M. Hovland and H. Svensen, Submarine pingoes: Indicators of shallow gas hydrates in a pockmark at Nyegga, Norwegian Sea, Marine Geology, vol.228, issue.1-4, pp.15-23, 2006.
DOI : 10.1016/j.margeo.2005.12.005

M. Ivanov, A. Mazzini, and V. Blinova, Seep mounds on the Southern V??ring Plateau (offshore Norway), Marine and Petroleum Geology, vol.27, issue.6, pp.1235-1261, 2010.
DOI : 10.1016/j.marpetgeo.2009.11.009

C. K. Paull, W. Ussler, I. , and S. R. Dallimore, Origin of pingo-like features on the Beaufort Sea shelf and their possible relationship to decomposing methane gas hydrates, Geophysical Research Letters, vol.71, issue.1, 2007.
DOI : 10.1029/GM124

R. Sassen, H. H. Roberts, and R. Carney, Free hydrocarbon gas, gas hydrate, and authigenic minerals in chemosynthetic communities of the northern Gulf of Mexico continental slope: relation to microbial processes, Chemical Geology, vol.205, issue.3-4, pp.3-4, 2004.
DOI : 10.1016/j.chemgeo.2003.12.032

C. Serié, M. Huuse, and N. H. Schødt, Gas hydrate pingoes: Deep seafloor evidence of focused fluid flow on continental margins, Geology, vol.40, issue.3, pp.207-210, 2012.
DOI : 10.1130/G32690.1

A. Judd and M. Hovland, Seabed fluid flow: The impact on geology , biology, and the marine environment Seabed Fluid Flow: The Impact on Geology, Biology, and the Marine Environment, pp.1-475, 2007.
DOI : 10.1017/CBO9780511535918

Y. P. Bezrodnykh, S. V. Deliya, V. Y. Lavrushin, E. A. Yunin, V. V. Poshibaev et al., Gas seeps in the North Caspian water area, Lithology and Mineral Resources, pp.373-383, 2013.
DOI : 10.1134/S0024490213050027

S. Dupré, J. Woodside, I. Klaucke, J. Mascle, and J. Foucher, Widespread active seepage activity on the Nile Deep Sea Fan (offshore Egypt) revealed by high-definition geophysical imagery, Marine Geology, vol.275, issue.1-4, pp.1-19, 2010.
DOI : 10.1016/j.margeo.2010.04.003

D. Feng, D. Chen, and H. H. Roberts, Petrographic and geochemical characterization of seep carbonate from Bush Hill (GC 185) gas vent and hydrate site of the Gulf of Mexico, Marine and Petroleum Geology, vol.26, issue.7, pp.1190-1198, 2009.
DOI : 10.1016/j.marpetgeo.2008.07.001

D. Fu-chen, Q. Liu, Z. Zhang, L. M. Cathles, I. et al., Biogenic fabrics in seep carbonates from an active gas vent site in Green Canyon Block 238, Gulf of Mexico, Marine and Petroleum Geology, vol.24, issue.5, pp.313-320, 2007.
DOI : 10.1016/j.marpetgeo.2007.03.003

V. N. Blinova, M. C. Comas, M. K. Ivanov, E. N. Poludetkina, and T. V. Matveeva, Active mud volcanism in the West Alboran Basin: Geochemical evidence of hydrocarbon seepage, Marine and Petroleum Geology, vol.28, issue.8, pp.1483-1504, 2011.
DOI : 10.1016/j.marpetgeo.2011.06.001

S. Chen, S. Hsu, C. Tsai, C. Ku, Y. Yeh et al., Gas seepage, pockmarks and mud volcanoes in the near shore of SW Taiwan, Marine Geophysical Researches, vol.17, issue.2, pp.133-147, 2010.
DOI : 10.1007/s11001-010-9097-6

V. Mastalerz, G. J. De-lange, A. Dählmann, and T. Feseker, Active venting at the Isis mud volcano, offshore Egypt: Origin and migration of hydrocarbons, Chemical Geology, vol.246, issue.1-2, pp.87-106, 2007.
DOI : 10.1016/j.chemgeo.2007.09.005

T. Pape, A. Bahr, S. A. Klapp, F. Abegg, and G. Bohrmann, High-intensity gas seepage causes rafting of shallow gas hydrates in the southeastern Black Sea, Earth and Planetary Science Letters, vol.307, issue.1-2, pp.35-46, 2011.
DOI : 10.1016/j.epsl.2011.04.030

A. Prinzhofer, E. Deville, R. Shakirov, A. Obzhirov, E. Suess et al., Origins of hydrocarbon gas seeping out from offshore mud volcanoes in the nile delta Mud volcanoes and gas vents in the Okhotsk Sea area, Tectonophysics Geo- Marine Letters, vol.59117, issue.24 3, pp.52-61, 2004.

L. Spulber, G. Etiope, C. Baciu, C. Malos, and S. N. Vlad, Methane emission from natural gas seeps and mud volcanoes in Transylvania (Romania), Geofluids, vol.46, issue.8, pp.463-475, 2010.
DOI : 10.1007/978-1-4615-2660-5

J. L. Charlou, J. P. Donval, and Y. Fouquet, Physical and chemical characterization of gas hydrates and associated methane plumes in the Congo???Angola Basin, Chemical Geology, vol.205, issue.3-4, pp.3-4, 2004.
DOI : 10.1016/j.chemgeo.2003.12.033

A. Gay, M. Lopez, C. Berndt, and M. Séranne, Geological controls on focused fluid flow associated with seafloor seeps in the Lower Congo Basin, Marine Geology, vol.244, issue.1-4, pp.68-92, 2007.
DOI : 10.1016/j.margeo.2007.06.003
URL : https://hal.archives-ouvertes.fr/hal-00406640

S. Hustoft, S. Bünz, J. Mienert, and S. Chand, Gas hydrate reservoir and active methane-venting province in sediments on <20??Ma young oceanic crust in the Fram Strait, offshore NW-Svalbard, Earth and Planetary Science Letters, vol.284, issue.1-2, pp.12-24, 2009.
DOI : 10.1016/j.epsl.2009.03.038

K. R. Newman, M. Cormier, and J. K. , Active methane venting observed at giant pockmarks along the U.S. mid-Atlantic shelf break, Earth and Planetary Science Letters, vol.267, issue.1-2, pp.341-352, 2008.
DOI : 10.1016/j.epsl.2007.11.053

J. Iglesias, G. Ercilla, S. García-gil, and A. G. Judd, Pockforms: an evaluation of pockmark-like seabed features on the Landes Plateau, Bay of Biscay, Geo-Marine Letters, vol.251, issue.1/2, pp.3-4, 2010.
DOI : 10.1016/j.margeo.2008.01.008

P. M. Barnes, G. Lamarche, and J. Bialas, Tectonic and geological framework for gas hydrates and cold seeps on the Hikurangi subduction margin, New Zealand, Marine Geology, vol.272, issue.1-4, pp.26-48, 2010.
DOI : 10.1016/j.margeo.2009.03.012

D. Fischer, J. M. Mogollón, and M. Strasser, Subduction zone earthquake as potential trigger of submarine hydrocarbon seepage, Nature Geoscience, vol.26, issue.8, pp.647-651, 2013.
DOI : 10.1016/j.marpetgeo.2009.01.019

L. Géli, P. Henry, and T. Zitter, Gas emissions and active tectonics within the submerged section of the North Anatolian Fault zone in the Sea of Marmara, Earth and Planetary Science Letters, vol.274, issue.1-2, pp.34-39, 2008.
DOI : 10.1016/j.epsl.2008.06.047

A. Hiruta, G. T. Snyder, H. Tomaru, and R. Matsumoto, Geochemical constraints for the formation and dissociation of gas hydrate in an area of high methane flux, eastern margin of the Japan Sea, Earth and Planetary Science Letters, vol.279, issue.3-4, pp.3-4, 2009.
DOI : 10.1016/j.epsl.2009.01.015

T. A. Zitter, P. Henry, and G. Aloisi, Cold seeps along the main Marmara Fault in the Sea of Marmara (Turkey), " Deep- Sea Research Part I: Oceanographic Research Papers, pp.552-570, 2008.

S. Schwietzke, O. A. Sherwood, and L. M. Bruhwiler, Upward revision of global fossil fuel methane emissions based on isotope database, Nature, vol.7, issue.7623, pp.88-91, 2016.
DOI : 10.5194/acp-7-2141-2007

M. Hovland, A. G. Judd, and R. A. Burke-jr, The global flux of methane from shallow submarine sediments, Chemosphere, vol.26, issue.1-4, pp.559-578, 1993.
DOI : 10.1016/0045-6535(93)90442-8

A. Boetius, K. Ravenschlag, and C. J. Schubert, A marine microbial consortium apparently mediating anaerobic oxidation of methane, Nature, vol.407, issue.6804, pp.623-626, 2000.
DOI : 10.1038/35036572

A. Boetius and F. Wenzhöfer, Seafloor oxygen consumption fuelled by methane from cold seeps, Nature Geoscience, vol.9, issue.9, pp.725-734, 2013.
DOI : 10.5194/bg-9-2947-2012

H. J. Mills, R. J. Martinez, S. Story, and P. A. Sobecky, Identification of Members of the Metabolically Active Microbial Populations Associated with Beggiatoa Species Mat Communities from Gulf of Mexico Cold-Seep Sediments, Applied and Environmental Microbiology, vol.70, issue.9, pp.5447-5458, 2004.
DOI : 10.1128/AEM.70.9.5447-5458.2004

K. Olu, J. C. Caprais, and J. Galéron, Influence of seep emission on the non-symbiont-bearing fauna and vagrant species at an active giant pockmark in the Gulf of Guinea (Congo???Angola margin), Deep Sea Research Part II: Topical Studies in Oceanography, vol.56, issue.23, pp.2380-2393, 2009.
DOI : 10.1016/j.dsr2.2009.04.017
URL : https://hal.archives-ouvertes.fr/hal-00450896

P. R. Dando and M. Hovland, Environmental effects of submarine seeping natural gas, Continental Shelf Research, vol.12, issue.10, pp.1197-1207, 1992.
DOI : 10.1016/0278-4343(92)90079-Y

P. Fleischer, T. H. Orsi, M. D. Richardson, and A. L. Anderson, Distribution of free gas in marine sediments: A global overview, pp.103-122, 2001.

G. C. Sills and S. J. Wheeler, The significance of gas for offshore operations, Continental Shelf Research, vol.12, issue.10, pp.1239-1250, 1992.
DOI : 10.1016/0278-4343(92)90083-V

N. Sultan, G. Bohrmann, and L. Ruffine, Pockmark formation and evolution in deep water Nigeria: Rapid hydrate growth versus slow hydrate dissolution, Journal of Geophysical Research: Solid Earth, vol.111, issue.24, pp.2679-2694, 2014.
DOI : 10.1029/2004JB003600
URL : http://onlinelibrary.wiley.com/doi/10.1002/2013JB010546/pdf

J. Thrasher, A. J. Fleet, S. J. Hay, M. Hovland, and S. Düppenbecker, Understanding geology as the key to using seepage in exploration: the spectrum of seepage styles, AAPG Memoir, issue.66, pp.223-241, 1996.

R. O. Barnes and E. D. Goldberg, Methane production and consumption in anoxic marine sediments, Geology, vol.4, issue.5, pp.297-300, 1976.
DOI : 10.1130/0091-7613(1976)4<297:MPACIA>2.0.CO;2

G. E. Claypool and I. R. Kaplan, The Origin and Distribution of Methane in Marine Sediments, Natural Gases in Marine Sediments, pp.99-139, 1974.
DOI : 10.1007/978-1-4684-2757-8_8

R. S. Oremland and B. F. Taylor, Sulfate reduction and methanogenesis in marine sediments, Geochimica et Cosmochimica Acta, vol.42, issue.2, pp.209-214, 1978.
DOI : 10.1016/0016-7037(78)90133-3

M. J. Whiticar, Correlation of natural gases with their sources, " in The Petroleum System: From Sources to Trap, pp.261-283, 1994.

M. J. Whiticar, Carbon and hydrogen isotope systematics of bacterial formation and oxidation of methane, Chemical Geology, vol.161, issue.1-3, pp.291-314, 1999.
DOI : 10.1016/S0009-2541(99)00092-3

M. J. Whiticar, E. Faber, and M. Schoell, Biogenic methane formation in marine and freshwater environments: CO2 reduction vs. acetate fermentation???Isotope evidence, Geochimica et Cosmochimica Acta, vol.50, issue.5, pp.693-709, 1986.
DOI : 10.1016/0016-7037(86)90346-7

B. B. Bernard, J. M. Brooks, and W. M. Sackett, Light hydrocarbons in recent Texas continental shelf and slope sediments, Journal of Geophysical Research, vol.20, issue.C8, pp.4053-4061, 1978.
DOI : 10.1007/978-1-4684-2757-8_4

H. M. Chung, J. R. Gormly, and R. M. Squires, Origin of gaseous hydrocarbons in subsurface environments: Theoretical considerations of carbon isotope distribution, Chemical Geology, vol.71, issue.1-3, pp.97-104, 1988.
DOI : 10.1016/0009-2541(88)90108-8

M. Schoell, The hydrogen and carbon isotopic composition of methane from natural gases of various origins, Geochimica et Cosmochimica Acta, vol.44, issue.5, pp.649-661, 1980.
DOI : 10.1016/0016-7037(80)90155-6

M. Schoell, B. B. Bernard, J. M. Brooks, and W. M. Sackett, Natural gas seepage in the Gulf of Mexico, American Association of Petroleum Geologists Bulletin Earth and Planetary Science Letters, vol.67, issue.31 1, pp.2225-2238, 1976.

A. Waseda and H. Iwano, Characterization of natural gases in Japan based on molecular and carbon isotope compositions, Geofluids, vol.307, issue.4, pp.286-292, 2008.
DOI : 10.1007/978-1-4899-0402-7_17

G. Etiope and B. S. Lollar, ABIOTIC METHANE ON EARTH, Reviews of Geophysics, vol.73, issue.311, pp.276-299, 2013.
DOI : 10.1016/j.gca.2009.01.021
URL : http://onlinelibrary.wiley.com/doi/10.1002/rog.20011/pdf

G. R. Dickens, M. M. Castillo, and J. C. Walker, A blast of gas in the latest Paleocene: Simulating first-order effects of massive dissociation of oceanic methane hydrate, Geology, vol.25, issue.3, pp.259-262, 1997.
DOI : 10.1130/0091-7613(1997)025<0259:ABOGIT>2.3.CO;2

J. P. Kennett, K. G. Cannariato, I. L. Hendy, and R. J. Behl, Methane Hydrates in Quaternary Climate Change: The Clathrate Gun Hypothesis, 2003.
DOI : 10.1016/0033-5894(90)90021-C

R. D. Norris and U. , Carbon cycling and chronology of climate warming during the Palaeocene/Eocene transition, Nature, vol.401, issue.6755, pp.775-778, 1999.
DOI : 10.1038/44545

H. Svensen, S. Planke, B. Jamtveit, and T. Pedersen, Seep carbonate formation controlled by hydrothermal vent complexes: a case study from the V???ring Basin, the Norwegian Sea, Geo-Marine Letters, vol.23, issue.3-4, pp.3-4, 2003.
DOI : 10.1007/s00367-003-0141-2

L. Hu, S. A. Yvon-lewis, J. D. Kessler, and I. R. Macdonald, Methane fluxes to the atmosphere from deepwater hydrocarbon seeps in the northern Gulf of Mexico, Journal of Geophysical Research: Oceans, vol.38, issue.C5, 2012.
DOI : 10.1029/2010GL045928

J. D. Kessler, D. L. Valentine, M. C. Redmond, and M. Du, Response to Comment on "A Persistent Oxygen Anomaly Reveals the Fate of Spilled Methane in the Deep Gulf of Mexico", Science, vol.2, issue.2, p.1033, 2011.
DOI : 10.1038/ngeo574

T. B. Ryerson, K. C. Aikin, and W. M. Angevine, Atmospheric emissions from the deepwater Horizon spill constrain airwater partitioning, hydrocarbon fate, and leak rate, Article ID L07803, 2011.
DOI : 10.1029/2011gl046726
URL : http://onlinelibrary.wiley.com/doi/10.1029/2011GL046726/pdf

T. B. Ryerson, R. Camilli, and J. D. Kessler, Chemical data quantify Deepwater Horizon hydrocarbon flow rate and environmental distribution, Proceedings of the National Academy of Sciences, vol.330, issue.6004, pp.20246-20253, 2012.
DOI : 10.1126/science.1195840

S. A. Yvon-lewis, L. Hu, and J. Kessler, Methane flux to the atmosphere from the Deepwater Horizon oil disaster, Geophysical Research Letters, vol.24, issue.4, 2011.
DOI : 10.1021/je60083a006
URL : http://onlinelibrary.wiley.com/doi/10.1029/2010GL045928/pdf

Y. Zhang, H. Zhao, W. Zhai, K. Zang, and J. Wang, Enhanced methane emissions from oil and gas exploration areas to the atmosphere ??? The central Bohai Sea, Marine Pollution Bulletin, vol.81, issue.1, pp.157-165, 2014.
DOI : 10.1016/j.marpolbul.2014.02.002

S. B. Dalsøren, C. L. Myhre, and G. Myhre, Atmospheric methane evolution the last 40 years, Atmospheric Chemistry and Physics, vol.16, issue.5, pp.3099-3126, 2016.
DOI : 10.5194/acp-16-3099-2016-supplement

C. L. Myhre, B. Ferré, and S. M. Platt, Extensive release of methane from Arctic seabed west of Svalbard during summer 2014 does not influence the atmosphere, Geophysical Research Letters, vol.36, issue.10, pp.4624-4631, 2016.
DOI : 10.1029/2009GL039191

S. Dupré, L. Berger, N. L. Bouffant, C. Scalabrin, and J. Bourillet, Fluid emissions at the Aquitaine Shelf (Bay of Biscay, France): A biogenic origin or the expression of hydrocarbon leakage?, Continental Shelf Research, vol.88, pp.24-33, 2014.
DOI : 10.1016/j.csr.2014.07.004

S. Dupré, B. Loubrieu, and C. Scalabrin, Discovery of widespread biogenic methane emissions and authigenic carbonate mound-like structures at the aquitaine shelf (Bay of Biscay), Proceedings of the AGU Fall Meeting, 2014.

J. Biteau, A. L. Marrec, M. L. Vot, and J. Masset, The Aquitaine Basin, Petroleum Geoscience, vol.12, issue.3, pp.247-273, 2006.
DOI : 10.1144/1354-079305-674

C. Pierre, M. Blanc-valleron, and S. Dupré, Methane derived authigenic carbonates from the upper continental margin of the Bay of Biscay (France), Proceedings of the AGU Fall Meeting Abstracts, p.1099, 2014.
URL : https://hal.archives-ouvertes.fr/hal-01139660

C. Pierre, J. Demange, M. Blanc-valleron, and S. Dupré, Authigenic carbonate mounds from active methane seeps on the southern Aquitaine Shelf (Bay of Biscay, France): Evidence for anaerobic oxidation of biogenic methane and submarine groundwater discharge during formation, Continental Shelf Research, vol.133, pp.13-25, 2017.
DOI : 10.1016/j.csr.2016.12.003
URL : https://hal.archives-ouvertes.fr/hal-01497300

N. Lanteri and L. Bignon, Device for taking pressurized samples, European Patent WO, p.128891, 2007.

Y. Chen, S. Wu, Y. Xie, C. Yang, and J. Zhang, A Novel Mechanical Gas-Tight Sampler for Hydrothermal Fluids, IEEE Journal of Oceanic Engineering, vol.32, issue.3, pp.603-608, 2007.
DOI : 10.1109/JOE.2007.891887

H. Huang, C. Yang, and S. Chen, Novel gas-tight multi-sampler for discrete deep-sea water, Chinese Journal of Mechanical Engineering, vol.25, issue.4, pp.722-728, 2012.
DOI : 10.3901/CJME.2012.04.722

J. S. Seewald, K. W. Doherty, T. R. Hammar, and S. P. Liberatore, Erratum: A new gas-tight isobaric sampler for hydrothermal fluids (Deep-Sea Research I, pp.189-196, 2002.
DOI : 10.1016/s0967-0637(02)00011-0

S. Wu, C. Yang, and C. A. Chen, A Handheld Sampler for Collecting Organic Samples from Shallow Hydrothermal Vents, Journal of Atmospheric and Oceanic Technology, vol.30, issue.8, pp.1951-1958, 2013.
DOI : 10.1175/JTECH-D-12-00189.1

S. Wu, C. Yang, H. Huang, and Y. Chen, Development of an electric control gas-tight sampler for seafloor hydrothermal fluids, Journal of Zhejiang University SCIENCE A, vol.15, issue.2, pp.120-129, 2014.
DOI : 10.1631/jzus.A1300233

M. Römer, H. Sahling, and T. Pape, Methane fluxes and carbonate deposits at a cold seep area of the Central Nile Deep Sea Fan, Eastern Mediterranean Sea, Marine Geology, vol.347, pp.27-42, 2014.
DOI : 10.1016/j.margeo.2013.10.011

E. J. Sauter, S. I. Muyakshin, and J. Charlou, Methane discharge from a deep-sea submarine mud volcano into the upper water column by gas hydrate-coated methane bubbles, Earth and Planetary Science Letters, vol.243, issue.3-4, pp.3-4, 2006.
DOI : 10.1016/j.epsl.2006.01.041

M. Römer, H. Sahling, T. Pape, G. Bohrmann, and V. Spieß, Quantification of gas bubble emissions from submarine hydrocarbon seeps at the Makran continental margin (offshore Pakistan), Journal of Geophysical Research: Oceans, vol.27, issue.5, 2012.
DOI : 10.1016/j.pocean.2005.03.008

M. Römer, H. Sahling, and T. Pape, Geological control and magnitude of methane ebullition from a high-flux seep area in the Black Sea???the Kerch seep area, Marine Geology, vol.319, issue.322, pp.319-322, 2012.
DOI : 10.1016/j.margeo.2012.07.005

M. E. Torres, J. Mcmanus, and D. E. Hammond, Fluid and chemical fluxes in and out of sediments hosting methane hydrate deposits on Hydrate Ridge, OR, I: Hydrological provinces, Earth and Planetary Science Letters, vol.201, issue.3-4, pp.3-4, 2002.
DOI : 10.1016/S0012-821X(02)00733-1

M. Hovland, A. G. Judd, K. Gürgey, R. P. Philp, C. Clayton et al., The global production of methane from shallow submarine sources, Continental Shelf Research, vol.12, issue.10, pp.1231-1238, 1992.
DOI : 10.1016/0278-4343(92)90082-U

J. Dai, Y. Song, C. Dai, and D. Wang, Geochemistry and accumulation of carbon dioxide gases in China, AAPG Bulletin, vol.80, issue.10, pp.1615-1626, 1996.

J. M. Hunt, R. J. Miller, and J. K. Whelan, Formation of C4???C7 hydrocarbons from bacterial degradation of naturally occurring terpenoids, Nature, vol.2, issue.5791, pp.577-578, 1980.
DOI : 10.1038/288577a0

S. W. Taylor, B. S. Lollar, and L. I. Wassenaar, Bacteriogenic Ethane in Near-Surface Aquifers:?? Implications for Leaking Hydrocarbon Well Bores, Environmental Science & Technology, vol.34, issue.22, pp.4727-4732, 2000.
DOI : 10.1021/es001066x

D. Rowe and A. Muehlenbachs, Low-temperature thermal generation of hydrocarbon gases in shallow shales, Nature, vol.398, issue.6722, pp.61-63, 1999.

C. Bourry, B. Chazallon, and J. L. Charlou, Free gas and gas hydrates from the Sea of Marmara, Turkey, Chemical Geology, vol.264, issue.1-4, pp.197-206, 2009.
DOI : 10.1016/j.chemgeo.2009.03.007
URL : https://hal.archives-ouvertes.fr/hal-00435429

R. Sassen, S. Joye, S. T. Sweet, D. A. Defreitas, A. V. Milkov et al., Thermogenic gas hydrates and hydrocarbon gases in complex chemosynthetic communities, Gulf of Mexico continental slope, Organic Geochemistry, vol.30, issue.7, pp.485-497, 1999.
DOI : 10.1016/S0146-6380(99)00050-9

C. Vandré, B. Cramer, P. Gerling, and J. Winsemann, Natural gas formation in the western Nile delta (Eastern Mediterranean): Thermogenic versus microbial, Organic Geochemistry, vol.38, issue.4, pp.523-539, 2007.
DOI : 10.1016/j.orggeochem.2006.12.006

J. W. Pohlman, E. A. Canuel, N. R. Chapman, G. D. Spence, M. J. Whiticar et al., The origin of thermogenic gas hydrates on the northern Cascadia Margin as inferred from isotopic (13C/12C and D/H) and molecular composition of hydrate and vent gas, Organic Geochemistry, vol.36, issue.5, pp.703-716, 2005.
DOI : 10.1016/j.orggeochem.2005.01.011

G. Etiope, A. Feyzullayev, A. V. Milkov, A. Waseda, K. Mizobe et al., Evidence of subsurface anaerobic biodegradation of hydrocarbons and potential secondary methanogenesis in terrestrial mud volcanoes, Marine and Petroleum Geology, vol.26, issue.9, pp.1692-1703, 2009.
DOI : 10.1016/j.marpetgeo.2008.12.002

I. M. Head, D. M. Jones, and S. R. Larter, Biological activity in the deep subsurface and the origin of heavy oil, Nature, vol.426, issue.6964, pp.344-352, 2003.
DOI : 10.1038/nature02134

D. M. Jones, I. M. Head, and N. D. Gray, Crude-oil biodegradation via methanogenesis in subsurface petroleum reservoirs, Nature, vol.85, issue.7175, pp.176-180, 2008.
DOI : 10.2118/80168-PA

R. J. Pallasser, Recognising biodegradation in gas/oil accumulations through the ?? 13 C compositions of gas components, Organic Geochemistry, vol.31, issue.12, pp.1363-1373, 2000.
DOI : 10.1016/S0146-6380(00)00101-7

L. Ruffine, O. Fandino, and J. Etoubleau, Geochemical Dynamics of the Natural-Gas Hydrate System in the Sea of Marmara, Offshore Turkey, Advances in Natural Gas Technology, pp.29-56, 2012.
DOI : 10.5772/36343

J. Choi, J. Kim, and M. E. Torres, Gas origin and migration in the Ulleung Basin, East Sea: Results from the Second Ulleung Basin Gas Hydrate Drilling Expedition (UBGH2), Marine and Petroleum Geology, vol.47, pp.113-124, 2013.
DOI : 10.1016/j.marpetgeo.2013.05.022

A. Prinzhofer and . Pernaton, Isotopically light methane in natural gas: bacterial imprint or diffusive fractionation?, Chemical Geology, vol.142, issue.3-4, pp.193-200, 1997.
DOI : 10.1016/S0009-2541(97)00082-X

W. S. Reeburgh, Methane consumption in Cariaco Trench waters and sediments, Earth and Planetary Science Letters, vol.28, issue.3, pp.337-344, 1976.
DOI : 10.1016/0012-821X(76)90195-3

M. Y. Yoshinaga, T. Holler, and T. Goldhammer, Carbon isotope equilibration during sulphate-limited anaerobic oxidation of methane, Nature Geoscience, vol.314, issue.3, pp.190-194, 2014.
DOI : 10.1126/science.1133796