Moreno Martín, DianaVicente Muñoz, Gerardo DeDíez Fernández, RubénFernández Rodríguez, CarlosGómez Barreiro, Juan2023-06-222023-06-222022-11-200040-1951, online ISSN: 1879-326610.1016/j.tecto.2022.229601https://hdl.handle.net/20.500.14352/72566CRUE-CSIC (Acuerdos Transformativos 2022)Interference between orogenic systems and deformation phases within them may lead to reworking and reactivation of previous structures. The eastern sector of the Spanish-Portuguese Central System holds evidence of two orogenic systems, Variscan and Alpine, plus a stage of Permian extension. We perform an integrated structural analysis to identify reworking and reactivation processes throughout the geological record. The Variscan record starts with crustal thickening (D1; E-verging overturned folds). A second phase features the intra-orogenic collapse of an overthickened crust (D2; top-to-the-SE ductile extensional shear zone), which produced intense structural reworking at the core of the shear zone and moderate reworking at its hanging wall. During subsequent strike-slip tectonics, crustal thickening parted transpressional deformation into a dextral shear zone and upright folds (D3). Variscan deformation did not reactivate previous structures, but exploited a weak rheological boundary defined by contrasted lithologies (sedimentary versus igneous rocks) to accommodate D2 shearing. Reactivation played a role afterwards: Variscan strike-slip shear zone acted as a transfer fault to accommodate Permian extension (post-orogenic collapse), and then Alpine contraction. The Permian extension record is blurred by Alpine inversion, although the trend of Alpine structures in Central Iberia, and the Spanish-Portuguese Central System, may result from Permian structural inheritance.engAtribución-NoComercial-SinDerivadas 3.0 Españajournal articlehttps://doi.org/10.1016/j.tecto.2022.229601open access551.24(460)Extensional collapseTectonic inversionCollisional orogenIntraplate orogenIberian MassifGeodinámica2507 Geofísica