GSWA Prince Regent Montague Merged Thorium Grid Geodetic

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 0.00083 degrees (approximately 91m) and shows thorium element concentration of the Prince Regent-Cambden-Montague Sound-Charnley merge, 1994-2012 in units of parts per million (or ppm). The data used to produce this grid was acquired in 1994 by the WA Government, and consisted of 187646 line-kilometres of data at a line spacing between 200m and 800m, and 50m terrain clearance.

Data and Resources

Map preview

See this dataset in the Digital Twin Victoria

Additional Information

Field Value
Published (Metadata Record) 02/03/2026
Last updated 02/03/2026
Organisation Australian Federal Government
License License Not Specified
Update Frequency Unknown