145 documents found, page 1 of 15
Thermoelectric Properties of Tetrahedrites Produced from Mixtures of Natural an...
Santos, Beatriz; Esperto, Luís; Figueira Vasques, Isabel; Mascarenhas, João; Lopes, E.B.; Salgueiro, Rute; Silva, Teresa; Correia, Jose B.ABSTRACT: Thermoelectric materials have considerable potential in the mitigation of the global energy crisis, through their ability to convert heat into electricity. This study aims to valorize natural resources, and potentially reduce production costs, by incorporating tetrahedrite-tennantite (td) ores from the Portuguese Iberian Pyrite Belt into synthetic samples. The ore samples were collected in a mine wast...
High strain peralkaline orthogneisses within orogenic scale shear zones: geolog...
Roseiro, José; Moreira, Noel; Nogueira, Pedro; de Oliveira, Daniel Pipa SoaresABSTRACT: The lithological units in the Arronches region (included within the Arronches tectonic unit, Tomar-Badajoz-Córdoba Shear Zone, northernmost Ossa-Morena Zone) and in particular the peralkaline orthogneisses therein, have been the target for petrological, geochemical and structural studies in order to constrain its petrogenesis and tectono-metamorphic contextualization within the broader regional geolog...
Áreas potenciais de Portugal para recursos minerais do domínio público
Carvalho, Jorge; Filipe, Augusto; Lisboa, Jose; Xavier Matos, João Manuel; Batista, Maria Joao; Salgueiro, Rute; de Oliveira, Daniel Pipa SoaresRESUMO: O ordenamento do território é decisivo no processo de garantir o acesso aos recursos minerais. Durante os trabalhos para identificar as ações necessárias para a preparação da Estratégia Nacional para os Recursos Geológicos foi produzido um mapa de áreas potenciais em recursos minerais de Portugal. Constitui um ponto de partida para a implementação de uma metodologia vocacionada para a delimitação de áre...
The Iberian industries of natural stone and industrial minerals
Alonso-Jiménez, Antonio; Regueiro y González-Barros, Manuel; Álvarez Areces, Enrique; de Oliveira, Daniel Pipa SoaresABSTRACT: After more than two millennia of mining history, Spain and Portugal together produce approximately one billion tons of rocks and industrial minerals each year. In Spain and Portugal, the industry of ornamental rocks and industrial minerals has developed significantly in recent years. The demand for construction and ornamental materials has increased, and both countries have emerged as world leaders in...
Ranked Mappable Criteria for Magmatic Units: Systematization of the Ossa-Morena...
Roseiro, José; Moreira, Noel; de Oliveira, Daniel Pipa Soares; Silva, Marcelo; Eguiluz, Luis; Nogueira, PedroABSTRACT: The Ossa-Morena Zone (SW Iberian Massif) hosts the largest set of Cambro-Ordovician alkaline magmatic plutons related to the Palaeozoic rifting of the northern Gondwana margin so far described. An organized framework for their classification at different scales is proposed through data-driven ranks based on their distinctive petrological features relative to other rift-related magmatic rocks found thr...
The Geological Survey Organisations in delivering Critical Raw Materials autono...
Hollis, Julie; Albert, Capucine; Bertrand, Guillaume; Cabidoche, Marina; de Oliveira, Daniel Pipa Soares; Dobnikar, Meta; Teran, KlemenABSTRACT: Europe’s dependence on foreign-sourced critical raw materials poses a significant threat to its strategic autonomy and competitiveness. In this paper, we examine the historical significance of mining in Europe, the current geopolitical complexities surrounding critical raw materials supply, and recent EU policy initiatives aimed at bolstering domestic critical raw materials production and processing a...
Chemical and Mineralogical Characterization ofWaste from Abandoned Copper and M...
de Oliveira, Daniel Pipa Soares; Silva, Teresa; Morais, Igor; Fernandes, JoãoABSTRACT: This study examines the chemical and mineralogical composition of waste materials from abandoned copper and manganese mines in the Iberian Pyrite Belt, Portugal, as a first step toward their potential recycling for critical and strategic raw materials (CRM and SRM). Using portable X-ray fluorescence (pXRF) and other analytical techniques, this research highlights the presence of valuable elements, inc...
Arquivo de lâminas e superfícies polidas do LNEG, uma coleção de valor científi...
Pereira, Zélia; Quental, Lídia; Jorge, Micael; Teixeira, Rui; Patinha, Pedro; Xavier Matos, João Manuel; Mesquita Soares, SofiaRESUMO: O arquivo histórico do Laboratório Nacional de Energia e Geologia (LNEG) engloba um espólio científico resultante de quase 180 anos de atividade geológica e mineira, o que constitui um banco de dados excecional e um verdadeiro repositório geológico nacional. No âmbito das áreas de missão do LNEG, consta a preservação, tratamento e disponibilização deste património único. Este espólio é considerado patri...
Como o trabalho do LNEG apoia a concretização do PNEC: Plano Nacional de Energi...
Simoes, Sofia; Simões, Teresa; Barbosa, Juliana Pacheco; Rodrigues, Carlos; Azevedo, Pedro; Cardoso, João; Facão, Jorge; Costa, Paula Silva
Mapping Critical Raw Materials (CRM) hard rock deposits in Europe
Albert, Capucine; Bertrand, Guillaume; Berthier, Hervé; de Oliveira, Daniel Pipa Soares; Tulstrup, JørgenABSTRACT: This article presents the new version of the map of critical raw materials hard rock deposits that has been produced in the frame of the GSEU project (Geological Service for Europe). The map displays over 800 medium to very large deposits for 30 Critical Raw Materials (CRM) from the 2023 list of the European Commission, in 33 European countries. We explain the objective of this work and the process an...