Title: Anaerobic oxidation of methane in a cold-water coral carbonate mound from the Gulf of Cadiz
Authors: Maignien, L. ×
Depreiter, D.
Foubert, Anneleen
Reveillaud, J.
De Mol, L.
Boeckx, P.
Blamart, D.
Henriet, J.-P.
Boon, N. #
Issue Date: 2010
Publisher: Springer-Verlag
Series Title: International Journal of Earth Sciences vol:in press
Abstract: The Gulf of Cadiz is an area of mud volcanism
and gas venting through the seafloor. In addition, several
cold-water coral carbonate mounds have been discovered
at the Pen Duick escarpment amidst the El Arraiche mud
volcano field on the Moroccan margin. One of these
mounds -named Alpha mound- has been studied to examine
the impact of the presence of methane on pore-water
geochemistry, potential sulphate reduction (SR) rate and
dissolved inorganic carbon (DIC) budget of the mound in
comparison with off-mound and off-escarpment locations.
Pore-water profiles of sulphate, sulphide, methane, and
DIC from the on-mound location showed the presence of a
sulphate to methane transition zone at 350 cm below the
sea floor. This was well correlated with an increase in SR
activity. 13C-depleted DIC at the transition zone (-21.9%
vs. Vienna Pee Dee Belemnite) indicated that microbial
methane oxidation significantly contribute to the DIC
budget of the mound. The Alpha mound thus represents a
new carbonate mound type where the presence and
anaerobic oxidation of methane has an important imprint
on both geochemistry and DIC isotopic signature and
budget of this carbonate mound.
ISSN: 1437-3254
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Non-KU Leuven Association publications
× corresponding author
# (joint) last author

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