Acknowledgements
KEA and AP acknowledge the University of Perugia and MIUR (Grant PRIN 2008) for financial support. The Alpine magmatism was the topic of the senior author’s PhD Thesis. Analyses of some key samples of Italian orogenic intrusive and extrusive rocks area reported in Table 2. A more complete compilation can be downloaded at: http://www.unipg.it/~petropg/petrografia, or can be obtained from the corresponding author (AP) on request.