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Age of the Warramunga Group, Tennant Creek Block, Northern Territory

Created 16/10/2025

Updated 16/10/2025

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A U-Pb zircon age for acid volcanics in the Bernborough Formation of the Warramunga Group indicates a depositional age of between 1819 m.y. and 1849 m.y. If a previously postulated correlation is correct, Division II rocks of the Arunta Block are also this age. The new data show unequivocally that amphibolite-facies rocks west-southwest of Tennant Creek are basement to the Warramunga Group and not merely its higher-grade equivalents.

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Field Value
Title Age of the Warramunga Group, Tennant Creek Block, Northern Territory
Language eng
Licence Not Specified
Landing Page https://data.gov.au/data/dataset/dea085c8-95c8-401d-b3fb-8107a4879f74
Contact Point
Geoscience Australia Data
clientservices@ga.gov.au
Reference Period 20/04/2018
Geospatial Coverage
Map data © OpenStreetMap contributors
{
  "coordinates": [
    [
      [
        133.6,
        -19.9
      ],
      [
        134.6,
        -19.9
      ],
      [
        134.6,
        -19.2
      ],
      [
        133.6,
        -19.2
      ],
      [
        133.6,
        -19.9
      ]
    ]
  ],
  "type": "Polygon"
}
Data Portal Geoscience Australia

Data Source

This dataset was originally found on Geoscience Australia "Age of the Warramunga Group, Tennant Creek Block, Northern Territory". Please visit the source to access the original metadata of the dataset:
https://ecat.ga.gov.au/geonetwork/srv/eng/csw/dataset/age-of-the-warramunga-group-tennant-creek-block-northern-territory