We are seeking a candidate for a post-doctoral project investigating the mechanics governing the growth, evolution and eruption of large silicic magma bodies; for further information, here.
Volcano observatories monitor volcanoes for signals that might indicate a forthcoming eruption. However, this requires accurate knowledge of the subsurface processes causing the signals observed and recorded at the surface. Ground-surface displacement measurements are a common volcano-monitoring tool, but the links between surface displacements and eruption remain enigmatic, and the ability to distinguish signals that will precede an eruption from those which will not is lacking. Much progress has been made in the interpretation of volcanic geodetic signals over the last decade. The use of Finite Element Analysis (FEA) allows for more realistic models that incorporate viscoelastic effects, which in turn strongly influence whether a magma reservoir tends towards eruption or continued magma storage, through viscous accommodation of the growing reservoir in the host-rock. To date models have relied on steady-state temperature distributions to assign the viscosity distribution within the crust a priori. In reality, the subsurface temperature distribution is a function of the crust intrusive history, hence of both time and space. Consequently, the mechanical properties of the host-rock will also be altered, and this will have important impacts on the eruption or storage potential of a magma reservoir as well as the spatial and temporal distribution of associated surface deformation. The goal of the project is a model framework that accounts for time-dependent thermal and mechanical properties resulting from repeated magmatic intrusions. This will allow for better quantification of the links between magma supply, surface displacements and eruption potential, and improved constraints on geodetic eruption precursors.
Applicants must hold a PhD degree in Volcanology or closely related fields and should have a strong background in continuum mechanics and numerical modelling applied to earth-science problems. Experience with COMSOL Multiphysics would also be appreciated.
Applicants are requested to send a CV, a letter of motivation, the names of two referees, and the pdfs of up to five publications to the ClerVolc administration manager, Socheata Sean (Socheata.SEAN@univ-bpclermont.fr). Applications will be accepted until the 15 November 2015.
Applicants do not need to speak French.
Contact and further information on the project: Thierry Menand (T.Menand@opgc.univ-bpclermont.fr), Jean-Luc Froger (J.L.Froger@opgc.univ-bpclermont.fr), Valérie Cayol (V.Cayol@opgc.univ-bpclermont.fr).
In the event of additional enquiries or problems, please contact ClerVolc administration manager Socheata Sean (Socheata.Sean@univ-bpclermont.fr).
The ClerVolc (Clermont-Ferrand Centre for Volcano Research) consortium involves six laboratories of Blaise Pascal University in Clermont-Ferrand, France (Collaboratrices of Earth Science ‘Magmas et Volcans’, Particle Physics, Physical Meteorology, Social and Cognitive Psychology, Mathematics, Computer Science), the Observatoire de Physique du Globe at Clermont-Ferrand, and the French Geological Survey (BRGM). The consortium, which is led by P. Schiano director, T. Druitt scientific coordinator, has received funding for a collaborative research programme from the French government ‘Laboratories of Excellence’ initiative. The programme addresses fundamental questions in the field of magma generation, volcano dynamics, volcanic hazards and volcanic risk.