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

Mediterranean trade of the most widespread Roman volcanic millstones from Italy and petrochemical markers of their raw materials

“…With regard to the chemical composition, general common features are K 2 O/Na 2 O ratio around 1, the absence of Nb-Ta negative anomalies and the presence of Q and Hy in the CIPW norm (Milani et al, 1999). As described by Capedri et al (2000), trachytes of individual quarrying areas are chemically quite homogeneous, but there is a rather wide chemical variability among the different sites, which allows a good differentiation within the main Roman sources.…”

Tertiary-Quaternary subduction processes and related magmatism in the Alpine-Mediterranean region

“…The mafic volcanic rocks show an OIB-like composition without any sign of subduction-related component. De Vecchi & Sedea (1995) and Milani et al (1999) interpreted this volcanism as related to lithospheric extension in the Southern Alps (Zampieri 1995). In contrast, Macera et al (2003) invoked slab detachment and the ensuing rise of a deep mantle plume into the lithospheric gap.…”

“…Alkaline mafic rocks ('anorogenic' type) crop out only south of the Eastern Alps, in the Veneto region (De Vecchi & Sedea 1995;Milani et al 1999;Macera et al 2003; Fig. 1).…”

Ultramafic xenoliths from the Veneto Volcanic Province (Italy): Petrological and geochemical evidence for multiple metasomatism of the SE Alps mantle lithosphere

“…During the Tertiary, convergence between Africa and Europe induced a south-eastward subduction of the European plate underneath the African plate, giving rise to the Alpine belt, and subsequently to numerous calc-alkaline intrusions and subalkaline dykes of mainly Oligocene age. In the south Alpine eastern foreland (e.g., in the Veneto region), however, an extension-related magmatism of mainly basic composition occurred from late Paleocene to early Miocene times (De Vecchi and Sedea, 1995;Zampieri, 1995;Milani et al, 1999). According to Maffei et al (2003), the OIB-like alkaline basaltic volcanism in the Veneto region could be related to mantle diapirism.…”