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Age vs Depth profile of core GC12, collected from the Capricorn Channel off the Eastern Australian Coast

Created 23/06/2025

Updated 23/06/2025

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A gravity core (GC12) was collected from a depth of 990.5 mbsl within the Capricorn Channel, southern Great Barrier Reef (GBR). Isotopic values for 18-O and 13-C were obtained from Globigerinoides ruber and correlated with the SPECMAP age-model. Radiocarbon dating of Globigerinoides sacculifer was also undertaken at nine sample depths, and then corrected and correlated with the curve. This yielded an age vs. depth profile from which it was possible to determine approximate sedimentation rates. From the age-model we see the evidence of MIS 1 through to 5a with sedimentation rates ranging from 2 cm/kyr to 20 cm/kyr, with an average of 10cm/kyr. This is a high sedimentation rate for a sedimentary basin, however the core is situated on the increased slope of the Capricorn Channel, therefore sediments scoured off the shallow gradient slope above may feasibly be focused at this depth on the slope. The sedimentation rate exhibits a unorthodox pattern, with a very high rate (25 cm/kyr) during the middle of MIS 3.

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Field Value
Title Age vs Depth profile of core GC12, collected from the Capricorn Channel off the Eastern Australian Coast
Language eng
Licence Not Specified
Landing Page https://data.gov.au/data/dataset/c7e82cfe-5ec3-49ae-a44b-d9e48d59dafc
Contact Point
Australian Ocean Data Network
h.bostock@niwa.co.nz
Reference Period 01/01/1997 - 01/01/1997
Geospatial Coverage
Map data © OpenStreetMap contributors
{
  "coordinates": [
    [
      [
        151.5,
        -24.5
      ],
      [
        153.0,
        -24.5
      ],
      [
        153.0,
        -23.0
      ],
      [
        151.5,
        -23.0
      ],
      [
        151.5,
        -24.5
      ]
    ]
  ],
  "type": "Polygon"
}
Data Portal Australian Oceans Data Network

Data Source

This dataset was originally found on Australian Oceans Data Network "Age vs Depth profile of core GC12, collected from the Capricorn Channel off the Eastern Australian Coast". Please visit the source to access the original metadata of the dataset:
https://catalogue.aodn.org.au/geonetwork/srv/eng/csw/dataset/age-vs-depth-profile-of-core-gc12-collected-from-the-capricorn-channel-off-the-eastern-australi1