My research seeks to better understand how the Earth has maintained habitable conditions for millions of years. For this, I examine how the volatile species (H2O, CO2, halogens, N, S) are exchanged between the Earth's surface (hydrosphere, atmosphere) and its deeper interior over time, and how these fluctuations have influenced past climate changes. This is at subduction zones that volatiles are transported from the Earth's surface into its deeper interior to be recycled back to the surface via subduction zone magmatism and beyond (at mantle plumes and mid-ocean ridges). As such, my research mainly focuses on subduction zones (from their inception to their maturation), mantle plumes and mantle processes (mantle flows, mantle heterogeneities...) to better understand the chemical exchanges between the Earth's reservoirs (ocean, atmosphere, lithosphere, asthenosphere...) over geological times. To do this, I combine radiogenic isotopes (Pb, Sr, Nd, Hf) and stable isotopic ratios (B, S, D/H), with trace element geochemistry and in situ volatile analyses in tiny pieces of glasses and mineral-hosted melt inclusions, in tandem with field work and petrographic observations. I also collaborate with internationally renowned scientists, that are experts in numerical modeling, HP experiments, geochemistry, petrography and geophysics from all over the world, with the aim of making significant advances in our understanding of past and modern subduction zones and their influence on volatile cycling and Earth's habitability.