Structural features and emplacement of the late Svecofennian Perniö granite sheet in southern Finland

The 1840-1830 Ma old Perni granite occupies the southern margin of the Sauvo-Perni granite area located in the western part of the late Svecofennian granite-migmatite zone in southern Finland. The S-type Perni granite is light to dark red, medium-to coarse-grained with euhedral K-feldspar phenocrysts forming the porphyritic texture of the granite.