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Abstract
Age measurements on Svecokarelian rocks of the Norvijaur area demonstrate (a) that the microcline granite, intersecting a metasupracrustal belt, has a whole-rock Rb-Sr age of 1915 ± 20 Ma with an intercept of 0.7025 ± 0.0007 and (b) that the gneissic granodiorite, lately interpreted as a basement to the above metasupracrustals, has a U–Pb zircon age of 2010 ± 40 Ma and a Rb-Sr whole-rock age of 1925 ± 120 Ma with an intercept of 0.7033 ± 0.0006.