Linkage of crustal deformation between the Archaean basement and the Proterozoic cover in the Peräpohja Area, northern Fennoscandia

•A basal detachment zone recognised in the Palaeoproterozoic Peräpohja Belt, Northern Finland.•Close relationship between the Proterozoic cover and the Archaean basement.•Structural inheritance, hard- and soft-linked relationships.•Horst-graben topography of the basement attributed to rifting initiated at 2.45 Ga.•Structural control over mineralization.