Fig. 3From: Radiogenic heat production in granitoids from the Sierras de Córdoba, ArgentinaSamples with their values (each spot) and IDW interpolation (background shading), proposed by Rybach (1988) as the most appropriate interpolation for any variable related to heat production and geothermal mapping. a Radiogenic heat production (µW/m3). b Concentrations of K (%). c Concentrations of Th (ppm). d Concentrations of U (ppm)Back to article page