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Porphyry copper deposits are not restricted to volcanic arcs alone and have been identified in extensional tectonic settings from across the world. Post-collisional crustal extension can result in areas of elevated heat flow generating small-volume, calc-alkaline to shoshonitic magmas, some of which are associated with exotic metal-bearing porphyry – epithermal systems. The Maronia Magmatic Corridor is a NE-trending belt of post-collisional Oligocene high-K calc-alkaline to shoshonitic plutons that intrude the northern Rhodope Core Complex in northeastern Greece. It is host to several documented occurrences of post-collisional porphyry – epithermal mineralisation associated with the intrusion of co-genetic evolved porphyritic dykes and stocks. By reconstructing the tectono-magmatic evolution of post-collisional magmatism along the Maronia Magmatic Corridor, this thesis aims to explore the processes governing porphyry – epithermal mineralisation in extensional tectonic settings.