Osmium and lead isotope investigation of magmas within the long-lived Pichincha Volcanic complex from the Northern Andean Volcanic zone (Ecuador)

Abdelmouhcine Gannoun1, Pablo Samaniego1, Hervé Martin1, Pierre Schiano1, Silvana Hidalgo2, François Nauret1 and Jean-Luc Le Pennec3, (1)University Blaise Pascal Clermont-Ferrand II, Clermont-Ferrand, France, (2)Instituto Geofisico EPN - Ecuador, Quito, Ecuador, (3)Laboratoire Magmas et Volcans, Clermont-Ferrand Cedex, France