191652225.Pdf
Journal of Volcanology and Geothermal Research 296 (2015) 40–54 Contents lists available at ScienceDirect Journal of Volcanology and Geothermal Research journal homepage: www.elsevier.com/locate/jvolgeores Geochemistry and solute fluxes of volcano-hydrothermal systems of Shiashkotan, Kuril Islands Elena Kalacheva a,YuriTaranb,⁎, Tatiana Kotenko a a Institute of Volcanology and Seismology, Russian Academy of Sciences, Petropavlovsk-Kamchatsky 683006, Russia b Institute of Geophysics, Universidad Nacional Autónoma de México, Coyoacán, México D.F., 04510, Mexico article info abstract Article history: Shiashkotan Island belongs to the Northern Kuril island arc and consists of two joined volcanoes, Sinarka and Received 7 December 2014 Kuntomintar, with about 18 km of distance between the summits. Both volcanoes are active, with historic Accepted 13 March 2015 eruptions, and both emit fumarolic gases. Sinarka volcano is degassing through the extrusive dome with inacces- Available online 24 March 2015 sible strong and hot (N400 °C) fumaroles. A large fumarolic field of the Kuntomintar volcano situated in a wide eroded caldera-like crater hosts many fumarolic vents with temperatures from boiling point to 480 °C. Both Keywords: Volcano-hydrothermal systems volcanoes are characterized by intense hydrothermal activity discharging acid SO4-Cl waters, which are drained Shiashkotan, Kuril Islands to the Sea of Okhotsk by streams. At least 4 groups of near-neutral Na-Mg-Ca-Cl-SO4 springs with temperatures in He-C-H-O isotopes the range of 50–80 °C are located at the sea level, within tide zones and discharge slightly altered diluted seawa- Gas and water chemistry ter. Volcanic gas of Kuntomintar as well as all types of hydrothermal manifestations of both volcanoes were col- Solute fluxes, chemical erosion lected and analyzed for major and trace elements and water isotopes.
[Show full text]