Записей: 2267
Girina O.A., Melnikov D.V., Manevich A.G., Nuzhdaev A.A., Petrova E.G. The 2019 Activity of Kamchatka and Kurile Islands Volcanoes and Danger to Aviation // Japan Geoscience Union Meeting 2020. Japan, Chiba: JpGU. 2020. № HDS10-P01.
Ozerov A.Yu., Girina O.A., Zharinov N.A., Belousov A.B., Demyanchuk Yu.V. Eruptions in the Northern Group of Volcanoes, in Kamchatka, during the Early 21st Century // Journal of Volcanology and Seismology. 2020. V. 14. P. 1-17. https://doi.org/10.1134/S0742046320010054.    Аннотация
The early 21st century saw increased eruption activity of major volcanoes in the Northern Group of Kamchatka, namely, Sheveluch, Klyuchevskoy, Bezymianny, and the Tolbachik Fissure Zone. The growth of an extrusive dome on Sheveluch andesitic volcano has occurred, with the dome reaching a height of 600 m after 38 years of nearly uninterrupted eruption activity. An 8-year period of relative quiet was followed by ten summit eruptions and two lateral vent openings on the Klyuchevskoy basaltic volcano. Explosive–effusive eruptions were observed nearly every year on the Bezymianny andesitic volcano. A 36-year quiet period gave way to a new eruption in the Tolbachik regional fissure zone.
Белоусов А.Б., Белоусова М.Г. Лавовый дрейф вулканолога Попкова // Природа. 2020. № 1. С. 50-59. doi: 10.7868/S0032874X20010056.
Гирина О.А., Маневич А.Г., Мельников Д.В., Нуждаев А.А., Лупян Е.А. Активность вулканов Камчатки и Курильских островов в 2019 г. и их опасность для авиации // Вулканизм и связанные с ним процессы. Материалы XXIII ежегодной научной конференции, посвящённой Дню вулканолога. Петропавловск-Камчатский: ИВиС ДВО РАН. 2020. С. 11-14.
Горбач Н.В., Гирина О.А. Особенности химического состава продуктов извержения вулкана Безымянный в марте 2019 г. // Вулканизм и связанные с ним процессы. Материалы XXIII ежегодной научной конференции, посвящённой Дню вулканолога. Петропавловск-Камчатский: ИВиС ДВО РАН. 2020. С. 15-17.
Мельников Д.В., Ушаков С.В., Гирина О.А., Маневич А.Г. Формирование новых озёр в Активной воронке Мутновского вулкана и кратере вулкана Райкоке // Вулканизм и связанные с ним процессы. Материалы XXIII ежегодной научной конференции, посвящённой Дню вулканолога. Петропавловск-Камчатский: ИВиС ДВО РАН. 2020. С. 42-44.
Озеров А.Ю., Гирина О.А., Жаринов Н.А., Белоусов А.Б., Демянчук Ю.В. Извержения вулканов Северной группы Камчатки в начале XXІ века // Вулканология и сейсмология. 2020. № 1. С. 3-19. doi: 10.31857/S0203030620010058.    Аннотация
В начале XXІ в. наблюдается повышенная эруптивная активность крупнейших вулканов Северной группы Камчатки: Шивелуч, Ключевской, Безымянный и Толбачинской трещинной зоны. Отмечаются особенности роста экструзивного купола андезитового вулкана Шивелуч: за 38 лет почти непрерывной эруптивной деятельности высота купола достигла 600 м. После восьмилетнего периода относительного покоя произошло девять вершинных извержений и два боковых прорыва базальтового вулкана Ключевской. Почти ежегодно наблюдались эксплозивно-эффузивные извержения андезитового вулкана Безымянный. После 36 лет покоя в районе Толбачинской региональной трещинной зоны произошло новое извержение.

At the beginning of the XXI century, increased eruptive activity of the largest volcanoes of the Northern group of Kamchatka is observed: Sheveluch, Klyuchevskoy, Bezymianny and Tolbachinskay fissure zone. The features of growth of andesitic Sheveluch volcano extrusive dome are noted: the height of the dome has reached 600 m during 38 years of almost continuous eruptive activity. After an eight-year period of relative rest, nine terminal eruptions and two lateral breakthroughs of the Klyuchevskoy basalt volcano occurred. Explosive-effusive eruptions of the andesitic Bezymianny volcano were observed almost annually. After 36 years of rest, a new eruption occurred in the Tolbachinsky regional fissure zone.
Bergal-Kuvikas Olga, Rogozin Aleksei, Kliapitskiy Evgeniy The role of coastal marine environment in formation the Miocene basaltic andesite ignimbrites at Eastern volcanic belt, Kamchatka // Geophysical Research Abstracts, EGU2019-594. 2019. V. 21.
Bindeman I.N., Leonov V.L., Colon D.P., Rogozin A.N., Shipley N.K., Jicha B.R., Loewen M.W., Gerya T.V. Isotopic and Petrologic Investigation, and a Thermomechanical Model of Genesis of Large-Volume Rhyolites in Arc Environments: Karymshina Volcanic Complex, Kamchatka, Russia // Frontiers in Earth Science/Volcanology. 2019. V. 6. № 238. doi: 10.3389/feart.2018.00238.    Аннотация
The Kamchatka Peninsula of eastern Russia is currently one of the most volcanically active areas on Earth where a combination of > 8 cm/yr subduction convergence rate and thick continental crust generates large silicic magma chambers, reflected by abundant large calderas and caldera complexes. This study examines the largest center of silicic 4-0.5 Ma Karymshina Volcanic Complex, which includes the 25 × 15 km Karymshina caldera, the largest in Kamchatka. A series of rhyolitic tuff eruptions at 4 Ma were followed by the main eruption at 1.78 Ma and produced an estimated 800 km3 of rhyolitic ignimbrites followed by high-silica rhyolitic post-caldera extrusions. The postcaldera domes trace the 1.78 Ma right fracture and form a continuous compositional series with ignimbrites. We here present results of a geologic, petrologic, and isotopic study of the Karymshina eruptive complex, and present new Ar-Ar ages, and isotopic values of rocks for the oldest pre- 1.78 Ma caldera ignimbrites and intrusions, which include a diversity of compositions from basalts to rhyolites. Temporal trends in δ18O, 87Sr/86Sr, and 144Nd/143Nd indicate values comparable to neighboring volcanoes, increase in homogeneity, and temporal increase in mantle-derived Sr and Nd with increasing differentiation over the last 4 million years. Data are consistent with a batholithic scale magma chamber formed by primarily fractional crystallization of mantle derived composition and assimilation of Cretaceous and younger crust, driven by basaltic volcanism and mantle delaminations. All rocks have 35–45% quartz, plagioclase, biotite, and amphibole phenocrysts. Rhyolite-MELTS crystallization models favor shallow (2 kbar) differentiation conditions and varying quantities of assimilated amphibolite partial melt and hydrothermally-altered silicic rock. Thermomechanical modeling with a typical 0.001 km3/yr eruption rate of hydrous basalt into a 38 km Kamchatkan arc crust produces two magma bodies, one near the Moho and the other engulfing the entire section of upper crust. Rising basalts are trapped in the lower portion of an upper crustal magma body, which exists in a partially molten to solid state. Differentiation products of basalt periodically mix with the resident magma diluting its crustal isotopic signatures. At the end of the magmatism crust is thickened by 8 km. Thermomechanical modeling show that the most likely way to generate large spikes of rhyolitic magmatism is through delamination of cumulates and mantle lithosphere after many millions of years of crustal thickening. The paper also presents a chemical dataset for Pacific ashes from ODDP 882 and 883 and compares them to Karymshina ignimbrites and two other Pleistocene calderas studied by us in earlier works.
Filatov S., Shablinskii A., Vergasova L., Saprikina O., Bubnova R., Moskaleva S., Belousov Alexander Belomarinaite KNa (SO 4): A new sulfate from 2012–2013 Tolbachik Fissure eruption, Kamchatka Peninsula, Russia // Mineralogical Magazine. 2019. V. 83. № 4. P. 569-577. doi: 10.1180/mgm.2018.170.

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