23 documents found, page 1 of 3
Spectral Angle Mapper Application Using Sentinel-2 in Coastal Placer Deposits i...
Ng-Cutipa, WL; Lobato, A; González, FJ; Georgalas, GP; Zananiri, I; Carvalho, M; Cardoso-Fernandes, J; Somoza, L; Piña, R; Lunar, R; Teodoro, ACRemote sensing applications for marine placer deposit exploration remain limited due to the mineralogical complexity and dynamic coastal processes. This study presents the first medium- to high-level detailed multi-scale remote sensing analysis of placer deposits in the R & iacute;as Baixas, NW Spain, focusing on five beaches within the Vigo Estuary. Ten beach samples were analyzed for their heavy mineral (HM) ...
AetherGeo: A Spectral Analysis Interface for Geologic Mapping
Santos, G; Cardoso-Fernandes, J; Teodoro, ACAetherGeo is a standalone piece of software (current version 1.0) that aims to enable the user to analyze raster data, with a special focus on processing multi- and hyperspectral images. Being developed in Python 3.12.4, this application is a free, open-source alternative for spectral analysis, something considered beneficial for researchers, allowing for a flexible approach to start working on the topic withou...
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...
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...
SPECTRAL UNMIXING AND THE POTENTIAL OF WORLDVIEW-3 SATELLITE DATA FOR PEGMATITE...
Santos, D; Mendes, A; Azzalini, A; Cardoso-Fernandes, J; Alexandre Lima; Ana TeodoroRemote Sensing has been successfully applied in the identification of pegmatitic targets. However, the spatial resolution of open data satellites, which is often much larger than the outcrop size of the target mineral or rock, has been a recurrent challenge in this scientific field. This restricts remote sensing methods that are dependent on large outcrop sizes for successful identification. This work applied s...
Li-rich pegmatites and related peraluminous granites of the Fregeneda-Almendra ...
Roda-Robles, E; Vieira, R; Lima, A; Errandonea-Martin, J; Pesquera, A; Cardoso-Fernandes, J; Garate-Olave, IBased on field and petrographic observations, mineralogical, geochemical (whole-rock by ICP-MS, ICP-OES, ISE and PGNAA) and geochronological (Ar-Ar on mica and U-Pb on columbite) data, ten pegmatite types and one type of cassiterite-rich quartz hydrothermal veins have been distinguished in the Fregeneda-Almendra field (FA) (Central Iberian Zone), some of them highly enriched in Li (included in petalite, spodume...