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 P
Plagioclase lapilli and phenocrysts in the lavas of the 2012-2013 Tolbachik Fissure eruption (2014)
Volynets Anna, Melnikov Dmitry, Griboedova Irina Plagioclase lapilli and phenocrysts in the lavas of the 2012-2013 Tolbachik Fissure eruption // 8-th Biennial Workshop on Japan-Kamchatka-Alaska Subduction Processes, JKASP 2014. 22-26 September, 2014, Sapporo, Japan. 2014.    Аннотация
The 2012-2013 Tolbachik Fissure eruption started from lava gushing and effusion in the Menyailov vent on November 27 th , 2012; after three days the activity of this vent ceased and the eruption continued from the Naboko vent until its end in September 2013. The eruption produced about 0.7 km 3 of high-Al basaltic trachyandesites (Dvigalo et al., 2014). At Menyailov vent SiO2 concentrations were as high as 55.35 wt.% and K2O -2.67 wt.% -higher than in any previously erupted rocks in Tolbachik monogenetic area. From the beginning of December, SiO 2 concentration in lavas dropped by 2 wt.% and remained at this level until the end of eruption. MgO, TiO2, Mg# increased, K2O, Na2O decreased slightly. Most prominent change we observe in K2O/MgO ratio, which was about 0.7 in the Menyailov vent rocks and became 0.5 in the Naboko vent rocks. Details of the geochemical composition of the volcanic rocks produced by this eruption are reported elsewhere (Volynets et al., 2013, Volynets et al., 2014 a, b); here we present the results of the geochemical study of the main phenocrysts in the lavas – plagioclase. For the detailed geochemical study of the plagioclase we selected two samples from the Naboko vent (Pl-phyric lavas, erupted in February and August) and five crystal lapilli (two of them were erupted in December 2012, and three – during 2013, when the new cone has been already built). Plagioclases in these lavas are represented by two generations of labradorite and bytownite. Pl phenocrysts of the 1 st generation are large (up to 2 cm on the long axis) strongly resorbed at the edges and sometimes in the cores as well, containing lots of glass inclusions. Pl subphenocrysts of the 2 nd generation are smaller (less than 500 µm), usually nonresorbed and clean, having euhedral facets. Normal, reversed and patchy zoning are typical for all studied crystals (fig.1, I and II). Maximum concentrations of An (up to 83% at compositional variation between An50 and 74) has been measured in the patchy zones. Crystal lapilli are characterized by the oscillatory zoning with An fluctuations around An57-63 (fig. 1, III and IV). This kind of zoning is the result of the diffusion control of Pl growth at low growth rates (Sibley et al., 1976). The edges of lapilli are usually rich of glassy inclusions, tunnel-like dissolution structures, Ol, Px, Mt inclusions (fig. 1, III and IV). There are abundant resorption zones in lapilli, with plenty of glassy inclusions. These zones are characterized by the patchy zoning with An concentration jumps up to An74; usually these high-An areas are observed near the inclusions of glass. At the edges of lapilli there are zones with An gradual decrease towards the rim from An 74 to An61.

Plagioclase lapilli and phenocrysts in the lavas of the 2012-2013 Tolbachik Fissure eruption.
Plinian basaltic andesite eruptions of Avachinsky volcano, Kamchatka, Russia: chronology, dynamics and deposits (2007)
Bazanova L.I., Puzankov M.Yu., Maksimov A.P. Plinian basaltic andesite eruptions of Avachinsky volcano, Kamchatka, Russia: chronology, dynamics and deposits // European Geosciences Union 2007. 2007. V. 9. P. 05012
Posteruption chemical evolution of a volcanic caldera lake: Karymsky Lake, Kamchatka (2013)
Taran Yuri, Inguaggiato Salvatore, Cardellini Carlo, Karpov Gennady Posteruption chemical evolution of a volcanic caldera lake: Karymsky Lake, Kamchatka // Geophysical Research Letters. 2013. V. 40. № 19. P. 5142-5146. doi:10.1002/grl.50961.    Аннотация
The 1996 short-lived subaqueous eruption at the Karymsky caldera lake suddenly changed the composition of the lake water. The lake, with a surface area of ∼10 km^2 and a volume of ∼0.5 km^3, became acidic, increased its salinity to ∼1000 mg/kg, and became dominated by SO4^2- and Ca^2+. Since the eruption, the lake chemistry has evolved in a predictable manner described by simple box model. As a result of dilution by incoming SO4-Ca-Mg-poor water, SO4, Ca, and Mg concentrations follow a simple exponential decrease with a characteristic time close to the residence time of the lake. Na, K, and Cl decrease relatively significantly slower, indicating a continuing input of these constituents into the lake that was initiated during the eruption. Thus, the dynamics of two groups of lake water solutes can be predicted by a simple box model for water and solute mass balance. Key Points Karymsky lake suddenly changed chemistry as a result of the 1996 eruption One-box dynamic model correctly describes the evolution of the lake chemistry The calculated fluxes of chemicals are in a good agreement with the field data
Pre-eruption deformation caused by dike intrusion beneath Kizimen volcano, Kamchatka, Russia, observed by InSAR (2013)
Ji Lingyun, Lu Zhong, Dzurisin Daniel, Senyukov Sergey Pre-eruption deformation caused by dike intrusion beneath Kizimen volcano, Kamchatka, Russia, observed by InSAR // Journal of Volcanology and Geothermal Research. 2013. V. 256. P. 87 - 95. doi: 10.1016/j.jvolgeores.2013.02.011.    Аннотация
Abstract Interferometric synthetic aperture radar (InSAR) images reveal a pre-eruption deformation signal at Kizimen volcano, Kamchatka, Russia, where an ongoing eruption began in mid-November, 2010. The previous eruption of this basaltic andesite-to-dacite stratovolcano occurred in 1927–1928. InSAR images from both ascending and descending orbital passes of Envisat and ALOS PALSAR satellites show as much as 6 cm of line-of-sight shortening from September 2008 to September 2010 in a broad area centered at Kizimen. About 20 cm of opening of a nearly vertical dike provides an adequate fit to the surface deformation pattern. The model dike is approximately 14 km long, 10 km high, centered 13 km beneath Kizimen, and strikes NE–SW. Time-series analysis of multi-temporal interferograms indicates that (1) intrusion started sometime between late 2008 and July 2009, (2) continued at a nearly constant rate, and (3) resulted in a volume expansion of 3.2 × 107 m3 by September 2010, i.e., about two months before the onset of the 2010 eruption. Earthquakes located above the tip of the dike accompanied the intrusion. Eventually, magma pressure in the dike exceeded the confining strength of the host rock, triggering the 2010 eruption. Our results provide insight into the intrusion process that preceded an explosive eruption at a Pacific Rim stratovolcano following nearly a century of quiescence, and therefore have implications for monitoring and hazards assessment at similar volcanoes elsewhere.
Precursors of Kamchatkan volcanoes eruptions (2015)
Girina O.A. Precursors of Kamchatkan volcanoes eruptions // 26th IUGG General Assembly. June 22-July 02, 2015. Abstracts. Prague: IUGG/IAVCEI. 2015. P. VS10p-451.
Prehistoric and 1933 debris avalanches and associated eruptions of Harimkotan Volcano (Kurile Islands) (1995)
Belousova Marina, Belousov Alexander Prehistoric and 1933 debris avalanches and associated eruptions of Harimkotan Volcano (Kurile Islands) // Periodico di Mineralogia. 1995. № LXIV. P. 99-101.
Problems of using volcanic thermae of the Kurile-Kamchatka Island arc for Power (1960)
Averiev V.V., Ivanov V.V., Piip B.I. Problems of using volcanic thermae of the Kurile-Kamchatka Island arc for Power // Bulletin of Volcanology. 1960. V. 23. № 1. P. 257-263. doi: 10.1007/BF02596653.
Production of phreatic explosions in the interaction of lava and ice (1990)
Vinogradov V.N., Muravyev Y.D., Nikitina I.M., Salamatin A.N. Production of phreatic explosions in the interaction of lava and ice // Volcanology and Seismology. 1990. V. 9. № 1. P. 89-98.    Аннотация
A matematical model is given of the formation of phreatic explosions in lava flows coming into contact with ice formations. Quantitative characteristics are derived for the various stages in the development of the explosion; by means of wich its strength and other parameters may be evaluated. The theoretical calculation results are in agreement with empirical data.
Progress and problems in volcanology (1972)
Gorshkov G.S. Progress and problems in volcanology // Tectonophysics. 1972. V. 13. № 1-4. P. 123-140.
Propagation style controls lava-snow interactions (2014)
Edwards B. , Belousov A., Belousova M. Propagation style controls lava-snow interactions // Nature Communications. 2014. V. 5. № 56666. P. 1-5. doi: 10.1038/ncomms6666.
Pyroclastic deposits of the 1984-1989 eruptions of Bezymianny volcano (1994)
Girina O.A. Pyroclastic deposits of the 1984-1989 eruptions of Bezymianny volcano // Volcanology and Seismology. 1994. V. 15. № 4. P. 479-490.
Pyroclastic deposits of the Bezymianny eruption in October 1984 (1991)
Girina O.A. Pyroclastic deposits of the Bezymianny eruption in October 1984 // Volcanology and Seismology. 1991. V. 12. № 3. P. 407-417.
Pyroclastic deposits of the different stages the Bezymianny volcano activity (1995)
Girina O.A. Pyroclastic deposits of the different stages the Bezymianny volcano activity // The ’95 International workshop on volcanoes commemorating the 5-th anniversary of Mt. Showa-Shinzan. 1995. P. P 43
Pyroclastic surge deposits of Bezymianny volcano (1995)
Girina O.A. Pyroclastic surge deposits of Bezymianny volcano // IUGG. XXI General Assembly. Colorado. 1995. P. B 419
Pyroclastic surge deposits of Bezymianny volcano (1997)
Girina O.A. Pyroclastic surge deposits of Bezymianny volcano // Volcanology and Seismology. 1997. V. 18. № 5. P. 547-560.
Pyroclastic surges and flows from the 8-10 May 1997 explosive eruption of Bezymianny volcano, Kamchatka, Russia (2002)
Belousov Alexander, Voight Barry, Belousova Marina, Petukhin Anatoly Pyroclastic surges and flows from the 8-10 May 1997 explosive eruption of Bezymianny volcano, Kamchatka, Russia // Bulletin of Volcanology. 2002. V. 64. № 7. P. 455-471. doi:10.1007/s00445-002-0222-5.
 Q
Quaternary Calderas of Kamchatka (1969)
Zubin M.I., Melekestsev I.V., Tarakanovsky A.A., Erlich E.N. Quaternary Calderas of Kamchatka // International Association of Volcanology and Chemistry of the Earth`s Interior. Sumposium on Volcanoes &Their Roots. Oxford: 1969. P. 111-113.
 R
RESTful Web Service for Kamchatka Volcanoes Observations (2014)
Sorokin A.A., Korolev S.P., Romanova I.M., Girina O.A., Urmanov I.P. RESTful Web Service for Kamchatka Volcanoes Observations // Modern Information Technologies in Earth Sciences. Proceedings of the International Conference. September 8-13, 2014, Petropavlovsk-Kamchatsky. Vladivostok: Dalnauka. 2014. P. 155
Radiocarbon dating and tephrochronology in Kamchatka (1993)
Braitseva O.A., Sulerzhitsky L.D., Litasova S.N., Melekestsev I.V., Ponomareva V.V. Radiocarbon dating and tephrochronology in Kamchatka // Radiocarbon. 1993. V. 35. № 3. P. 463-476.    Аннотация
We discuss results of 14C dates obtained from areas of young volcanoes in Kamchatka. We apply these dates to reconstructing regional volcanic activity during the Holocene.
Radiocarbon dating of holocene eruptions of the Elbrus Volcano in the northern Caucasus, Russia (1998)
Bogatikov O.A., Melekestsev I.V., Gurbanov A.G., Sulerzhitskii L.D., Katov D.M., Puriga A.I. Radiocarbon dating of holocene eruptions of the Elbrus Volcano in the northern Caucasus, Russia // Doklady Earth Sciences. 1998. V. 363. № 8. P. 1093-1095.
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