Date/heure
Date(s) - 14 février 2023
13 h 00 min - 14 h 00 min
Catégories
The sprawl of the Peloponnese or how I learned to stop worrying and love gravity tectonics
Résumé: The Peloponnese (Southern Greece) belongs to the External Hellenides, an alpine orogeny that reached the late phase of its evolution during Miocene times. As it is the case for most of the alpine belts spread along the southern Eurasian margin, its deformation is now dominated by the gravitational collapse of its topography and the subsequent exhumation of deep metamorphic units. Southern Greece, however, is simultaneously located on the overriding plate of the Hellenic subduction, where the slab rollback already delaminated the Aegean part of the chain by a factor of two or more in the Neogene. The Peloponnese, still at a less advanced, more brittle stage of collapse, is therefore a remarkably suitable playground for studying the competition between volume and boundary forces in the early stages of orogeny dismantling.