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Records: 2399
 F
Fractionation history recorded in phenocrysts: LA-ICPMS study of clinopyroxenes from Klyuchevskoy and Bezymianny volcanoes, Kamchatka (2006)
Almeev R.R., Kimura J.I., Ariskin A.A., Ozerov A.Yu. Fractionation history recorded in phenocrysts: LA-ICPMS study of clinopyroxenes from Klyuchevskoy and Bezymianny volcanoes, Kamchatka // Berichte der Deutchen Mineralogischen Gesellschaft (N1). DMG-2006 Hannover, Germany, 25-27 September 2006. 2006. P. 8
From high-Mg basalts to dacites: continued crystal fractionation in the Klyuchevskoy-Bezymianny magma plumbing system, Kamchatka (2003)
Almeev R.R., Kimura J.I., Ozerov A.Yu., Ariskin A.A., Barmina G.S. From high-Mg basalts to dacites: continued crystal fractionation in the Klyuchevskoy-Bezymianny magma plumbing system, Kamchatka // Goldschmidt Conference Abstracts 2003. 2003. P. A13
 G
Gas composition in Mutnovsky geothermal field: Role of meteoric water (2011)
Maximov A.P., Firstov P.P., Chernev I.I., Shapar V.N. Gas composition in Mutnovsky geothermal field: Role of meteoric water // 11th Gas Workshop. 1-10 September 2011, Kamchatka, Russia. 2011. P. 31
Gas Emissions From Volcanoes of the Kuril Island Arc (NW Pacific): Geochemistry and Fluxes (2018)
Taran Yuri, Zelenski Mikhail, Chaplygin Ilya, Malik Natalia, Campion Robin, Inguaggiato Salvatore, Pokrovsky Boris, Kalacheva Elena, Melnikov Dmitry, Kazahaya Ryunosuke, Fischer Tobias Gas Emissions From Volcanoes of the Kuril Island Arc (NW Pacific): Geochemistry and Fluxes // Geochemistry, Geophysics, Geosystems. 2018. Vol. 19. Vol. 6. P. 1859-1880. doi: 10.1029/2018GC007477.    Annotation
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.
Gas regime defining the mechanism of periodic lava fountaining of basaltic volcanoes (experimental modeling) (2011)
Ozerov A.Yu. Gas regime defining the mechanism of periodic lava fountaining of basaltic volcanoes (experimental modeling) // Commission on the chemistry of volcanic gases (CCVG) - IAVCEI. 11th Gas Workshop, Kamchatka, Russia. 1-10 September 2011. 2011. P. 35
Gas-hydrodynamic model of basalt explosions (based on experimental data) (2008)
Ozerov A. Gas-hydrodynamic model of basalt explosions (based on experimental data) // 33rd International Geological Congress. Oslo, Norway. Abstracts. 2008.
Generation of calc-alkaline andesite of the Tatun volcanic group (Taiwan) within an extensional environment by crystal fractionation (2014)
Shellnutt J. Gregory, Belousov Alexander, Belousova Marina, Wang Kuo-Lung, Zellmer Georg F. Generation of calc-alkaline andesite of the Tatun volcanic group (Taiwan) within an extensional environment by crystal fractionation // International Geology Review. 2014. Vol. 56. № 9. P. 1156-1171. doi:10.1080/00206814.2014.921865.
Generation of pyroclastic flows by explosive interaction of lava flows with ice/water-saturated substrate (2011)
Belousov Alexander, Behncke Boris, Belousova Marina Generation of pyroclastic flows by explosive interaction of lava flows with ice/water-saturated substrate // Journal of Volcanology and Geothermal Research. 2011. Vol. 202. № 1-2. P. 60-72. doi:10.1016/j.jvolgeores.2011.01.004.
Genesis of High-Alumina Basalts from Klyuchevskoi Volcano (1995)
Ariskin A.A., Barmina G.S., Ozerov A.Yu., Nielsen R.L. Genesis of High-Alumina Basalts from Klyuchevskoi Volcano // Petrology. 1995. Vol. 3. № 5. P. 449-472.
Genesis of Quaternary volcanism of high-Mg andesitic rocks in the northeast Kamchatka Peninsula (2016)
Nishizawa Tatsuji, Nakamura Hitomi, Churikova T., Gordeychik B., Ishizuka Osamu, Iwamori Hikaru Genesis of Quaternary volcanism of high-Mg andesitic rocks in the northeast Kamchatka Peninsula // Japan Geoscience Union Meeting. 22-26 May 2016, Makuhari, Messe. 2016. P. SVC48-02.    Annotation
Arc magmatism is a product of subduction factory, involving thermal and chemical interactions
between a subducted slab as a material input and mantle wedge as a processing factory. In turn, the
compositions of arc magma provide invaluable information concerning the material input and the
interactions. The northeast Kamchatka Peninsula is an ideal field to examine such interactions and
relationships, being characterized by (1) subduction of the Emperor Seamount Chain (Davaille and
Lees, 2004), and (2) possible material and thermal interaction among the subducted slab, the
overlying mantle wedge and the sub-slab mantle via the edge of subducted Pacific slab (Portnyagin
and Manea, 2008). Within this area, a monogenetic volcanic group occurs along the east coast,
including high-Mg andesitic rocks and relatively primitive basalts (East Cones, EC (Fedorenko,
1969)). We have conducted geochemical studies of the EC lavas, with bulk rock major and trace
elements, and K-Ar and Ar-Ar ages, based on which a possible contribution of subducted seamounts
and its relation to the tectonic setting are discussed.
The elemental compositions indicate that the lavas from individual cones have distinct mantle
sources with different amounts and/or compositions of slab-derived fluids. Based on mass balance,
water content and melting phase relations, we estimate the melting P-T conditions to bet ~1200 ℃
at 1.5 GPa, while the slab surface temperature is 620 –730 ℃ (at 50-80 km depth). Compared with
the southern part of Kamchatka, the slab surface temperature beneath EC seems to be high due to the
thinner Pacific slab associated with the seamount chain and/or the plate rejuvenation from a mantle
plume impact (Davaille and Lees, 2004; Manea and Manea, 2007).
The K-Ar and Ar-Ar ages of the Middle Pleistocene are consistent with the tephrochronological
study (Uspensky and Shapiro, 1984) and the present tectonic setting after 2 Ma (Lander and Shapiro,
2007). The high-Mg andesite with the highest SiO2 content in the EC lavas shows the oldest age
(0.73 ±0.06 Ma) within not only EC but also the northeast part of Kamchatka (e.g., Churikova et
al., 2015, IAVCEI). On the other hand, the rest of EC lava samples show relatively younger ages to
0.18 ±0.07 Ma. These results suggest that the EC lavas including high-Mg andesite and basalt were
generated by mantle flux-melting induced by dehydration of a subducted seamount inheriting a local
thermal anomaly (Nishizawa et al., 2014, JpGU; 2015, JpGU).

島弧火成活動はサブダクションファクトリーの産物で, それは沈み込んだスラブ(物質のインプット)-マン
トルウェッジ(加工工場)間の熱的・物質的相互作用を含む. 島弧マグマの組成は, その物質インプットと相
互作用について非常に貴重な情報をもたらす. カムチャツカ半島北東部はそのような相互作用と関係性を調べ
るうえで理想的な場所である, それは次のような特徴を有する為だ(1)天皇海山列の沈み込み(Davaille and
Lees, 2004)(2)沈み込んだスラブ, マントルウェッジと太平洋スラブエッジにかけてのサブスラブマントル
との物質的・熱的相互作用の可能性(Portnyagin and Manea, 2008). この地域の東海岸沿いに, 高-Mg安山岩
と比較的初生的な玄武岩を産出する単成火山群が確認されている(East Cones, EC(Fedorenko, 1969)).
我々はこのEC溶岩について全岩主要-微量元素組成分析とK-Ar, Ar-Ar年代測定を含む地球化学的研究を行い,
沈み込んだ海山からの寄与の可能性とテクトニックセッティングとの関係について議論する.
EC溶岩の組成は, 火山ごとに独立したソースに由来しており, そのソースの違いはスラブ起源流体の量および
またはその組成の違いによることを示す. マスバランス, 含水量, 相関係に基づき, 我々は溶融温度-圧力条
件を推定した, 溶融温度・圧力~1200℃, 1.5 GPa, スラブ表面温度 620-730℃(深度50-80 km). カム
チャツカ南部に沈み込むスラブ表面温度と比較すると, EC直下のスラブ表面温度は高く, これは天皇海山列に
沿ったプレートの薄化およびまたは沈み込む直前のプルームからの熱的効果による若返り効果によるものと考
えられる(Davaille and Lees, 2004; Manea and Manea, 2007).
K-Ar, Ar-Ar年代測定値は中期更新世で, これはテフラ層序学からの推定年代と一致し(Uspensky and
Shapiro, 1984), 2Ma以降現在のテクトニックセッティングに変化したこととも矛盾しない(Lander and
Shapiro, 2007). 最もSiO2含有量が高い高Mg安山岩は最古の年代を示し(0.73 ±0.06 Ma), これはECのみな
らずカムチャツカ北東部においても最も古いとみられる(e.g., Churikova et al., 2015, IAVCEI). 一方他
のECはより若い年代を示す(~0.18 ±0.07 Ma). これらの結果は以下のことを示す: 高Mg安山岩, 玄武岩を
含むEC溶岩は沈み込んだ海山による局所的な温度異常がスラブ起源流体の脱水を強めそれによって生じたフ
ラックス溶融によりもたらされた(西澤他, 2014, JpGU; 2015, JpGU).



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