@article{fdi:010074393,
  title = {{M}ethane-derived stromatolitic carbonate crust from an active fluid seepage in the western basin of the {S}ea of {M}armara : mineralogical, isotopic and molecular geochemical characterization},
  author = {{A}khoudas, {C}. and {C}hevalier, {N}. and {B}lanc-{V}alleron, {M}. {M}. and {K}lein, {V}. and {M}endez-{M}illan, {M}ercedes and {D}emange, {J}. and {D}alliah, {S}. and {R}ommevaux, {V}. and {B}oudouma, {O}. and {P}ierre, {C}. and {R}uffine, {L}.},
  editor = {},
  language = {{ENG}},
  abstract = {{C}old seeps along the {N}orth {A}natolian fault in the {S}ea of {M}armara ({T}urkey) were explored during submersible dives of the {M}arsite cruise in {N}ovember 2014 when sediments, pore waters and carbonate crusts were sampled at active fluid seeping sites. {I}n this study, we investigate the mineralogy, carbon and oxygen isotopic compositions and the lipid biomarkers of a carbonate crust from the western {T}ekirdag basin of the {S}ea of {M}armara. {T}his crust exhibits a laminated domal structure that resembles stromatolite. {T}he mineralogy of authigenic seep-carbonate is mostly represented by aragonite associated with minor amounts of high-magnesian calcite. {T}he abundance of pyrite associated with the authigenic seep-carbonate points to very intense bacterial sulfate reduction. {T}he carbon ( - 42.6 parts per thousand to - 34.4 parts per thousand) and oxygen ( - 1.5 parts per thousand to +1.1 parts per thousand) isotopic compositions of the authigenic seep-carbonate crust indicate that carbonate precipitation was related to anaerobic oxidation of methane and occurred in mixtures of bottom seawater with brackish water expelled from the underlying sediments. {A}bundant microbial lipid biomarkers with negative delta {C}-13 values ( - 121 parts per thousand to - 96 parts per thousand), confirm that anaerobic oxidation of methane ({AOM}) coupled with sulfate reduction, was mediated by methanotrophic archaea ({ANME}) and sulfate reducing bacteria ({SRB}). {D}iagnostic lipid fingerprints indicate that {ANME}-2 archaea and associated {SRB} were the prevalent {AOM}-mediating consortia, which characterize moderate to high methane flow at this site. {M}oreover, changes in microbial lipid distribution within the carbonate crust suggest a variation in the intensity of methane emission.},
  keywords = {{M}armara {S}ea ; {T}ekirdag {B}asin ; {M}ethane ; {A}uthigenic seep-carbonate ; {S}ulfate reduction ; {A}naerobic oxidation of methane ; {S}tromatolitic structure ; {S}table isotopes ; {L}ipid biomarkers ; {TURQUIE} ; {MARMARA} {MER}},
  booktitle = {},
  journal = {{D}eep-{S}ea {R}esearch {P}art {II} :{T}opical {S}tudies in {O}ceanography},
  volume = {153},
  numero = {{SI}},
  pages = {110--120},
  ISSN = {0967-0645},
  year = {2018},
  DOI = {10.1016/j.dsr2.2017.12.022},
  URL = {https://www.documentation.ird.fr/hor/fdi:010074393},
}