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Abrupt transition from fractional crystallization to magma mixing at Gorely volcano (Kamchatka) after caldera collapse (2016)
Gavrilenko Maxim, Ozerov Alexey, Kyle Philip R., Carr Michael J., Nikulin Alex, Vidito Christopher, Danyushevsky Leonid Abrupt transition from fractional crystallization to magma mixing at Gorely volcano (Kamchatka) after caldera collapse // Bulletin of Volcanology. 2016. Vol. 78. № 7. doi:10.1007/s00445-016-1038-z.
   Аннотация
A series of large caldera-forming eruptions (361–38 ka) transformed Gorely volcano, southern Kamchatka Peninsula, from a shield-type system dominated by fractional crystallization processes to a composite volcanic center, exhibiting geochemical evidence of magma mixing. Old Gorely, an early shield volcano (700–361 ka), was followed by Young Gorely eruptions. Calc-alkaline high magnesium basalt to rhyolite lavas have been erupted from Gorely volcano since the Pleistocene. Fractional crystallization dominated evolution of the Old Gorely magmas, whereas magma mixing is more prominent in the Young Gorely eruptive products. The role of rechargeevacuation processes in Gorely magma evolution is negligible (a closed magmatic system); however, crustal rock assimilation plays a significant role for the evolved magmas. Most Gorely magmas differentiate in a shallow magmatic system at pressures up to 300 MPa, ∼3 wt% H2O, and oxygen fugacity of ∼QFM + 1.5 log units. Magma temperatures of 1123–1218 °C were measured using aluminum distribution between olivine and spinel in Old and Young Gorely basalts. The crystallization sequence of major minerals for Old Gorely was as follows: olivine and spinel (Ol + Sp) for mafic compositions (more than 5 wt% of MgO); clinopyroxene and plagioclase crystallized at ∼5 wt% of MgO (Ol +Cpx + Plag) and magnetite at ∼3.5 wt% of MgO (Ol + Cpx + Plag +Mt). We show that the shallow magma chamber evolution of Old Gorely occurs under conditions of decompression and degassing. We find that the caldera-forming eruption(s) modified the magma plumbing geometry. This led to a change in the dominant magma evolution process from fractional crystallization to magma mixing. We further suggest that disruption of the magma chamber and accompanying change in differentiation process have the potential to transform a shield volcanic system to that of composite cone on a global scale.
Acid volcanism and thermal manifestations in the area of Mutnovsky and Gorely volcanoes (Southern Kamchatka) (1967)
Kirsanov I.T. Acid volcanism and thermal manifestations in the area of Mutnovsky and Gorely volcanoes (Southern Kamchatka) // Bulletin Volcanologique. 1967. Vol. 30. Vol. 1. P. 139-151. 13 p. doi:10.1007/BF02597664.
Active Volcanoes of Kamchatka and Kuril Islands: Status in 1982 (1988)
Ivanov B.V., Chirkov A.M., Dubik Y.M., Khrenov A.P., Dvigalo V.N., Razina A.A., Stepanov V.V., Chubarova O.S. Active Volcanoes of Kamchatka and Kuril Islands: Status in 1982 // Volcanology and Seismology. 1988. Vol. 6. № 4. P. 623-634.
Active volcanoes of Kamchatka and Northern Kurils in 2005 (2007)
Girina O.A., Manevich A.G., Malik N.A., Melnikov D.V., Ushakov S.V., Demyanchuk Yu.V., Kotenko L.V. Active volcanoes of Kamchatka and Northern Kurils in 2005 // Journal of Volcanology and Seismology. 2007. Vol. 1. № 4. P. 237-247. https://doi.org/10.1134/S0742046307040021.
   Аннотация
In 2005, six major eruptions of four Kamchatka volcanoes (Bezymyannyi, Klyuchevskoy, Shiveluch, and Karymskii) occurred and the Avachinskii, Mutnovskii, and Gorelyi Kamchatka volcanoes and the Ebeko and Chikurachki volcanoes in northern Kurils were in a state of increased activity. Owing to a close collaboration between the KVERT project, Elizovo airport meteorological center, and volcanic ash advisory centers in Tokyo, Anchorage, and Washington (Tokyo, Anchorage, and Washington VAACs), all necessary measures for safe airplane flights near Kamchatka were taken and fatal accidents related to volcanic activity did not occur.
Active volcanoes on Kamchatka, Russia (2006)
Gordeev E.I., Girina O.A., Ushakov S.V., Senyukov S.L. Active volcanoes on Kamchatka, Russia // Abstracts for Fourth International Conference Cities on Volcanoes. IAVCEI. Quito-Ecuador. January 23-27. 2006. 2006. P. 22
Activity in the Karymsky Center in 1996: Summit Eruption at Karymsky and Phreatomagmatic Eruption in the Akademii Nauk Caldera (1998)
Muravyev Y.D., Fedotov S.A., Budnikov V.A., Ozerov A.Yu., Maguskin M.A., Dvigalo V.N., Andreev V.I., Ivanov V.V., Kartasheva L.A., Markov I.A. Activity in the Karymsky Center in 1996: Summit Eruption at Karymsky and Phreatomagmatic Eruption in the Akademii Nauk Caldera // Volcanology and Seismology. 1998. Vol. 19. № 5. P. 567-604.
   Аннотация
Data are presented from studies of volcanoes in the Karymsky long-living volcanic center, Kamchatka in 1996. We examine the dynamics and rock composition for eruptions that started simultaneously on Karymsky Volcano and in the Akademia Nauk caldera. The effusive-explosive eruption of Karymsky Volcano was resumed after a 14-year repose period, producing about 30 million tons of andesite-dacite discharges through the summit vent. Long-continued eruptive activity of that volcano is supposed to go on during the near future. Simultaneously with this activity, typical of Karymsky Volcano, a subaquaceous explosive eruption was observed in the lake that occupies the Akademia Nauk caldera 6 km south of the volcano for the first time in Kamchatka during the historical period. An edifice arose in the northern part of Lake Karymsky during 18 hours of this eruption consisting of basaltic and basaltic andesite pyroclastic material surrounding a crater of diameter 650 m. The amount of erupted pyroclastic material is estimated as 0.04 km3, the total weight being over 70 million tons. A discussion is provided of the impact of these eruptions on the environment; we describe renewed hydrothermal activity and the formation of a new group of hot springs in the Akademia Nauk caldera, and estimate the possibility of breakthrough floods from Lake Karymsky etc.
Activity of Kamchatkan Volcanoes in 2012-2013 and Danger to Aviation (2014)
Girina O.A., Manevich A.G., Melnikov D.V., Nuzhdaev A.A., Demyanchuk Yu.V. Activity of Kamchatkan Volcanoes in 2012-2013 and Danger to Aviation // Abstracts. International Workshop “JKASP-8”. Sapporo. Japan. September 22-26. 2014. 2014.
Activity of Kamchatkan and Northern Kuriles volcanoes database of Kamchatkan volcanic eruption response team (2015)
Girina O.A., Romanova I.M. Activity of Kamchatkan and Northern Kuriles volcanoes database of Kamchatkan volcanic eruption response team // 26th IUGG General Assembly. June 22-July 02, 2015. Abstracts. Prague: IUGG/IAVCEI. 2015. P. VS10p-456.
Activity of North Kamchatkan volcanoes in 1985 (1990)
Zharinov N.A., Zhdanova E.Yu., Belousov A.B., Belousova M.G., Ivanov A.P., Malyshev A.I., Khanzutin V.P. Activity of North Kamchatkan volcanoes in 1985 // Volcanology and Seismology. 1990. Vol. 10. Vol. 3. P. 331-346.
Activity of Volcanoes in Kamchatka and the Kuril Islands in 1983 (1988)
Ivanov B.V., Gavrilenko G.M., Dvigalo V.N., Ovsyannikov A.A., Ozerov A.Yu., Razina A.A., Tokarev P.I., Khrenov A.P., Chirkov A.M. Activity of Volcanoes in Kamchatka and the Kuril Islands in 1983 // Volcanology and Seismology. 1988. Vol. 6. № 6. P. 959-972.