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Records: 2741
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Lundgren Paul, Kiryukhin Alexey, Milillo Pietro, Samsonov Sergey Dike model for the 2012–2013 Tolbachik eruption constrained by satellite radar interferometry observations // Journal of Volcanology and Geothermal Research. 2015. Vol. 307. P. 79 - 88. doi: 10.1016/j.jvolgeores.2015.05.011.
   Annotation
Abstract A large dike intrusion and fissure eruption lasting 9 months began on November 27, 2013, beneath the south flank of Tolbachik Volcano, Kamchatka, Russia. The eruption was the most recent at Tolbachik since the Great Tolbachik Eruption from 1975 to 1976. The 2012 eruption was preceded by more than 6 months of seismicity that clustered beneath the east flank of the volcano along a NW–SE trend. Seismicity increased dramatically before the eruption, with propagation of the seismicity from the central volcano conduit in the final hours. We use interferometric synthetic aperture radar (InSAR) to compute relative displacement images (interferograms) for {SAR} data pairs spanning the eruption. We use satellite {SAR} data from the Canadian Space Agency's RADARSAT-2 and from the Italian Space Agency's COSMO-SkyMed missions. Data are modeled first through a Markov Chain Monte Carlo solution for a single tensile dislocation (dike). We then use a boundary element method that includes topography to model a distributed dike-opening model. We find the best-fitting dike dips 80° to the {WNW} with maximum opening of 6–8 m, localized in the near surface and more broadly distributed in distinct regions up to 3 km beneath the surface, which varies from 1 to 2 km elevation for the eruptive fissures. The distribution of dike opening and its correspondence with co-diking seismicity suggests that the dike propagated radially from Tolbachik's central conduit.
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Maksimov A.P. A Physicochemical Model for Deep Degassing of Water-Rich Magma // Journal of Volcanology and Seismology. 2008. Vol. 2. № 5. P. 356-363. doi: 10.1134/S0742046308050059.
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На примере двух мощных извержений конуса Квицапу вулкана Сьерро-Ассуль (Чили) рассматривается проблема эффузивных извержений магм с высокими предэруптивными содержаниями летучих. Предложен физико-химический механизм дегазации магм с потерей ими летучих до появления на поверхности. Модель основана на взаимодействии магм, находившихся в разных по глубине очагах, и различии между растворимостью воды в расплаве и ее равновесной концентрацией в протяженном по вертикали магматическом теле. При этом малоглубинный очаг может аккумулировать летучие, выделяющиеся из магмы, поступающей в него из глубинного очага. Дается объяснение резких различий в характере извержений 1846–1847 и 1932 г. при идентичном химико-петрографическом составе магм.
Maksimov A.P., Firstov P.P., Girina O.A., Malyshev A.I. The June 1986 eruption of Bezymyannyi // Volcanology and Seismology. 1992. Vol. 13. № 1. P. 1-20.
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This paper presents the results of visual observations, particle-size analysis, seismological observations, and acoustic measurements carried out during a small-magnitude eruption of Bezymyannyi in June 1986. A mlodel is proposed for the mechanism of the eruption. A specific character of the eruption is explained by a deeper localization of a gas-rich aagia portion in the conduit,
Maleyev E.F. Two types of acid volcanism // Bulletin Volcanologique. 1967. Vol. 30. Vol. 1. P. 153-160. 8 p. doi:10.1007/BF02597665.
Malkovsky S.I., Sorokin A.A., Korolev S.P., Girina O.A., Loupian E.A. Models of Volcanic Ash Propagation for the Exploration of Explosive Eruptions of Kamchatka Volcanoes // JKASP-2018. Petropavlovsk-Kamchatsky: IVS FEB RAS. 2018.
Manevich A.G., Girina O.A., Melnikov D.V., Nuzhdaev A.A. 2016-2017 explosive eruptions of Kamchatka volcanoes based on KVERT data // JKASP-2018. Petropavlovsk-Kamchatsky: IVS FEB RAS. 2018.
Mania Rene, Walter Thomas, Belousova Marina, Belousov Alexander, Senyukov Sergey Deformations and Morphology Changes Associated with the 2016–2017 Eruption Sequence at Bezymianny Volcano, Kamchatka // Remote Sensing. 2019. № 11. P. 1278 doi: 10.3390/rs11111278.
Marchenko A. G., Volfson A. A., Morozov M. V., Khrol N. S., Steinberg G. S., Steinberg M. G. Geochemical Characteristics of Volcanogenic Deposits and Exhalation Mineralization in the Crater Part of the Active Kudryavy Volcano (Iturup Island of the Kuril Arc) // Geology of Ore Deposits. 2020. Vol. 62. № 2. P. 122-137. doi:10.1134/S1075701520020038.
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Exhalation ore mineralization is developing in the crater part of the active Kudryavy volcano. Lithogeochemical sampling results have revealed that Re, Au, Ag, As, Bi, Cd, Cu, Ge, In, Mo, Pb, S, Sb, Se, Sn, Te, Tl, W, Zn, Rb, and Cs accumulate in solid fumarole formations. These elements are transported by high-temperature volcanic gases and are deposited in mineral phases in the near-surface horizons of fumarole fields under decreasing temperature conditions. The contents of rhenium and other metals in volcanic deposits of fumarole fields locally reach values characteristic of ore deposits. Zoning of lithogeochemical anomalies in ore element associations has been revealed, expressed by the series Re, Mo, W, Au, Cu, Ag, Zn, Cs, Ge → In → Bi, Cd, Pb, Sn, Tl → As, Sb, Se, Te, (Cu, Ag, Au) in the direction from the highest-temperature fumarole fields to less hot, reflecting their temperature zoning. It is demonstrated that lateral geochemical zoning is caused both by the ore element contents in fumarole gases, which depend on temperature, and by differences in the optimal temperature ranges in which various elements precipitate from gases. Signatures for similar exhalation mineral formation processes have been revealed that occurred in the recent geological past at the neighboring extinct Sredny volcano. This suggests the occurrence of similar processes within other volcanic systems of Iturup Island, which increases the prospects for detecting complex exhalation-related manifestations of rare, base, and noble metals.
Marhinin E.K., Stratula D.S. Relationship between chemical composition of volcanic rocks and depth of the seismofocal layer as shown by the Kliuchevskaya volcanic Grup (Kamchatka) and the Kurile-Kamchatka Island arc // Bulletin Volcanologique. 1973. Vol. 37. Vol. 2. P. 175-182. 8 p. doi:10.1007/BF02597129.
Markhinin E.K. On the State of Kunashir Island Volcanoes (March, 1974 - May, 1982) // Volcanology and Seismology. 1983. № 1. P. 45-52.