Rare-element pegmatites at Stora Vika are emplaced in gneisses and a metamorphosed carbonate layer. Earlier geochronologic investigations gave a U-Pb zircon age of 1854±5 Ma (2ω), which originally was interpreted to be the age of emplacement, and a Rb-Sr whole-rock isochron of 1777±12 Ma (1ω). The U-Pb zircon age is in conflict with the U-Pb columbite age of 1785±3 Ma (2ω) for another pegmatite from the same swarm. It is argued that the U-Pb zircon age is strongly influenced by inherited zircon and therefore lacks geologic relevance