Volcanoes : from magma genesis to surface emissions
Volcanic activity is one of the most obvious and spectacular manifestations of the transfer of matter and energy from the Earth’s inner layers to the outer envelopes (surface crust, hydrosphere and atmosphere) through the lithosphere. It also represents a major natural hazard for more than 15% of the world’s population who, in various regions of the globe, live within 100 km of an active volcano. Finally, it is capable of affecting ecosystems on a regional scale, and even the climate on a global scale.
At the interface between the inner and outer Earth, volcanoes are complex natural systems involving a great diversity of physical and chemical processes from the genesis of magmas to the emission of volcanic fluids and rocks to the surface.
The research conducted by the team is grouped around three main themes
magmatic sources/storage, upwelling/transfer and interactions with hydrothermal systems, magmatic degassing and eruptive processes
- Characterization of magmatic sources and pre-eruptive magma storage conditions
- Interactions between magmatic fluids and hydrothermal systems (gas-water-rock) and alteration of volcanic structures
- Relationships between magmatic outgassing processes, volcanic gas and aerosol composition and flux, and eruptive styles
- Probing of deep and superficial internal structures of volcanoes by geophysical tomography (electrical, geodesic, gravimetric, muonics..)
- Long-term evolution of magma storage zones and volcanic edifices
- Importance of construction/destruction phases in the evolution of volcanic edifices
- Impact of eruptions on the environment and populations, hazards and risks
- Development of new tools for monitoring, prediction and warning in connection with the IPGP Observatories
- Resources in volcanic environment: geothermal energy, metallogeny…