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Chemical and isotopic characterisation and sedimentation rates in Princess Charlotte Bay, Queensland

Created 17/10/2025

Updated 17/10/2025

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Chemical and isotopic characterisation of Recent sediments from Princess Charlotte Bay reveal a broad homogeneous sediment that has only a slight increase in CaC03 content from the shore to the reef. Carbon isotopic ratios of the organic fraction indicate that the carbon is 95 per cent oceanic. Kaolinite content is uniform at 4 weight per cent. The change from terrestrial/river to lagoonal sediment characteristics is sharp and occurs within 1km of the shoreline. The change from lagoonal to reefal sediment characteristics is equally as sharp and may be localised. The term near-shore mud is preferable to terrigenous mud. Sedimentation rates are in the range 2.3-6.1 mm/yr. with mixed layers up to 10 cm thick, as determined by the 210Pb method. 137Cs determinations of sedimentation rate are not in disagreement, but are likely to yield ambiguous results in the Great Barrier Reef Province, because of diffusive redistribution, owing to the low distribution coefficient, KD = 420-800, measured in lagoonal sediments.

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Additional Info

Field Value
Title Chemical and isotopic characterisation and sedimentation rates in Princess Charlotte Bay, Queensland
Language eng
Licence Not Specified
Landing Page https://data.gov.au/data/dataset/f6f02522-6798-4fbd-ad90-a743519bea23
Contact Point
Geoscience Australia Data
clientservices@ga.gov.au
Reference Period 20/04/2018
Geospatial Coverage
Map data © OpenStreetMap contributors
{
  "coordinates": [
    [
      [
        143.65,
        -14.54
      ],
      [
        144.22,
        -14.54
      ],
      [
        144.22,
        -14.17
      ],
      [
        143.65,
        -14.17
      ],
      [
        143.65,
        -14.54
      ]
    ]
  ],
  "type": "Polygon"
}
Data Portal Geoscience Australia

Data Source

This dataset was originally found on Geoscience Australia "Chemical and isotopic characterisation and sedimentation rates in Princess Charlotte Bay, Queensland". Please visit the source to access the original metadata of the dataset:
https://ecat.ga.gov.au/geonetwork/srv/eng/csw/dataset/chemical-and-isotopic-characterisation-and-sedimentation-rates-in-princess-charlotte-bay-queens