LIVRO GUIA DA SAÍDA DE CAMPO Á REGIÃO DE MONSARAZ-BARRANCOS

Nesta publicação descrevem-se nove paragens de uma saída de campo realizada na Zona de Ossa-Morena, Sector de Estremoz-Barrancos

LABORATÓRIO DE CIÊNCIAS E TECNOLOGIAS DA TERRA ATMOSFERA E ENERGIA: UMA CANDIDATURA AO SISTEMA DE APOIO A INFRAESTRUTURAS CIENTÍFICAS E TECNOLÓGICAS (QREN)

Descreve-se a preparação e a concretização de uma candidatura institucional da Universidade de Évora com vista à criação de uma infraestrutura cientifico-tecnológica dedicada às Ciências da Terra, Atmosfera e Energia

A importância da cartografia geológica para o desenvolvimento de um Território

Neste trabalho apresenta-se uma síntese histórica da evolução da Cartografia Geológica a nível mundial e da evolução do conhecimento geológico no território de Timor-Leste. Salienta-se a importância da Cartografia Geológica como ferramenta para o planeamento territorial e propõe-se uma estratégia para o desenvolvimento do território de Timor-Leste

OFIOLITOS E METAMORFISMO DE ALTA PRESSÃO

Artigo de síntese sobre o limite entre as Zonas de Ossa-Morena e Sul Portuguesa e sobre a sua interpretação como uma zona de sutura varisca

Relicts of Rheic Ocean in Southwest Iberia (Ossa-Morena Zone - Portugal)

The geodynamic evolution of Iberian Peninsula during the Variscan Orogeny is directly related with the Wilson Cycle of Rheic Ocean (Vera, 2004; Dias et al., 2006; Ribeiro et al., 2007). This relationship is underlined by major sutures zones and by several occurrences of high pressure metamorphic rocks (i. e. eclogites and blueschits) and ophiolites terranes (scattered slices) in the Iberian Terrane. The Ossa-Morena Zone (OMZ), the southernmost unit of the Iberian Autochthon Terrane in SW Iberia (Fig. 1), is bounded by two major tectonic lines: the Northern boundary which corresponds to the Tomar-Badajoz-Cordoba Shear Zone (TBCSZ), a Cadomian suture reworked in transpression during the Variscan Orogeny, and the Southern boundary, which corresponds to the South Iberian Variscan Suture Zone (Ribeiro et al., 2007). In the OMZ the Proterozoic basement is separate from the lower Cambrian rocks (felsic volcanics and conglomerates) by a major unconformity that corresponds to the beginning of the Variscan Cycle. The rifting stage is marked by the deposition of lower Cambrian limestones and by bimodal extensional magmatism (Mata & Munhá, 1990). The lower Palaeozoic sequence of OMZ shows strong variations of facies, corresponding to the existence of several local sedimentary basins. This feature is related with a near continuous extensional tectonics regime (Rheic opening), until Silurian times. The Silurian sequence denotes a deep sedimentary environment. At this time, Rheic becomes a wide ocean and the passive margin evolution during lower Palaeozoic is confirmed by the sedimentary record and magmatism chemistry (Mata & Munhá, 1990, Ribeiro et al, 1992; 1997). During lower Devonian the sedimentary record show the existence of tectonic instabilities probably related with the beginning of the Rheic oblique closure. This assumption is supported by the existence of (1) local flysch deposits with lower Devonian age, (2) the occurrence of reworked slices of Silurian rocks within lower Devonian formations and (3) the presence of a Tectonic Accretionary Complex which truncates the autochthonous sequence of OMZ, ranging from Precambrian to upper Silurian/Lower Devonian (Araújo et al, 2005; 2006). During middle to upper Devonian occurs the main tectono-metamorphic event related with the Rheic closure in the southern border of OMZ (Quesada et al., 1994; Fonseca et al., 1999): a subduction/obduction process, with northwards polarity, is responsible by the generation of a flake like geometry and by the occurrence of the Tectonic Accretionary Complex, related with the obduction in the Southern Iberia Variscan Suture, which includes slices of (1) autochthonous rocks, (2) ophiolites and (3) high-pressure rocks (blueschists and eclogites). Also related with the subduction/obduction process occurs the emplacement of the Paired Ophiolite Belt. This ophiolite belt is formed by the Beja-Acebuches Ophiolite Complex (BAOC), an external ophiolite that mark the South Iberian Variscan Suture Zone, and by the Internal Ophiolite Sequence (IOS) (Fonseca, 1995; Pedro, 2004; Ribeiro, 2006; Ribeiro et al., 2007) Also in Devonian times the orogenic magmatism starts with the emplacement of the first rocks of Beja Massif and goes on until upper Carboniferous with the emplacement of widespread intrusive rocks

The Neoproterozoic-Cambrian transition in Abrantes Region (Central Portugal); Litostratigraphic correlation with the Cambrian Series of Ossa-Morena Zone

Abrantes region presents a litostratigraphic succession with clear similarities with typical sequences of Neoproterozoic-Cambrian transition in Ossa-Morena Zone (OMZ). Classical works have attributed Abrantes entire sequence to Neoproterozoic (e.g. Gonçalves et al., 1979). Detailed characterization, based on fieldwork, of the stratigraphic succession allows to discriminate the presence of litostratigraphic units, attributed to lower Cambrian by correlation with other localities of the OMZ; these units overly Neoproterozoic series. The Cambrian sequence begins with a volcano-sedimentary unit composed by detrital rocks, which includes meta-arkoses, meta-pelites and meta-psamites; some rocks show immature content. The volcanic component is mostly composed by abundant felsic rocks, generally with rhyodacitic composition (Abrantes Felsic Unit). The previous characteristics are common in OMZ, where a clastic unit (often missing), sometimes with felsic volcanics and conglomerates, overlies the Serie Negra succession, previously deformed during the Cadomian orogeny at N1; Nance et al., 2012). Abrantes felsic unit gradually change to a carbonate unit (S. Miguel do Rio Torto Carbonates), with calcitic and dolomitic marbles and interbeded mafic volcanics. This unit can be correlated with a range of carbonated units present in all OMZ (Fig. 1C). These units represent a carbonate platform during lower Cambrian showing the beginning of an oceanization process that culminates with the opening of Rheic in lower Ordovician times (Pedro et al., 2010). The lower Cambrian succession culminates with another volcano-sedimentary complex, poorly outcropping; the clastic succession of this complex is dominated by pelitic rocks, interbedded with bimodal volcanics. The transition between the carbonated sedimentation and the overlying volcano-sedimentary one is gradual. All the previous units have not fossiliferous content, mainly due to the action of metamorphic process, which reaches the amphibolitic facies

AS REGIÕES CENTRAL E SUL DA ZONA DE OSSA-MORENA

Síntese da estrutura, magmatismo e evolução tectono-estratigráfica da Zona de Ossa-Morena

Assessment of the Environmental Risk of a Floodplain Contaminated by Metals Based on Different Indices and Environmental Classification Factors, Minas Gerais, Brazil

The geochemical characterization, of an industrial area in Minas Gerais State, Brazil, revealed presence of high levels of potentially toxic metals, higher than the values admitted. The use of three environmental classification indices enabled the comparison of data with the adopted classifications for each index, having identified cadmium, lead and zinc as the main contaminants. The construction of interpolation maps allowed the visualization of the e contaminants evolution throughout the area. It was possible to identify places where natural mitigation processes can be used end produce a comprehensive remediation proposal in places identified as requiring a more complex intervention

Using artificial intelligence for pattern recognition in a sports context

Optimizing athlete’s performance is one of the most important and challenging aspects of coaching. Physiological and positional data, often acquired using wearable devices, have been useful to identify patterns, thus leading to a better understanding of the game and, consequently, providing the opportunity to improve the athletic performance. Even though there is a panoply of research in pattern recognition, there is a gap when it comes to non-controlled environments, as during sports training and competition. This research paper combines the use of physiological and positional data as sequential features of different artificial intelligence approaches for action recognition in a real match context, adopting futsal as its case study. The traditional artificial neural networks (ANN) is compared with a deep learning method, Long Short-Term Memory Network, and also with the Dynamic Bayesian Mixture Model, which is an ensemble classification method. The methods were used to process all data sequences, which allowed to determine, based on the balance between precision and recall, that Dynamic Bayesian Mixture Model presents a superior performance, with an F1 score of 80.54% against the 33.31% achieved by the Long Short-Term Memory Network and 14.74% achieved by ANN.info:eu-repo/semantics/publishedVersio

Geomorphological sites in the northern domains of the Ossa Morena zone in Portugal: characterize aiming the promotion

This work characterizes eight geomorphological sites of the northern domains of the Ossa Morena Zone, aiming to expose their scientific, educational, scenic and touristic value, as well as to support the enhancement of the territory and its geoconservation. Six panoramic sites allow to approach and interpret the features of the Estremoz and Évora plateaus and the landforms that stand out from them, due to the joint action between lithology and climate, but also tectonics. One site illustrates a case of antecedent drainage and the last one highlight the tectonic constraints of the Guadiana River and its geomorphological evolution