Geological and structural map of the area between Golo and Tavignano Valleys (Central Corsica)

The area between Golo and Tavignano valleys (Lat. 42°20’N, Long. 9°10’E) in Central Corsica is characterized by the occurrence of continental metamorphic units belonging to the Lower Units of the Alpine Corsica. These units, also known as Corte Slices, represent the fragments of the European continental margin involved in the continental subduction and the subsequent collision, both resulting from the closure of the Ligure-Piemontese oceanic Basin. These units are thus characterized by a complex polyphased deformation history developed under blueschists to greenschists metamorphic facies conditions during the Late Eocene - Early Miocene time span. In the study area, the Corte Slices have been investigated by a multidisciplinary approach consisting of a detailed mapping associated to meso- and microstructural analyses and estimate of the P-T conditions of the metamorphic events. The 1:10.000 scale geological map illustrates the results of this approach that has provided a detailed snapshot of the stratigraphic and structural analysis of the Corte Slices (Di Rosa et al., 2017). The structural setting of the area is characterized by a polyphased deformation history: within the Corte Slices, three folding phases are recognized at all the scale of observation (D1, D2 and D3). The D1 produces F1 sheath folds and a S1 foliation, almost completely transposed by the D2 phase that is characterized by F2 isoclinal folds with a subvertical axial plain foliation, a S2 foliation and an L2 stretching lineation. The D3 phase is associated to F3 folds with a subhorizontal axial plain foliation. A post-D3 brittle deformation phase is associated to the Central Corsica Shear Zone (CCSZ), a strike-slip faults system that cuts all the previous structures.