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Geology and mineralisation of the Arunta Inlier, Northern Territory

Created 17/10/2025

Updated 17/10/2025

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The Arunta Inlier forms an extensive Proterozoic terrain in central Australia. It occupies an area of 200 000 km2 on the southern margin of the Palaeoproterozoic Northern Australian Orogenic Province. Differential uplift of the Arunta region by crustal-scale fault system(s) exposed rocks which originated at depths of 5-25 km and were subjected to a multistage tectono-metamorphic history spanning more than 1500 million years. The Arunta Inlier is divided into three provinces - Northern, Central and Southern-distinguished on the basis of lithology, stratigraphy and tectonostratigraphic history. It hosts several hundred small mineral occurrences, containing gold, base metals, tin, tungsten and tantalum, as well as non-metallic commodities, such as vermiculite, gamet, fluorite and barite. These occurrences represent a variety of genetic types, including stratabound, pegmatitic, metasomatic, hydrothermal, magmatic and supergene deposits. None of the deposits is large. Apart from the Mud Tank vermiculite deposit, which is currently being mined, none of the occurrences is of economic size in todays terms. Until recently, relatively poor knowledge ofthe regional geology of the Arunta Inlier and limited understanding of the factors controlling mineralisation have hampered reliable assessment of the mineral potential of this province. New airborne geophysical, geochronological, stratigraphic, metamorphic and structural data contribute to upgrading the mineral potential of this region, in particular for gold and base metals.

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Additional Info

Field Value
Title Geology and mineralisation of the Arunta Inlier, Northern Territory
Language eng
Licence Not Specified
Landing Page https://data.gov.au/data/dataset/dc4d979c-94bc-46f1-b86d-e68bdbc603b0
Contact Point
Geoscience Australia Data
clientservices@ga.gov.au
Reference Period 20/04/2018
Geospatial Coverage
Map data © OpenStreetMap contributors
{
  "coordinates": [
    [
      [
        127.0,
        -25.0
      ],
      [
        138.0,
        -25.0
      ],
      [
        138.0,
        -20.0
      ],
      [
        127.0,
        -20.0
      ],
      [
        127.0,
        -25.0
      ]
    ]
  ],
  "type": "Polygon"
}
Data Portal Geoscience Australia

Data Source

This dataset was originally found on Geoscience Australia "Geology and mineralisation of the Arunta Inlier, Northern Territory". Please visit the source to access the original metadata of the dataset:
https://ecat.ga.gov.au/geonetwork/srv/eng/csw/dataset/geology-and-mineralisation-of-the-arunta-inlier-northern-territory