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Селянгин О.Б. К вулканам Мутновский и Горелый: Вулканологический и туристический путеводитель. Петропавловск-Камчатский: Холд. комп. "Новая книга". 2018. 112 с.
Development history and character of activity of the active volcanoes of south-Kamchatka group Mutnovsky and Gorely volcanoes which are the closest to the city of Petropavlovsk-Kamchatsky are described. They are popular objects of cognitive and sporting tourism. Geological map, schemes and descriptions of the excursion routes are given. They let us to acquaint with the brightest manifestations of volcanism, structure formation and gas-hydrothermal activity connected with it, with a nature of Mutnovsko-Gorelovsky region.
Edition is directed to the wide range of readers who has an interest in volcanic geology and nature of Kamchatka students of local lore, naturalists and tourists.
Селянгин О.Б. Контаминация магмы, особенности петрогенезиса и распределение рудного вещества в породах никеленосной формации Срединно-Камчатского массива (часть третья) // Вестник КРАУНЦ. Серия: Науки о Земле. 2018. Вып. 40. № 4. С. 5-22. doi: 10.31431/1816-5524-2018-4-40-5-22.
This is the final article that describes various for petro- and oreogenesis consequences of the contamination of nickel-bearing magma with siliceous material (quartzites), which led to the replacement of ultrabasic ore-hosting rocks (cortlandites) with ultramafic (amphibole orthopyroxenites). Besides, the paper describes the products of metamagmatic variations of pyroxene ore cumulates in biotite-amphibole rocks inported by water-potassium fluid. The author shows the unconventional results of fluid influence on similar cumulates with relics of quartzite xenoliths accompanied by the formation of ore granophyric autobreccies, as well as ore-bearing derivatives from the process of magma mixing (auto-contamination). We introduce an intraformational classification of copper-nickel ores by their associations with host rocks of different composition and origin — from juvenile magmatic ultrabasites, contaminated and ultramafites and melanodiorites to hybrid granitoids. The dynamics of the formation of intrusive ore-magmatic systems and the plausible reason of differences in the ore content of large and small intrusions are discussed.
Селянгин О.Б. Контаминация магмы, особенности петрогенезиса и распределение рудного вещества в породах никеленосной формации Срединно-Камчатского массива (часть вторая) // Вестник КРАУНЦ. Серия: Науки о Земле. 2018. Вып. 39. № 3. С. 9-25. doi: 10.31431/1816-5524-2018-3-39-9-25.
The article presents a discussion of contaminants in nickeliferous magmas of various composition and phase as metamorphic rocks and fluids. It describes distribution of different solid-phase contaminants (xenoliths) in intrusions and compositionally different accumulative rocks. Xenogenic material is represented both by host rocks with intrusions and deeper rocks with no surface outcropping. In order to estimate contamination effect on the variety of accumulative rock series and location of sulphide ores as a benchmark standard we use similar data on a ore-bearing intrusive rocks formed by nearly non-contaminated high-magnesian (parental) magma. Besides, the article describes contamination of magma by high-alumina coal slates as well as variety of forming series of its cumulative rocks and exotic floatation graphite-sulphide ores in aluminous granodiorites in one of the intrusive bodies.
Фирстов П.П., Лобачева М.А. Волновые возмущения в атмосфере, сопровождавшие извержение вулкана Камбальный (Камчатка) в 2017 г. // Вестник КРАУНЦ. Серия: Науки о Земле. 2018. Вып. 38. № 2. С. 45-58.
On March 24, 2017 Kambalniy Volcano started to erupt after a 500-year-long period of rest. The eruption continued till April 10, 2017. The paper provides the analysis of atmospheric wave disturbances as wavetrains of quasi-sinusoidal oscillations with a frequency of 8 Hz ("acoustic tremor" or AT), which occurred at certain moments during the eruption. Besides, the paper describes 3 strongest seismic signals registered at the initial stages of the eruptions simultaneously with AT, which was registered using an infrasound station IS44 installed 208 km NW far from the volcano. The nearest "Pauzhetka" seismic station installed 19 far from the volcano allowed monitoring the seismic build-up, which was short (2 days) and weak (Кmax = 8.6). Lack of definite discrete infrasound signals, which are usually caused by non-stationary process during explosive eruptions, gives evidence for peculiar pattern of formation and effusion of ash-and-gas emissions. Such uncommon acoustic radiations and seismic build-up prove the presumption that this eruption should be classified as a hydrothermal event.
Хубуная С.А., Гонтовая Л.И., Соболев А.В., Хубуная В.С. К вопросу о магматических очагах под вулканом Ключевской (Камчатка) // Вулканология и сейсмология. 2018. № 2. С. 14-30.
Numerous summit and parasitic eruptions of moderate potassium magnesian and high-alumina basalts and basaltic andesites, their mineralogic and geochemical features, and the composition of in situ chilled melt inclusions in the olivine of cinder lapilli discharged by Klyuchevskoi Volcano all provide evidence of the presence of magma chambers beneath the volcano. This is also supported by a dualism in the variation of CaO and A1203 concentrations in olivine and clinopyroxene during crystallization. The mineralogic features in the high-alumina basalts that were discharged by all parasitic eruptions of Klyuchevskoi provide evidence of magnesian magma being emplaced from a deeper chamber into a shallow high-alumina chamber. The distribution of incoherent elements in the volcano's magnesian and aluminiferous rocks shows that they came from a single mantle source. The geochemical and mineralogic data are in good agreement with the results of geophysical surveys that concern the structure and properties of the lithosphere beneath Klyuchevskoi.
Belousov A., Belousova M., Kozlov D. The distribution of tephra deposits and reconstructing the parameters of 1973 eruption on Tyatya volcano, Kunashir, Kurile Islands // Journal of Volcanology and Seismology. 2017. Vol. 11. № 4. P. 285-294.
Bergal-Kuvikas Olga, Nakagawa Mitsuhiro, Kuritani Takeshi, Muravyev Yaroslav, Malik Nataliya, Klimenko Elena, Amma-Miyasaka Mizuho, Matsumoto Akiko, Shimada Shunjiro A petrological and geochemical study on time-series samples from Klyuchevskoy volcano, Kamchatka arc // Contributions to Mineralogy and Petrology. 2017. Vol. 172. № 5. doi:10.1007/s00410-017-1347-z.
Churikova Tatiana, Gordeychik Boris, Wörner Gerhard, Flerov Gleb, Hartmann Gerald, Simon Klaus Geochemical evolution of Bolshaya Udina, Malaya Udina, and Gorny Zub volcanoes, Klyuchevskaya Group (Kamchatka) // Geophysical Research Abstracts. 2017. Vol. 19. P. EGU2017-10691.
The Klyuchevskaya group of volcanoes (KGV) located in the northern part of Kamchatka has the highest magma production rate for any arc worldwide and several of its volcanoes have been studied in considerable detail [e.g. Kersting & Arculus, 1995; Pineau et al., 1999; Dorendorf et al., 2000; Ozerov, 2000; Churikova et al., 2001, 2012, 2015; Mironov et al., 2001; Portnyagin et al., 2007, 2015; Turner et al., 2007]. However, some volcanoes of the KGV including Late-Pleistocene volcanoes Bolshaya Udina, Malaya Udina, Ostraya Zimina, Ovalnaya Zimina, and Gorny Zub were studied only on a reconnaissance basis [Timerbaeva, 1967; Ermakov, 1977] and the modern geochemical studies have not been carried out at all. Among the volcanoes of KGV these volcanoes are closest to the arc trench and may hold information on geochemical zonation with respect to across arc source variations. We present the first major and trace element data on rocks from these volcanoes as well as on their basement. All rocks are medium-calc-alkaline basaltic andesites to dacites except few low-Mg basalts from Malaya Udina volcano. Phenocrysts are mainly olivine, pyroxene, plagioclase and magnetite, Hb-bearing andesites and dacites are rarely found only in subvolcanic intrusions at Bolshaya Udina volcano. Lavas are geochemically similar to the active Bezymianny volcano, however, individual variations for each volcano exist in both major and trace elements. Trace element geochemistry is typical of island arc volcanism. Compared to KGV lavas all studied rocks form very narrow trends in all major element diagrams, which almost do not overlap with the fields of other KGV volcanoes. The lavas are relatively poor in alkalis, TiO2, P2O5, FeO, Ni, Zr, and enriched in SiO2 compared to other KGV volcanics and show greater geochemical and petrological evidence of magmatic differentiation during shallow crustal processing. Basement samples of the Udinskoe plateau lavas to the east of Bolshaya Udina volcano have similar geochemical composition (trace element enriched high-K basaltic andesites and andesites) and similar eruption age of 274 ka [Calkins et al., 2004] as typical plateau lavas below the northern KGV. This research was supported by RFBR-DFG grant # 16-55-12040.
Flerov G.B., Churikova T.G., Anan'ev V.V. The Ploskie Sopki volcanic massif: Geology, petrochemistry, mineralogy, and petrogenesis (Klyuchevskoi Volcanic Cluster, Kamchatka) // Journal of Volcanology and Seismology. 2017. Vol. 11. Vol. 4. P. 266-284. doi: 10.1134/S0742046317040030.
This paper is concerned with the geological history and petrology of a major polygenic volcanic edifice dating back to Upper Pleistocene to Holocene time. This long-lived volcanic center is remarkable in that it combines basaltic and trachybasaltic magmas which are found in basaltic andesite and trachybasaltic– trachyandesite series. The inference is that the coexisting parent magmas are genetically independent and are generated at different sources at depth in an upper mantle volume. The associated volcanic rocks have diverse compositions, stemming from a multi-stage spatio–temporal crystallization differentiation of the magmas and mixing of these in intermediate chas.
Girina O.A., Manevich A.G., Melnikov D.V., Nuzhdaev A.A., Petrova E. Kamchatka and North Kurile Volcano Explosive Eruptions in 2016 and Danger to Aviation // JpGU-AGU Joint Meeting 2017 Abstracts. Chiba, Japan: Japan Geoscience Union. 2017.