"Natural Gamma Ray Spectroscopy makes it possible to measure 3 additional parameters to the single total Gamma Ray measurement made with the standard Gamma Ray device. What are they?"
I have answered that one with
238U, Thorium/Uranium 232Th, Uranium/Potassium 40K, Thorium/Potassium Each different reading indicates a different source of radioactivity as different clays are made up from different radioactive particles.
A follow on question is In addition to representing these 3 parameters on a Natural Gamma Ray Spectroscopy log, there are 3 additional curves that deal with this information in a way that is more useful to the geologist. What do these additional curves show?
