Pathways of oxidation state and sulfur release and the shift from low-energy to highly explosive basaltic eruptions at Mt. Etna volcano (Sicily, Italy)

Roberto Moretti, Université de Paris, Institut de Physique du Globe de Paris - OVSG, Gourbeyre, Guadeloupe, Nicole Metrich, Institut de Physique du Globe, Paris Cedex 05, France, Valeria Di Renzo, ARPA Campania, Naples, Italy, Patrick Allard, CNRS, Paris 05, France and Alessandro Aiuppa, Università di Palermo, Dipartimento di Scienze della Terra e del Mare (DiSTeM), Palermo, Italy