Wilson, Paul A; Opdyke, Bradley N (1996): (Table 1) Chemical and isotopic compositions of rudist aragonite and magnesian calcite cements from ODP Hole 144-877A [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.712045
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Abstract:
The classic paleotemperature record based on d18O data from pelagic foraminiferal calcite suggests that equatorial sea-surface temperatures during the Maastrichtian (~12-20°C) were much cooler than today (~27-29°C). Such cool equatorial temperatures contradict basic theories of tropical atmospheric and ocean dynamics. We report d18O data from remarkably well preserved rudist aragonite and magnesian calcite cements of Maastrichtian age (~69+/-1 Ma) from the carbonate platform of Wodejebato guyot in the western Pacific. These data suggest that equatorial sea-surface temperatures in the Maastrichtian (best estimate ~27-32°C) were at least as warm as today. This finding helps reconcile the geologic d18O record with ocean-atmospheric dynamic theory and implies a reduction in the poleward heat flux required by global climate simulations of greenhouse conditions.
Related to:
Wilson, Paul A; Opdyke, Bradley N (1996): Equatorial sea-surface temperatures for the Maastrichtian revealed through remarkable preservation of metastable carbonate. Geology, 24(6), 555-558, https://doi.org/10.1130/0091-7613(1996)024%3C0555:ESSTFT%3E2.3.CO;2
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Latitude: 12.019100 * Longitude: 164.922100
Date/Time Start: 1992-06-19T05:53:00 * Date/Time End: 1992-06-21T10:10:00
Minimum DEPTH, sediment/rock: 41 m * Maximum DEPTH, sediment/rock: 41 m
Event(s):
144-877A * Latitude: 12.019100 * Longitude: 164.922100 * Date/Time Start: 1992-06-19T05:53:00 * Date/Time End: 1992-06-21T10:10:00 * Elevation: -1366.0 m * Penetration: 190.5 m * Recovery: 25.23 m * Location: North Pacific Ocean * Campaign: Leg144 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 20 cores; 190.4 m cored; 0 m drilled; 13.3 % recovery
Comment:
Zero values mean below detection limit.
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | DEPTH, sediment/rock | Depth sed | m | Geocode | ||
| 2 | Sample code/label | Sample label | Wilson, Paul A | DSDP/ODP/IODP sample designation | ||
| 3 | Sample type | Samp type | Wilson, Paul A | |||
| 4 | Number of observations | NOBS | # | Wilson, Paul A | ||
| 5 | Magnesium | Mg | % | Wilson, Paul A | minimum | |
| 6 | Magnesium | Mg | % | Wilson, Paul A | maximum | |
| 7 | Magnesium | Mg | % | Wilson, Paul A | Calculated average/mean values | |
| 8 | Strontium | Sr | % | Wilson, Paul A | minimum | |
| 9 | Strontium | Sr | % | Wilson, Paul A | maximum | |
| 10 | Strontium | Sr | % | Wilson, Paul A | Calculated average/mean values | |
| 11 | Iron | Fe | % | Wilson, Paul A | minimum | |
| 12 | Iron | Fe | % | Wilson, Paul A | maximum | |
| 13 | Iron | Fe | % | Wilson, Paul A | Calculated average/mean values | |
| 14 | Manganese | Mn | % | Wilson, Paul A | minimum | |
| 15 | Manganese | Mn | % | Wilson, Paul A | maximum | |
| 16 | Manganese | Mn | % | Wilson, Paul A | Calculated average/mean values | |
| 17 | δ13C, carbonate | δ13C carb | ‰ PDB | Wilson, Paul A | minimum | |
| 18 | δ13C, carbonate | δ13C carb | ‰ PDB | Wilson, Paul A | maximum | |
| 19 | δ13C, carbonate | δ13C carb | ‰ PDB | Wilson, Paul A | Calculated average/mean values | |
| 20 | δ18O, carbonate | δ18O carb | ‰ PDB | Wilson, Paul A | minimum | |
| 21 | δ18O, carbonate | δ18O carb | ‰ PDB | Wilson, Paul A | maximum | |
| 22 | δ18O, carbonate | δ18O carb | ‰ PDB | Wilson, Paul A | Calculated average/mean values |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
42 data points