(Table 1) Geochemistry of the ETM-2 section from IODP Hole 302-M0004A ...

• Main Authors: Dickson, Alexander J, Cohen, Anthony S
• Format: Dataset
• Language: English
• Published: PANGAEA 2012
• Subjects: Sample code/label; DEPTH, sediment/rock; δ13C, organic carbon; δ98/95Mo; δ98/95Mo, standard deviation; Molybdenum; Rhenium; Titanium dioxide; Iron oxide, Fe2O3; DSDP/ODP/IODP sample designation; Exp302; CCGS Captain Molly Kool Vidar Viking; Integrated Ocean Drilling Program / International Ocean Discovery Program IODP; Arctic; Arctic Ocean; Global warming
• Online Access: https://dx.doi.org/10.1594/pangaea.825453; https://doi.pangaea.de/10.1594/PANGAEA.825453

During the early Eocene, a series of short-term global warming events ("hyperthermals”) occurred in response to the rapid release of carbon into the oceans and atmosphere. In order to investigate the response of ocean redox to global warming, we have determined the molybdenum isotope compositions (d98/95Mo) of samples spanning one such hyperthermal (Eocene Thermal Maximum 2 (ETM-2, 54.1 Ma)), from Integrated Ocean Drilling Program Expedition 302 Site M0004A in the Arctic Ocean. The highest d98/95Mo in our sample set (2.00 ± 0.11 per mil) corresponds to the development of local euxinia at Site M0004A during the peak of ETM-2, which we interpret as recording the global seawater d98/95Mo at that time. The ETM-2 seawater d98/95Mo is indistinguishable from a recent estimate of seawater d98/95Mo from an earlier hyperthermal (Paleocene Eocene Thermal Maximum (PETM, 55.9 Ma), d98/95Mo = 2.08 ± 0.11 per mil). We argue that the similarity in seawater d98/95Mo during ETM-2 and the PETM was caused by the development of ... : Sediment depth is given in mcd. ...