Dickson, Alexander J; Cohen, Anthony S (2012): (Table 1) Geochemistry of the ETM-2 section from IODP Hole 302-M0004A [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.825453, Supplement to: Dickson, AJ; Cohen, AS (2012): A molybdenum isotope record of Eocene Thermal Maximum 2: Implications for global ocean redox during the early Eocene. Paleoceanography, 27(3), PA3230, https://doi.org/10.1029/2012PA002346
Always quote citation above when using data! You can download the citation in several formats below.
Abstract:
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 transient euxinia in the Arctic Ocean during each hyperthermal that allowed sediments accumulating in this basin to capture the long-term d98/95Mo of early Eocene seawater. Our new data therefore place a minimum constraint on the magnitude of transient global seafloor deoxygenation during early Eocene hyperthermals.
Project(s):
Coverage:
Latitude: 87.866580 * Longitude: 136.177350
Date/Time Start: 2004-08-27T00:00:00 * Date/Time End: 2004-08-27T00:00:00
Minimum DEPTH, sediment/rock: 368.16 m * Maximum DEPTH, sediment/rock: 370.62 m
Event(s):
302-M0004A (ACEX-M4A) * Latitude: 87.866580 * Longitude: 136.177350 * Date/Time: 2004-08-27T00:00:00 * Elevation: -1287.9 m * IGSN: IBCR0302RHVS001 * Penetration: 427.9 m * Recovery: 85.91 m * Location: Arctic Ocean * Campaign: Exp302 (Arctic Coring Expedition, ACEX) * Basis: CCGS Captain Molly Kool (Vidar Viking)
Comment:
Sediment depth is given in mcd.
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Sample code/label | Sample label | Dickson, Alexander J | DSDP/ODP/IODP sample designation | ||
| 2 | DEPTH, sediment/rock | Depth sed | m | Geocode | ||
| 3 | δ13C, organic carbon | δ13C Corg | ‰ PDB | Dickson, Alexander J | ||
| 4 | δ98/95Mo | δ98/95Mo | ‰ | Dickson, Alexander J | ||
| 5 | δ98/95Mo, standard deviation | δ98/95Mo std dev | ± | Dickson, Alexander J | ||
| 6 | Molybdenum | Mo | mg/kg | Dickson, Alexander J | ||
| 7 | Rhenium | Re | µg/kg | Dickson, Alexander J | ||
| 8 | Titanium dioxide | TiO2 | % | Dickson, Alexander J | ||
| 9 | Iron oxide, Fe2O3 | Fe2O3 | % | Dickson, Alexander J |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
105 data points