Theissen, Kevin M; Dunbar, Robert G; Cooper, Alan K; Mucciarone, David A; Hoffmann, Dirk L (2003): Stable carbon and oxygen isotope ratios of foraminifera and organic carbon of ODP Hole 188-1167A (Table 2) [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.742618, Supplement to: Theissen, KM et al. (2003): The Pleistocene evolution of the East Antarctic Ice Sheet in the Prydz bay region: stable isotopic evidence from ODP Site 1167. Global and Planetary Change, 39(3-4), 227-256, https://doi.org/10.1016/S0921-8181(03)00118-8
Always quote citation above when using data! You can download the citation in several formats below.
Abstract:
Ocean Drilling Program Leg 188, Prydz Bay, East Antarctica is part of a larger initiative to explore the Cenozoic history of the Antarctic Ice Sheet through direct drilling and sampling of the continental margins. In this paper, we present stable isotopic results from Ocean Drilling Program (ODP) Site 1167 located on the Prydz Channel Trough Mouth Fan (TMF), the first Antarctic TMF to be drilled. The foraminifer-based d18O record is interpreted along with sedimentary and downhole logging evidence to reconstruct the Quaternary glacial history of Prydz Bay and the adjacent Lambert Glacier Amery Ice Shelf System (LGAISS). We report an electron spin resonance age date of 36.9±3.3 ka at 0.45 m below sea floor and correlate suspected glacial–interglacial cycles with the global isotopic stratigraphy to improve the chronology for Site 1167. The d18O record based on planktonic (Neogloboquadrina pachyderma (s.)) and limited benthic results (Globocassidulina crassa), indicates a trend of ice sheet expansion that was interrupted by a period of reduced ice volume and possibly warmer conditions during the early–mid-Pleistocene (0.9–1.38 Ma). An increase in d18O values after ~900 ka appears to coincide with the mid-Pleistocene climate transition and the expansion of the northern hemisphere ice sheet. The d18O record in the upper 50 m of the stratigraphic section indicates as few as three glacial–interglacial cycles, tentatively assigned as marine isotopic stages (MIS) 16–21, are preserved since the Brunhes/Matuyama paleomagnetic reversal (780 ka). This suggests that there is a large unconformity near the top of the section and/or that there may have been few extreme advances of the ice sheet since the mid-Pleistocene climate transition resulting in lowered sedimentation rates on the Prydz Channel TMF. The stable isotopic record from Site 1167 is one of the few available from the area south of the Antarctic Polar Front that has been linked with the global isotopic stratigraphy. Our results suggest the potential for the recovery of useful stable isotopic records in other TMFs.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Latitude: -66.400180 * Longitude: 72.284180
Date/Time Start: 2000-02-22T22:00:00 * Date/Time End: 2000-02-28T08:25:00
Minimum DEPTH, sediment/rock: 0.15 m * Maximum DEPTH, sediment/rock: 443.15 m
Event(s):
188-1167A * Latitude: -66.400180 * Longitude: 72.284180 * Date/Time Start: 2000-02-22T22:00:00 * Date/Time End: 2000-02-28T08:25:00 * Elevation: -1639.9 m * Penetration: 447.5 m * Recovery: 191.33 m * Location: Prydz Bay * Campaign: Leg188 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 49 cores; 447.5 m cored; 0 m drilled; 42.8 % recovery
Parameter(s):
# | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
---|---|---|---|---|---|---|
1 | Sample code/label | Sample label | Theissen, Kevin M | DSDP/ODP/IODP sample designation | ||
2 | DEPTH, sediment/rock | Depth sed | m | Geocode | ||
3 | Neogloboquadrina pachyderma sinistral, δ13C | N. pachyderma s δ13C | ‰ PDB | Theissen, Kevin M | Mass spectrometer Finnigan MAT 252 | |
4 | Neogloboquadrina pachyderma sinistral, δ18O | N. pachyderma s δ18O | ‰ PDB | Theissen, Kevin M | Mass spectrometer Finnigan MAT 252 | |
5 | Globocassidulina crassa, δ13C | G. crassa δ13C | ‰ PDB | Theissen, Kevin M | Mass spectrometer Finnigan MAT 252 | |
6 | Globocassidulina crassa, δ18O | G. crassa δ18O | ‰ PDB | Theissen, Kevin M | Mass spectrometer Finnigan MAT 252 | |
7 | Carbon, organic, total | TOC | % | Theissen, Kevin M | Element analyser CNS, Carlo Erba NA1500 | |
8 | δ13C, organic carbon | δ13C Corg | ‰ PDB | Theissen, Kevin M | Mass spectrometer Finnigan Delta Plus |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
2290 data points
Download Data
View dataset as HTML (shows only first 2000 rows)