Triassic volcanic rocks of some type-localities from the Hellenides

The mineral and whole-rock geochemistry of Triassic volcanic rocks from some type-localities of the Hellenides (Avdela, Northern Pindos; Divri, Othris; Steni, Euboea: Atalanti; Vardoussia; Koziakas; Argolis-peninsula) are consistent with emplacement in extension-related regimes. The parental magmas were formed by the melting of heterogeneous upper mantle and underwent magma mixing. In places (e.g. Northern Pindos and Euboea) the magmas were emplaced onto an ocean floor; elsewhere (e.g. Vardoussia, Koziakas, Aralanti) they intruded through the continental crust where the melts underwent differentiation and contamination. The dacites of Argolis probably represent differentiates of such contaminated melts.