Geophysics and long-term deformation modeling; geodesy and short-term deformation modeling; photogrammetry; analogue modeling; numerical modeling; gravimetry; structural geology
Elodie Brothelande’s research focuses on surface deformation of volcanic edifices at different time scales. She uses deformation data to constrain analogue and numerical models, considering different types of mechanical behaviors for the crust.
During her PhD, she worked on the resurgence of Siwi caldera (Vanuatu), hosting one of the fastest growing dome on Earth. Form the combination of a great variety of data (structural analysis, photogrammetry, geophysical methods and deformation modeling), she characterized the Yenkahe structure and formation mechanism, as well as the destabilization hazards resulting from the uplift. The dome long-term (~1000 yrs) uplift was explored using analogue and finite-element elastoplastic modeling, which both agreed on the existence of a shallow source causing the resurgence (1-2 km deep).
After her PhD, she worked as a postdoc for the University of Miami to study interactions between neighboring volcanoes in Japan and in the Galapagos, using GPS and InSAR data to constrain multiple-source elastic numerical models.
At DTM, she will also focus on short-term deformation, in order to better understand the relationship between deformation and eruptions. For that purpose, she wants to better take into account the reality of rock deformation and fracturing processes using damage models. Constrained by both deformation and seismicity, these models characterize the evolution of mechanical parameters around magma chambers, depending on time and reservoir load history.