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Gas Emissions From Volcanoes of the Kuril Island Arc (NW Pacific): Geochemistry and Fluxes

Taran Yuri, Zelenski Mikhail, Chaplygin Ilya, Malik Natalia, Campion Robin, Inguaggiato Salvatore, Pokrovsky Boris, Kalacheva Elena, Melnikov Dmitry, Kazahaya Ryunosuke, Fischer Tobias (2018) Gas Emissions From Volcanoes of the Kuril Island Arc (NW Pacific): Geochemistry and Fluxes // Geochemistry, Geophysics, Geosystems. Vol. 19, Vol. 6. pp. 1859-1880. doi: 10.1029/2018GC007477.

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Official URL: https://agupubs.onlinelibrary.wiley.com/doi/abs/10...

Abstract

The Kuril Island arc extending for about 1,200 km from Kamchatka Peninsula to Hokkaido Island is a typical active subduction zone with ∼40 historically active subaerial volcanoes, some of which are persistently degassing. Seven Kurilian volcanoes (Ebeko, Sinarka, Kuntomintar, Chirinkotan, Pallas, Berg, and Kudryavy) on six islands (Paramushir, Shiashkotan, Chirinkotan, Ketoy, Urup, and Iturup) emit into the atmosphere > 90% of the total fumarolic gas of the arc. During the field campaigns in 2015–2017 direct sampling of fumaroles, MultiGas measurements of the fumarolic plumes and DOAS remote determinations of the SO2 flux were conducted on these volcanoes. Maximal temperatures of the fumaroles in 2015–2016 were 510°C (Ebeko), 440°C (Sinarka), 260°C (Kuntomintar), 720°C (Pallas), and 820°C (Kudryavy). The total SO2 flux (in metric tons per day) from fumarolic fields of the studied volcanoes was measured as ∼1,800 ± 300 t/d, and the CO2 flux is estimated as 1,250 ± 400 t/d. Geochemical characteristics of the sampled gases include δD and δ18O of fumarolic condensates, δ13C of CO2, δ34S of the total sulfur, ratios 3He/4He and 40Ar/36Ar, concentrations of the major gas species, and trace elements in the volcanic gas condensates. The mole ratios C/S are generally <1. All volcanoes of the arc, except the southernmost Mendeleev and Golovnin volcanoes on Kunashir Island, emit gases with 3He/4He values of >7RA (where RA is the atmospheric 3He/4He). The highest 3He/4He ratios of 8.3RA were measured in fumaroles of the Pallas volcano (Ketoy Island) in the middle of the arc.
Item Type: Article
Title: Gas Emissions From Volcanoes of the Kuril Island Arc (NW Pacific): Geochemistry and Fluxes
Language: English
Journal or Publication Title: Geochemistry, Geophysics, Geosystems
ISSN Online: 1525-2027
Subjects: State scientific and technical information rubricator (ГРНТИ) > 38 ГЕОЛОГИЯ > 38.37 Петрография > 38.37.25 Вулканология
Volcanoes > 1 Volcanoes of the Kurile-Kamchatka Region > 1.2 Kurile Islands > Chirinkotan
Volcanoes > 1 Volcanoes of the Kurile-Kamchatka Region > 1.2 Kurile Islands > Ebeko
Volcanoes > 1 Volcanoes of the Kurile-Kamchatka Region > 1.2 Kurile Islands > _ Volcanoes of Kurile Islands
Volcanoes > 1 Volcanoes of the Kurile-Kamchatka Region > 1.2 Kurile Islands > Pallas Peak
Volcanoes > 1 Volcanoes of the Kurile-Kamchatka Region > 1.2 Kurile Islands > Kudryavy
Volcanoes > 1 Volcanoes of the Kurile-Kamchatka Region > 1.2 Kurile Islands > Kuntomintar
Volcanoes > 1 Volcanoes of the Kurile-Kamchatka Region > 1.2 Kurile Islands > Sinarka
Projects: Russian Science Foundation, grant 15–17-20011
Depositing User: Д.В. Мельников
Date Deposited: 12 Aug 2018 02:18
Last Modified: 12 Aug 2018 02:18
URI: http://repo.kscnet.ru/id/eprint/3325

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