The Arjeplog-Arvidsjaur uranium province contains epigenetic uranium deposits formed at the culmination of Svecofennian orogenesis at about 1750 Ma ago, stratabound deposits in subsequent volcanics and enhanced uranium contents in a wide variety of rock types. The province is situated along the southern margin of an early Proterozoic continent and may have been underlain both by older basement and, more speculatively, by a subduction zone. The movement of uranium is clearly related to processes of magmatism and metamorphism during the Svecofennian orogenesis. Pre-Svecofennian basement is a potential source of uranium.