First volatile inventory for Gorely volcano, Kamchatka

A. Aiuppa , G. Giudice , M. Liuzzo , G. Tamburello , P. Allard (1) , S. Calabrese , I. Chaplygin , A. J. S. Mcgonigle , Y. Taran

1 IPGP - Institut de Physique du Globe de Paris

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.

Domains: Sciences of the Universe [physics]

A. Aiuppa, G. Giudice, M. Liuzzo, G. Tamburello, P. Allard, et al.. First volatile inventory for Gorely volcano, Kamchatka. Geophysical Research Letters, 2012, 39, p. 115-124. ⟨10.1029/2012GL051177⟩. ⟨insu-03583362⟩