Ando, Atsushi; Kaiho, Kunio; Kawahata, Hodaka; Kakegawa, Takeshi (2008): Stable carbon and oxygen isotope ratios of bulk sediment from DSDP Hole 62-463 (Appendix A) [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.706068, Supplement to: Ando, A et al. (2008): Timing and magnitude of early Aptian extreme warming: Unraveling primary d18O variation in indurated pelagic carbonates at Deep Sea Drilling Project Site 463, central Pacific Ocean. Palaeogeography, Palaeoclimatology, Palaeoecology, 260(3-4), 463-476, https://doi.org/10.1016/j.palaeo.2007.12.007
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Published: 2008-10-16 • DOI registered: 2008-11-13
Abstract:
In order to elucidate early Aptian marine paleotemperature evolution across the period of enhanced organic carbon (Corg)-burial [Oceanic Anoxic Event (OAE) 1a], stable isotope analyses were performed on pelagic limestones at Deep Sea Drilling Project Site 463, central Pacific Ocean. The delta18O data exhibit a distinct anomaly by ~-2 per mil spanning the OAE 1a interval (i.e., a ~6 m-thick, phytoplanktonic Corg-rich unit constrained by magneto-, bio- and delta13C stratigraphy). Elucidation of paleotemperature significance of the delta18O shift is made by taking account of recent Sr/Ca evidence at the same section, which revealed that geochemical signals in carbonate-poor lithologies are relatively unaltered against burial diagenesis. By discriminating delta18O values from carbonate-poor samples (CaCO3 contents=5-30 wt.%), it appears that an abrupt rise in seasurface temperatures (SSTs) by 8 °C (=-1.7 per mil shift in delta18O) occurred immediately before OAE 1a, whereas a cooling mode likely prevailed during the peak Corg-burial. In terms of its stratigraphic relationship as to the Corg-rich interval and to a pronounced negative delta13C excursion, as well as its timescale, the observed SST rise resembles those associated with the Paleocene-Eocene thermal maximum and, more strikingly, Jurassic Toarcian OAE. This observation is consistent with the hypothesis that these paleoenvironmental events were driven by a common causal mechanism, which was likely initiated by the greenhouse effect via massive release of CH4 or CO2 from the isotopically-light carbon reservoir and terminated by a negative productivity feedback.
Project(s):
Deep Sea Drilling Project (DSDP)
Coverage:
Latitude: 21.350200 * Longitude: 174.667800
Date/Time Start: 1978-08-02T00:00:00 * Date/Time End: 1978-08-02T00:00:00
Minimum DEPTH, sediment/rock: 566.40 m * Maximum DEPTH, sediment/rock: 653.38 m
Event(s):
62-463 * Latitude: 21.350200 * Longitude: 174.667800 * Date/Time: 1978-08-02T00:00:00 * Elevation: -2525.0 m * Penetration: 822.5 m * Recovery: 305.5 m * Location: North Pacific/SEAMOUNT * Campaign: Leg62 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 92 cores; 820.5 m cored; 0 m drilled; 37.2 % recovery
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 | Ando, Atsushi | DSDP/ODP/IODP sample designation | ||
| 3 | Lithology/composition/facies | Lithology | Ando, Atsushi | |||
| 4 | δ18O, carbonate | δ18O carb | ‰ PDB | Ando, Atsushi | Isotope ratio mass spectrometry | |
| 5 | δ13C, carbonate | δ13C carb | ‰ PDB | Ando, Atsushi | Isotope ratio mass spectrometry | |
| 6 | Sample comment | Sample comment | Ando, Atsushi | RT = Rutgers University (Micromass Optima mass spectrometer), TH = Tohoku University (Finnigan MAT Delta S mass spectrometer) |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
260 data points
Data
| 1 Depth sed [m] | 2 Sample label | 3 Lithology | 4 δ18O carb [‰ PDB] | 5 δ13C carb [‰ PDB] | 6 Sample comment |
|---|---|---|---|---|---|
| 566.40 | 62-463-65-1,40-43 | limestone | 3.17 | -1.35 | TH |
| 568.00 | 62-463-65-2,50-53 | limestone | 3.25 | -1.32 | TH |
| 569.21 | 62-463-65-3,21-25 | limestone | 3.23 | -2.02 | TH |
| 575.94 | 62-463-66-1,44-48 | limestone | 3.45 | -1.58 | TH |
| 577.51 | 62-463-66-2,51-54 | limestone | 3.31 | -1.59 | TH |
| 578.98 | 62-463-66-3,48-50 | limestone | 3.63 | -1.59 | TH |
| 585.46 | 62-463-67-1,46-51 | limestone | 3.53 | -1.16 | TH |
| 586.95 | 62-463-67-2,45-48 | limestone | 4.29 | -1.25 | TH |
| 587.80 | 62-463-67-2,130-132 | limestone | 4.20 | -1.29 | TH |
| 594.80 | 62-463-68-1,30-32 | limestone | 4.63 | -2.09 | TH |
| 604.05 | 62-463-69-1,5-7 | limestone | 4.76 | -2.64 | TH |
| 604.34 | 62-463-69-1,34-39 | limestone | 4.76 | -2.72 | TH |
| 605.20 | 62-463-69-1,120-122 | limestone | 4.46 | -2.44 | TH |
| 605.90 | 62-463-69-2,40-42 | limestone | 4.72 | -2.39 | TH |
| 606.60 | 62-463-69-2,110-112 | limestone | 4.24 | -2.68 | TH |
| 607.33 | 62-463-69-3,33-36 | marly siltstone | 4.00 | -2.93 | TH |
| 614.02 | 62-463-70-1,52-56 | silicified marlstone | 3.11 | -3.09 | RT |
| 615.52 | 62-463-70-2,52-56 | silicified marlstone | 3.21 | -2.95 | RT |
| 616.35 | 62-463-70-2,135-137 | silicified marly siltstone | 2.00 | -2.69 | RT |
| 616.55 | 62-463-70-3,5-7 | silicified marly siltstone | 1.01 | -3.25 | RT |
| 618.50 | 62-463-70-4,50-53 | silicified marly siltstone | 1.89 | -2.61 | RT |
| 620.15 | 62-463-70-5,65-66 | silicified marlstone | -0.70 | -3.49 | RT |
| 620.25 | 62-463-70-5,75-77 | silicified marly siltstone | 0.35 | -2.53 | RT |
| 620.30 | 62-463-70-5,80-82 | silicified marlstone | -0.09 | -2.49 | RT |
| 620.95 | 62-463-70-5,145-147 | silstone | 1.82 | -3.43 | RT |
| 621.25 | 62-463-70-6,25-27 | marly siltstone | 1.98 | -4.39 | RT |
| 621.40 | 62-463-70-6,40-42 | marly siltstone | 0.91 | -3.42 | RT |
| 621.50 | 62-463-70-6,50-52 | marly siltstone | 0.56 | -2.94 | RT |
| 621.70 | 62-463-70-6,70-71 | marly siltstone | 1.20 | -3.74 | RT |
| 621.90 | 62-463-70-6,90-92 | silicified marly siltstone | -0.97 | -3.80 | RT |
| 622.71 | 62-463-70-7,21-23 | marly siltstone | -4.06 | -4.17 | RT |
| 622.91 | 62-463-70-CC,5-7 | marlstone | -4.24 | -3.43 | RT |
| 623.01 | 62-463-70-CC,21-23 | marlstone | -3.27 | -4.25 | RT |
| 623.07 | 62-463-71-7,7-9 | marlstone | -3.13 | -3.62 | RT |
| 623.52 | 62-463-71-1,52-54 | silicified siltstone | -0.64 | -4.53 | RT |
| 624.29 | 62-463-71-1,129-132 | silicified marlstone | 0.93 | -3.54 | RT |
| 624.51 | 62-463-71-2,1-3 | marly siltstone | 1.25 | -3.07 | RT |
| 624.75 | 62-463-71-2,25-27 | marly siltstone | 1.48 | -3.39 | RT |
| 624.90 | 62-463-71-2,40-42 | silicified marly siltstone | 1.80 | -3.87 | RT |
| 625.32 | 62-463-71-2,82-85 | marly siltstone | 1.94 | -3.35 | RT |
| 626.85 | 62-463-71-3,85-89 | marlstone | 2.63 | -2.77 | TH |
| 628.35 | 62-463-71-4,85-88 | silicified limestone | 2.72 | -2.50 | TH |
| 632.91 | 62-463-72-1,41-44 | marlstone | 2.60 | -2.76 | TH |
| 634.40 | 62-463-72-2,40-43 | silicified marlstone | 2.90 | -1.84 | TH |
| 636.47 | 62-463-72-3,97-100 | silicified marlstone | 3.01 | -2.75 | TH |
| 637.69 | 62-463-72-4,69-71 | limestone | 2.47 | -2.15 | TH |
| 638.28 | 62-463-72-5,28-31 | silicified limestone | 2.25 | -2.89 | TH |
| 643.01 | 62-463-73-1,101-104 | marly siltstone | 2.33 | -2.43 | TH |
| 644.46 | 62-463-73-2,96-98 | silicified marlstone | 2.41 | -3.43 | TH |
| 647.51 | 62-463-73-4,101-103 | silicified marlstone | 2.75 | -1.55 | TH |
| 651.85 | 62-463-74-1,35-37 | silicified limestone | 2.57 | -2.11 | TH |
| 653.38 | 62-463-74-2,38-40 | limestone | 2.62 | -2.71 | TH |