Главная БиблиографияПо дате публикаций
 
 Библиография
Вулкан: Расширенный поиск

Выбрать:
Количество записей: 1755
Страницы:  1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88
 2017
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. V. 19. P. EGU2017-10691.    Аннотация
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.
Gordeychik Boris, Churikova Tatiana, Kronz Andreas, Simakin Alexander, Wörner Gerhard Olivine zoning in high-Mg basalts of the Shiveluch volcano (Kamchatka) // Geophysical Research Abstracts. 2017. V. 19. P. EGU2017-10473.    Аннотация
Shiveluch volcano located in northern Kamchatka erupted mainly high-Mg andesites during Holocene times. However, tephrochronologists found two Holocene tephra layers that are unusual for this volcano: a high-Mg middle-K basalts with an age of 7600 yr BP and high-Mg high-K basalt with an age of 3600 yr BP [Volynets et al, 1997]. The proximal outcrops for these two tephra deposits were discovered just recently [Churikova et al., 2010; Gorbach & Portnyagin, 2011]. Our study of olivines from the high-Mg basalts documents unusual Mg-Fe zonation [Gordeychik et al., 2016]: Inner cores of olivines from both eruptions show Fo87-92, falling to the rim to Fo75-85. In the outer cores of both basalt tephra, forsterite decreases linearly abruptly changing to a steeper gradient towards the rim. Electron microprobe element maps reveal the complex and highly unusual zoning features of these olivines.
The inner cores of the olivines of 7600 yr BP tephra have bell-shaped distributions for forsterite and nickel. The maximum forsterite in their core can be up to Fo92, decreasing outward to the outer core to Fo86. At the same time, the trace elements in the inner core remain constant. Such element distribution is consistent with diffusion of Fe, Mg, and Ni in the initially uniform high Mg cores after the phenocrysts were changed to non-equilibrium in a less mafic melt. The shape of the inner cores suggests partial dissolution after magma mixing. The interfaces between the inner and outer cores are marked by abundant melt/fluid inclusions. The inner cores were overgrown by olivine with Fo90 when the crystals moved to the high-Mg melt. As result some olivine grains have the maximum forsterite values in the outer core. The specific feature of the olivine outer cores from basalt of the 7600 yr BP tephra eruption are concentric zones with higher values of Ca, Cr, Al, P. One of the crystals has five distinct growth zones with high Cr concentrations. The width of these zones can be only a few microns and thus such zones are often missed in typical quantitative point measurements in microprobe profiles.
Inner cores of olivines from the 3600 yr BP tephra are uniform in forsterite and nickel. However, Al and Ca element distribution maps show in inner cores higher concentrations with rather smooth contours. This suggests that initially the olivines were formed from high-Al and high-Ca melt, then were dissolved and the overgrowth zonation has been smoothed out due to faster Mg-Fe diffusion. Only Ca and Al with low diffusivity were conserved. The concentric zones with higher element concentrations are not so well expressed in olivines from the 3600 yr BP tephra, but some distinct growth zones are also shown in Ca, Cr, and P.
Information extraction and decoding of the elemental maps allow seeing highly complex growth-dissolutiondiffusion history of magma mixing processes prior to eruption. This research was supported by RFBR-DFG grant # 16-55-12040.
Melnikov Dmitry, Malik Nataliya, Chaplygin Ilya, Zelenski Mikhail First data on the volatile fluxes from passively degassing volcanoes of the Kuril Island arc // EGU General Assembly 2017. 2017. V. 19.
Гирина О.А., Маневич А.Г., Мельников Д.В., Нуждаев А.А., Демянчук Ю.В. Активность вулканов Камчатки и Северных Курил в 2016 г. по данным KVERT // Материалы XX региональной научной конференции «Вулканизм и связанные с ним процессы», посвящённой Дню вулканолога, 30-31 марта 2017 г. Петропавловск-Камчатский: ИВиС ДВО РАН. 2017. С. 7-10.
Гирина О.А., Мельников Д.В., Демянчук Ю.В., Маневич А.Г. Извержение вулкана Безымянный в 2016-2017 гг. по данным KVERT // Материалы XX региональной научной конференции «Вулканизм и связанные с ним процессы», посвящённой Дню вулканолога, 30-31 марта 2017 г. Петропавловск-Камчатский: ИВиС ДВО РАН. 2017. С. 14-17.
Гирина О.А., Мельников Д.В., Маневич А.Г., Нуждаев А.А., Демянчук Ю.В. Хронология событий извержения влк. Ключевской в 2016 г. по данным KVERT // Материалы XX региональной научной конференции «Вулканизм и связанные с ним процессы», посвящённой Дню вулканолога, 30-31 марта 2017 г. Петропавловск-Камчатский: ИВиС ДВО РАН. 2017. С. 18-21.
Гордейчик Б.Н., Чурикова Т.Г., Бергаль-Кувикас О.В., Кронц А., Симакин А.Г., Вёрнер Г. Использование Fe-Mg зональности в оливинах для расчетов скоростей подъема и времени эволюции магмы до извержения (первые результаты российско-немецкого проекта по изучению оливинов в камчатских базальтах) // Вулканизм и связанные с ним процессы. Материалы XX региональной научной конференции, посвящённой Дню вулканолога. Петропавловск-Камчатский, 30-31 марта 2017 г.. Петропавловск-Камчатский: ИВиС ДВО РАН. 2017. С. 30-33.
Козлов Д.Н., Дегтерев А.В., Рыбин А.В., Коротеев И.Г., Климанцов И.М., Чаплыгин О.В., Чаплыгин И.В. Первые результаты батиметрической съемки вулканического озера Кольцевое (о. Онекотан, Северные Курильские острова) // Вестник КРАУНЦ. Серия: Науки о Земле. 2017. Вып. 33. № 1. С. 89-95.    Аннотация
В работе приводятся первые результаты батиметрической съемки вулканического озера Кольцевое (о. Онекотан, Северные Курильские острова). Описаны его основные морфологические элементы и морфометрические параметры, представлена батиметрическая схема.

The paper provides preliminary results from the bathymetric studies of Koltsevoye volcanic lake (Onekotan Island, the Northern Kuriles). We describe the main morphological and morphometric parameters and represent a bathymetric scheme.
Малик Н.А., Зеленский М.Е., Округин В.М. Температура и состав газа фумарол вулкана Авачинский (Камчатка) в 2013−2016 гг. // Вестник КРАУНЦ. Серия: Науки о Земле. 2017. Вып. 33. № 1. С. 21-33.    Аннотация
Представлены данные режимных наблюдений за температурой и составом фумарольных газов вулкана Авачинский в 2013−16 гг. Показана динамика температур высокотемпературных фумарол за этот период ― Западной и расположенных на Восточном поле, приуроченных к трещине, возникшей в лавовой «пробке» в результате слабой эксплозивной активизации вулкана осенью 2001 г. На Западной фумароле зарегистрирована температура 818°С ― самая высокая из когда-либо измеренных на вулкане Авачинский. Изучен состав газов режимной фумаролы Восточного поля и его вариации во времени. Проведен сравнительный анализ с данными предшествующих наблюдений за газами вулкана Авачинский и других активных вулканов Камчатки, а также со средними значениями для вулканов зон субдукции.

The article presents data on Avachinsky Volcano fumaroles' temperature and gas composition obtained during the 2013-2016 observations and shows temperature dynamics over this period of the high-temperature Western fumarole and Eastern fumarolic field assigned to the fissure appeared in lava «plug» as a result of the weak explosive eruption in autumn 2001. Temperature of 818°С was registered in the Western fumarole to be the highest ever measured at Avachinsky Volcano. Gas composition of the monitored fumarole on Eastern field and its variation in time were studied. We compared the obtained data with the previous data on gas observations from Avachinsky Volcano and other active volcanoes in Kamchatka and the data on the average values from the volcanoes of the subduction zones.
Мельников Д.В., Маневич А.Г., Гирина О.А. Алгоритм автоматического анализа спутниковых снимков MODIS для мониторинга активности вулканов Камчатки и Курильских островов // Материалы XX региональной научной конференции «Вулканизм и связанные с ним процессы», посвящённой Дню вулканолога, 30-31 марта 2017 г. Петропавловск-Камчатский: ИВиС ДВО РАН. 2017. С. 62-65.
Рыбин А.В., Чибисова М.В., Дегтерев А.В. Активность вулканов Курильских островов в 2016 г. // Вестник КРАУНЦ. Серия: Науки о Земле. 2017. Вып. 33. № 1. С. 83-88.    Аннотация
Приводятся данные, характеризующие активность вулканов Курильских островов в 2016 г. Рассмотрены извержения вулканов Алаид (о. Атласова), Эбеко, Чикурачки (о. Парамушир), Чиринкотан (о. Чиринкотан,) и Сноу (о. Чирпой).

The paper presents data describing volcanic activity in the Kuril Islands in 2016. The eruptions of Alaid (Atlasova Island), Ebeko, Chikurachki ( Paramushir Island), Chirinkotan (Chirinkotan Island) and Snow (Chirpoi Island) volcanoes are considered.
Чебров Д.В., Фирстов П.П., Сенюков С.Л., Близнецов В.Е., Воропаев П.В., Гарбузова В.Т., Дрознина С.Я., Кожевникова Т.Ю., Кугаенко Ю.А., Назарова З.А., Нуждина И.Н., Салтыков В.А., Серафимова Ю.К., Сероветников С.С., Соболевская О.В. Активность вулкана Безымянный (Камчатка) в 2016−2017 гг. // Вестник КРАУНЦ. Серия: Науки о Земле. 2017. Вып. 33. № 1. С. 5-11.    Аннотация
О системе сбора и обработки сейсмологической информации КФ ФИЦ ЕГС РАН

About activity of Bezymianny Volcano, Kamchatka, in 2016−2017.
 2016
Girina O.A., Gordeev E.I. Kamchatkan Volcanic Eruption Response Team (KVERT), Russia // Modern Information Technologies in Earth Sciences. Proc. of the VI International Conference, Yuzhno-Sakhalinsk, August 7-11, 2016. Vladivostok: Dalnauka. 2016. P. 29
Girina O.A., Melnikov D.V., Manevich A.G., Demyanchuk Yu.V., Nuzhdaev A.A., Petrova E. Kamchatka and North Kurile Volcano Explosive Eruptions in 2015 and Danger to Aviation // Geophysical Research Abstracts Vol. 18, EGU2016-2101, 2016 EGU General Assembly 2016. EGU General Assembly 2016. 2016. doi: 10.13140/RG.2.1.5179.4001.
Gordeev E.I., Girina O.A., Lupyan E.A., Sorokin A.A., Kramareva L.S., Efremov V.Yu., Kashnitskii A.V., Uvarov I.A., Burtsev M.A., Romanova I.M., Mel’nikov D.V., Manevich A.G., Korolev S.P., Verkhoturov A.L. The VolSatView information system for Monitoring the Volcanic Activity in Kamchatka and on the Kuril Islands // Journal of Volcanology and Seismology. 2016. V. 10. № 6. P. 382-394. doi: 10.1134/S074204631606004X.    Аннотация
Kamchatka and the Kuril Islands are home to 36 active volcanoes with yearly explosive eruptions that eject ash to heights of 8 to 15 km above sea level, posing hazards to jet planes. In order to reduce the risk of planes colliding with ash clouds in the north Pacific, the KVERT team affiliated with the Institute of Volcanology and Seismology of the Far East Branch of the Russian Academy of Sciences (IV&S FEB RAS) has conducted daily satellite-based monitoring of Kamchatka volcanoes since 2002. Specialists at the IV&S FEB RAS, Space Research Institute of the Russian Academy of Sciences (SRI RAS), the Computing Center of the Far East Branch of the Russian Academy of Sciences (CC FEB RAS), and the Far East Planeta Center of Space Hydrometeorology Research (FEPC SHR) have developed, introduced into practice, and were continuing to refine the VolSatView information system for Monitoring of Volcanic Activity in Kamchatka and on the Kuril Islands during the 2011–2015 period. This system enables integrated processing of various satellite data, as well as of weather and land-based information for continuous monitoring and investigation of volcanic activity in the Kuril–Kamchatka region. No other information system worldwide offers the abilities that the Vol-SatView has for studies of volcanoes. This paper shows the main abilities of the application of VolSatView for routine monitoring and retrospective analysis of volcanic activity in Kamchatka and on the Kuril Islands.
Gordeev E.I., Girina O.A., Manevich A.G., Melnikov D.V., Nuzhdaev A.A. 2015-2016 Activity of Kamchatkan and Northern Kuriles Volcanoes (Russia) and Danger to Aviation // 9th Biennial Workshop on Japan-Kamchatka-Alaska Subduction Processes (JKASP 2016). Fairbanks, Alaska: UAF. 2016. P. 93-94.
Gordeev E.I., Loupian E.A., Girina O.A., Sorokin A.A. VolSatView Information System Capabilities for Studying Kamchatka and Northern Kuriles Volcanic Activity // Modern Information Technologies in Earth Sciences. Proc. of the VI International Conference, Yuzhno-Sakhalinsk, August 7-11, 2016. Vladivostok: Dalnauka. 2016. P. 19
Gordeychik Boris, Churikova Tatiana, Kronz Andreas, Simakin Alexander, Wörner Gerhard First data on magma ascent and residence times retrieved from Fe-Mg and trace element zonation in olivine phenocrysts from Kamchatka basalts // Geophysical Research Abstracts. 2016. V. 18. P. EGU2016-12839.    Аннотация
Compositional zonation in olivine phenocrysts and diffusion modelling have been used in the last ten years to estimate magma residence times and the duration of magma ascent. The fundamental assumption is that mixing with newly injected magma into a reservoir triggers diffusional exchange between mafic olivine crystals and more evolved magma and that this magma mixing eventually triggers eruption. If depth of mixing is known, this translates to ascent rates of magmas to the surface. We applied this approach to a series of different arc basalt lavas from Kamchatka to constrain the rates of magma ascent and magma resident in what is one of the most active subduction zones in the world that is also dominated by an abundance of unusually mafic magmas. Our sample collection cover the principal modes of arc magmatism in Kamchatka: from different volcanic complexes (stratovolcano, dikes, summit eruptions, monogenetic cones), of different age (from Late-Pleistocene to Holocene and recent eruptions), from different magmatic regimes (long-lived volcanoes vs. monogenetic eruptions) and different major element composition (from basalt to basaltic andesite of different geochemical character including LILE enrichments). We analyzed and modelled zonation profiles for a range of elements with different diffusivities (e.g. Mg-Fe, Ca, Ni, Mn, Cr) to assess the role of variable diffusivities as a function of major and trace elements in the olivines from different P-T conditions. First data were obtained on samples from the Klyuchevskoy, Shiveluch and Tolbachik, including recent most eruption in 2012/2013. These data show that for some samples the zonation patterns are much more complex than is usually observed: high-Mg olivines at different volcanoes have very different zonation patterns, including normally, reversely zoned grains or even show highly complex repetitive zonation that indicate large compositional changes in the surrounding magma at very short time scales (years). Thus in some Kamchatka basalts, we observe unusual Mg-Fe zonations that are linked to complex mixing, possibly resorption and subsequent crystal growth processes that are generally not preserved due to fast diffusion of Mg-Fe. Based on a first assessment of our measured profiles, the values for diffusion times in Fo-rich olivines (88 to 92% Fo) vary from only a few months to years and thus magma ascent from deep magma sources must have been fast.
Kalacheva Elena, Taran Yuri, Kotenko Tatiana, Hattori Keiko, Kotenko Leonid, Solis-Pichardo Gabriela Volcano–hydrothermal system of Ebeko volcano, Paramushir, Kuril Islands: Geochemistry and solute fluxes of magmatic chlorine and sulfur // Journal of Volcanology and Geothermal Research. 2016. V. 310. P. 118-131. doi:10.1016/j.jvolgeores.2015.11.006.    Аннотация
Ebeko volcano at the northern part of Paramushir Island in the Kuril island arc produces frequent phreatic eruptions and relatively strong fumarolic activity at the summit area ~ 1000 m above sea level (asl). The fumaroles are characterized by low-temperature, HCl- and S-rich gas and numerous hyper-acid pools (pH < 1) without drains. At ~ 550 m asl, in the Yurieva stream canyon, many hot (up to 87 °C) springs discharge ultra-acidic (pH 1–2) SO4–Cl water into the stream and finally into the Sea of Okhotsk. During quiescent stages of degassing, these fumaroles emit 1000–2000 t/d of water vapor, < 20 t/d of SO2 and < 5 t/d of HCl. The measurement of acidic hot Yurieva springs shows that the flux of Cl and S, 60–80 t/d each, is independent on the volcanic activity in the last two decades. Such high flux of Cl is among the highest ever measured in a volcano–hydrothermal system. Oxygen and hydrogen isotopic composition of water and Cl concentration for Yurieva springs show an excellent positive correlation, indicating a mixing between meteoric water and magmatic vapor. In contrast, volcanic gas condensates of Ebeko fumaroles do not show a simple mixing trend but rather a complicated data suggesting evaporation of the acidic brine. Temperatures calculated from gas compositions and isotope data are similar, ranging from 150 to 250 °C, which is consistent with the presence of a liquid aquifer below the Ebeko fumarolic fields. Saturation indices of non-silicate minerals suggest temperatures ranging from 150 to 200 °C for Yurieva springs. Trace elements (including REE) and Sr isotope composition suggest congruent dissolution of the Ebeko volcanic rocks by acidic waters. Waters of Yurieva springs and waters of the summit thermal fields (including volcanic gas condensates) are different in Cl/SO4 ratios and isotopic compositions, suggesting complicated boiling–condensation–mixing processes.
Khubunaya S.A., Eremina T.S., Sobolev A.V. The classification of potassium basaltic trachyandesites that were discharged by the 2012–2013 parasitic eruption on Ploskii Tolbachik Volcano, Kamchatka using geochemical criteria // Journal of Volcanology and Seismology. 2016. V. 10. № 1. P. 33-49. doi: 10.1134/S0742046316010024.    Аннотация
Abstract—This study is concerned with the petrographic, mineralogic, and geochemical features in the K-high basaltic trachyandesites that were discharged by the 2012–2013 parasitic eruption on Ploskii Tolbachik Volcano. These K-high basaltic trachyandesites exhibit some obvious characteristics that testify to their suprasubduction origin. They are deeply differentiated rocks with strongly fractionated plagioclase.A study of the Sr, Nd, and Pb radiogenic isotope ratios in the K-high basaltic trachyandesites provided evidence of their mantle origin and of the fact that the crust has exerted no influence on their compositions. We performed a comparative analysis of the ratios of the concentrations for some incoherent elements in the K-high basaltic trachyandesites, as well as in intraplate, riftogenic, and island-arc moderate potassium basalts and basaltic andesites in relation to the concentrations of these elements in the primitive mantle. The geochemical features of these K-high basaltic trachyandesites classify them as belonging to the suprasubduction subalkaline formation of the potassium series.

Изучены петрографические, минералогические и геохимические особенности К-трахиандезибазальтов побочного извержения 2012–2013 гг. вулкана Плоский Толбачик. К-трахиандезибазальты имеют явные признаки надсубдукционного происхождения. Это глубоко дифференцированные породы, характеризующиеся значительным фракционированием плагиоклаза. Изучение радиогенных изотопных отношений Sr, Nd и Pb в К-трахиандезибазальтах свидетельствует об их мантийном происхождении и отсутствии влияния земной коры на их составы. Проведен сравнительный анализ отношений содержаний некогерентых элементов в К-трахиандезибазальтов,внутриплитных,рифтогенных и островодужных умереннокалиевых базальтах и андезибазальтах к содержанию этих элементов в примитивной мантии. Геохимические особенности К-трахиандезибазальтов позволяют отнести их к надсубдукционной субщелочной формации калиевого ряда.
http://repo.kscnet.ru/2626/ [связанный ресурс]





 

Рекомендуемые браузеры для просмотра данного сайта: Google Chrome, Mozilla Firefox, Opera, Yandex. Использование другого браузера может повлечь некорректное отображение содержимого веб-страниц.
 
Условия использования материалов и сервисов Геопортала

Copyright © Институт вулканологии и сейсмологии ДВО РАН, 2010-2017. Пользовательское соглашение.
Любое использование либо копирование материалов или подборки материалов Геопортала может осуществляться лишь с разрешения правообладателя и только при наличии ссылки на geoportal.kscnet.ru
 
©Design: roman@kscnet.ru