Review of Iberia–Eurasia plate?boundary basins: Role of sedimentary burial and salt tectonics during rifting and continental breakup

We document the role of sedimentary burial and salt tectonics in controlling deformation style continental crust during hyperextension. The Iberian-European boundary records a complex history Cretaceous extension, which has led to development so-called smooth-slope type basins. Based on review available geological constraints (crustal-balanced cross-sections, profile evolution, RSCM thermometer, low-temperature thermochronology) geophysical data (Bouguer anomaly, Moho depth, seismic reflection profiles Vp/Vs velocity models) Tartas, Arzacq, Cameros, Parentis, Columbrets, Mauléon, Basque-Cantabrian Internal Metamorphic Zone basins, we shed light main characteristics this basin. This synthesis indicates that crustal thinning was influenced by two decoupling horizons: middle Triassic prerift salt, initially located between basement cover. These horizons remained active throughout basin formation were responsible for depth-dependent syn-rift tectonics. therefore identify several successive phases involving (a) pure shear dominated thinning, (b) simple (c) breakup. In first phase, distributed resulted symmetric Field observations indicate lower under dominantly ductile conditions at stage. second localised along detachment rooted mantle connecting upwards with salt. During breakup, shoulders recorded occurrence brittle deformation, whereas hyperextended domain predominantly thinning. smooth-slope-type extensional basins intrinsically linked combined deposition thick breakup sequences, regional They induced significant allowed sequence deform high temperature from rifting stages.