From Geoscience Australia
JSON format icon JSON RDF format icon RDF ISO19115-3 XML

The gravity field of the Australian basement

Created 16/10/2025

Updated 16/10/2025

JSON format icon JSON RDF format icon RDF ISO19115-3 XML

The Australian gravity field is analysed to determine whether the basement differs between regions of exposed basement and of covered basement (sedimentary basins). When the thickness of cover is allowed for, there is no systematic change in gravity variability from exposed to covered basement regions and the pattern of density differences is inferred to be similar in the two basement types. With one exception the trends of the gravity anomalies are continuous from covered to exposed basement regions; therefore geological structure and rock formations in the basement are considered to be continuous between the two kinds of regions. After making allowance for altitude and the effects of cover beds, the covered basement is calculated to have gravity anomalies that average 5 mGal less than the exposed basement. This gravity difference is probably caused by the two kinds of basement not being isostatically balanced relative to each other, rather than the basements having a different average density. No major differences between exposed and covered basement are apparent. It is likely that the two basement types have a similar history of formation, and consequently similar mineral potential.

Files and APIs

Tags

Additional Info

Field Value
Title The gravity field of the Australian basement
Language eng
Licence Not Specified
Landing Page https://data.gov.au/data/dataset/f9bca492-e667-4d65-8126-4592127aa3a9
Contact Point
Geoscience Australia Data
clientservices@ga.gov.au
Reference Period 20/04/2018
Geospatial Coverage
Map data © OpenStreetMap contributors
{
  "coordinates": [
    [
      [
        110.0,
        -44.0
      ],
      [
        156.0,
        -44.0
      ],
      [
        156.0,
        -9.0
      ],
      [
        110.0,
        -9.0
      ],
      [
        110.0,
        -44.0
      ]
    ]
  ],
  "type": "Polygon"
}
Data Portal Geoscience Australia

Data Source

This dataset was originally found on Geoscience Australia "The gravity field of the Australian basement". Please visit the source to access the original metadata of the dataset:
https://ecat.ga.gov.au/geonetwork/srv/eng/csw/dataset/the-gravity-field-of-the-australian-basement