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Two large intrusive massifs of different ages on the Fennoscandian Shield are exemplified to analyze the distribution pattern of megafractures. Megafractures are rectilinear tectonic dislocations varying in length from hundreds of metres to several kilometres. Megafracturing was analyzed on rapakivi granites from the Neoproterozoic Salmi multi-phase massif. Another goal of the project was to study the Paleoproterozoic Ropruchei gabbrodolerite sill. Topographic maps and satellite images were used for analysis of me...