Abstract
Volcanic rocks of dacite and trachyte composition intrude, mainly in the form of dykes, the crystalline basement of the Serbo-Macedonian massif, north of the village Neo Petritsi, in the Kerkini Mountains, Central Macedonia, Greece. They belong to the high-K calc-alkaline to shoshonite series with volcanic arc to post-collisional characteristics. Also, they show features of subduction-related magmas (high LIL/HFS element ratios). REE abundances and disequilibrium mineral textures suggest magma mixing processes for the generation of the studied rocks. 40Ar/39Ar age measurements on sanidine phenocrysts yielded about 12 Ma for the trachytes. Therefore, they are considered among the oldest Neogene to Quaternary volcanic products in the Aegean region that have been related to extensional movements.
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