The Alnö complex: tectonics of dyke emplacement

The model of dyke emplacement proposed by v. Eckermann could not be confirmed by the present study. A new model is suggested, involving up-doming of the wall-rock due to the intrusion of magma (accompanied by the formation of radial dykes and two sets of cone sheets), followed by subsidence (formation of sövite ring dykes and two other sets of cone sheets).