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Structure and petrography of the Valle Mosso pluton, Sesia Magmatic System, Southern Alps

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journal contribution
posted on 01.08.2017 by L. Tavazzani, S. Peres, S. Sinigoi, G. Demarchi, G. Musumeci

The Valle Mosso pluton (VMP) is a Permian granitic body intruded at intermediate to upper crustal levels in the rocks of the pre-Alpine basement of the Ivrea-Verbano Zone and Serie dei Laghi shortly after the end of Variscan orogeny. As a consequence of Triassic to Jurassic rifting and Alpine orogeny, the VMP and surrounding host rocks have been tilted more than 60° from their original Permian polarity. Thus at present day, the VMP offers the rare opportunity to study a roof-to-floor exposure of a granitic pluton, providing insights into pristine geometry of the magma chamber and its relations to the country rocks. This work presents a new drift and solid map of the VMP and its surrounding host rocks at 1:15.000 scale.


Funding for this work was provided by the University of Trieste, FRA 2014 and Ministero dell'Istruzione, dell'Università e della Ricerca [PRIN2015EC9PJ5].