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Isostatic Residual Gravity Anomaly Colour Composite Image of Onshore Australia 2016

Created 17/10/2025

Updated 17/10/2025

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This image is derived from gravity observations stored in the Australian National Gravity Database (ANGD) as at February 2016 as well as data from the 2013 New South Wales Riverina gravity survey. Out of the approximately 1.8 million gravity observations 1,371,998 gravity stations in the ANGD together with 19,558 stations from the Riverina survey were used to generate this image. The image shows isostatic residual gravity anomalies over onshore continental Australia. The data used in this image has been acquired by the Commonwealth, State and Territory Governments, the mining and exploration industry, universities and research organisations from the 1940's to the present day. The isostatic corrections were based on the assumption that topographic loads are compensated at depth by crustal roots following the Airy-Heiskanen isostatic principle. A crustal density of 2670 kg/m3 was used for the isostatic correction, with an assumed density contrast between the crust and mantle of 400 kg/m3. An initial average depth to Moho at sea level of 37 km was used in the calculation. The isostatic corrections were then applied to the Complete Bouguer Gravity Anomaly Grid of Onshore Australia 2016 to produce the isostatic residual gravity anomaly grid. The Isostatic Residual Gravity Anomaly Grid of Onshore Australia 2016 has been image enhanced and displayed as a hue-saturation-intensity (HSI) image with sun shading from the northeast to create this product.

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Additional Info

Field Value
Title Isostatic Residual Gravity Anomaly Colour Composite Image of Onshore Australia 2016
Language eng
Licence Not Specified
Landing Page https://data.gov.au/data/dataset/96bb7660-94ac-4324-a65a-cb06d05b7537
Contact Point
Geoscience Australia Data
clientservices@ga.gov.au
Reference Period 01/01/1947 - 31/12/2015
Geospatial Coverage
Map data © OpenStreetMap contributors
{
  "coordinates": [
    [
      [
        112.5,
        -43.9
      ],
      [
        154.0,
        -43.9
      ],
      [
        154.0,
        -10.0
      ],
      [
        112.5,
        -10.0
      ],
      [
        112.5,
        -43.9
      ]
    ]
  ],
  "type": "Polygon"
}
Data Portal Geoscience Australia

Data Source

This dataset was originally found on Geoscience Australia "Isostatic Residual Gravity Anomaly Colour Composite Image of Onshore Australia 2016". Please visit the source to access the original metadata of the dataset:
https://ecat.ga.gov.au/geonetwork/srv/eng/csw/dataset/isostatic-residual-gravity-anomaly-colour-composite-image-of-onshore-australia-2016