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

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

Переведенное название: Генезис и изотопный состав Nd железомарганцевых образований Охотского моря и Курильской островной дуги

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

Кафедра минералогии и геохимии ГГФ

Результат исследования: Научные публикации в периодических изданиях › статья › рецензирование

Аннотация

Проведены исследования изотопного состава неодима железомарганцевых образований (ЖМО) центральной части Охотского моря и Курильской островной дуги. Результаты показали неоднородность изотопного состава Nd образцов диагенетических ЖМО в котловине Дерюгина. Положительные значения εNd здесь могут являться, как результатом привноса терригенной примеси, так и быть следствием диффузной эндогенной подпитки. Образцы, отобранные с подводного хребта Зонне, отражают величину εNd морской воды (-3.2). Значение εNd гидрогенной корки Вулкана 7.14 составляет -3.4, что соответствует величине этого показателя для тихоокеанских вод. В ЖМО Вулкана 5.5 εNd = -2.0. Такое повышение изотопного состава неодима может быть следствием умеренного разбавления морской водой гидротермального флюида, а также свидетельствовать о наличии в пробе обломков вулканитов. Наибольшее значение εNd (+4.4) установлено для вулканокластического песчаника пропитанного гидрооксидами Fe и Mn, такая величина εNd отражает смешение вулканомиктового материала с гидротермальным.

Переведенное название	Генезис и изотопный состав Nd железомарганцевых образований Охотского моря и Курильской островной дуги
Язык оригинала	английский
Номер статьи	8
Страницы (с-по)	1074-1087
Число страниц	14
Журнал	Russian Geology and Geophysics
Том	62
Номер выпуска	9
DOI	https://doi.org/10.2113/RGG20194142
Состояние	Опубликовано - сент. 2021

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title = "Genesis and Nd Isotope Composition of Ferromanganese Deposits of the Sea of Okhotsk and the Kuril Island Arc",

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 compo-sition. The positive εNd 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 εNd value specific to seawater (–3.2). The εNd value of hydrogenetic FMD from Volcano 7.14 is –3.4, which corresponds to the εNd value of the Pacific water. The FMD samples from Volcano 5.5 are characterized by εNd = –2.0. The higher εNd 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 εNd 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.",

keywords = "Ferromanganese deposits, Genesis, Kuril island arc, Nd isotope composition, Sea of Okhotsk",

author = "Mikhailik, {P. E.} and Vishnevskaya, {I. A.} and Mikhailik, {E. V.} and Blokhin, {M. G.} and Chervyakovskaya, {M. V.} and Rashidov, {V. A.} and X. Ren",

note = "Funding Information: The scientific expeditions of the above cruises were financially supported by the Presidium of the FEB RAS. The research was supported by grant 18-17-00015 (determination of the bulk contents of elements) from the Russian Science Foundation and by projects 18-05-00436A (determination of Nd isotope composition) and 18-05-00410A (preparation of samples for analysis) from the Russian Foundation for Basic Research. Publisher Copyright: {\textcopyright} 2021, Novosibirsk State University.",

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Genesis and Nd Isotope Composition of Ferromanganese Deposits of the Sea of Okhotsk and the Kuril Island Arc. / Mikhailik, P. E.; Vishnevskaya, I. A.; Mikhailik, E. V. и др.

В: Russian Geology and Geophysics, Том 62, № 9, 8, 09.2021, стр. 1074-1087.

Результат исследования: Научные публикации в периодических изданиях › статья › рецензирование

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AU - Mikhailik, E. V.

AU - Blokhin, M. G.

AU - Chervyakovskaya, M. V.

AU - Rashidov, V. A.

AU - Ren, X.

N1 - Funding Information: The scientific expeditions of the above cruises were financially supported by the Presidium of the FEB RAS. The research was supported by grant 18-17-00015 (determination of the bulk contents of elements) from the Russian Science Foundation and by projects 18-05-00436A (determination of Nd isotope composition) and 18-05-00410A (preparation of samples for analysis) from the Russian Foundation for Basic Research. Publisher Copyright: © 2021, Novosibirsk State University.

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N2 - 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 compo-sition. The positive εNd 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 εNd value specific to seawater (–3.2). The εNd value of hydrogenetic FMD from Volcano 7.14 is –3.4, which corresponds to the εNd value of the Pacific water. The FMD samples from Volcano 5.5 are characterized by εNd = –2.0. The higher εNd 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 εNd 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.

AB - 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 compo-sition. The positive εNd 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 εNd value specific to seawater (–3.2). The εNd value of hydrogenetic FMD from Volcano 7.14 is –3.4, which corresponds to the εNd value of the Pacific water. The FMD samples from Volcano 5.5 are characterized by εNd = –2.0. The higher εNd 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 εNd 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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KW - Kuril island arc

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KW - Sea of Okhotsk

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