Distributions and carbon isotopic compositions of lipid biomarkers in authigenic carbonate crusts from the Nordic margin (Norwegian Sea)

• Published in: Organic Geochemistry
• Main Authors: Chevalier, Nicolas, Bouloubassi, Ioanna, Stadnitskaia, Alina, Taphanel, Marie-Hélène, Lorre, Anne, Damsté, Jaap Sinninghe, Pierre, Catherine
• Other Authors: Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN), Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)), École normale supérieure - Paris (ENS-PSL), Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS-PSL), Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)
• Format: Article in Journal/Newspaper
• Language: English
• Published: HAL CCSD 2010
• Subjects: Earth Science; [SDU]Sciences of the Universe [physics]; Norwegian Sea
• Online Access: https://hal.science/hal-04113858; https://doi.org/10.1016/j.orggeochem.2010.03.012

International audience We investigated the distributions and δ 13 C values of lipid biomarkers in authigenic carbonate crusts from the Nordic margin (Norwegian Sea). Abundant, highly 13 C-depleted archaeal and bacterial biomarkers revealed that anaerobic oxidation of methane (AOM) is associated with carbonate authigenesis at the Håkon Mosby Mud Volcano (HMMV) and the Nyegga pockmark field. No conclusive evidence for AOM was found in the crust sample from the Storegga Slide. ANME-2 methanotrophic archaea and sulfate-reducing bacteria from the Desulfosarcina/Desulfococcus cluster were inferred from lipid fingerprints. Distinct patterns of 13 C-depleted, non-isoprenoid dialkyl glycerol diethers (DAGEs) are possibly associated with unknown microbial partners in the AOM.