RM - Comunicações em actas de encontros científicos internacionais
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- Abandoned mine slags analysis by EPMA WDS x-ray mappingPublication . Guimarães, Fernanda; Rosado, L.; Morais, C.; Candeias, A. E.; Pinto, A. P.; Mirao, JoseThe mining activity on the Iberian pyritic Belt (Portugal and Spain) started before Phoenician times, became particularly intense during the Roman occupation of the Iberian Peninsula (for gold) and after the industrial revolution (for gold, copper, zinc, lead and sulphur). The commonest ore of this region is a massive polymetalic sulphide accumulation, where pyrite (FeS2) is the main mineral, with variable concentrations of chalcopyrite (CuFeS2), sphalerite (ZnS), galena (PbS), arsenopyrite (FeAsS2), other sulphides and sulfosalts which include minor elements like Mn, Co, Ni, Se, Cd, Sb, Te, Hg and Bi. Some of the main and minor elements of these ores are hazardous and the drainage basins of pollutant source areas often induce health concerns in the resident population. Electron microprobe study followed previous optical and XRD analysis of the slags. The study focused on the identification of phases how sulphide and meta11ic phases are distributed within the material and infer about leachable elements during weathering. Electron microprobe X-Ray maps show evidences of different behavior between the elements: Ca and Zn are completely leached; iron is retained in oxyhydroxides, lead and arsenic precipitate as sulphates. Electron microprobe studies are essential to understand complex materials as earth materials. Nevertheless, care is required to a correct interpretation of data and most quantitative compositional data are not trustworthy.
- Ancient glazed ceramic tiles : a long-term, study from the remediation of environmental impacts to the non-destructive characterization of materialsPublication . Figueiredo, M. Ondina; Silva, Teresa; Veiga, JPSince the involvement in a national research project in 1995-1997 with the partnership of the National Tile Museum in Lisbon, until a recent European project with partners from Mediterranean countries which cultural patrimony entails glazed ceramic tiles, the authors have been active in the non-destructive characterization of ceramic and vitreous materials used to manufacture ancient decorated tiles (16th-19th century) through the access to the European Synchroton Research Facility (ESRF, Grenoble/France). As an input to the preservation of this important cultural patrimony through the improvement of restoration techniques, a synopsis is presented of the work so far developed.
- Application of the Play-Based Exploration Pyramid Approach Adapted to Deep Geothermal Resource Mapping at the European Scale in the EU GSEU ProjectPublication . Herms, Ignasi; Caldera, N.; Arnó, Georgina; Canteli, P.; García-Crespo, J.; Carrión, E.; Ramalho, Elsa; Carvalho, João; Nádor, A.; Steiner, C.; Janku, L.; Koevoets, M. J.ABSTRACT: This work introduces version 1.0 of the Pan-European Atlas of Sustainable GeoEnergy Capacities (SGC), developed within the GSEU (Geological Service for Europe) project. The Atlas applies the Play-Based Exploration Pyramid (PBEP) approach to harmonize and standardize the assessment of deep geothermal resources across Europe. The methodology follows a multiscale structure—Levels 0 to 3—that refines geothermal understanding from regional geosystems to detailed local targets. Version 1.0 has been published in spring 2025 via the European Geological Data Infrastructure (EGDI) and includes Levels 0 and 1. Level 0 provides public data from boreholes and thermal springs, serving as the base for Level 1, which maps favorable areas for geothermal exploration using Geothermal Play Typing (GPT). The release includes a catalogue of near 400 factsheets describing each GPT unit, along with a metadata report. Future versions (2.0 in 2025 and 3.0 in 2026) will introduce deeper layers of detail. Level 2 will identify potential geothermal reservoirs using 1D stochastic estimations of geothermal and heat storage potential. Level 3 will compile existing 2D/3D maps and models for detailed local-scale reservoir assessments. Altogether, the Atlas supports Europe's energy transition by enhancing knowledge and visibility of its deep geothermal potential.
- Blue pigments in XVI-XVII century glazes : a comparative study between portuguese faiences and chinese porcelainsPublication . Figueiredo, M. Ondina; Silva, Teresa; Veiga, JP; Prudêncio, Maria Isabel; Dias, Maria Isabel; Matos, M. A.; Pais, A. M.
- Blue pigments in XVI-XVII century glazes : a comparative study between portuguese faiences and contemporary chinese porcelains manufactured for portuguese marketPublication . Figueiredo, M. Ondina; Silva, Teresa; Veiga, JP; Prudêncio, M. Isabel; Dias, M. Isabel; Matos, Maria Antónia; Pais, Alexandre Manuel
- Characterization of placer gold deposits from central Portugal : preliminary resultsPublication . Ehser, Anja; Borg, Gregor; de Oliveira, Daniel Pipa Soares; Rosa, Diogo; Salgueiro, Rute
- Chemical elements variation in leaves with different development stages of Cistus plants from S. Domingos mine area, South PortugalPublication . Batista, Maria Joao; Gonzalez-Fernandez, Oscar; Abreu, Maria Manuela; Carvalho, L.Soils and leaves of Cistus ladanifer L. and Cistus salviifolius L. in different stages of development (young and mature) were sampled in different sites of the S. Domingos mine. The soils are thin and were developed on heterogeneous materials of metallurgical slags, gossanous materials and weathered host rocks. In general, mature leaves have higher concentrations of As, Cu, Fe, Mn, Pb and Zn than young leaves. Nevertheless, in Moitinhos site the young leaves have higher concentrations of As, Cu and Mn than mature leaves. Near the mining buildings C. ladanifer leaves have higher concentrations of As in mature leaves than C. salviifolius. The Pb concentrations in mature leaves are significantly higher and C. ladanifer contain two fold more than C. salviifolius leaves. Cistus plants show different behaviour on the trace elements uptake and translocation. This knowledge is useful in order to implement remediation programs in mine areas of the Mediterranean region using these pioneer plants.
- A critical look at raw materials criticalityPublication . de Oliveira, Daniel Pipa SoaresABSTRACT: In the eve of the proposed Critical Raw Materials Act published in March of 2023, Europe has realized that even with already predicted exponential growth in raw materials supply, the situation remains critical with regards provision of these (critical) raw materials (CRM). The various initiatives led by the EU Commission starting with the Raw Materials Initiative in 2008, the various CRM lists (2011, 2014, 2017, 2020 and 2023), the launch of several dedicated CRM task forces (e.g., ERECON), alliances (E.G., ERMA) and the objectives of the EU Green Deal mean that in a few short years, 7 in fact, the EU needs to find new sources for CRM. An impossible task.
- Deep geothermal resources in the Pan-European Atlas of Sustainable GeoEnergy Capacities (GSEU project): The Play-based Exploration Pyramid conceptPublication . Herms, Ignasi; Caldera, N.; Arnó, Georgina; Canteli, P.; García-Crespo, J.; Carrión, E.; Ramalho, Elsa; Carvalho, João; Nádor, A.; Steiner, C.; Janku, L.; Koevoets, M. J.ABSTRACT: This work introduces version 1.0 of the Pan-EU Atlas of Sustainable GeoEnergy Capacities (SGC), delivered by the GSEU (Geological Service for Europe) project. It details the methodology evolving from the Play-Based Exploration Pyramid (PBEP) concept into a practical approach for sharing harmonized knowledge about deep geothermal energy potential across Europe. This Atlas aims to deliver a standardized and generalized understanding of geothermal resources, emphasizing the potential in the framework of the Europe’s sustainable energy transition. The PBEP concept of the PanEU Atlas of SGC follows a multiscale geothermal exploration approach that systematically narrows focus from a geosystem to local scale, organizing technical and scientific data from broad, low-knowledge areas to highly detailed high-knowledge regions or local targets. It aims to ensure a refined understanding of geothermal plays, improving the identification of potential areas across Europe, spanning four levels (Level 0 to Level 3) and incorporating further refined knowledge in the assessment of geothermal resource. Levels 0 and 1 GIS datasets were published along spring 2025 in the European Geological Data Infrastructure (EGDI) as version 1.0 of the Atlas. Information available includes public data from boreholes and thermal springs (Level 0), which forms the basis for Level 1 - a harmonized map highlighting favourable prospecting areas for deep-origin geothermal resources, classified according to Geothermal Play Types (GPTs). This is accompanied by a catalogue of factsheets for each delineated GPTs across EU (~ 400 in total), summarizing the generalized findings along with a report on description and metadata. This scale-dependent process will continue in version 2 of the Atlas, with Level 2 focusing on identified potential geothermal reservoirs using 1D lumped stochastic estimations for geothermal resources and medium to high heat storage potential into deep aquifers. Finally, Level 3 will provide detailed local-scale evaluations of specific targets, compiling already existing maps and models containing spatial-distributed reservoir assessed information in 2D and/or 3D.
- Exposure to ionizing radiation and dangerous substances inside buildings related to construction productsPublication . Carvalho, F.P.; Paiva, J.V.; Carvalho, Jorge; Batista, Maria JoaoABSTRACT: The use of many materials of geological origin and recycled materials in the construction of buildings faces an increasing demand and stricter regulation for quality control. Construction products are requested to meet safety standards including those for radon exhalation and gamma radiation emission, amongst other dangerous substances, because if unchecked they could deteriorate the quality and safety of the indoor environment. Construction products shall pass testing for radioactivity in order to meet those standards and to maintain a high ranking position in the international markets.