51 documents found, page 1 of 6
Evaluation of EnMAP Hyperspectral Data for the Identification of Placers in the...
Araújo, L; Cardoso Fernandes, J; Azzalini, A; Carvalho, M; Lima, A; González, J; Teodoro, ACCritical Raw Materials are crucial to achieve the European Unions (EU) goals of a climate-neutral economy by 2050. The high supply risk led the EU to prioritise domestic mineral exploration. This study, part of the S34I - SECURE AND SUSTAINABLE SUPPLY OF RAW MATERIALS project, utilised remote-sensing-based methods to identify and map heavy-mineral (HM) placer deposits in the Ria de Vigo, located in Galicia, Spa...
Assessing the Potential of PlanetScope Imagery for Iron Oxide Detection in Anti...
Santos, D; Cardoso-Fernandes, J; Lima, A; Ana TeodoroThe increasing demand for critical raw materials, such as antimony-a semimetal with strategic relevance in fire-retardant applications, electronic components, and national security-has made the identification of European sources essential for the European Union's strategic autonomy. Remote sensing offers a valuable tool for detecting alteration minerals associated with subsurface gold and antimony deposits that...
Convolutional Neural Networks Applied to Antimony Quantification via Reflectanc...
Carvalho, M; Cardoso-Fernandes, J; Lima, A; Ana Teodoro<jats:p>Antimony (Sb) has gained significance as a critical raw material (CRM) within the European Union (EU) due to its strategic importance in various industrial sectors, particularly in the textile industry for flame retardants and as a component of Sb-based semiconductor materials. Moreover, Sb is emerging as a potential alternative for anodes used in lithium-ion batteries, a key element in the Energy trans...
Optimizing Exploration: Synergistic approaches to minimize false positives in p...
Santos, D; Azzalini, A; Mendes, A; Cardoso-Fernandes, J; Lima, A; Müller, A; Ana TeodoroPegmatites represent a critical source of raw materials for the European Union's future, emphasizing the need to explore new deposits. Remote sensing plays a pivotal role in early-stage pegmatite exploration, generating prospectivity maps to facilitate field validation. The higher the false positive rate, the higher the time and costs required for field campaigns. This study aims to devise an approach that mini...
Convolutional Neural Networks Applied to Antimony Quantification via Soil Labor...
Carvalho, M; Cardoso-Fernandes, J; Lima, A; Teodoro, ACAntimony (Sb) has gained significance as a critical raw material (CRM) within the European Union (EU) due to its strategic importance in various industrial sectors, particularly in the textile industry for flame retardants and as a component of Sb-based semiconductor materials. Moreover, Sb is emerging as a potential alternative for anodes used in lithium-ion batteries, a key element in the energy transition. T...
GREENPEG exploration for pegmatite minerals to feed the energy transition: firs...
Müller, A; Reimer, W; Wall, F; Williamson, B; Menuge, J; Brönner, M; Haase, C; Brauch, K; Pohl, C; Lima, A; Teodoro, A; Cardoso Fernandes, JThe GREENPEG project, which is funded by the European Commission Horizon 2020 Climate action, environment, resource efficiency and raw materials programme, aims to develop multimethod exploration toolsets for the identification of European, buried, small-scale (0.015 million m3 ) pegmatite ore deposits of the NbYF (NYF) and LiCsTa (LCT) chemical types. The project is being coordinated by the Natural History Mus...
Automated Lineament Extraction applied to high-resolution imagery Worldview-3 a...
Santos, D; Mendes, A; Azzalini, A; Cardoso Fernandes, J; Lima, A; Ana TeodoroLineament extraction is a commonly used technique in mineral exploration to identify geological structures such as fault scarps, joints, and folds. However, the accuracy of this technique can be limited by factors such as the low spatial resolution of the data. This study aims to address these limitations by exploring the potential of high spatial resolution data for extracting linear structures in Tysfjord, no...
Spectral Library of European Pegmatites, Pegmatite Minerals and Pegmatite Host-...
Cardoso-Fernandes, J; Santos, D; Rodrigues de Almeida, C; Lima, A; Teodoro, ACThe New Exploration Tools for European Pegmatite Green-Tech Resources (GREENPEG) spectral database contains the spectral signature, obtained through reflectance spectroscopy studies, of European pegmatites and minerals as well as their host rocks. Samples include pegmatites of the Nb-Y-F (NYF) and Li-Cs-Ta (LCT) chemical types and host rocks from pegmatite locations in Austria, Ireland, Norway, Portugal, and Sp...
The INOVMineral Projects Contribution to Mineral Exploration A WebGIS Integrati...
Cardoso-Fernandes, J; Santos, D; Almeida, CRd; Vasques, JT; Mendes, A; Ribeiro, R; Azzalini, A; Duarte, L; Lima, A; Teodoro, AC<jats:p>Due to the energetic transition at course, new geological exploration technologies are needed to discover mineral deposits containing critical materials such as lithium (Li). The vast majority of European Li deposits are related to LiCsTa (LCT) pegmatites. Literature review indicates that conventional exploration campaigns are dominated by geochemical surveys and related exploration tools. However, othe...
Mapping NYF pegmatite outcrops through high-resolution Worldview-3 imagery
Santos, D; Mendes, A; Azzalini, A; Cardoso Fernandes, J; Lima, A; Ana TeodoroSeveral studies on remote sensing and mineral exploration have been developed or improved in the last decade. However, the low spatial resolution of satellites is a recurring problem in many cases where the mineral or rock is much smaller than the pixel size of the satellite images. This phenomenon, called sub-pixel occurrence, generates an extremely mixed pixel that difficult the performance of conventional cl...