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Записей: 441
Ladygin V.М., Girina O.A., Frolova Yu.V. Petrophysical features of lava flows from Bezymyannyi volcano, Kamchatka // Journal of Volcanology and Seismology. 2012. Vol. 6. № 6. P. 341-351. https://doi.org/10.1134/S074204631206005X
Аннотация
This paper presents results from a study of lava flows that were discharged by Bezymyannyi Volcano at different times, from old (about 3500 years ago) to recent ones (1985–1989). We provide detailed descriptions of the composition, structure, and petrophysical properties for the main types of constituent rocks, which are andesites and basaltic andesites. It was found that porosity is the leading factor that controls rock properties, while the effects of structural and mineralogical features are less prominent. We demonstrate the variation in the properties of rocks that compose the lava flows in relation to their ages: the older a rock is, the higher its density and strength and the lower its porosity is.
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Ladygin V.М., Girina O.A., Frolova Yu.V. The Petrophysical Properties and Strength of Extrusive Rocks Discharged by Bezymianny Volcano, Kamchatka // Journal of Volcanology and Seismology. 2023. Vol. 17. № 3. P. 159-174. https://doi.org/10.1134/S0742046323700197
Аннотация
This is the first petrophysical study of extrusive rocks (dacites to andesites) discharged by Bezymianny Volcano. We provide a comparative description of properties for extrusive rocks in accordance with identified age groups. We show the dynamics in the variation of extrusive rock properties in relation to their ages, with the result that the older a rock the higher are its density, strength, and elastic parameters. Rocks petrophysical features are compared between extrusive domes and lava flows. We argue for petrophysical properties to be applicable for deriving more accurate results for the genesis of rocks having similar petrophysical properties, in particular, rocks of extrusive and effusive origin.
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Ladygin V.М., Girina O.A., Frolova Yu.V., Kondrashov I.A. The lava flows of Bezymianny volcano, Kamchatka // 4rd International Biennial Workshop on Subduction Processes emphasizing the Japan-Kurile-Kamchatka-Aleutian Arcs, Petropavlovsk-Kamchatsky, August 21-27, 2004. Petropavlovsk-Kamchatsky: IVS FED RAS. 2004. P. 63-64.
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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.
Аннотация
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,
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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.
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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. https://doi.org/10.3390/rs11111278
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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
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Maximov A.P. Petrological constraints on the mechanisms of catastrophic explosive eruptions of andesitic and acid magmas // 7 th Biennual Workshop on Japan-Kamchatka-Alaska Subduction Processes: Mitigating Risk Through International Volcano, Earthquake, and Tsunami Science (JKASP-2011). August 25-30, 2011, Petropavlovsk-Kamchatsky. 2011. P. 257-258.
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McGimsey R.G., Neal C.A., Girina O.A. 1998 Volcanic Activity in Alaska and Kamchatka: Summary of Events and Response of the Alaska Volcano Observatory Open-File Report 2004-1033. 2003. 35 p.
Аннотация
In 1998 the Alaska Volcano Observatory responded to eruptive activity or suspect volcanic activity at 7 volcanic centers--Shrub mud, Augustine, Becharof Lake area, Chiginagak, Shishaldin, Akutan, and Korovin.
In addition to responding to eruptive activity at Alaska volcanoes, AVO also disseminated information for the Kamchatkan Volcanic Eruption Response Team about the 1998 activity of 4 Russian volcanoes-Sheveluch, Klyuchevskoy, Bezymianny, and Karymsky.
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McGimsey R.G., Neal C.A., Girina O.A. 1999 Volcanic Activity in Alaska and Kamchatka: Summary of Events and Response of The Alaska Volcano Observatory Open-File Report 2004-1033. 2004. 45 p.
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