| Regimes de deformação do autóctone da área de Viana do Castelo - NW de Portugal (ZCI; Cadeia Varisca) |
| Pamplona J. & Ribeiro A. |
| Apresentado no IV Congresso Nacional de Geologia, Porto, 1995 Publicado nas Memórias nº4 do Museu e Laboratório Mineralógico e Geológico da Fac. de Ciências da Univ. do Porto, 287-292, 1995 |
Abstract:
| The lithologies of this area belongs to the Aucthocthonous of
CIZ. Metamorphic's analysis evidence the isogrades obliteration
of hercynian plutonic metamorphic final episode to the Barrovian
earliest episode, on the South sectors, which contrast with the
coexistence of these two episodes in Carreço. D1 is characterized, on a first stage, by a transpressive regimen with sinistral component, however, at the end of D1 attend to the passage to a tangential deformation regimen towards East. D2 is characterized by the passage of a pure shear regimen to a tangential deformation regimen towards West. D3 is conditioned by sinistral transpression. |