Explosive basaltic volcanism of the Chikurachki Volcano (Kurile arc, Russia): Insights on pre-eruptive magmatic conditions and volatile budget revealed from phenocryst-hosted melt inclusions and groundmass glasses (2005)
Gurenko A.A., Belousov A.B., Trumbull R.B., Sobolev A.V. Explosive basaltic volcanism of the Chikurachki Volcano (Kurile arc, Russia): Insights on pre-eruptive magmatic conditions and volatile budget revealed from phenocryst-hosted melt inclusions and groundmass glasses // Journal of Volcanology and Geothermal Research. 2005. Vol. 147. № 3-4. P. 203-232. doi:10.1016/j.jvolgeores.2005.04.002.
Fe-Mg и микроэлементная зональность в камчатских оливинах (2016)
Гордейчик Б.Н., Чурикова Т.Г., Кронц А., Симакин А.Г., Вёрнер Г. Fe-Mg и микроэлементная зональность в камчатских оливинах // Вулканизм, биосфера и экологические проблемы. Восьмая международная научная конференция. Сборник материалов. Туапсе, 1-6 октября 2016 г. Майкоп-Туапсе: Адыгейский государственный университет. 2016. С. 27-29.
First Historical Eruption of Kambalny Volcano (2018)
Gordeev E.I., Girina O.A., Gorbach N.V., Manevich A.G., Melnikov D.V., Anikin L.P., Manevich T.M, Dubrovskaya I. K., Chirkov S.A., Kartashova E.V. First Historical Eruption of Kambalny Volcano // Doklady Earth Sciences. 2018. Vol. 482. P. 1257-1259. doi: 10.1134/S1028334X18100045.
The first historical eruption of Kambalny volcano began on March 24, 2017 with the powerful ash emission from the summit crater reaching as high as 6 km above sea level. The explosive activity continued without interruption from March 24 to March 30. The most powerful ash emission was registered on March 25–26, when the ash plume drifted several thousand kilometers SW, S, and SE from the volcano. On April 2 and April 9, after several calm days, powerful ash explosions occurred generating ash plumes up to 7 km high. The area of the land and sea over which the ash plume drifted during the day of March 25, was 650000 km2; the area of the ash accumulation on the land that was formed from March 24 to April 9, exceeded 1500 km2. These parameters were measured using the satellite-based data in the VolSatView information system. Domination of the silty fraction and the presence of secondary minerals (pyrite, gypsum, sulfur, and others) in the ash point to the phreatic character of the volcanic eruption.
First data on composition of the volcanic rocks of the IVS 50th anniversary Fissure Tolbachik eruption (Kamchatka) (2013)
Volynets A.O., Melnikov D.V., Yakushev A.I. First data on composition of the volcanic rocks of the IVS 50th anniversary Fissure Tolbachik eruption (Kamchatka) // Doklady Earth Sciences. 2013. Vol. 452. № 1. P. 953-957. doi:10.1134/S1028334X13090201.
First data on major, minor and trace element (XRF. ICP-MS) concentrations in the volcanic rocks of the IVS 50th anniversary Fissure Tolbachik eruption are reported for the period from 27.11.2012 to 25.01.2013; scheme of lava flows distribution by March 2013 is made. The volcanic rocks of the new eruption are substantially different from the other studied volcanic rocks of Tolbachinsky Dol by their higher alkalis and incompatible elements content. The rocks of the first three days of eruption (Menyailov Vent) have higher silica and alkalis content than all previously reported volcanic rocks of Tolbachinsky Dol. Volcanic rocks of the Naboko Vent, at silica content similar to high-Al basalts of Tolbachinsky Dol, have different concentrations of trace elements and some major elements (K2O, CaO, TiO2, P2O5). REE and other incompatible element concentrations in the rocks of the Menyailov Vent are higher than in the rocks of the Naboko Vent at the same element ratios. The differences of the volcanic rocks of the two vents of the new eruption may be caused by the fact that the erupted lavas came from the different levels of the same magma chamber.
First data on magma ascent and residence times retrieved from Fe-Mg and trace element zonation in olivine phenocrysts from Kamchatka basalts (2016)
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. Vol. 18. P. EGU2016-12839.
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.
First data on the volatile fluxes from passively degassing volcanoes of the Kuril Island arc (2017)
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. Vol. 19.
Formation of high-Al basalt by polybaric fractionation of a high-magnesia parent: Klyuchevskoi volcano (Kamchatka, Russia) (1995)
Barmina G.S., Ariskin A.A., Neilsen R.L., Ozerov A.Yu. Formation of high-Al basalt by polybaric fractionation of a high-magnesia parent: Klyuchevskoi volcano (Kamchatka, Russia) / AGU Spring Meeting 1995. Eos Trans. Abstract V42A-06. Baltimore, Maryland, USA: AGU. 1995. P. 298
Formation of partially submerged tuff ring during the 1996 sublacustrine surtseyan eruption in Karymskoye lake, Kamchatka,Russia (2000)
Belousov Alexander, Belousova Marina Formation of partially submerged tuff ring during the 1996 sublacustrine surtseyan eruption in Karymskoye lake, Kamchatka,Russia // Terra Nostra. International Maar Conference: GeoForschungs Zentrum Potsdam. 2000. Vol. 6. P. 42-52.