Petrogenesis and evolution of the Euganean Magmatic Complex, Veneto Region, North-East Italy

The Euganean magmatic complex consists of basic and differentiated volcanic and subvolcanic rocks, Upper Eocene-Lower Oligocene in age. It is one of the districts in the Veneto Region (North-East Italy) where widespread eruptive activity took place during the Tertiary in relation to tensional tectonics which developed in the Southalpine foreland. On the basis of petrological features, three magmatic series are recognized: alkaline (alkali basalts, trachybasalts, trachyandesites, trachytes), transitional (basalts, trachybasalts, latites, quartz-latites, quartz-trachytes, rhyolites, alkali rhyolites), quartz-tholeiitic (basaltic andesites, dacites). Trace element patterns of the basic rocks are typical of anorogenic within-plate settings, showing significant affinities with ocean island basalts, as also indicated by their isotopic signature (87Sr/86Sr(t) from 0.70319 to 0.70341; εNd(o) from +4.6 to +5.6). Modelling of partial melting for the parental magmas of the three series requires m...