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 C
Constraints on mantle melting and composition and nature of slab components in volcanic arcs from volatiles (H2O, S, Cl, F) and trace elements in melt inclusions from the Kamchatka Arc (2007)
Portnyagin Maxim, Hoernle Kaj, Plechov Pavel, Mironov Nikita, Khubunaya Sergey Constraints on mantle melting and composition and nature of slab components in volcanic arcs from volatiles (H2O, S, Cl, F) and trace elements in melt inclusions from the Kamchatka Arc // Earth and Planetary Science Letters. 2007. Т. 255. № 1-2. С. 53-69. doi:10.1016/j.epsl.2006.12.005.
Constraints on unrest in the Tolbachik volcanic zone in Kamchatka prior the 2012–13 flank fissure eruption of Plosky Tolbachik volcano from local seismicity and GPS data (2015)
Kugaenko Yulia, Titkov Nikolay, Saltykov Vadim Constraints on unrest in the Tolbachik volcanic zone in Kamchatka prior the 2012–13 flank fissure eruption of Plosky Tolbachik volcano from local seismicity and GPS data // Journal of Volcanology and Geothermal Research. 2015. V. 307. P. 38 - 46. doi: 10.1016/j.jvolgeores.2015.05.020.    Аннотация
Abstract A new fissure eruption began on 27 November 2012 on the southern slope of Plosky Tolbachik volcano, which is located in central Kamchatka, Russia, and is part of the Klyuchevskoy volcano group. We analyzed the displacement of the earth surface and the seismicity during several months before the eruption onset. According to seismic and GPS data the eruption was preceded by about 4–5 months (July–November 2012) of synchronous crustal deformation and seismicity. The seismic anomaly comprises low energy level seismicity (mainly M = 1.2–2.3) under Plosky Tolbachik volcano at a depth of less than 5 km. In the 2–3 weeks immediately preceding the eruption the rate of seismicity and the amount of radiated seismic energy exceeded the long-term average values (2000–2011) by more than 40 times. The deformation anomaly was recorded by displacement of the GPS points at distances from 20 to 60 km to the north of Tolbachik. The principal axis of the compressive strain was approximately directed towards the Tolbachik eruption site. The permanent GPS network detected radial compression and tangential stretching. The compressive strain reached about 10− 7 prior to eruption onset. The comparable duration of seismic and deformation anomalies (~ 4–5 months before the eruption) is consistent with a common origin, connected to magma rising from depth, and is interpreted as indicating that they were medium-term precursors to the eruption. Data recorded during this unrest episode of the Tolbachik volcanic zone will contribute to understanding of the reawakening of volcanic activity in this region and others worldwide with similar characteristics.
Convective Differentiation of Pyroclastic from Andesitic Volcanoes (1995)
Girina O.A. Convective Differentiation of Pyroclastic from Andesitic Volcanoes // IUGG. XXI General Assembly. Colorado. 1995. P. B 419
Coupling eruption and tsunami records: the Krakatau 1883 case study, Indonesia (2014)
Paris Raphaël, Wassmer Patrick, Lavigne Franck, Belousov Alexander, Belousova Marina, Iskandarsyah Yan, Benbakkar Mhammed, Ontowirjo Budianto, Mazzoni Nelly Coupling eruption and tsunami records: the Krakatau 1883 case study, Indonesia // Bulletin of Volcanology. 2014. V. 76. № 4. doi:10.1007/s00445-014-0814-x.
Crustal Deformations Related to the Formation of New Tolbachik Volcanoes in 1975-1976, Kamchatka (1980)
Fedotov S.A. Crustal Deformations Related to the Formation of New Tolbachik Volcanoes in 1975-1976, Kamchatka // Bulletin Volcanologique. 1980. V. 43. № 1. P. 35-46.    Аннотация
The paper discusses the results of geodetic investigations performed in the region of the large 1975-1976 Tolbachik fissure eruption in Kamchatka. Using data from repeated triangu-lation and trigonometric levelings, horizontal and vertical displacements have been detected in an area of 3,500 km2. Two zones have been recognized: the tension and uplift zone that is probably due to magma intrusion from depths to the surface along the line of new cones and the extensive compensative subsidence zone located at a distance of 20-50 km from the nearest newly-formed cones.??Measurements made with small distance measuring device showed the dynamics of feeding basalt dykes intrusion and made it possible to determine their width (a little greater than 1 m) and magma and gas overpressure (50-250 bar). Data have been obtained on dimensions and growth of cones and on vertical ground deformation in the area of new cones during and after the eruption.??
Cервис-ориентированный программный интерфейс доступа к удаленным источникам данных для проведения междисциплинарных исследований вулканов Камчатки (2016)
Королев С.П., Сорокин А.А., Урманов И.П., Гирина О.А., Романова И.М. Cервис-ориентированный программный интерфейс доступа к удаленным источникам данных для проведения междисциплинарных исследований вулканов Камчатки // Сборник тезисов докладов. Четырнадцатая Всероссийская Открытая конференция «Современные проблемы дистанционного зондирования Земли из космоса», ИКИ РАН 14–18 ноября 2016 г. М.: ИКИ РАН. 2016. С. 94
 D
Debris avalanche of the 1956 Bezymianny eruption (1988)
Белоусов А.Б., Богоявленская Г.Е. Debris avalanche of the 1956 Bezymianny eruption // Kagoshima International Conference on Volcanoes: Proceedings of the International Conference on Volcanoes, Japan, Kagoshima, 19-23 July 1988. Kagoshima: Kagoshima Prefectural Government. 1988. P. 460-462.
Decoding crystal fractionation in calc-alkaline magmas from the Bezymianny Volcano (Kamchatka, Russia) using mineral and bulk rock compositions (2013)
Almeev Renat R., Kimura Jun-Ichi, Ariskin Alexei A., Ozerov Alexey Yu. Decoding crystal fractionation in calc-alkaline magmas from the Bezymianny Volcano (Kamchatka, Russia) using mineral and bulk rock compositions // Journal of Volcanology and Geothermal Research. 2013. V. 263. P. 141 - 171. doi: 10.1016/j.jvolgeores.2013.01.003.    Аннотация
We present a new dataset for whole-rock major, trace, isotopic, and phenocryst compositions indicating a genetic link between andesites of the Holocene eruptions of the Bezymianny stratovolcano (the Bezymianny stage), the andesitic to dacitic Late Pleistocene lava dome complex (the pre-Bezymianny stage), and the magnesian to high-alumina basalts of the adjacent Kliuchevskoi Volcano. We demonstrate that volcanic products from the Bezymianny stage of volcano evolution are most likely the products of magma mixing between silicic products of the earliest stages of magma fractionation and the less evolved basaltic andesite parental melts periodically injected into the magma reservoir. In contrast, the intermediate and silicic magmas of the pre-Bezymianny stage together with basalts from Kliuchevskoi much more closely resemble the liquid line of descent and may represent a unique prolonged and continuous calc-alkaline trend of magma evolution from high-magnesian basalt to dacite. As a result of the geothermobarometry, we recognize variable conditions of magma fractionation and magma storage beneath Bezymianny for different magma types during its evolution since the Late Pleistocene: (1) 1100–1150 °C, 500–640 MPa, 1–2.5 wt. H2O for parental basaltic andesite; (2) 1130–1050 °C, 700–600 MPa, 2.5–5 wt. H2O for two-pyroxene andesites; (3) 1040–990 °C, 560–470 MPa, 5–6.5 wt. H2O for orthopyroxene-bearing andesites; (4) 950–1000 °C, 450–150 MPa, 3.5–5.5 wt. H2O for hornblende-bearing andesites; and (5) 950–900 °C, 410–250 MPa, 6–7 wt. H2O for dacites. Repeated basalt injections and magma fractionation combined with internal mixing in the magma chamber are the main processes responsible for both the complex petrography and the geochemical trends observed in the lavas of Bezymianny Volcano.
Deformations and earthquakes of Kliuchevskoi Volcano: a model of its activity (1987)
Fedotov S.A., Gorelchik V.I., Zharinov N.A. Deformations and earthquakes of Kliuchevskoi Volcano: a model of its activity // Comptes rendus of the XIX General Assembly of the I.U.G.G.: Vancouver, August 9-22, 1987. 1987. V. 2. P. 392
Deposits of the 30 March 1956 directed blast at Bezymianny volcano, Kamchatka, Russia (1996)
Belousov Alexander Deposits of the 30 March 1956 directed blast at Bezymianny volcano, Kamchatka, Russia // Bulletin of Volcanology. 1996. V. 57. № 8. P. 649-662. doi:10.1007/s004450050118.
Deposits, character and timing of recent eruptions and gravitational collapses in Tatun Volcanic Group, Northern Taiwan: Hazard-related issues (2010)
Belousov Alexander, Belousova Marina, Chen Chang-Hwa, Zellmer Georg F. Deposits, character and timing of recent eruptions and gravitational collapses in Tatun Volcanic Group, Northern Taiwan: Hazard-related issues // Journal of Volcanology and Geothermal Research. 2010. V. 191. № 3-4. P. 205-221. doi:10.1016/j.jvolgeores.2010.02.001.
Detection of a new summit crater on Bezymianny Volcano lava dome: satellite and field-based thermal data (2007)
Carter Adam J., Ramsey Michael S., Belousov Alexander B. Detection of a new summit crater on Bezymianny Volcano lava dome: satellite and field-based thermal data // Bulletin of Volcanology. 2007. V. 69. № 7. P. 811-815. doi:10.1007/s00445-007-0113-x.
Determination of the explosion energy in some volcanoes according to barograms (1960)
Gorshkov G.S. Determination of the explosion energy in some volcanoes according to barograms // Bulletin Volcanologique, organe de IAV. 1960. V. 23. V. 2. P. 141-144.
Dike model for the 2012–2013 Tolbachik eruption constrained by satellite radar interferometry observations (2015)
Lundgren Paul, Kiryukhin Alexey, Milillo Pietro, Samsonov Sergey Dike model for the 2012–2013 Tolbachik eruption constrained by satellite radar interferometry observations // Journal of Volcanology and Geothermal Research. 2015. V. 307. P. 79 - 88. doi: 10.1016/j.jvolgeores.2015.05.011.    Аннотация
Abstract A large dike intrusion and fissure eruption lasting 9 months began on November 27, 2013, beneath the south flank of Tolbachik Volcano, Kamchatka, Russia. The eruption was the most recent at Tolbachik since the Great Tolbachik Eruption from 1975 to 1976. The 2012 eruption was preceded by more than 6 months of seismicity that clustered beneath the east flank of the volcano along a NW–SE trend. Seismicity increased dramatically before the eruption, with propagation of the seismicity from the central volcano conduit in the final hours. We use interferometric synthetic aperture radar (InSAR) to compute relative displacement images (interferograms) for {SAR} data pairs spanning the eruption. We use satellite {SAR} data from the Canadian Space Agency's RADARSAT-2 and from the Italian Space Agency's COSMO-SkyMed missions. Data are modeled first through a Markov Chain Monte Carlo solution for a single tensile dislocation (dike). We then use a boundary element method that includes topography to model a distributed dike-opening model. We find the best-fitting dike dips 80° to the {WNW} with maximum opening of 6–8 m, localized in the near surface and more broadly distributed in distinct regions up to 3 km beneath the surface, which varies from 1 to 2 km elevation for the eruptive fissures. The distribution of dike opening and its correspondence with co-diking seismicity suggests that the dike propagated radially from Tolbachik's central conduit.
Directed blasts and blast-generated pyroclastic density currents: a comparison of the Bezymianny 1956, Mount St Helens 1980, and Soufrière Hills, Montserrat 1997 eruptions and deposits (2007)
Belousov Alexander, Voight Barry, Belousova Marina Directed blasts and blast-generated pyroclastic density currents: a comparison of the Bezymianny 1956, Mount St Helens 1980, and Soufrière Hills, Montserrat 1997 eruptions and deposits // Bulletin of Volcanology. 2007. V. 69. № 7. P. 701-740. doi:10.1007/s00445-006-0109-y.
Directed volcanic blasts (1963)
Gorshkov G.S. Directed volcanic blasts // Bulletin Volcanologique. 1963. V. 26. P. 83-88.
Discriminations in Generation of pyroclastic deposit types from andesitic volcanoes of Kamchatka (in the Bezymianny volcano case) (1995)
Bogoyavlenskaya G.E., Girina O.A. Discriminations in Generation of pyroclastic deposit types from andesitic volcanoes of Kamchatka (in the Bezymianny volcano case) // IUGG. XXI General Assembly. Colorado. 1995. P. B 410
Distribution and eruptive mechanism of maars in the Kamchatka Peninsula (2006)
Belousov A. B. Distribution and eruptive mechanism of maars in the Kamchatka Peninsula // Doklady Earth Sciences. 2006. V. 406. № 1. P. 24-27. doi:10.1134/S1028334X06010077.
Dynamic of the lava flows during the Tolbachik Fissure eruption in 2012-2013 (Kamchatka) inferred from the satellite and ground-based observations (2014)
Melnikov Dmitry, Harris Andrew, Volynets Anna, Belousov Alexander, Belousova Marina Dynamic of the lava flows during the Tolbachik Fissure eruption in 2012-2013 (Kamchatka) inferred from the satellite and ground-based observations // EGU General Assembly 2014. 2014, Vienna, Austria. 2014.    Аннотация
Fissure eruption on the slope of Plosky Tolbachik volcano continued from November 27th, 2012 until September
2013. It was named as The Institute of Volcanology and Seismology 50th Anniversary Fissure Tolbachik Eruption.
The eruption started from the 5 km-long fissure opening and continued with the intensive lava effusion from it.
During the first two days of eruption the length of the lava flows was 9 km, and lava covered the area of 14.4
km2 (Gordeev et al., 2013). Lava discharge rate at this period was about 400 m3/sec. Two eruptive centers were
formed on the fissure – upper (Menyailov vent) and lower (Naboko vent), and lava gushed from them to the height
up to 200-300 meters. On December 1st, the Menyailov vent activity ceased, and the eruption concentrated at the
Naboko vent. Cinder cone was formed here, and lava flows effused from the base of the cone. Lava erupted from
the Menyailov vent, is different from the Naboko vent lava by higher silica content (SiO2 55.35 wt.% vs. 52.5
wt.%, respectively). That may be caused by the discharge of two levels of the magma chamber, fractionated to
a different extent. Morphologically, lava flows from the beginning of eruption until April 2013 were dominantly
aa-lava type, and from April until September 2013 pahoehoe type dominated.
For distinguishing of the dynamic of the lava flows the following methods were applied. As remote sensing methods
we used different satellite data – for specification of the area covered by lava flows, their length, temperature we
used Landsat 7 ETM+, Landsat 8, ASTER, EO-1 ALI and HYPERION. For time averaged discharge rate (TADR)
and lava flow area determination we used AVHRR data. We detected that in December 2013 lava discharge rate
varied from 120 to 40 m3/sec, and then it gradually decreased to average values 5-15 m3/sec and remained on this
level until the end of eruption. These data are confirmed by the ground-based observations, which were conducted
during the entire period of eruption. At the end of eruption in September 2013, lava flows area was about 36 km2, the maximum length of the lava flow – 15 km.
Dynamics of the 1800 14C yr BP caldera-forming Eruption of Ksudach Volcano, Kamchatka, Russia (2007)
Andrews B.J., Gardner J.E., Tait S., Ponomareva V.V., Melekestsev I.V. Dynamics of the 1800 14C yr BP caldera-forming Eruption of Ksudach Volcano, Kamchatka, Russia // Geophysical Monograph Series. // Volcanism and Subduction: The Kamchatka Region. 2007. V. 172. P. 325-342. № doi:10.1029/172GM23.    Аннотация
The 1800 14C yr BP Ksudach KS1 rhyodacite deposits present an opportunity to study the effects of caldera collapse on eruption dynamics and behavior. Stratigraphic relations indicate four Phases of eruption, Initial, Main, Lithic, and Gray. Well-sorted, reverse-graded pumice fall deposits overlying a silty ash compose the Initial Phase layers. The Main, Lithic, and Gray Phases are represented by pumice fall layers interbedded with pyroclastic flow and surge deposits (proximally) and co-ignimbrite ashes (distally). Although most of the deposit is <30 wt.% lithics, the Lithic Phase layers are >50 wt.% lithics. White and gray pumice are compositionally indistinguishable, however vesicle textures and microlite populations indicate faster ascent by the white pumice prior to eruption of the Gray Phase. The eruption volume is estimated as ∼8.5 km3 magma (dense rock equivalent) and ∼3.6 km3 lithics. Isopleth maps indicate mass flux ranged from 5–10×10^7 kg/s during the Initial Phase to >10^8 kg/s during the Main, Lithic, and Gray Phases. Caldera Collapse during the Lithic Phase is reflected by a large increase in lithic particles and the abrupt textural change from white to gray pumice; collapse began following eruption of ∼66% of the magma, and finished when ∼72% of the magma was erupted. Stratigraphic, granulometric, and component analyses indicate simultaneous eruption of buoyant plumes and non-buoyant flows during the Main, Lithic, and Gray Phases. Although mass flux did not change significantly following caldera collapse, the Gray Phase of eruption was dominated by non-buoyant flows in contrast to the earlier Phases that erupted mostly buoyant plumes.





 

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