Encontrados 4 documentos, a visualizar página 1 de 1
Thick-skinned inter-plate and intra-plate tectonics in NW and SW Iberia
Ribeiro, A.; Romão, J.; Henriques, S.; Dunning, G.; Ribeiro, L.; Neiva, A.; Munhá, J.; Pereira, E.; Castro, P.In the Abrantes area of the Ossa Morena Zone the NW tip of the Tomar-Badajoz-Cordoba Shear Zone (TBCSZ) stops against the Porto-Tomar-Ferreira do Alentejo Shear Zone (PTFASZ). Basement nappes of Cadomian age were thrust to the NE during the Variscan orogeny. Low intermediate pressure granulites contrast with high pressure eclogite Cadomian assemblages in the axial zone of TBCSZ where we infer the presence of a ...
Variscan ophiolite belts in the Ossa-Morena Zone (Southwest Iberia): Geological...
Ribeiro, A.; Munhá, J.; Fonseca, P. E.; Araújo, A.; Pedro, Jorge; Mateus, A.; Tassinari, C.; Machado, G.; Jesus, A.Abstract At SW Iberia, the boundary between Iberian and South-Portuguese Terranes is traced by a suture recording the closure of Rheic and related oceans through N-NE subduction. The western segment of the suture comprises imbrications of Iberian Terrane Relative Autochthon (Neoproterozoic - Lower Palaeozoic) and Allochthonous Complexes. The Iberian Terrane Relative Autochthon is topped by Lower-Middle Devonian...
Optical dating of clastic deposits generated by an extreme marine coastal flood...
Cunha, P., Buylaert, J., Murray, A., Andrade, C., Freitas. M., Fatela, F., Munhá, J., Martins, A., Sugisaki, S.,Identification of past tsunamis is important for risk assessment and management of coastal areas. Obtaining accurate and precise ages of sediments originating from such extreme marine coastal floods is crucial for a reliable estimation of the recurrence interval of these often devastating events. We present here the results of quartz optical dating and 14C dating of two sites (Boca do Rio and Martinhal) on the ...
A Bacia do Algarve: estratigrafia, paleogeografia e tectónica
Terrinha, P.; Rocha, R.; Rey, J.; Cachão, M.; Moura, Delminda; Roque, C.; Martins, L.; Valadares, V.; Cabral, J.; Azevedo, M. R.; Barbero, L.A “Bacia do Algarve” corresponde, segundo a literatura científica tradicional, aos terrenos mesocenozóicos que orlam o Sul de Portugal, desde o Cabo de São Vicente ao rio Guadiana (~140km), penetrando irregularmente para o interior entre 3 km a 25 km, sobre terrenos de idade carbónica da Zona Sul Portuguesa. O hiato, de aproximadamente 70 milhões de anos, materializado pela discordância angular entre as rochas ...
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