(Table S1) Stable carbon isotope composition of dissolved inorganic carbon and Ion activity product of dolomite of IODP Exp 323 sites ...

• Main Authors: Wehrmann, Laura Mariana, Risgaard-Petersen, Nils, Schrum, Heather N, Walsh, Emily A, Huh, Youngsook, Ikehara, Minoru, Pierre, Catherine, d'Hondt, Steven L, Ferdelman, Timothy G, Ravelo, Ana Christina, Takahashi, Kozo, Zarikian, Carlos Alvarez
• Format: Dataset
• Language: English
• Published: PANGAEA 2011
• Subjects: Event label; DEPTH, sediment/rock; δ13C, dissolved inorganic carbon; Ion activity product, Log; Composite Core; Mass spectrometer Thermo Electron Delta plus IRMS; Calculated Moore et al. 2004; Exp323; Joides Resolution; Integrated Ocean Drilling Program / International Ocean Discovery Program IODP; Alvarez; Bering Sea; Nils; Petersen
• Online Access: https://dx.doi.org/10.1594/pangaea.780181; https://doi.pangaea.de/10.1594/PANGAEA.780181

We studied microbially mediated diagenetic processes driven by carbon mineralization in subseafloor sediment of the northeastern Bering Sea Slope to a depth of 745 meters below seafloor (mbsf). Sites U1343, U1344 and U1345 were drilled during Integrated Ocean Drilling Program (IODP) Expedition 323 at water depths of 1008 to 3172 m. They are situated in the high productivity “Green Belt” region, with organic carbon burial rates typical of the high-productivity upwelling domains on western continental margins. The three sites show strong geochemical similarities. The downward sequence of microbially mediated processes in the sediment encompasses (1) organoclastic sulfate reduction, (2) anaerobic oxidation of methane (AOM) coupled to sulfate reduction, and (3) methanogenesis. The sediment contains two distinct zones of diagenetic carbonate formation, located at the sulfate–methane transition zone (SMTZ) and between 300 and 400 mbsf. The SMTZ at the three sites is located between 6 and 9 mbsf. The upward methane ... : Supplement to: Wehrmann, Laura Mariana; Risgaard-Petersen, Nils; Schrum, Heather N; Walsh, Emily A; Huh, Youngsook; Ikehara, Minoru; Pierre, Catherine; d'Hondt, Steven L; Ferdelman, Timothy G; Ravelo, Ana Christina; Takahashi, Kozo; Zarikian, Carlos Alvarez (2011): Coupled organic and inorganic carbon cycling in the deep subseafloor sediment of the northeastern Bering Sea Slope (IODP Exp. 323). Chemical Geology, 284(3-4), 251-261 ...