43 documents found, page 1 of 5
New Contributions to Mineralogical and Geochemical Knowledge of Old Preguiça Mi...
Silva, Teresa; Morais, Igor; Mesquita Soares, Sofia; Rodrigues, Ivo; de Oliveira, Daniel Pipa Soares; Mirao, JoseABSTRACT: Abandoned mining areas provide valuable opportunities to investigate ore-forming processes, supergene mineral transformations, and the geochemical behaviour of metals. In this sense, the old Preguiça mine (Beja, Portugal), exploited for Fe–Zn–Pb, was studied providing new mineralogical and geochemical data aimed at improving the understanding of the secondary mineral assemblages of this deposit. A tot...
Calcretos da região de Elvas : Estudo preliminar
Mesquita Soares, Sofia; Dias, Ruben; Ressurreição, Ricardo; Morais, Igor; Albardeiro, Luís; Gonçalves, Pedro; Solá, A. Rita; Castro-Pina, M.RESUMO: A construção de uma via-férrea no Nordeste Alentejano atravessando a Zona de Ossa-Morena permitiu estudos detalhados focados nas unidades geológicas e na estrutura da área. Na região de Elvas, o Miocénico é representado por um conglomerado coberto por lutitos, mais grosseiro perto da falha de Messejana, onde apresenta basculamento tectónico. Os sedimentos e as rochas do substrato estão fortemente afetad...
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...
Use of mining wastes for high-tech thermoelectric applications : The case of ST...
Morais, Igor; de Oliveira, Daniel Pipa Soares; Silva, Teresa; Albardeiro, Luís; Salgueiro, Rute; Neves, FilipeABSTRACT: Europe aims to become the first climate neutral continent by 2050, which means rapidly implementing a green transition to which the European Union (EU) is strongly committed through the European Green Deal. This green transition leverages unprecedented pressure on the intensive use of mineral resources. In this context the START project “Sustainable Energy Harvesting Systems Based on Innovative Mine W...
Estudos Geofísicos na Perspetiva de Otimização do Local de uma Captação Geotérm...
Ferreira Gomes, L. M.; Ramalho, Elsa; Carvalho, João; Sampaio, José; Francés, Alain Pascal; Represas, Patricia; Marques, Fábio; Morais, IgorRESUMO: As alterações climáticas têm gerado impactos significativos nos territórios termais, tanto de forma direta, por diminuição, desde logo, da recarga dos sistemas aquíferos, e indiretamente através da intensificação da procura de recursos hídricos subterrâneos e da transformação dos usos do solo, fatores que, em conjunto, podem comprometer a qualidade e a disponibilidade dos recursos hidrominerais e geotér...
Geophysical characterization of the Cercal Paleozoic structure, Iberian Pyrite ...
Feitoza, L. M.; Carvalho, João; Represas, Patricia; Ramalho, Elsa; Sousa, Pedro; Matos, João Xavier; Albardeiro, Luís; Morais, IgorABSTRACT: The Cercal Volcano-Sedimentary Complex (Cercal VSC) structure is the westernmost sector of the Iberian Pyrite Belt (IPB) giant metallogenic province and was explored since Roman times for volcanogenic massive sulphides (VMS) and Fe–Mn (Ba) deposits. However, presently only a single deposit is known, the Salgadinho Cu-Ag-Au stockwork/disseminated deposit. Nevertheless, according to several mining compa...
Unlocking the Secondary Critical Raw Material Potential of Historical Mine Site...
de Oliveira, Daniel Pipa Soares; Gonçalves, Pedro; Morais, Igor; Silva, Teresa; Matos, João Xavier; Albardeiro, Luís; Filipe, AugustoABSTRACT: A steady supply of mineral raw materials is vital for the transition to a low-carbon, circular economy. The number of active mines in Europe has severely declined over the last century and half, giving rise to many abandoned mining waste sites and corresponding geological heritage. Also, the rise in minerals demand for large-scale deployment of renewable energy requires the continued and steady availa...
Geophysical characterization of the Cercal Paleozoic structure, Iberian Pyrite ...
Feitoza, L. M.; Carvalho, João; Represas, Patricia; Ramalho, Elsa; Sousa, Pedro; Matos, João Xavier; Albardeiro, Luís; Morais, IgorABSTRACT: The Cercal Volcano-Sedimentary Complex (Cercal VSC) structure is the westernmost sector of the Iberian Pyrite Belt (IPB) giant metallogenic province and was explored since Roman times for volcanogenic massive sulphides (VMS) and Fe–Mn (Ba) deposits. However, presently only a single deposit is known, the Salgadinho Cu-Ag-Au stockwork/disseminated deposit. Nevertheless, according to several mining compa...
Late Famennian (latest Strunian) palynomorph assemblages and their role in the ...
Mendes, Márcia; Pereira, Zélia; Matos, João Xavier; Albardeiro, Luis; Morais, Igor; Araújo, VitorABSTRACT: This research examines palynomorph assemblages preserved in sediments of the Iberian Pyrite Belt (IPB) that host the Neves-Corvo massive sulfide deposit and its importance for mineral exploration. The sediments belong to the Neves Formation, characterized by black shales and minor occurrences of siltstones and cherts, indicative of reduced environmental conditions, favorable to sulfide deposition in a...
Um novo método de prospeção geoquímica para a identificação de depósitos profun...
Morais, Igor; Rosado, L.; Albardeiro, Luís; Mirao, Jose; Batista, Maria Joao; Matos, João XavierSUMMARY: The fast energetic transition in the world needs large amounts of mineral resources that are currently scarce. For the suppression of these needs, new mineral deposits must be found, demanding the development of new exploration techniques. Currently, in several metalogenetic provinces, surface deposits are rare. In the Iberian Pyrite Belt, geophysical techniques, namely gravimetry and electromagnetics,...