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Gravity evidence for a major crustal fracture in eastern Australia

Created 16/10/2025

Updated 16/10/2025

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Gravity data are presented for 220 sites covering 180 000 square kilometres in the Prince Charles Mountains area of eastern Antarctica. Bouguer anomalies range from +60 m Gal over the Amery Ice Shelf (near sea level) to -120 m Gal at altitudes above 2000 m on the Antarctic ice cap. Bouguer anomalies correlate with the mass per unit area above sea level in the relation expected for a region in isostatic equilibrium. Smoothed free air anomalies range from +60 to -60 mGal. North-south trending anomalies over the Lambert Glacier and Amery Ice Shelf are thought to be due to a major fault along the Lambert Glacier, and a rift structure under the Amery Ice Shelf. To the west of these structures the free air anomalies trend mainly east-west.

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Field Value
Title Gravity evidence for a major crustal fracture in eastern Australia
Language eng
Licence Not Specified
Landing Page https://data.gov.au/data/dataset/bf7e602e-25c5-404a-88e4-e55324c88ff4
Contact Point
Geoscience Australia Data
clientservices@ga.gov.au
Reference Period 20/04/2018
Geospatial Coverage
Map data © OpenStreetMap contributors
{
  "coordinates": [
    [
      [
        60.0,
        -75.0
      ],
      [
        76.0,
        -75.0
      ],
      [
        76.0,
        -67.0
      ],
      [
        60.0,
        -67.0
      ],
      [
        60.0,
        -75.0
      ]
    ]
  ],
  "type": "Polygon"
}
Data Portal Geoscience Australia

Data Source

This dataset was originally found on Geoscience Australia "Gravity evidence for a major crustal fracture in eastern Australia". Please visit the source to access the original metadata of the dataset:
https://ecat.ga.gov.au/geonetwork/srv/eng/csw/dataset/gravity-evidence-for-a-major-crustal-fracture-in-eastern-australia