Detalhes bibliográficos
| Resumo: | Abstract The early evolution of SW Europe Variscides started by opening of the Rheic ocean at 500 Ma, splitting Avalonia from Armorica/Iberia. Subduction on the SE side of Rheic generated the Paleotethys back-arc basin (430–390 Ma, splitting Armorica from Iberia), with development of Porto-Tomar-Ferreira do Alentejo (PTFA) dextral transform defining the boundary between continental Armorica and Finisterra microplate to the W. Obduction of Paleotethys was followed by Armorica/Iberia collision and emplacement of NW Iberian Allochthonous Units at 390–370 Ma, whereas toward the west of PTFA, there was antithetic ophiolite obduction (Beja-Acebuches and Rheic ophiolites plus Finisterra continental slices) on top of Ossa-Morena Zone, with simultaneous development of eclogites and orogenic magmatism under a flake–double wedge tectonic regime. Continued convergence (<370 Ma) proceeded by intracontinental deformation, with progressive tightening of the Ibero-Armorican Arc through dextral transpression on the Cantabrian Indentor, from Iberia to Armorica. The proposed model is discussed at the light of the driving mechanism of ‘‘soft plate tectonics.’’ |
|---|
| Autores principais: | Ribeiro, António |
|---|
| Outros Autores: | Munhá, José; Dias, Rui; Mateus, António; Pereira, Eurico; Ribeiro, Luísa; Fonseca, Paulo; Araújo, António Alexandre; Oliveira, Tomás; Romão, José; Chaminé, Helder; Coke, Carlos; Pedro, Jorge |
|---|
| Assunto: | Rheic Suture Iberia Obduction Subduction Collision Variscan Finisterra |
|---|
| Ano: | 2010 |
|---|
| País: | Portugal |
|---|
| Tipo de documento: | artigo |
|---|
| Tipo de acesso: | acesso aberto |
|---|
| Instituição associada: | Universidade de Évora |
|---|
| Idioma: | inglês |
|---|
| Origem: | Repositório Científico da Universidade de Évora |
|---|