From Australian Oceans Data Network
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Determining main carbonate mineralogy, and the primary components of the non carbonate fraction, at four depths in core GC12, collected from the Capricorn Channel.

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). Analysis of other parameters revealed the Last Glacial Maximum (LGM) sitting at a depth of ~175cm into the core. Four samples were collected for X-ray Diffraction (XRD) analysis; the top two, at the sediment surface (GC12-0) and at 30cm (GC12-30) represent interglacial sediment, while the lower two, at 210cm (GC12-210) and 330cm (GC12-330) represent glacial sediment. XRD analysis suggests that the majority of the carbonate is calcite during the interglacials, primarily from pelagic carbonate production. During the glacials and transitions more quartz, feldspar, aragonite and Mg calcite are present. This suggests that there is a changing dominance of pelagic, terrigenous and reef platform material within the core related to sea-level variations.

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Field Value
Title Determining main carbonate mineralogy, and the primary components of the non carbonate fraction, at four depths in core GC12, collected from the Capricorn Channel.
Language eng
Licence Not Specified
Landing Page https://data.gov.au/data/dataset/39922080-ca08-4a97-939c-c94803f4ab44
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 "Determining main carbonate mineralogy, and the primary components of the non carbonate fraction, at four depths in core GC12, collected from the Capricorn Channel.". Please visit the source to access the original metadata of the dataset:
https://catalogue.aodn.org.au/geonetwork/srv/eng/csw/dataset/determining-main-carbonate-mineralogy-and-the-primary-components-of-the-non-carbonate-fraction-7