far Eastern Branch of the Russian Academy of Sciences, bulv. Piipa 9, Petropavlovsk-Kamchatsky, 683006, Russia

X. Ren

^f

First Institute of Oceanography, State Oceanic Administration, 6 Xianxialing Road, Qingdao, 266061, China

^✉

Corresponding author. E-mail address:[email protected] (P.E. Mikhailik)

Publisher: Novovsibirsk State University

Received: 11 Oct 2019

Accepted: 17 May 2020

First Online: 28 Sep 2021

Online ISSN: 1878-030X

Print ISSN: 1068-7971

Novosibirsk State University

Russ. Geol. Geophys. (2021) 62 (9): 1074–1087.

https://doi.org/10.2113/RGG20194142

Abstract

—The Nd isotope composition of ferromanganese deposits (FMD) from the central part of the Sea of Okhotsk and the Kuril island arc has been studied. The results showed that diagenetic samples from the Deryugin Basin have a heterogeneous Nd isotope composition. The positive ε_Nd values here might be both due to the input of a terrigenous impurity and due to diffuse endogenetic element supply. The FMD samples from the Sonne underwater ridge show a ε_Nd value specific to seawater (–3.2). The ε_Nd value of hydrogenetic FMD from Volcano 7.14 is –3.4, which corresponds to the ε_Nd value of the Pacific water. The FMD samples from Volcano 5.5 are characterized by ε_Nd = –2.0. The higher ε_Nd value might be due to a moderate dilution of the hydrothermal fluid by seawater and might also indicate the presence of volcanic fragments in the FMD samples. The highest ε_Nd value (+4.4) has been established for volcaniclastic sandstone saturated with Fe and Mn hydroxides. It points to a mixing of volcanomictic and hydrothermal materials.

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Genesis and Nd Isotope Composition of Ferromanganese Deposits of the Sea of Okhotsk and the Kuril Island Arc

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Genesis and Nd Isotope Composition of Ferromanganese Deposits of the Sea of Okhotsk and the Kuril Island Arc

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