%0 Journal Article
%T Sinclinal de Vila Velha de R車dˋo (Zona Centro-Ib谷rica, Portugal): litostratigrafia, estrutura e modelo de evoluˋˋo da tect車nica Varisca
%A Metodiev
%A D.
%A Romˋo
%A J.
%A Dias
%A R.
%A Ribeiro
%A A.
%J Comunicaˋˋes Geol車gicas
%D 2009
%I Scientific Electronic Library Online
%X the revision of the geological mapping (scale 1:25 000) of the vila velha de r車dˋo syncline revealed a succession whose data ranged from the early ordovician to the lower silurian, similarly to the d3 am那ndoa-carvoeiro sinform and new elements about the variscan deformation. early overthrusts, reactivated forethrusts with duplex geometry with ne facing, backthrusts and backfolds, folds with axial cleavage and linear structures were also observed; all of these deformation shows progressive character, in coaxial regime, resulted from the main phase d1 of the variscan orogeny. this deformation matches maximum ne-sw compression which can create thin-skinned d谷collement in depth and triangular structures of various scales. the syncline is located between two flower structures in regional scale and is affected by variscan lateral ramps reactivated in dextral and sinistral strike-slip faults during the action of the late-variscan episodes and of the alpine orogeny.
%K lithostratigraphy
%K ordovician
%K silurian
%K variscan deformation
%K forethrusts
%K backthrusts
%K triangular structure
%K late-variscan strike-slip faults.
%U http://www.scielo.gpeari.mctes.pt/scielo.php?script=sci_abstract&pid=S1647-581X2009000100001&lng=en&nrm=iso&tlng=en