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Équipes de recherche

Systèmes volcaniques


"Improved understanding of volcanic eruptions from a multidisciplinary study of volatiles dissolved in magmas and their degassing at the surface"



Coordinateur du projet : Dr Patrick Allard (LPS (UMR9956 CNRS-CEA) devenu SIS2M (UMR3299 au 01/01/2010). Rattaché à l’IPGP en 2010)


VOLGASPEC is a multidisciplinary project of basic research in Volcanology coordinated by Dr. Patrick Allard (CNRS). It has associated several research teams from France (LPS, IPGP, La Reunion Univ., LMMP-Paris 6 Univ., LMV-OPGC), Italy (INGV, Palermo Univ.) and the United Kingdom (Cambridge Univ.). The project began in January 2007 and has lasted 48 months. It benefited from an ANR funding of 300 k€, for a cumulated cost of about 3 310 k€.

Improved understanding of how volcanoes work and forecasting of their eruptions is a challenge for basic research, but also a requirement for risk mitigation in densely populated volcanic regions worldwide. The objective of VOLGASPEC project has been a better understanding of the magma degassing processes that control the dynamics of volcanic eruptions. Indeed, main driving force of eruptions is the migration and expansion of gas bubbles which form in magmas, by exsolution of their dissolved volatile components (water, CO2, sulphur, chlorine, fluorine), and then escape as volcanic gases at the surface. Studying the behaviour of these components in magmas at depth and in volcanic gas emissions, with the use of modern tools, can thus provide key information on how volcanoes work. In that perspective, the VOLGASPEC project has associated French (CNRS, Universities), Italian and British research teams for studying, through a multidisciplinary approach, both the solid and gaseous products of a few volcanoes in eruptive activity, fed with different magma types.