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The granite massif in the Tjärnesjö area, southwestern Sweden, was deformed and metamorphosed under granulite facies conditions in late Sveconorwegian time. The intrusive is dominated by a coarse-grained, megacrystic orthoclase granite. Pb-Pb evaporation datings on single zircons from the granite yield an age of ca. 1.36 Ga, interpreted as the intrusion age. A similar age was obtained on zircons f
