Physics
Scientific paper
Mar 2012
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012georl..3906307a&link_type=abstract
Geophysical Research Letters, Volume 39, Issue 6, CiteID L06307
Physics
Volcanology: Geochemical Modeling (1009, 3610), Volcanology: Volcano Monitoring (4302, 7280), Volcanology: Volcanic Gases, Volcanology: Remote Sensing Of Volcanoes (4337), Volcanology: General Or Miscellaneous
Scientific paper
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%, H2 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 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.
Aiuppa Alessandro
Allard Patrick
Calabrese S.
Chaplygin I.
Giudice Gaetano
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