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Crustal deformation and submarine canyon incision in a Meso-Cenozoic first-order transfer zone (SW Iberia, North Atlantic Ocean)
2013, TectonophysicsCitation Excerpt :A second hinge zone bounded by the Tagus and Nazaré Transfer Zones (the Estremadura Spur) can be also considered to have separated the Alentejo and Peniche Basins to the North, as previously suggested by Vanney and Mougenot (1990) for the Nazaré Fault Zone (NFZ). An additional proof of the complex geometry of transfer zones is shown by recorded earthquake focal mechanisms (Geissler et al., 2010; Gràcia et al., 2003; Osete et al., 2011; Schott et al., 1981), which suggest the MPFZ to terminate at the Horseshoe Abyssal Plain as a contractional horsetail splay, in similarity to most transpressive segments (e.g. Cunningham and Mann, 2007). In fact, the discrepancy between earthquake data and the negative flower structure observed upslope suggests the modern MPFZ to comprise an alternating releasing–restraining bend along its length, a character of major importance to the geohazard assessments in Southwest Iberia.
The evolution of Iberia during the Jurassic from palaeomagnetic data
2011, TectonophysicsCitation Excerpt :Palaeomagnetic data from these sites are summarized in Table 1. Three palaeomagnetic studies have been carried out on the Messejana–Plasencia dyke (Schott et al., 1981; Perrin et al., 1991; Ortas et al., 2006). The three studies give a mean pole that does not differ statistically from the others, but the only one that fully meets our selection criteria is the one proposed by Ortas et al. (2006).
Thermal impact of the break-up of Pangea on the Iberian Peninsula, assessed by thermochronological dating and numerical modelling
2009, TectonophysicsCitation Excerpt :The Messejana–Plasencia dyke running 530 km across Iberia, from southern Portugal to Central Spain, is a clear example of a large scale intrusion (Fig. 1). This dyke was injected by a series of multiple magmatic pulses, related to the Central Atlantic Magmatic Province (CAMP), along a major wrench fault system between 160 and 200 Ma (Schermerhörn et al., 1978; Schott et al., 1981; Sebai et al., 1991) (Fig. 1). Most of the ages we compiled above record total/partial thermal resetting of various thermochronological systems as a result of one or more thermal episodes throughout the Mesozoic.