15 documents found, page 1 of 2
Pb-Nd-Sr Isotope Geochemistry of Metapelites from the Iberian Pyrite Belt and I...
Luz, Filipa; A., Mateus; Ferreira, Ezequiel; Tassinari, Colombo G.; Figueiras, JorgeThe Iberian Pyrite Belt is a world-class metallogenic district developed at the Devonian-Carboniferous boundary in the Iberian Variscides that currently has seven active mines: Neves Corvo (Cu-Zn-Sn) and Aljustrel (Cu-Zn) in Portugal, and Riotinto (Cu), Las Cruces (Cu), Aguas Teñidas (Cu-Zn-Pb), Sotiel-Coronada (Cu-Zn-Pb), and La Magdalena (Cu-Zn-Pb) in Spain. The Iberian Pyrite Belt massive sulfide ores are us...
Current and Foreseen Tungsten Production in Portugal, and the Need of Safeguard...
A., Mateus; Lopes, Catarina; Martins, Luís; GonçalvesThe economic and strategic importance of tungsten is widely recognized, but several concerns exist on its stable future supply. Portugal is one of the main tungsten producers in Europe, having generated ≈121 kt of contained tungsten in mineral concentrates from 1910 to 2020, i.e., ≈3.3% of the global production documented for the same time period. Since the early nineties, tungsten mining in Portugal is confine...
Relative Abundance and Compositional Variation of Silicates, Oxides and Phospha...
A., Mateus; Figueiras, Jorge; Martins, Ivo; Rodrigues, Pedro; Pinto, FilipePanasqueira is a world-class W-Sn-Cu lode-type deposit located in Portugal. It consists of a dense swarm of subhorizontal quartz lodes criss-crossed by several ENE–WSW and N–S fault zones, bordering Late Variscan granite and hosted in Late Ediacaran—Early Cambrian metasediments. The relative abundance and compositional variation (assessed with EPMA) of the main silicates, oxides and phosphates forming the quart...
Recursos naturais de lítio
A., MateusA necessidade de opções suficientes para armazenamento de energia advém da evolução recente do setor eletroprodutor e tendência veloz para a eletrificação do setor automóvel. A solução tecnológica que hoje se afirma como a mais vantajosa envolve baterias recarregáveis de iões de lítio (LIB) com diferentes configurações, acopláveis em sistemas estacionários de armazenamento de energia e veículos elétricos. Esta ...
Changing Social Perceptions on Mining-Related Activities: A Key Challenge in th...
A., MateusWe are living in a period of multiple and accelerating changes where new uncertainties emerge constantly. Guidelines for economic growth are changing, social demands and environmental concerns are growing, and technological advancements are succeeding at rates never seen before. The main drivers of these changes are mostly related to digitization, decarbonization and dematerialization processes of economies, wh...
Challenges and opportunities for a successful mining industry in the future
A., Mateus; Martins, LuísModern models of sustainable economic growth are metal-intensive and will not be successful in the future unless a continuous supply of mineral-derived products is ensured. Despite this being logical, there is still a significant reluctance regarding mineral exploration and mining activities, often reflected in: (i) unfavourable public opinions; and (ii) absence of political measures or continuity of agendas th...
Towards a multi-dimensional methodology supporting a safeguarding decision on t...
A., Mateus; Lopes, C.; Martins, L.; Carvalho, J.A multi-dimensional methodology is proposed to delimit areas hosting mineral resources of public importance (MRoPI). The assessment procedure considers the Level of Geological Knowledge (LGK) along with the Economic (Ec), Environmental (Ev) and Social Development and Acceptance (SDA) dimensions. Different sets of independent, but complementary and variably weighed, criteria support the appraisal of each dimensi...
Permian-Triassic maturation and multistage migration of hydrocarbons in the Ass...
A., Mateus; Riccomini, Claudio; Ferreira, Ezequiel J. E. C. B.; Tassinari, Colombo C. G.New lines of geological evidence strongly suggest that the main period of hydrocarbon maturation within Assistência Formation should be Permian-Triassic, stimulated by a high geothermal gradient that also sustained various manifestations of hydrothermal activity. Three main stages of fluid/hydrocarbon migration can also be inferred on the basis of multiscale observations: confined flow in late Permian to Triass...
Interplate versus intraplate strike-slip deformed belts: examples from SW Iberia
Romão, J.; Ribeiro, Antonio; Pereira, E.; Rodrigues, J.; A., Mateus; Noronha, F.; Dias, R.A complete transition in tectonic style between pure thrust belts and pure strike-slip beltscan be envisaged, both in interplate and intraplate settings, by a combination of thrust and strike-slipcomponents of displacement. The accommodation of shortening components in strike-slip deforma-tion belts has been discussed recently on the basis of two alternative perspectives: (1) the “sub-horizon-tal attachment mod...
Main characteristics and genesis of the Vale de Pães skarn (Cuba-Vidigueira, Os...
Salgueiro, R.; Inverno, C.; A., MateusThe Vale de Pães (Cuba-Vidigueira) mineralisation is composed of magnetite ± sulphides and hosted in a Pre-Variscan metamorphic sequence intruded by igneous rocks belonging to the Beja Igneous Complex. Its mineral and chemical features are compatible with a zoned Fe-skarn: Mg-rich (Fo + Di90, oxidised) and Ca-rich (Grs + Di81-39, oxidised or relatively reduced). In the Fe-Mg skarn, magnetite deposition occurred...