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Rb-Sr geochronology of the Jervois Range area in the eastern part of the Arunta Block, NT

Created 17/10/2025

Updated 17/10/2025

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New Rb-Sr isotopic data are presented for the Jervois Range area in the eastern part of the Arunta Block. The post-metamorphic Jinka and Jervois Granites yield an age of about 1750 m.y. An alaskitic granite is dated at about 1460 m.y. Pegmatite formation occurred about 1660 m.y. ago. Mineral ages are generally younger than total-rock ages, but no values significantly less than that of the alaskitic granite were found. This means that the Alice Springs Orogeny, which extensively reset large areas of the Arunta Block to the west, did not affect the Jervois area. In this and other geochronological comparisons, the Jervois area seems more akin to the rocks of the Tennant Creek Block, 400 km to the northwest, than to those of the Arunta Block.

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Title Rb-Sr geochronology of the Jervois Range area in the eastern part of the Arunta Block, NT
Language eng
Licence Not Specified
Landing Page https://data.gov.au/data/dataset/967f3b8e-44bc-489b-8068-2e410d858ac3
Contact Point
Geoscience Australia Data
clientservices@ga.gov.au
Reference Period 20/04/2018
Geospatial Coverage
Map data © OpenStreetMap contributors
{
  "coordinates": [
    [
      [
        126.0,
        -24.5
      ],
      [
        138.0,
        -24.5
      ],
      [
        138.0,
        -18.0
      ],
      [
        126.0,
        -18.0
      ],
      [
        126.0,
        -24.5
      ]
    ]
  ],
  "type": "Polygon"
}
Data Portal Geoscience Australia

Data Source

This dataset was originally found on Geoscience Australia "Rb-Sr geochronology of the Jervois Range area in the eastern part of the Arunta Block, NT". Please visit the source to access the original metadata of the dataset:
https://ecat.ga.gov.au/geonetwork/srv/eng/csw/dataset/rb-sr-geochronology-of-the-jervois-range-area-in-the-eastern-part-of-the-arunta-block-nt