Diffuse and focused carbon dioxide and methane emissions from the Sousaki geothermal system, Greece | Zendy

D'Alessandro W. | Zendy; Brusca L. | Zendy; Kyriakopoulos K. | Zendy; Rotolo S. | Zendy; Michas G. | Zendy; Minio M. | Zendy; Papadakis G. | Zendy

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Diffuse and focused carbon dioxide and methane emissions from the Sousaki geothermal system, Greece

Author(s) -

D'Alessandro W.,

Brusca L.,

Kyriakopoulos K.,

Rotolo S.,

Michas G.,

Minio M.,

Papadakis G.

Publication year - 2006

Publication title -

geophysical research letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.007

H-Index - 273

eISSN - 1944-8007

pISSN - 0094-8276

DOI - 10.1029/2006gl025777

Subject(s) - geothermal gradient , carbon dioxide , methane , gas composition , hydrothermal circulation , flux (metallurgy) , environmental science , chemical composition , soil gas , mineralogy , composition (language) , atmospheric sciences , mixing ratio , environmental chemistry , geology , chemistry , soil water , soil science , physics , thermodynamics , geophysics , organic chemistry , seismology , linguistics , philosophy

We report first data on chemical composition of the gas emitted by the geothermal system of Sousaki, Greece. Gas manifestations display typical geothermal gas composition with CO 2 as the main component and CH 4 and H 2 S as minor species. Soil gas composition derives from the mixing of two end‐members (atmospheric air and geothermal gas). Soil CO 2 fluxes range from<2 to 33,400 g m −2 d −1 . The estimated diffuse output of hydrothermal CO 2 , estimated for an area of 0.015 km 2 , is about 630 g s −1 , while a tentative estimation of CH 4 diffuse output gave a value of about 1.15 g s −1 . Point sources accounted for lower flux values of ∼26 g s −1 of CO 2 , ∼0.1 g s −1 of CH 4 and ∼0.02 g s −1 of H 2 S.

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