Zircon geochronology of basement rocks from the Pelagonian Zone, Greece: constraints on the pre-Alpine evolution of the westernmost Internal Hellenides

摘要: The Pelagonian Zone of Greece is the westernmost segment Internal Hellenides comprising widespread crystalline basement exposures granites and orthogneisses. We dated these rocks in order to identify major crust-forming episodes understand evolutionary history area. In our study we investigated granites, gneisses, meta-rhyolites mylonites from occurrences Zone. applied single-zircon dating techniques such as Pb–Pb evaporation, conventional U–Pb SHRIMP. majority gave Permo-Carboniferous intrusion ages, thus emphasizing importance this event for Greece. Triassic ages were obtained, however, a meta-rhyolite western two eastern These are interpreted reflect magmatism accompanying early rifting that led subsequent opening Pindos Ocean west Meliata east geochronological results demonstrate magmatic during which most formed predominantly pre-Alpine age.