Exhumation sequence of the basement thrust units in the west centralPyrenees. Constraints from apatite fission track analysis
Compilation of new and published apatite fission track data along a transect of the west central Pyrenees shows that exhumation across the Partial Annealing Zone ~120 60degC) started during the mid Eocene in the North Pyrenean Zone and migrated southward to reach the southern edge of the Axial Zone during the early Miocene. An early Miocene stage of exhumation is also detected in the northern part of the Axial Zone, indicating a late pop up thrust reactivation of the Axial Zone.