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The 1650–1540 Ma rapakivi granites and associated basic rocks (e.g. gabbro–anorthosites) in southern Finland intrude the local juvenile Paleoproterozoic crust with little isotopic contrast to the contemporary mantle. Conventional isotopic studies have not been able to provide a satisfactory answer to the long-running controversy over the sources involved in their petrogenesis. In situ zircon laser...

journal of petrology

Re-evaluation of Rapakivi Petrogenesis: Source Constraints from the Hf Isotope Composition of Zircon in the Rapakivi Granites and Associated Mafic Rocks of Southern Finland