First volatile inventory for Gorely volcano, Kamchatka

• Published in: Geophysical Research Letters
• Main Authors: Aiuppa, A., Giudice, G., Liuzzo, M., Tamburello, G., Allard, P., Calabrese, S., Chaplygin, I., Mcgonigle, A. J. S., Taran, Y.
• Other Authors: Institut de Physique du Globe de Paris (IPGP), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Université de La Réunion (UR)-Institut de Physique du Globe de Paris (IPG Paris)-Centre National de la Recherche Scientifique (CNRS)
• Format: Article in Journal/Newspaper
• Language: English
• Published: HAL CCSD 2012
• Subjects: [SDU]Sciences of the Universe [physics]; Pacific; Kamchatka
• Online Access: https://hal-insu.archives-ouvertes.fr/insu-03583362; https://hal-insu.archives-ouvertes.fr/insu-03583362/document; https://hal-insu.archives-ouvertes.fr/insu-03583362/file/Geophysical%20Research%20Letters%20-%202012%20-%20Aiuppa%20-%20First%20volatile%20inventory%20for%20Gorely%20volcano%20Kamchatka.pdf; https://doi.org/10.1029/2012GL051177

International audience 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 (H 2 O ∼93.5%, CO 2 , ∼2.6%, SO 2 ∼2.2%, HCl 1.1%, HF 0.3%, H 2 0.2%) and trace-halogens (Br, I), therefore estimating a total gas release of ∼11,000 tons·day -1 during 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 CO 2 and HCl, respectively. We show that Gorely's volcanic gas (H 2 O/SO 2 ∼43, CO 2 /SO 2 ∼1.2, HCl/SO 2 ∼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.