If you read all that and still feel game for more there's some mad bastard willing to tolerate PhD candidates that want to mix geology and big radiometric data, he even reckons (and I quote):
The integration of these different lines of research has the potential to improve greatly our ability to extract geological information from radiometric datasets for exploration purposes.
Guidelines for radioelement mapping using gamma ray spectrometry data International Atomic Energy Agency (2003)
https://www-pub.iaea.org/mtcd/publications/pdf/te_1363_web.p...
Or go full Aussie, Aussie, Oy, Oy, Oy
https://www.ga.gov.au/scientific-topics/disciplines/geophysi...
and read the three publications linked at bottom and get the high res A0 wall map for the dorm room !
( A GUIDE TO THE TECHNICAL SPECIFICATIONS FOR AIRBORNE GAMMA-RAY SURVEYS Grasty + Minty
https://d28rz98at9flks.cloudfront.net/14861/Rec1995_060.pdf
and the other two )