Аннотация:Heat generation due to decay of long-lived radioactive isotopes is considered in the Earth’s crust of the Archean–Proterozoic and Paleozoic provinces of Eurasia and North America. The heat flow that forms in the mantle is calculated as the difference between the heat f low observed at the boundary of the solid Earth and radiogenic heat f low produced in the crust. The heat regime in regions with anomalously high radiogenic heat generation is discussed. The relationship between various heat f low components in the Precambrian and Phanerozoic provinces has been comparatively analyzed, and the role of erosion of the surface-heat-generating layer has been estimated.