Interpreting gamma radiometrics in the Northern Territory

Abstract

Formalisation of guidelines for interpreting radiometric images of the regolith in the NT has been made possible with the recent AWAGS calibration flights by GA, following a series of calibration measurements on test sites across the NT using spectrometer at ground level. In the first instance, objects dominated by potassium can be firstly considered as clay. Image objects dominated by thorium can firstly considered as duricrust. Similarly, image objects dominated by uranium can be firstly considered as carbonaceous ground. Demonstrating these guidelines on the the radiometric image of the NT gives immediate meaning to much of the area. Interpreters are invited to apply them any over radiometric image of the regolith.