First volatile inventory for Gorely volcano, Kamchatka

• Published in: Geophysical research letters 2012-03, Vol.39 (6), p.n/a
• Main Authors: Aiuppa, A., Giudice, G., Liuzzo, M., Tamburello, G., Allard, P., Calabrese, S., Chaplygin, I., McGonigle, A. J. S., Taran, Y.
• Format: Article
• Language: English
• Subjects: arc volcanism; Assessments; Carbon dioxide; Degassing; Flux; Fluxes; Geochemistry; Gorely; Halogens; magmatic gas chemistry; Origins; Plumes; Remote sensing; Sciences of the Universe; Stockpiling; Sulfur dioxide; Volcanic gases; Volcanoes
• ISSN: 0094-8276; 1944-8007
• DOI: 10.1029/2012GL051177

We report here the very first assessment of volatile flux emissions from Gorely, an actively degassing volcano in Kamchatka. Using a variety of in situ and remote sensing techniques, we determined the bulk plume concentrations of major volatiles (H2O ∼93.5%, CO2, ∼2.6%, SO2 ∼2.2%, HCl 1.1%, HF 0.3%, H20.2%) and trace‐halogens (Br, I), therefore estimating a total gas release of ∼11,000 tons·day−1during September 2011, at which time the target was non‐eruptively degassing at ∼900°C. Gorely is a typical arc emitter, contributing 0.3% and 1.6% of the total global fluxes from arc volcanism for CO2 and HCl, respectively. We show that Gorely's volcanic gas (H2O/SO2 ∼43, CO2/SO2 ∼1.2, HCl/SO2∼0.5) is a representative mean end‐member for arc magmatism in the north‐west Pacific region. On this basis we derive new constraints for the abundances and origins of volatiles in the subduction‐modified mantle source which feeds magmatism in Kamchatka. Key Points First gas inventory for Gorelyi volcano; refinement of Kamchatka gas budget Assessment of volatile abundances and origins in NW Pacific mantle source New constraints on volatile recycling at destructive (arc) plate margins