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Tanami Merged - Th equivalent concentration grid (AWAGS)

Created 17/10/2025

Updated 17/10/2025

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The radiometric, or gamma-ray spectrometric method, measures the natural variations in the gamma-rays detected near the Earth's surface as the result of the natural radioactive decay of potassium (K), uranium (U) and thorium (Th). The data collected are processed via standard methods to ensure the response recorded is that due only to the rocks in the ground. The results produce datasets that can be interpreted to reveal the geological structure of the sub-surface. The processed data is checked for quality by GA geophysicists to ensure that the final data released by GA are fit-for-purpose. This radiometric thorium grid has a cell size of 0.00018 degrees (approximately 20m) and shows thorium element concentration of the NTGS Tanami Merged Detailed Airborne Magnetic Radiometric and Digital Elevation Survey, NT, 2018 in units of parts per million (or ppm). The data used to produce this grid was acquired in 2018 by the NT Government, and consisted of 243199 line-kilometres of data at a line spacing between 100m and 200m, and 60m terrain clearance. To constrain long wavelengths in the grid, an independent data set, the Australia-wide Airborne Geophysical Survey (AWAGS) airborne magnetic data, was used to control the base levels of the survey grid.

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Additional Info

Field Value
Title Tanami Merged - Th equivalent concentration grid (AWAGS)
Language eng
Licence Not Specified
Landing Page https://data.gov.au/data/dataset/df8e2ff0-aaad-403b-a2d8-3c4ee168ea23
Contact Point
Geoscience Australia Data
clientservices@ga.gov.au
Reference Period 13/07/2018 - 23/10/2018
Geospatial Coverage
Map data © OpenStreetMap contributors
{
  "coordinates": [
    [
      [
        128.9868,
        -21.2566
      ],
      [
        131.536,
        -21.2566
      ],
      [
        131.536,
        -18.9627
      ],
      [
        128.9868,
        -18.9627
      ],
      [
        128.9868,
        -21.2566
      ]
    ]
  ],
  "type": "Polygon"
}
Data Portal Geoscience Australia

Data Source

This dataset was originally found on Geoscience Australia "Tanami Merged - Th equivalent concentration grid (AWAGS)". Please visit the source to access the original metadata of the dataset:
https://ecat.ga.gov.au/geonetwork/srv/eng/csw/dataset/tanami-merged-th-equivalent-concentration-grid-awags