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Anaerobic oxidation of methane in a cold-water coral carbonate mound from the Gulf of Cadiz

Loïs Maignien (UGent) , Davy Depreiter (UGent) , A Foubert, Julie Reveillaud (UGent) , L De Mol, Pascal Boeckx (UGent) , D Blamart, Jean Henriet (UGent) and Nico Boon (UGent)
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Biotechnology for a sustainable economy (Bio-Economy)
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. (13)C-depleted DIC at the transition zone (-21.9aEuro degrees 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.
Keywords
Cold-water carbonate mound, Anaerobic oxidation of methane, Gulf of Cadiz, Methane, SULFATE REDUCTION, GAS HYDRATE, CONTINENTAL-MARGIN, AUTHIGENIC CARBONATES, PORCUPINE SEABIGHT, MARINE-SEDIMENTS, NATURAL-WATERS, SEA SEDIMENTS, MUD VOLCANOS, BLACK-SEA

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Citation

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Chicago
Maignien, Loïs, Davy Depreiter, A Foubert, Julie Reveillaud, L De Mol, Pascal Boeckx, D Blamart, Jean Henriet, and Nico Boon. 2011. “Anaerobic Oxidation of Methane in a Cold-water Coral Carbonate Mound from the Gulf of Cadiz.” International Journal of Earth Sciences 100 (6): 1413–1422.
APA
Maignien, L., Depreiter, D., Foubert, A., Reveillaud, J., De Mol, L., Boeckx, P., Blamart, D., et al. (2011). Anaerobic oxidation of methane in a cold-water coral carbonate mound from the Gulf of Cadiz. INTERNATIONAL JOURNAL OF EARTH SCIENCES, 100(6), 1413–1422.
Vancouver
1.
Maignien L, Depreiter D, Foubert A, Reveillaud J, De Mol L, Boeckx P, et al. Anaerobic oxidation of methane in a cold-water coral carbonate mound from the Gulf of Cadiz. INTERNATIONAL JOURNAL OF EARTH SCIENCES. 2011;100(6):1413–22.
MLA
Maignien, Loïs, Davy Depreiter, A Foubert, et al. “Anaerobic Oxidation of Methane in a Cold-water Coral Carbonate Mound from the Gulf of Cadiz.” INTERNATIONAL JOURNAL OF EARTH SCIENCES 100.6 (2011): 1413–1422. Print.
@article{1983582,
  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. (13)C-depleted DIC at the transition zone (-21.9aEuro degrees 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.},
  author       = {Maignien, Lo{\"i}s and Depreiter, Davy and Foubert, A and Reveillaud, Julie and De Mol, L and Boeckx, Pascal and Blamart, D and Henriet, Jean and Boon, Nico},
  issn         = {1437-3254},
  journal      = {INTERNATIONAL JOURNAL OF EARTH SCIENCES},
  keyword      = {Cold-water carbonate mound,Anaerobic oxidation of methane,Gulf of Cadiz,Methane,SULFATE REDUCTION,GAS HYDRATE,CONTINENTAL-MARGIN,AUTHIGENIC CARBONATES,PORCUPINE SEABIGHT,MARINE-SEDIMENTS,NATURAL-WATERS,SEA SEDIMENTS,MUD VOLCANOS,BLACK-SEA},
  language     = {eng},
  number       = {6},
  pages        = {1413--1422},
  title        = {Anaerobic oxidation of methane in a cold-water coral carbonate mound from the Gulf of Cadiz},
  url          = {http://dx.doi.org/10.1007/s00531-010-0528-z},
  volume       = {100},
  year         = {2011},
}

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