Analysis and modelling of the evolution of permeability in a hydrothermal system

**Description of the project

"This federative project aims to study the alteration phenomena that take place in hydro- or geothermal systems. The approach is twofold, mineralogical and magnetic properties analysis of the samples and modelling of the kinetics of the alteration reactions in the system. Permeability decreases due to pore clogging through the precipitation of alteration products (mainly silica), and this can lead to system pressurization and eruption. This study will be applied to the Soufrière dome in Guadeloupe, which shows signs of unrest since 2018, and for which we already have fluid flow models and geophysical tomography. The expected results of the project are: the spatio-temporal behavior of weathering and silicification of the dome, the consequences on fluid flow, de-magnetization of rocks, pore pressure and mechanical behavior of the dome."