2 Février 2026
Marine Gelin begins a post-doc at LOMIC
Marine Gelin is a specialist in mineral nanoparticles. She defended her doctoral thesis in October 2025, entitled “Natural colloidal pathways in the volcanic critical zone from hillslope weathering to river systems” at the Institut de Physique du Globe de Paris. During her research, she focused on the processes controlling the formation and export of colloids in watersheds developed on young basaltic substrates, as well as the influence of soil development on the intensity of these flows, from slopes to river systems. This thesis was based in particular on the use of cutting-edge analytical techniques, notably single particle time-of-flight mass spectrometry (spICP-TOF-MS).
Following on from this work, Marine Gelin began a postdoctoral fellowship on February 2, 2026 at LOMIC. Her work is part of the ANR MARGO project coordinated by Stéphane Blain. She is studying the multi-element composition and mass distribution of glacial colloids in different aquatic compartments of the Kerguelen Islands using the same analytical tool (spICP-TOF-MS). This approach is complemented by imaging and elemental mapping acquired using scanning microscopy. This work will produce the first description of the nature of glacial nanoparticles. This new knowledge will provide an understanding of their fate along the glacier-ocean aquatic continuum and their bioavailability to marine microorganisms.