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 potassium grid has a cell size of 0.00042 degrees (approximately 43m) and shows potassium element concentration of the Barton Airborne Magnetic Radiometric and DEM Survey, SA, 2017 in units of percent (or %). The data used to produce this grid was acquired in 2017 by the SA Government, and consisted of 111668 line-kilometres of data at 200m line spacing and 60m terrain clearance.
Maintenance and Update Frequency: notPlanned
Statement: This GSSA Barton percent Potassium grid geodetic is an airborne-derived radiometric potassium grid for the Barton Airborne Magnetic Radiometric and DEM Survey, SA, 2017. The survey was acquired under the project No. 1284 for the geological survey of SA. The grid has a cell size of 0.00042 degrees (approximately 43m). A total of 111668 line-kilometres of data at a line spacing of 200m and 60m terrain clearance were acquired to produce this grid. This radiometric potassium grid shows potassium element concentration of the Barton Airborne Magnetic Radiometric and DEM Survey, SA, 2017 in units of percent (or %). Noise-adjusted singular value decomposition (NASVD) has been applied to the data. NASVD is a spectral component analysis procedure for the removal of noise from gamma-ray spectra. Details of the specifications of individual airborne surveys can be found in the Fourteenth Edition of the Index of Airborne Geophysical Surveys (Percival, 2014). This Index is also available online at http://pid.geoscience.gov.au/dataset/79134.
Percival, P.J., 2014. Index of airborne geophysical surveys (Fourteenth Edition).