Results of geochemical monitoring of the activity of Ebeko volcano (Kurile Islands) used for eruption prediction

Menyailov, I. A.; Никитина, Л. П.; Shapar, V. N.

doi:10.1016/0264-3707(85)90038-9

Cited by 24 publications

(27 citation statements)

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“…Three phreatic eruptions in [1967][1968][1969][1970][1971] in the Northern crater were preceded by a short episode of increasing temperature of fumaroles (Menyailov et al, 1985). In October 1987, after 16 years of moderate low-temperature fumarolic activity, a new phreatic eruption started in the Northern crater lasting 3 months involving 5-6 daily gas-ash explosions (Menyailov et al, 1988).…”

Section: Ebeko Volcano Phreatic and Fumarolic Activitymentioning

confidence: 99%

“…The most recent phreatic activity with many evens took place in 2005-2011 (Коtenkо et al, 2007, 2012). Menyailov et al (1985Menyailov et al ( , 1988 monitored the fumarolic activity of Ebeko in 1960-1980 and noted changes in the activities of different groups of fumaroles before and after phreatic eruptions. They reported that the gas composition was stable, "steady state", between eruptions within a group, but differs between groups.…”

Section: Ebeko Volcano Phreatic and Fumarolic Activitymentioning

confidence: 99%

“…They reported that the gas composition was stable, "steady state", between eruptions within a group, but differs between groups. According to Menyailov et al (1985Menyailov et al ( , 1988, fumarolic activity in Ebeko is stable at low temperatures (usually, b120°C) between eruptions, but sharp changes occur shortly before and after phreatic events. They also noted significant a SO 2 proportion in gases with SO 2 /H 2 S between 1 and 10, and high concentrations of HCl (up to 0.3 mol%).…”

Section: Ebeko Volcano Phreatic and Fumarolic Activitymentioning

confidence: 99%

“…There were several attempts for measuring the heat output by fumaroles and hydrothermal system of the volcano (Nekhoroshev, 1960;Menyailov et al, 1988;Kotenko and Kotenko, 2006). Menyailov et al (1985Menyailov et al ( , 1988 and Kotenko et al (2007) reported chemical composition of fumarolic gases during different stages of the volcanic activity. Menyailov et al (1985Menyailov et al ( , 1988 have measured isotopic composition of the volcanic gas condensates and isotopic ratios of noble gases in two Ebeko fumaroles.…”

Section: Introductionmentioning

confidence: 99%

“…Menyailov et al (1985Menyailov et al ( , 1988 and Kotenko et al (2007) reported chemical composition of fumarolic gases during different stages of the volcanic activity. Menyailov et al (1985Menyailov et al ( , 1988 have measured isotopic composition of the volcanic gas condensates and isotopic ratios of noble gases in two Ebeko fumaroles. Geochemistry of thermal waters has been studies in Nikitina (1978), Markhinin and Stratula (1977), Fazlullin (1999), Bortnikova et al (2006) and Kalacheva and Kotenko (2013).…”

Section: Introductionmentioning

confidence: 99%

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Volcano–hydrothermal system of Ebeko volcano, Paramushir, Kuril Islands: Geochemistry and solute fluxes of magmatic chlorine and sulfur

Kalacheva

Taran

Котенко

et al. 2016

Journal of Volcanology and Geothermal Research

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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 b 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) SO 4 -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, b 20 t/d of SO 2 and b 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/SO 4 ratios and isotopic compositions, suggesting complicated boiling-condensationmixing processes.

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Section: Ebeko Volcano Phreatic and Fumarolic Activitymentioning

confidence: 99%

Section: Ebeko Volcano Phreatic and Fumarolic Activitymentioning

confidence: 99%

Section: Ebeko Volcano Phreatic and Fumarolic Activitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%