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Manganese nodules from the Tasman Sea off Sydney

Created 17/10/2025

Updated 17/10/2025

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Two manganese nodules were recently recovered by HMAS Kimbla from a water depth of 4300 m, in a northeast-trending trough about 250 nautical miles southeast of Sydney (155° 35E. 36° 15S). They were associated with greenish gray calcareous mud laid down below the lysocline, but above the carbonate compensation depth. The nodules are subspherical and about 10 cm in diameter, and have a high clay content, a low Mn:Fe ratio, and low contents of Ni (0.25%), Cu (0.17%) and Co (0.06%).

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Additional Info

Field Value
Title Manganese nodules from the Tasman Sea off Sydney
Language eng
Licence Not Specified
Landing Page https://data.gov.au/data/dataset/9a26fa36-7cd7-4ec7-88b3-51cfcf3fd537
Contact Point
Geoscience Australia Data
clientservices@ga.gov.au
Reference Period 20/04/2018
Geospatial Coverage
Map data © OpenStreetMap contributors
{
  "coordinates": [
    [
      [
        155.5,
        -36.3
      ],
      [
        155.6,
        -36.3
      ],
      [
        155.6,
        -36.2
      ],
      [
        155.5,
        -36.2
      ],
      [
        155.5,
        -36.3
      ]
    ]
  ],
  "type": "Polygon"
}
Data Portal Geoscience Australia

Data Source

This dataset was originally found on Geoscience Australia "Manganese nodules from the Tasman Sea off Sydney". Please visit the source to access the original metadata of the dataset:
https://ecat.ga.gov.au/geonetwork/srv/eng/csw/dataset/manganese-nodules-from-the-tasman-sea-off-sydney1