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Hillaire-Marcel, Claude; de Vernal, Anne; Aksu, Ali E; Macko, Stephen A (1989): Isotopic and micropaleontological record of sediments of the Baffin Bay [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.744850, Supplement to: Hillaire-Marcel, C et al. (1989): High-resolution isotopic and micropaleontological studies of Upper Pleistocene sediments at ODP Site 645, Baffin Bay. In: Srivastava, SP; Arthur, M; Clement, B; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 105, 599-616, https://doi.org/10.2973/odp.proc.sr.105.138.1989

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Abstract:
The oxygen and carbon isotopic compositions of the planktonic foraminifer, Neogloboquadrina pachyderma (sinistral), were determined at 20-cm intervals through the 'composite' top ~ 22 m of sediments at ODP Site 645 (Holes 645B, 645C, 645F, and 645G) and at 10-cm intervals through a 9-m piston core (85-027-016) collected during the Hudson site survey. Quantitative analyses of palynomorphs, notably dinocysts, and of planktonic foraminifers were performed. Organic and nitrogen contents and isotopic composition of nitrogen and carbon in organic matter also were determined. These data provide a high-resolution record of changes that occurred in surface-water masses during the last glacial cycle in Baffin Bay. The basin experienced low planktonic productivity during most of the late Pleistocene, either from dilution in surface water by meltwater discharges from the surrounding ice-sheet or from the presence of a relatively dense sea-ice cover. Peaks of meltwater discharge are indicated by d18O values as low as about 1.5 per mil, correlative d13C- d18O shifts, low concentration of planktonic foraminifers, high concentrations of glacially reworked pre-Quaternary palynomorphs, and low-salinity dinocyst assemblages. As a whole, d18O values ranging between 4.5 and 2.5 per mil allow the establishment of an 18O stratigraphy spanning isotopic stages 5 to 1. Because of the poor core recovery, the general paucity of microflora and microfauna, and the possible occurrence of slumping or debris flow at Site 645, further interpretation remains problematic.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Median Latitude: 70.539118 * Median Longitude: -64.583372 * South-bound Latitude: 70.457000 * West-bound Longitude: -64.654800 * North-bound Latitude: 71.333300 * East-bound Longitude: -64.266700
Date/Time Start: 1985-09-03T00:00:00 * Date/Time End: 1985-09-28T00:00:00
Event(s):
105-645 * Latitude: 70.457550 * Longitude: -64.654800 * Date/Time Start: 1985-09-03T00:00:00 * Date/Time End: 1985-09-28T00:00:00 * Elevation: -2018.1 m * Penetration: 1980 m * Recovery: 850.8 m * Location: Baffin Bay * Campaign: Leg105 * Basis: Joides Resolution * Method/Device: Composite Core (COMPCORE) * Comment: 139 cores; 1276.8 m cored; 0 m drilled; 66.6% recovery
HUD76-029-033 * Latitude: 71.333300 * Longitude: -64.266700 * Elevation: -2207.0 m * Location: Hudson Bay * Method/Device: Piston corer (PC)
HUD85-027-16 * Latitude: 70.457000 * Longitude: -64.540000 * Elevation: -2091.0 m * Location: Labrador Sea * Method/Device: Piston corer (PC)
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
5 datasets

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Datasets listed in this publication series

  1. Hillaire-Marcel, C; de Vernal, A; Aksu, AE et al. (1989): (Table 2) Nitrogen and carbon concentrations and isotopic composition of organic matter in samples from ODP Site 105-645. https://doi.org/10.1594/PANGAEA.744846
  2. Hillaire-Marcel, C; de Vernal, A; Aksu, AE et al. (1989): (Table 1) Stable oxygen and carbon isotope composition of Neogloboquadrina pachyderma of ODP Site 105-645. https://doi.org/10.1594/PANGAEA.744841
  3. Hillaire-Marcel, C; de Vernal, A; Aksu, AE et al. (1989): (Table 3) Palynomorph concentrations for ODP Site 105-645. https://doi.org/10.1594/PANGAEA.744847
  4. Hillaire-Marcel, C; de Vernal, A; Aksu, AE et al. (1989): (Table 1) Stable oxygen and carbon isotope composition of Neogloboquadrina pachyderma of sediment cores from the Baffin Bay. https://doi.org/10.1594/PANGAEA.744844
  5. Hillaire-Marcel, C; de Vernal, A; Aksu, AE et al. (1989): (Table 3) Palynomorph concentrations for sediment cores of the Baffin Bay. https://doi.org/10.1594/PANGAEA.744849