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Crater Line Investigation, Rum Jungle, N.T.

Created 16/10/2025

Updated 16/10/2025

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The Crater Line consists of a series of rock exposures outcropping in an arcuate pattern around the southwestern flank of the Rum Jungle granite. The exposed rocks are believed to represent part of the Brocks Creek group of Lower Proterozoic age. The Crater formation, the major mappable unit in the line of exposures, consists of metamorphosed clastic rocks totalling approximately 1500 feet in thickness. Significant radioactivity is restricted to three stratigraphic zones within the Crater formation. These have been mapped and are designate Crater Pebble Beds, Number One Pebble Bed, and Number Two Pebble Bed. Number One Pebble Bed appears to contain the most significant anomalies. The radioactivity is restricted to conglomerate beds. There may be a genetic relationship to the greater permeability formerly localized in the conglomeratic zones. The radioactivity is not localized by tectonic structures such as folds, faults, or changes in dip. No source of the radioactivity has been identified. The radioactivity probably emanates from members of the uranium disintegration series. Four areas containing significant anomalies and deserving further investigation were found along the Crater Line.

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Additional Info

Field Value
Title Crater Line Investigation, Rum Jungle, N.T.
Language eng
Licence Not Specified
Landing Page https://data.gov.au/data/dataset/36167e5f-4576-4fce-91ef-f3d12b8bde8c
Contact Point
Geoscience Australia Data
clientservices@ga.gov.au
Reference Period 22/04/2018
Geospatial Coverage
Map data © OpenStreetMap contributors
{
  "coordinates": [
    [
      [
        130.0,
        -13.5
      ],
      [
        131.5,
        -13.5
      ],
      [
        131.5,
        -12.5
      ],
      [
        130.0,
        -12.5
      ],
      [
        130.0,
        -13.5
      ]
    ]
  ],
  "type": "Polygon"
}
Data Portal Geoscience Australia

Data Source

This dataset was originally found on Geoscience Australia "Crater Line Investigation, Rum Jungle, N.T.". Please visit the source to access the original metadata of the dataset:
https://ecat.ga.gov.au/geonetwork/srv/eng/csw/dataset/crater-line-investigation-rum-jungle-n-t