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Title: Tectonostratigraphy of Middle and Upper Palaeozoic black shales from the Porto-Tomar-Ferreira do Alentejo shear zone (W Portugal): new perspectives on the Iberian Massif
Other Titles: Tectonostratigraphie du Paleozoïque moyen-supérieur de la bande de cisaillement Porto-Tomar-Ferreira de l’Alentejo (Ouest du Portugal) : nouvelles perspectives pour le Massif Ibérique
Authors: Chaminé, H. I.
Gama Pereira, L. C.
Fonseca, P. E.
Fernandes, J. P.
Rocha, F. T.
Flores, D.
Pinto de Jesus, A.
Gomes, C.
Soares de Andrade, A. A
Araújo, A. A.
Keywords: Devonian
Porto-Tomar-Ferreira do Alentejo Shear Zone
Issue Date: 2003
Publisher: Elsevier
Abstract: Abstract Middle/late Devonian and early Carboniferous metasedimentary sequences in the northernmost region (Porto-Espinho-Tomar) of the Ossa-Morena Zone (Portuguese Iberian Variscan Massif) contain black shales of very low to low-grade metamorphism. These metasedimentary rocks form a discrete NNW-SSE structure within a major shear zone (Porto-Tomar-Ferreira do Alentejo) and remain subparallel to the observed regional major structures (folding, thrusts or overthrusts). These black shales are overhanged and then imbricated in an upper Proterozoic metamorphic substratum. A multi-disciplinary study of these metasedimentary rocks from the Espinho-Tomar region has tectonostratigraphy, palynology, organic petrology and clay mineralogy combined methods. This approach provides new insights into the tectonic evolution and geological framework of Palaeozoic basement of the IberianVariscides. Palaeoenvironmental and tectonostratigraphic implications on the Iberian geodynamic framework are discussed. © 2003 Éditions scientifiques et médicales Elsevier SAS. All rights reserved.
Type: article
Appears in Collections:CGE - Publicações - Artigos em Revistas Internacionais Com Arbitragem Científica
GEO - Publicações - Artigos em Revistas Internacionais Com Arbitragem Científica

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