MacLeod, Kenneth G; Bergen, James A (2004): (Table T2) Stable carbon and oxygen isotopes of DSDP Leg 30, Leg 33, ODP Leg 130 and Leg 192 sites, Ontong Java Plateau [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.779345
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Abstract:
Stable isotopic analyses of bulk carbonates recovered from Ontong Java Plateau during Ocean Drilling Program (ODP) Leg 192 (Holes 1183A and 1186A) show an ~0.5 per mil increase in d18O values from the upper Campanian/lower Maastrichtian to the upper Maastrichtian. This shift is consistent with widespread evidence for cooling at this time. Similar shifts were found at other localities on Ontong Java Plateau (Deep Sea Drilling Project [DSDP] Sites 288 and 289 and ODP Site 807) and at DSDP Site 317 on Manihiki Plateau. These data extend evidence for Maastrichtian cooling into the southwestern tropical and subtropical Pacific. The record of apparent cooling survives despite a significant diagenetic overprint at all sites. Comparing average Maastrichtian d18O values among sites suggests that diagenesis caused d18O to first be shifted toward higher values and then back toward lower values as burial depth increased. Carbon isotopes at the six sites show no apparent primary shifts, but at four sites, the Cretaceous/Tertiary boundary interval coincides with a negative excursion attributed to alteration of sediments near the boundary.
Related to:
MacLeod, Kenneth G; Bergen, James A (2004): Apparent cooling in the tropical Pacific during the Maastrichtian and diagenetic artifacts in Late Cretaceous stable isotopic trends in bulk carbonate from Ontong Java Plateau. In: Fitton, JG; Mahoney, JJ; Wallace, PJ; Saunders, AD (eds.) Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 192, 1-15, https://doi.org/10.2973/odp.proc.sr.192.108.2004
Project(s):
Deep Sea Drilling Project (DSDP)
Ocean Drilling Program (ODP)
Coverage:
Median Latitude: -2.636518 * Median Longitude: 164.682354 * South-bound Latitude: -11.001500 * West-bound Longitude: 156.625000 * North-bound Latitude: 3.606000 * East-bound Longitude: -162.263000
Date/Time Start: 1973-05-21T00:00:00 * Date/Time End: 2000-10-20T00:00:00
Minimum DEPTH, sediment/rock: 134.92 m * Maximum DEPTH, sediment/rock: 1350.02 m
Event(s):
30-288A * Latitude: -5.972500 * Longitude: 161.825500 * Date/Time: 1973-05-21T00:00:00 * Elevation: -3000.0 m * Penetration: 988.5 m * Recovery: 60.9 m * Location: South Pacific Ocean * Campaign: Leg30 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 29 cores; 275 m cored; 9.5 m drilled; 22.1 % recovery
30-289 * Latitude: -0.498700 * Longitude: 158.511500 * Date/Time: 1973-05-31T00:00:00 * Elevation: -2206.0 m * Penetration: 1271 m * Recovery: 709.1 m * Location: South Pacific/PLATEAU * Campaign: Leg30 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 133 cores; 1270.8 m cored; 0 m drilled; 55.8 % recovery
33-317A * Latitude: -11.001500 * Longitude: -162.263000 * Date/Time: 1973-11-30T00:00:00 * Elevation: -2598.0 m * Penetration: 943.5 m * Recovery: 163.2 m * Location: South Pacific/PLATEAU * Campaign: Leg33 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 33 cores; 310.5 m cored; 3 m drilled; 52.6 % recovery
Comment:
Sediment depth is given in mbsf. External precision is <0.03 per mil for d13C and <0.05 per mil for d18O (1 sigma). For nannofossil datums and depths of holes 30-288A and 30-289 see Andrews, Packham, et al. (1975, doi:10.2973/dsdp.proc.30.1975), for Hole 33-317A see Schlanger, Jackson, et al. (1976, doi:10.2973/dsdp.proc.33.1976), for Hole 130-807C see Mao and Wise (1993, doi:10.2973/odp.proc.sr.130.054.1993), and for holes 192-1183A and 192-1186A see Bergen (2004, doi:10.1144/GSL.SP.2004.229.01.08).
Parameter(s):
# | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
---|---|---|---|---|---|---|
1 | Event label | Event | ||||
2 | Sample code/label | Sample label | MacLeod, Kenneth G | DSDP/ODP/IODP sample designation | ||
3 | DEPTH, sediment/rock | Depth sed | m | Geocode | ||
4 | δ13C | δ13C | ‰ PDB | MacLeod, Kenneth G | Mass spectrometer Finnigan Delta Plus | |
5 | δ18O | δ18O | ‰ | MacLeod, Kenneth G | Mass spectrometer Finnigan Delta Plus | with respect to PDB |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
744 data points