From Australian Oceans Data Network
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The percentage of CaCO3 in samples taken from various depths in core GC12, located in the Capricorn Channel

Created 24/06/2025

Updated 24/06/2025

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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). The percentage of CaCO3 in samples collected from different depths were analysed, along with other parameters, to determine changes in carbonate mineralogy and terrestrial influx. Levels of CaCO3% exhibit an higher percentage of >60% during the middle of Marine Isotope Stage (MIS) 3, levels similar to those seen in MIS 1. Throughout MIS 2 and during the glacial termination the CaCO3% remains relatively constant at ~60%. CaCO3 drops to 50% prior to a possible Antarctic cold reversal (between 14 ka BP and 12 ka BP) at 80cm in the core, before recovering to the 65-70% in the Holocene again.

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Additional Info

Field Value
Title The percentage of CaCO3 in samples taken from various depths in core GC12, located in the Capricorn Channel
Language eng
Licence Not Specified
Landing Page https://data.gov.au/data/dataset/b86c821f-7695-4cd1-9cb3-e859728ed3f2
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 "The percentage of CaCO3 in samples taken from various depths in core GC12, located in 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/the-percentage-of-caco3-in-samples-taken-from-various-depths-in-core-gc12-located-in-the-capric1