Dickson e Scott 1997

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15. Interpretation of aerial gamma-ray surveys - adding the geochemical factors
	Introduction
	Geochemistry of the radioelements (K, U & Th)
	Potassium
	Uranium
	Thorium
	Radium
	Distribution of radioelements in rocks
	Distribution of radioelements in soils
	Soils in situ over parent rocks
	Soils affected by other than in-situ weathering
	Regolith related materials (calcrete, laterite, ferricrete, pisoliths, gossans)
	Summary
	Effects of mineralisation processes on radioelement distribution
	Uranium & thorium deposits
	Granophile deposits
	Porphry Cu-Au mineralisation
	Gold deposits
	Stratabound polymetallic mineralisation
	Summary - radioelement signatures of mineralisation
	Applying the knowledge to interpretation of aerial gamma-ray surveys
	Conclusions
	Acknowledgments
	References