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New U-Pb ages for syn-orogenic magmatism in the SW sector of the Ossa Morena Zo...
Moita, P.; Santos, J. F.; Costa, M. M.; Corfu, F.The Ossa-Morena Zone (OMZ) is a major geotectonic unit within the Iberian Massif (which constitutes an important segment of the European Variscan Belt) and one of its distinguishing features is the presence of a noteworthy compositional diversity of plutonic rocks. In the SW sector of the OMZ, the tonalitic Hospitais intrusion (located to the W of Montemor-o-Novo) is considered a typical example of syn-orogenic...
Isótopos de estrôncio no estudo da proveniência do ligante em argamassas: cróni...
Cardoso, I.; Moita, P.; Santos, J. F.; Candeias, A.; Silva, A. S.; Mirão, J.A cidade Romana de Ammaia é um importante sítio arqueológico, localizado no distrito de Portalegre (Portugal), que se desenvolveu durante o Império Romano. Pensa-se que tenha sido abandonada de forma abrupta, apesar de algumas evidências de posterior apropriação durante a ocupação muçulmana. Este uso descontinuado provocou a não-ocupação da cidade em épocas mais recentes, o que terá contribuído para a preservaç...
New geochemical and isotopic constraints on the genesis of the Oliveira Azeméis...
Santos, J.; Mendes, M.H.; Gonçalves, A.; Moita, P.The Porto-Tomar Shear Zone (PTSZ) is a very important tectonic structure that separates, in central-western Portugal, two of the major tectonic units of the Iberian Variscan Chain: the Ossa-Morena Zone, to the west, and the Central Iberian Zone, to the east. The Oliveira de Azeméis area lies in the northern sector of the PTZC and it is characterized by the occurrence of strongly deformed granitoids. Country roc...
Sr and Nd isotope composition of the Alcáçovas calc-alkaline rocks (Ossa- Moren...
Santos, J.; Moita, P.; Marques, J.The Alcáçovas area is located in the SW sector of the Ossa- Morena Zone (OMZ), close to a major fault that separates this geotectonic unit from the South Portuguese Zone (SPZ). Along this boundary, in the OMZ, testimonies of low-K tholeiitic and calcalkaline magmatism are common and have been interpreted as being related to the operation of a subduction zone between OMZ and SPZ during the Variscan cycle [1]. Tw...
Multidisciplinary study of an enclave swarm in the Évora granitoid
Moita, P.; Silva, P.; Pedro, J.; Santos, J.F.The enclave swarm of Pomarinho is located in the SW edge of Évora granitoid [1], in the SW sector of the Ossa-Morena Zone (Iberian Variscides). The swarm, with a privileged 3D exposure, was sampled for geophysical, petrographic and geochemical studies in order to better understand the chemical and mechanical processes involved in the genesis of that structure. The enclaves have tonalitic and granodioritic compo...
Geologia de Portugal - Geologia Pré-Mesozóica de Portugal II.2.3. Maciço de Évora
Pereira, M.F.; Chichorro, M.; Moita, P.; Brandão, J.B; Santos, J.F.O Maciço de Évora (ME) representa uma área com cerca de 60 km2 (Fig. 1) que se estende entre Montemor-o-Novo e Évora (Carvalhosa, 1983), localizada nos domínios ocidentais da Zona de Ossa-Morena (ZOM, Quesada e Munhá, 1990; Pereira et al., 2007; 2008, 2009a) e incluído no sector de Montemor-Ficalho (Oliveira et al., 1991). Os seus limites foram definidos por Carvalhosa (1983) como coincidentes a sudoeste com o ...
Sr and Nd isotope composition of the Alcáçovas calc-alkaline rocks (Ossa-Morena...
Santos, J. F.; Moita, P.; Marques, J.The Alcáçovas area is located in the SW sector of the Ossa-Morena Zone (OMZ), close to a major fault that separates this geotectonic unit from the South Portuguese Zone (SPZ). Along this boundary, in the OMZ, testimonies of low-K tholeiitic and calc-alkaline magmatism are common and have been interpreted as being related to the operation of a subduction zone between OMZ and SPZ during the Variscan cycle [1]. Tw...
Enxame de encraves do Pomarinho (granitóide de Évora): um estudo preliminar
Moita, P.; Silva, P.; Santos, J. F.; Pardal, E.No bordo SW do granitóide de Évora (junto a Pomarinho), encontra-se um enxame de encraves ígneos, máficos a intermédios. Dados de ASM, obtidos nos encraves e na rocha hospedeira, revelam uma forte coerência nas lineações magnéticas (K1), com direcção N-S e inclinação de 35º para S. Estes resultados permitem sugerir que a disposição das lineações tivesse sido controlada por factores como: i) reajustamento tectón...
Multidisciplinary study of an enclave swarm in the Évora granitoid
Moita, P.; Silva, P.; Pedro, J.; Santos, J. F.The enclave swarm of Pomarinho is located in the SW edge of Évora granitoid, in the SW sector of the Ossa-Morena Zone (Iberian Variscides). The swarm, with a privileged 3D exposure, was sampled for geophysical, petrographic and geochemical studies in order to better understand the chemical and mechanical processes involved in the genesis of that structure. The enclaves have tonalitic and granodioritic compositi...
Mineralogical composition of ceramics from Garvao iron age votive deposit (Port...
Rosado, L.; Candeias, A.; Moita, P.; Tavares, D.; Mayet, D.; Lopes, M.C.; Alfenim, R.; Mirão, J.In 1982, a votive deposit was discovered in Garvão (SW Portugal) revealing an important Iron Age II holy site. The pottery recovered shows that during Iron Age this archeological site was a merging geostrategic point of the Iberian societies with strong influences of the Mediterranean world and the Iberia celtic influences. Raw materials used by these communities provide essential information to understand spec...
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