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Jamestown Hills thorium grid geodetic

Created 16/10/2025

Updated 16/10/2025

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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 0.00021 degrees (approximately 21m) and shows thorium element concentration of the SMMSP - MagSpec - Jamestown, SA, 2002 (2002/01) in units of parts per million (or ppm). The data used to produce this grid was acquired in 2002 by the SA Government, and consisted of 8919 line-kilometres of data at 100m line spacing and 60m terrain clearance.

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Additional Info

Field Value
Title Jamestown Hills thorium grid geodetic
Language eng
Licence Not Specified
Landing Page https://data.gov.au/data/dataset/86fb1205-e6e8-44aa-9985-495242a531fd
Contact Point
Geoscience Australia Data
clientservices@ga.gov.au
Reference Period 20/06/2002 - 02/08/2002
Geospatial Coverage
Map data © OpenStreetMap contributors
{
  "coordinates": [
    [
      [
        138.4456,
        -33.4212
      ],
      [
        138.7551,
        -33.4212
      ],
      [
        138.7551,
        -33.1046
      ],
      [
        138.4456,
        -33.1046
      ],
      [
        138.4456,
        -33.4212
      ]
    ]
  ],
  "type": "Polygon"
}
Data Portal Geoscience Australia

Data Source

This dataset was originally found on Geoscience Australia "Jamestown Hills thorium grid geodetic". Please visit the source to access the original metadata of the dataset:
https://ecat.ga.gov.au/geonetwork/srv/eng/csw/dataset/jamestown-hills-thorium-grid-geodetic