The present geology of southern Scandinavia offers the unique opportunity to sample deep and intermediate levels from the same crustal section for both heat flow and heat production. In the central part ot southern Norway, amphibolite facies terranes appear to lie on top of the same deeper crustal formations which crop out on their western and eastern margins. An extensive data set on the geochemistry of all types of rocks in the region culled from the literature is used to derive values for radiogenic heat production for each kind of crustal facies. Using constraints from heat flow data in the same area allows a reliable model of the distribution of crustal heat production. The average heat production of granulite facies terranes is 0.4 &mgr;W/m3, similar to values in other parts of the world. For amphibolite facies rocks, the value is 1.6 &mgr;W/m3. The present shield also includes heat producing element enriched granites formed in later events and the average heat production of presently exposed crust is 2.7 &mgr;W/m3. Using heat flow and radioactivity data from ten stations, the reduced heat flow in the area is 22¿2 mW/m2. This corresponds to the heat flow at the top of 28 km of deep crustal facies, implying that the mantle heat flow is probably as low as 10 mW/m2. Over the whole crustal thickness, the average amount of radiogenic heat is 31 mW/m2. ¿ American Geophysical Union 1987