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Oxygen-isotope records, age-model results and sedimentation rates of core MD88-784

Created 23/06/2025

Updated 23/06/2025

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Core MD88-784 was recovered during the French ASPARA IV cruise in 1988, aboard the Marion Dufresne. The core was located on the Tasman Fracture Zone of the Mid-Ocean Ridge, within the Polar Front Zone.
Isotopic analysis was performed on tests of the planktonic foraminifera Neogloboquadrina pachyderma (200-250um), and indicate that the core contains isotope stages 1 to 3. The base of the core is found to reach the oxygen isotope stage 3-4 boundary. The core is considered to have lost the uppermost section of the core that converts the last 3kyr against the SPECMAP stack. The results also indicate that the Holocene period has the highest rates of sedimentation observed through time. Further variations (excluding isotope-stage 1) appear to indicate that a reduction of the sedimentation rate occurred during the interglacial periods, in contrast to that of the glacials.

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Additional Info

Field Value
Title Oxygen-isotope records, age-model results and sedimentation rates of core MD88-784
Language eng
Licence Not Specified
Landing Page https://data.gov.au/data/dataset/eb900310-2c21-45a3-ab9b-59a47444e248
Contact Point
Australian Ocean Data Network
patrick.dedeckker@anu.edu.au
Reference Period 01/01/1988 - 01/01/1988
Geospatial Coverage
Map data © OpenStreetMap contributors
{
  "coordinates": [
    [
      [
        144.5,
        -54.5
      ],
      [
        145.0,
        -54.5
      ],
      [
        145.0,
        -54.0
      ],
      [
        144.5,
        -54.0
      ],
      [
        144.5,
        -54.5
      ]
    ]
  ],
  "type": "Polygon"
}
Data Portal Australian Oceans Data Network

Data Source

This dataset was originally found on Australian Oceans Data Network "Oxygen-isotope records, age-model results and sedimentation rates of core MD88-784". Please visit the source to access the original metadata of the dataset:
https://catalogue.aodn.org.au/geonetwork/srv/eng/csw/dataset/oxygen-isotope-records-age-model-results-and-sedimentation-rates-of-core-md88-7841