Hydrothermally altered and (copper) mineralized porphyritic intrusions in the Serbo-Macedonian Massif (Greece)

Within the pre-alpidic consolidated Serbo-Macedonian Massif several paleogene hydrothermally altered porphyritic stocks have been found and investigated. The subvolcanic activity was ascertained to be confined to three main centers. Hydrothermal alterations within the stocks and as haloes in the surrounding country rock are widespread, the phyllic and the propylitic alteration facies being predominant, whereas the potassic facies seems to be lacking. Geochemical investigations in the Krousia Mountains and in the Eastern Chalkidiki traced in some of the altered stocks and alteration haloes a sulfide mineralization of porphyry copper type with pyrite, chalcopyrite, galena, sphalerite and some gold. The economic value of this metallogenic province is not yet fully established.