First volatile inventory for Gorely volcano, Kamchatka
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...
Published in: | Geophysical Research Letters |
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Main Authors: | , , , , , , , , |
Other Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2012
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Subjects: | |
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 |
Summary: | 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. |
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