New and revisited paleomagnetic data from Permian–Triassic red beds: Two kinematic domains in the west-central Pyrenees

The Ainsa Fold and thrust oblique zone of the central Pyrenees: Kinematics of a curved contractional system from paleomagnetic and structural data

“…However, sites sampled nearby by Bentham [] in sediments of the same age, although less robust than some of the data by Mochales et al . [], yield CW vertical axis rotations of ~ 20° +/− 10° that are consistent with the existence of a second (Priabonian‐Oligocene) regional CW vertical axis rotational event already solidly documented by multiple authors [ Bentham , ; Pueyo , ; Oliva‐Urcia and Pueyo , ; Oliva‐Urcia et al ., ] and discussed below.…”

“…A pervasive remagnetization characterized by a high intensity reverse magnetic component has been observed in the rocks deformed by regional cleavage [ Oliva‐Urcia and Pueyo , ; Oliva‐Urcia et al ., , , ] and in the samples collected in the northern areas, where pressure solution cleavage is well developed (generally over 20% of shortening). The presumed mechanism for explaining this remagnetization is the liberation and reorientation of the magnetic carrying minerals in the cleavage domains as solution progressed during cleavage intensification [ Evans and Elmore , ; Oliva‐Urcia et al ., ; Elmore et al ., ].…”

“…A recent compilation of paleomagnetic data in Permian‐Triassic red beds of the central western Pyrenees has reported no significant vertical axis rotation of the sites located in the footwall of the Gavarnie thrust sheet in the study area [ Oliva‐Urcia et al ., ]. The same authors describe a slight CW vertical axis rotation of 8°–10° for the Upper Cretaceous paleomagnetic component in the Sierras Interiores (Gavarnie thrust sheet west of the study area) and an average CW vertical axis rotation of 14° for the remagnetized component in the Cretaceous and Paleogene rocks of the Monte Perdido thrust system (Figure ) [ Oliva‐Urcia and Pueyo , ; Oliva‐Urcia et al ., ].…”

Unraveling the Mesozoic and Cenozoic Tectonothermal Evolution of the Eastern Basque‐Cantabrian Zone–Western Pyrenees by Low‐Temperature Thermochronology

“…Early works showed that the Oroz‐Betelu massif belonged to the Iberian side (van der Voo, ), and the Cinco Villas massif to the European side (van der Voo & Boessenkool, ). However, further research on the southern border of the Cinco Villas and Alduides massifs showed a complex pattern of rotations, the interpretation of which is not straightforward (Larrasoaña, Parés, del Valle, & Millán, ; Oliva‐Urcia et al, ; Schott & Peres, ). Larrasoaña, Parés, del Valle, and Millán () proposed a wide domain of distributed deformation at the “plate” boundary, formed by a set of fault‐bounded blocks undergoing differential rotations in which the massifs behaved independently with respect to Eurasia and Iberia.…”

“…Larrasoaña, Parés, del Valle, and Millán () proposed a wide domain of distributed deformation at the “plate” boundary, formed by a set of fault‐bounded blocks undergoing differential rotations in which the massifs behaved independently with respect to Eurasia and Iberia. Oliva‐Urcia et al (), using new and revisited data, emphasized the difficulty in determining the affinity of the Basque massifs by means of paleomagnetic data. Hence, other methods to discern the Iberian or European affinity are needed and will be discussed below.…”