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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.