• Acronyme :
  • Référence :
  • Domaine de recherche :
    Sciences de la Terre et de l'Univers
  • Région :
    Subantarctique, Kerguelen
  • Site :
    OPGC :
  • Responsable du projet :
    Guillaume Damien

Fluids and magmas transfers across the lithosphere of Kerguelen

Kerguelen corresponds to a unique geodynamic context and geological history, with no current equivalent on Earth, a contemporary analogue of the formation of the first continents 4 billion years ago. The study of the productions, the migrations and the emplacement of differentiated magmas in an oceanic context, the characterization of alteration processes (serpentinization) and mantle fertilization, the distinction in the microtectonics between local magmatic causes and regional incidences of the oceanic plate dynamic as well as the geometry of the different parts of the lithosphere and fluids circulations between them allow to provide constraints to clarify the current geodynamics and the scenario of the formation of the first continents on Earth. The current geographical situation is also strategic to constrain the climatic evolution of the last millions of years by studying the dynamics of erosion of the rocks of the archipelago and matter transfers towards the ocean.