José Romão

José Romão
Laboratório Nacional de Energia e Geologia | LNEG · Unidade de Geologia e Cartografia Geológica

PhD

About

59
Publications
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687
Citations
Citations since 2017
14 Research Items
338 Citations
2017201820192020202120222023020406080
2017201820192020202120222023020406080
2017201820192020202120222023020406080
2017201820192020202120222023020406080

Publications

Publications (59)
Article
Full-text available
The occurrence of a new tectono-stratigraphic terrane (Finisterra Terrane), located in the westernmost domains of the Porto-Tomar-Ferreira do Alentejo Shear Zone, has been highlighted in the last few years. Nevertheless, there are several gaps in the geological knowledge of this Terrane, including the interpretation of existing data in the framewor...
Article
Full-text available
The Iberian Massif was divided into several tectono-stratigraphic terranes with its own features, among them the Finisterra Terrane. This Terrane connects with the Iberian one, namely with the Central Iberian and Ossa-Morena Zones, through a lithospheric shear zone, the Porto-Tomar-Ferreira do Alentejo Shear Zone. Several Finisterra Terrane feature...
Article
Full-text available
A geologia é a ciência que estuda a terra; que descreve e interpreta a composição, a estrutura e a dinâmica atual do nosso planeta. Por isso, o conhe ci-mento geológico é um fator fundamental para o desen-vol vimento económico, social e cultural dos povos. no século XXi a geologia e os geocientistas ofere cem uma contribuição indispensável para os...
Chapter
This chapter characterizes the Finisterra Terrane, enhancing its differences from the neighbouring Iberian Terrane. The contact between these terranes is the Porto-Tomar-Ferreira do Alentejo Shear Zone, a major lithospheric structure whose complex Variscan evolution remains debatable. The lithostratigraphic, tectonometamorphic and magmatic features...
Conference Paper
Full-text available
A ocorrência de um terreno tectono-estratigráfico localizado a Oeste da Zona de Cisalhamento Porto-Tomar-Ferreira do Alentejo tem sido posto em evidência ao longo dos últimos anos. Apesar dos trabalhos realizados no denominado Terreno Finisterra, várias são as lacunas no conhecimento geológico deste Terreno, bem como na interpretação dos dados exis...
Conference Paper
Full-text available
The definition of the Neoproterozoic lithostratigraphic successions of the Ossa-Morena Zone is crucial for understanding the geodynamic evolution and paleogeographic reconstruction of the northern margin of Gondwana. Recent work in the Abrantes region identified three distinct lithostratigraphic units, attributed to the Neoproterozoic. Two of these...
Conference Paper
Full-text available
O Terreno Finisterra (TF) está descrito como um terreno exótico com características paleogeográficas distintas das unidades peri-Gondwanicos típicas do Maciço Ibérico (MI). Diferentes interpretações tectónicas e estruturais das estruturas de primeira ordem, como a Zona de Cisalhamento Porto-Tomar-Ferreira do Alentejo, promovem visões distintas da e...
Article
Four distinct Palaeozoic episodes of marine carbonate sedimentation are reported in the Ossa-Morena Zone (SW Iberian Variscides). Among them, the Cambrian and the Devonian episodes are those that are well represented in the Portuguese domains of the Ossa-Morena zone. In this zone, the strong Variscan deformation and metamorphic recrystallization ob...
Article
Full-text available
As características geológicas da Região Demarcada do Douro, nos seus diversos aspetos (e.g. geomorfologia, litologia, solos, hidrogeologia), condiciona o desenvolvimento dos seus vinhedos e, consequentemente, a sua produção vitivinícola, em termos de quantidade e qualidade. De facto, a geologia, a geomorfologia e o clima, encontram-se intimamente a...
Conference Paper
Full-text available
The Iberian Massif was divided into several tectono-stratigraphic terranes with its own features, among them the Finisterra Terrane. This Terrane connects with the Iberian one, namely with the Central Iberian and Ossa-Morena Zones, through a lithospheric shear zone, the Porto-Tomar-Ferreira do Alentejo Shear Zone. Several features of the Finisterra...
Conference Paper
Full-text available
A Carta Geológica de Tomar publicada em 2017, pelo Laboratório Nacional de Energia e Geologia (LNEG), na escala 1:50 000, é o resultado da integração de numerosos dados de diferentes componentes de investigação. Constitui pelo seu posicionamento geológico uma área-chave na compreensão da evolução tectono-estratigráfica e paleogeográfica dos ciclos...
Conference Paper
Full-text available
The 87 Sr/ 86 Sr ratio is usually used in stratigraphy to correlate and even date marine carbonate sedimentation events. The variation of the 87 Sr/ 86 Sr isotopic ratio along the geological time scale combined with the fact of this isotopic ratio could be considered uniform in all ocean at a given geological moment, opens a thematic for the invest...
Conference Paper
Full-text available
The Finisterra Terrane is located in the western sector of the Iberian Variscides and its eastern boundary is a N-S to NNW-SSE lithospheric structure, the Porto-Tomar-Ferreira do Alentejo Shear Zone (PTFSZ). The PTFSZ makes the contact between the Finisterra Terrane and two distinct paleogeographic zones of the Iberian Terrane: Central Iberian and...
Conference Paper
Full-text available
The Porto-Tomar-Ferreira do Alentejo Shear Zone is a first order structure on European Variscan Orogen. However, its significance, origin and time activity is a thematic in discussion. New data in the Abrantes-Tomar sector show the presence of N-S elongated units, with own tectonostratigraphic features and which differ from Central Iberian and Ossa...
Conference Paper
Full-text available
The carbonate sedimentation in Ossa-Morena Zone during the Palaeozoic is formed, at least, during two main episodes. However, some chronological questions remain open, due to lack of biostratigraphic data in some carbonates. Sr isotope analysis were performed on selected limestones and marbles from Ossa-Morena Zone, in order to discriminate the Sr...
Research
Full-text available
Abstract: A complete transition in tectonic style between pure thrust belts and pure strike-slip belts can be envisaged, both in interplate and intraplate settings, by a combination of thrust and strike-slip components of displacement. The accommodation of shortening components in strike-slip deformation belts has been discussed recently on the bas...
Research
Full-text available
Abstract: The Rosmaninhal area (Beira Baixa, Central Portugal) was mapped in detail. The lithostratigraphy of the Beiras Group (part of the “Xisto-Grauváquico” Complex - CXG, Cambrian to upper Proterozoic in age) was established and allowed the mapping of folds and thrusts of Sardic age (Cambrian to Ordovician), on which are superposed variscan fol...
Conference Paper
Full-text available
One of the main features of the Central-Iberian Zone is the relation between the lower Ordovician and the Cambrian or Upper Proterozoic rocks (the "Sardic deformation"; Lotze, 1956) which is marked by two unconformities: the upper Iberian one between the Armorican Quartzite Formation and underlying early Ordovician units and the Toledanian unconfor...
Article
Full-text available
Resumo Evidências significativas de mineração de ouro aluvionar, associadas com a sua exploração nos tempos romanos e, também, provavelmente na Proto-História, ocorrem, na sua maioria, dispersas no território do Concelho de Vila de Rei, bem como nos de Abrantes e Mação. Este património geológico, mineiro e arqueológico não renovável, de apreciável...
Article
Full-text available
A cartografia geológica da região Tomar-Sardoal-Ferreira do Zêzere permitiu individualizar sucessões tectono-estratigráficas em dominíos da Zona Centro-Ibérica (ZCI) e da Zona Ossa Morena (ZOM) que anteriormente eram considerados apenas como ZOM, separadas entre si pelo carreamento de Ortiga-Torrão. A sucessão centro-ibérica monometamórfica, datada...
Article
Full-text available
No Varisco da Ibéria têm sido identificadas diversas macroestruturas arqueadas cuja caracterização e génese é objecto de controvérsia. Neste trabalho discutem-se os argumentos associados a cada uma destas estruturas, bem como os processos de formação dos arcos Ibero-Armoricano e Cantábrico. Os elementos existentes sugerem uma génese polifásica, ond...
Conference Paper
Full-text available
In the Iberian Variscides it's possible to emphasize major arcuate structures; although highly studied their characterization and genesis is still a matter of controversy. The main Ibero-Armorican Arc (IAA) is essentially defined by a NW-SE trend in the Iberian branch and an E-W trend in the Brittany one; however, in northern Spain it presents a 1...
Article
Full-text available
Throughout the Central-Iberian Zone (CIZ) the transition between the sequences of Cambrian age, and the overlying sequences of Ordovician age always show evidence of the Sardic phase s.l. However the effects of this pre-Armorican Quartzites deformation are highly heterogeneous; in most of the cases it is only shown by a significant erosive level gi...
Article
Full-text available
Geological mapping of the Tomar-Sardoal-Ferreira do Zêzere region allowed the split-up of tectono-stratigraphic successions belonging to the Central-Iberian (CIZ) and Ossa Morena (OMZ) Zones, previously considered all together as OMZ, separated by the Ortiga-Torrão thrust. The CIZ monometamorphic succession, dated from the Neoproterozoic to the Sil...
Article
Full-text available
The geodynamic evolution of Iberia since Neoproterozoic times illustrates the progression of the two last supercontinent cycles and the probable path to the next one. The Pangaea supercontinent cycle shows features of Hercynian- and Alpine-type orogens both in terms of tectonothermal regime and geometry/kinematics. The combination of inherited and...
Conference Paper
Full-text available
A cartografia geológica do Terreno Finisterra, no sector localizado a E de Tomar, permitiu individualizar uma sucessão tectono-estratigráfica de idade neoproterozóica, que é constituída da base para o topo por: Complexo Gnaisso-Migmatítico de S. Pedro de Tomar, Metagrauvaques e Micaxistos de Junqueira e Ortognaisses de Couço dos Pinheiros. É uma su...
Conference Paper
Full-text available
As zonas de cisalhamento WNW-ESSE de Tomar -Badajoz -Córdova (zcTBC) e NNE-SSE de Porto – Tomar – Ferreira do Alentejo (zcTBC) são estruturas de primeira ordem do orógeno Varisco, cuja caracterização é fundamental para a compreensão da sua evolução geodinâmica. Neste contexto a região de Abrantes é um sector chave visto corresponder à zona de inter...
Article
Full-text available
Resumo: A cartografia geológica é uma infraestrutura básica e precisa, que sintetiza todo o conhecimento geológico de uma região. Utiliza o método cartográfico de forma intensiva e é, hoje em dia, indispensável a sua interacção com novas tecnologias, nomeadamente imagens de satélite (ópticas e radar) e Sistemas de Informação Geográfica. Constitui u...
Conference Paper
Full-text available
The Tomar-Badajoz-Cordoba shear zone (TBCSZ) and the Porto-Tomar-Ferreira do Alentejo shear zones (PTFASZ) are two of the major variscan structures in the Iberian Massif. Their characterization is thus crucial to understand the geodynamic evolution of the Iberian Variscan Chain. These two major shear zones intersect in the Abrantes region (Ribeiro...
Article
The studied area is located in the Abrantes (W-central Portugal) region of the Ossa Morena Zone, where the NW tip of the Tomar-Badajoz-Cordoba Shear Zone (TBCSZ) stops against the Porto-Tomar-Ferreira do Alentejo Shear Zone (PTFASZ). The TBCSZ is a WNW-ESE sinistral transpressive intra-plate Variscan flower structure, whereas the PTFASZ is N-S dext...
Article
The Serra do Moradal-Fajão syncline is a major NNW-SSE Variscan structure developed in the SW sector of the Centro-Iberian Zone, one of the main geodynamical structures of the Iberian Variscides. This tight syncline with a 1.5 km wavelength, could be followed for more than 80 km and represents one of the most important regional structures. Its comp...
Conference Paper
In the Abrantes area of the Ossa Morena Zone the NW tip of the Tomar-Badajoz-Cordoba Shear Zone (TBCSZ) stops against the Porto-Tomar-Ferreira do Alentejo Shear Zone (PTFASZ). Basement nappes of Cadomian age were thrust to the NE during the Variscan orogeny. Low intermediate pressure granulites contrast with high pressure eclogite Cadomian assembla...
Article
Remnants of the Cadomian basement can be found in the Iberian Variscides (IBVA) in several key sectors of its autochthonous units (composed of Neoproterozoic to Lower Palaeozoic metasedimentary sequences) and within the Continental Allochthonous Terrane (CAT). Comprehensive characterization of these critical exposures shows that the prevailing feat...
Article
The revision of the geological mapping (scale 1:25 000) of the Vila Velha de Ródão syncline revealed a succession whose data ranged from the early Ordovician to the lower Silurian, similarly to the D3 Amêndoa-Carvoeiro sinform and new elements about the Variscan deformation. Early overthrusts, reactivated forethrusts with duplex geometry with NE fa...
Article
Full-text available
New data about the lithostratigraphy and the progressive Variscan structure of the Vila Velha de Ródão complex syncline is presented. During the geological mapping revision was established an Ordovician-Silurian succession, very similar to the Amêndoa-Carvoeiro synform D 3 (Romão, 2000). The Variscan deformation includes: early overthrusts subseque...
Article
The revision of the geological mapping (scale 1:25 000) of the Vila Velha de Ródão syncline revealed a succession whose data ranged from the early Ordovician to the lower Silurian, similarly to the D3 Amêndoa-Carvoeiro sinform and new elements about the Variscan deformation. Early overthrusts, reactivated forethrusts with duplex geometry with NE fa...
Article
Full-text available
A revision of benthic faunas and palynomorphs previously described from the Dornes syncline, southern Central Iberian Zone, Portugal, complemented with recent research, shows that the Serra de Luação Formation is of Lochkovian age. The systematics of the benthic faunas, with clear Gondwana affinities, are described in detail.
Article
Full-text available
1] 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...
Article
Full-text available
The Variscides of Iberia have a bilateral symmetry with east vergence in the eastern branch and west vergence in the western, on both sides of a Centro-Iberian Zone (CIZ), with predominant steep axial planes. All the structures curve around the Ibero-Armorican Arc (IAA). Unconformities in the sedimentary sequences of Cambrian to Early Ordovician ag...
Conference Paper
Full-text available
The sedimentary sequences of the Cambrian to Ordovician age contains unconformities that were designated as "Sardic phase" by correlation with similar tectono-sedimentary events in Sardinia. Recent studies showed diachronism between these events in Sardinia and Iberia; however, the migration of a major geodynamic regime that changes in time might b...
Conference Paper
Abstract: Data produced by the quantitative study of detrital modes and major elements geochemistry of the metagraywackes of the Rosmaninhal Formation and Padrão-Silveira unit, that crop out at the upper of the Beiras Group; SW border of the Central-Iberian Zone suggest that the source of these sediments was an eroded orogenic continental margin, p...

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