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Determining main carbonate mineralogy, and the primary components of the non carbonate fraction, at two depths in core GC14, collected from the Capricorn Channel.

Created 23/06/2025

Updated 23/06/2025

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A gravity core (GC14) was collected from a depth of 2004 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 ~80cm into the core. Two samples were collected for X-ray Diffraction (XRD) analysis; from the sediment surface (GC14-0) representing interglacial sediment, while the second sample, from 80cm (GC14-80) represents glacial sediment. XRD analysis of these samples show a slight increase in carbonate percentage during the interglacial compared to the glacial, with increased clay and quartz during the glacial. During the interglacial there are minor amounts of Mg calcite, which suggests that there is little influence from the reef platform on the sediments during the present sea-level, or that the core is presently below the Mg calcite compensation depth.

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Title Determining main carbonate mineralogy, and the primary components of the non carbonate fraction, at two depths in core GC14, collected from the Capricorn Channel.
Language eng
Licence Not Specified
Landing Page https://data.gov.au/data/dataset/3fd9cd02-c2bb-4a27-87a6-8f345c5661cf
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": [
    [
      [
        154.0,
        -24.0
      ],
      [
        154.5,
        -24.0
      ],
      [
        154.5,
        -23.5
      ],
      [
        154.0,
        -23.5
      ],
      [
        154.0,
        -24.0
      ]
    ]
  ],
  "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 GC14, 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-6