Multi-scale quantification of mobility of iron and chromium in the ophiolite of Chamrousse : Data contribution magnetic

Project description

"Hydrothermal alteration of peridotites on the seafloor alters the content and distribution of iron and chromium in mantelic rocks. This mobility of the elements plays a key role in the production of hydrogen, the acquisition of magnetism and the alteration of chromitites, the main ore of chromium. This project aims to better constrain Fe and Cr fluxes at scales ranging from millimeters to kilometers in the Chamrousse ophiolite. We will couple a geological, petrological and geochemical study of the ultrabasic and basic rocks collected at Chamrousse with magnetic anomaly map surveys acquired on the ground and with a drone. This multi-disciplinary approach will allow us to better quantify the mobility of Cr and Fe during hydrothermal alteration and to develop innovative tools for magnetic mapping at ISTerre. In addition to involving 7 researchers from ISTerre in two different teams with a collaboration with Geolithe, this project is easily achievable in the current context since it is based on the study of a still little studied natural laboratory located on the outskirts of Grenoble."