Deciphering the Cenozoic Exhumation History of the Eastern Pyrenees Along a Crustal‐Scale Normal Fault Using Low‐Temperature Thermochronology

The timing of transition between the contractional and extensional regimes along Pyrenean range remains debated. Compared to its central western parts, eastern part chain was significantly affected by tectonics mostly related opening Gulf Lion. Têt normal fault is best example this tectonic activity, with topographic reliefs above 2,000 m in footwall. In study, we synthetized previous thermochronological data performed new (U-Th)/He fission track dating Eastern massifs. Output apparent exhumation rate thermal modeling hanging wall highlight a rapid (0.48 km/Ma) cooling (∼30°C/Ma) phase 38 35 Ma, followed slower exhumation/cooling afterward. footwall, subsequently propagated westward during Priabonian (35–32 Ma), upper Oligocene lower Miocene (26–19 Serravallian-Tortonian times (12–9 Ma). These outcomes suggest that southward thrusting ended at different stages, propagation deformation toward West Miocene. We propose onset extension Pyrenees occurred late period, contemporaneously large-scale rifting episode recorded Western Europe. After event, activity appear mainly controlled