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Seismic Stratigraphy and Sediment Distribution on the Wilkes Land and Terre Adelie Margins, East Antarctica

Created 17/10/2025

Updated 17/10/2025

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Seismic reflection data show the existence of two major sedimentary basins along the continental margin of Wilkes Land and Terre Adélie, East Antarctica, that contain more than 5 s TWT (> 9 km) of sediments. Four seismic megasequences are identified (MS4 to MS1) that are bounded by: basement, unconformities of interpreted Turonian, Maastrichtian and early Middle Eocene age, and the seafloor. The 4-5 km thick rift and pre-rift sediments are concentrated in a margin-parallel basin (Sabrina Basin). On the basis of seismic correlation with the Australian margin, this basin is interpreted to be of Late Jurassic to mid-Cretaceous age. The post-rift sediments are generally thick along the margin and in the adjacent deep-ocean basin, but are particularly thick in a major depocentre off west Wilkes Land, named here the Budd Coast Basin (BCB). The BCB contains a maximum observed thickness of 5 s TWT (9 km) of post-rift sediments and its location suggests that the sediments were largely derived from a sub-glacial basin currently occupied by the Totten Glacier.

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Title Seismic Stratigraphy and Sediment Distribution on the Wilkes Land and Terre Adelie Margins, East Antarctica
Language eng
Licence Not Specified
Landing Page https://data.gov.au/data/dataset/60c5eb73-81b0-4b98-8bf6-8e6e9f4673d7
Contact Point
Geoscience Australia Data
clientservices@ga.gov.au
Reference Period 22/04/2018
Geospatial Coverage
Map data © OpenStreetMap contributors
{
  "coordinates": [
    [
      [
        110.0,
        -69.0
      ],
      [
        154.0,
        -69.0
      ],
      [
        154.0,
        -60.0
      ],
      [
        110.0,
        -60.0
      ],
      [
        110.0,
        -69.0
      ]
    ]
  ],
  "type": "Polygon"
}
Data Portal Geoscience Australia

Data Source

This dataset was originally found on Geoscience Australia "Seismic Stratigraphy and Sediment Distribution on the Wilkes Land and Terre Adelie Margins, East Antarctica". Please visit the source to access the original metadata of the dataset:
https://ecat.ga.gov.au/geonetwork/srv/eng/csw/dataset/seismic-stratigraphy-and-sediment-distribution-on-the-wilkes-land-and-terre-adelie-margins-east