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Determining main carbonate mineralogy, and the primary components of the non carbonate fraction, at two depths in core GC10, collected from the Capricorn Channel.

Created 24/06/2025

Updated 24/06/2025

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A gravity core (GC10) was collected from a depth of 335 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 ~130cm into the core. Three samples were collected for X-ray Diffraction (XRD) analysis; at the sediment surface (GC10-0) representing interglacial sediment, 100cm depth (GC10-100) and 270cm (GC10-270) - both of which represent glacial sediment. XRD analysis shows that during the interglacials aragonite increases relative to calcite, presumably as a result of shelf carbonate transported down the channel. During the glacials there is a higher percentage of quartz and feldspar, but reduced clay content in the non-carbonate fraction. This suggests that the terrigenous fraction is dominant within the sediments, however the energy in the environment is possibly too high for the clays to settle.

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Title Determining main carbonate mineralogy, and the primary components of the non carbonate fraction, at two depths in core GC10, collected from the Capricorn Channel.
Language eng
Licence Not Specified
Landing Page https://data.gov.au/data/dataset/10b1d05d-fb3c-45fd-a512-dcc3476bb1ef
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 two depths in core GC10, 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-11