Potassium is high in hydrothermally altered rocks near Arizona copper deposits, but there is no corresponding increase in thorium. The potassium anomalies are large enough to be detected by truck-mounted (and possibly airborne) gamma-ray spectrometer, and may be distinguishable from anomalies due to unaltered potassium-rich intrusives by their higher potassium-thorium ratios.

First Page Preview

First page PDF preview
You do not have access to this content, please speak to your institutional administrator if you feel you should have access.