Alexandre Lima
YOU?
Author Swipe
View article: EXPERIENCE REPORT ON THE CONSTRUCTION OF A MEDICAL RECORD FOR INTEGRATIVE AND COMPLEMENTARY HEALTH PRACTICES AT CEPIC/UFT
EXPERIENCE REPORT ON THE CONSTRUCTION OF A MEDICAL RECORD FOR INTEGRATIVE AND COMPLEMENTARY HEALTH PRACTICES AT CEPIC/UFT Open
This experience report describes the development of a specific medical record for Integrative and Complementary Health Practices at the Center for Integrative and Complementary Health Practices of the Federal University of Tocantins. The i…
View article: Assessing the Potential of PlanetScope Imagery for Iron Oxide Detection in Antimony Exploration
Assessing the Potential of PlanetScope Imagery for Iron Oxide Detection in Antimony Exploration Open
The 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 …
View article: Assessing the Potential of PlanetScope Imagery for Iron Oxide Detection in Antimony Exploration
Assessing the Potential of PlanetScope Imagery for Iron Oxide Detection in Antimony Exploration Open
The 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 …
View article: The GREENPEG Project Toolset to Explore for Buried Pegmatites Hosting Lithium, High-Purity Quartz, and Other Critical Raw Materials
The GREENPEG Project Toolset to Explore for Buried Pegmatites Hosting Lithium, High-Purity Quartz, and Other Critical Raw Materials Open
This contribution is a new multimethod toolset to explore for buried, small-scale (0.01–5 million m3) rare metal and high-purity quartz pegmatites, which was developed as part of the four-and-a-half-year European Union H2020 GREENPEG proje…
View article: Enhancing spectral imaging with multi-condition image fusion
Enhancing spectral imaging with multi-condition image fusion Open
Spectral Imaging techniques such as Laser-induced Breakdown Spectroscopy (LIBS) and Raman Spectroscopy (RS) enable the localized acquisition of spectral data, providing insights into the presence, quantity, and spatial distribution of chem…
View article: Evaluation of EnMAP Hyperspectral Data for the Identification of Placers in the Rias Baixas Region (Spain)
Evaluation of EnMAP Hyperspectral Data for the Identification of Placers in the Rias Baixas Region (Spain) Open
Critical 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 SUSTAI…
View article: Unsupervised and interpretable discrimination of lithium-bearing minerals with Raman spectroscopy imaging
Unsupervised and interpretable discrimination of lithium-bearing minerals with Raman spectroscopy imaging Open
As lithium-bearing minerals become critical raw materials for the field of energy storage and advanced technologies, the development of tools to accurately identify and differentiate these minerals is becoming essential for efficient resou…
View article: Crystallization Sequence of the Spodumene-Rich Alijó Pegmatite (Northern Portugal) and Related Metasomatism on Its Host Rock
Crystallization Sequence of the Spodumene-Rich Alijó Pegmatite (Northern Portugal) and Related Metasomatism on Its Host Rock Open
The Barroso–Alvão region is an excellent setting for studying Li mineralization associated with granitic pegmatites and developing Li exploration techniques. Among the distinguished pegmatite types in this pegmatite field, the spodumene-be…
View article: Multi-Sensor Approach for Cobalt Exploration in Asturias (Spain) Using Machine Learning Algorithms
Multi-Sensor Approach for Cobalt Exploration in Asturias (Spain) Using Machine Learning Algorithms Open
<p>This study explores dimensionality reduction techniques, namely, PCA (Principal Component Analysis) and ICA (Independent Component Analysis), to condense Earth Observation (EO) data obtained from Landsat 9 and PRISMA satellites to…
View article: Unsupervised Learning Applied to Sentinel-1 for Shallow Waters Exploration in Galicia (Spain)
Unsupervised Learning Applied to Sentinel-1 for Shallow Waters Exploration in Galicia (Spain) Open
<p>The Horizon Europe S34I project aims to enhance exploration methods to secure critical raw materials (CRM) and location management through innovative methods to<br>process Earth Observation data. Placer detection u…
View article: Convolutional Neural Networks Applied to Antimony Quantification via Soil Laboratory Reflectance Spectroscopy in Northern Portugal: Opportunities and Challenges
Convolutional Neural Networks Applied to Antimony Quantification via Soil Laboratory Reflectance Spectroscopy in Northern Portugal: Opportunities and Challenges Open
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 compone…
View article: Assessing the vulnerability of oil-dependent countries in Europe
Assessing the vulnerability of oil-dependent countries in Europe Open
In this article, we attempt to assess the vulnerability of European oil-dependent countries, using the Weighted Russell Directional Distance Model, which provides a composite index and allows for the analysis of adjustments in different pr…
View article: Impact of using a 3.5 &#956;m film to analyze the chemical composition of crystal samples with a handheld X-Ray Fluorescence equipment
Impact of using a 3.5 μm film to analyze the chemical composition of crystal samples with a handheld X-Ray Fluorescence equipment Open
Some potassium-feldspar crystals from lithium-rich aplite-pegmatites from Northern Portugal have been analyzed with a handheld X-Ray-Fluorescence (XRF) equipment. This study compares the impact of analyzing the samples with an XRF film ver…
View article: Convolutional Neural Networks Applied to Antimony Quantification via Reflectance Spectroscopy Using Soils from Northern Portugal: Opportunities and Challenges
Convolutional Neural Networks Applied to Antimony Quantification via Reflectance Spectroscopy Using Soils from Northern Portugal: Opportunities and Challenges Open
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 compone…
View article: Mapping NYF pegmatite outcrops through high-resolution Worldview-3 imagery
Mapping NYF pegmatite outcrops through high-resolution Worldview-3 imagery Open
Several 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 …
View article: Sentinel data for critical raw materials (CRM) exploration: first results of the S34I project
Sentinel data for critical raw materials (CRM) exploration: first results of the S34I project Open
To achieve sustainable development goals, it is crucial to ensure the best practices through the whole mining cycle of Critical Raw Materials (CRM) used in high-tech, low-carbon goods (batteries, wind turbines, electronics). This is the ai…
View article: Spectral Library of European Pegmatites, Pegmatite Minerals and Pegmatite Host-Rocks – the GREENPEG project database
Spectral Library of European Pegmatites, Pegmatite Minerals and Pegmatite Host-Rocks – the GREENPEG project database Open
The 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 hos…
View article: The INOVMineral Project’s Contribution to Mineral Exploration—A WebGIS Integration and Visualization of Spectral and Geophysical Properties of the Aldeia LCT Pegmatite Spodumene Deposit
The INOVMineral Project’s Contribution to Mineral Exploration—A WebGIS Integration and Visualization of Spectral and Geophysical Properties of the Aldeia LCT Pegmatite Spodumene Deposit Open
Due to the current energetic transition, 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 Li–Cs–Ta …
View article: The INOVMineral Project’s Contribution to Mineral Exploration – A WebGIS Integration and Visualization of Spectral and Geophysical Properties of the Aldeia LCT Pegmatite Spodumene Deposit
The INOVMineral Project’s Contribution to Mineral Exploration – A WebGIS Integration and Visualization of Spectral and Geophysical Properties of the Aldeia LCT Pegmatite Spodumene Deposit Open
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 Li–Cs–T…
View article: Li-rich pegmatites and related peraluminous granites of the Fregeneda-Almendra field (Spain-Portugal): A case study of magmatic signature for Li enrichment
Li-rich pegmatites and related peraluminous granites of the Fregeneda-Almendra field (Spain-Portugal): A case study of magmatic signature for Li enrichment Open
Based on field and petrographic observations, mineralogical, geochemical (whole-rock by ICP-MS, ICP-OES, ISE and PGNAA) and geochronological (ArAr on mica and UPb on columbite) data, ten pegmatite types and one type of cassiterite-rich qua…
View article: Comment on essd-2022-386
Comment on essd-2022-386 Open
Abstract. The 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 Nb-Y-F (NYF) and Li-Cs-Ta (LCT)-…
View article: Calibrating a Handheld LIBS for Li Exploration in the Barroso–Alvão Aplite-Pegmatite Field, Northern Portugal: Textural Precautions and Procedures When Analyzing Spodumene and Petalite
Calibrating a Handheld LIBS for Li Exploration in the Barroso–Alvão Aplite-Pegmatite Field, Northern Portugal: Textural Precautions and Procedures When Analyzing Spodumene and Petalite Open
In pegmatites containing abundant petalite and spodumene, such as those from the Barroso–Alvão (BA) aplite-pegmatite field, calibrating a portable laser-induced breakdown spectroscopy (pLIBS) equipment to identify and analyze these mineral…
View article: Intelligent grids for faster elemental mapping with Laser-induced breakdown spectroscopy
Intelligent grids for faster elemental mapping with Laser-induced breakdown spectroscopy Open
Laser-induced breakdown spectroscopy is a spectroscopic technique that allows for fast elemental mapping of heterogeneous samples. Yet, detailed maps need high-resolution sampling grids, which can turn the task into a time-consuming proces…
View article: Spectral Library of European Pegmatites, Pegmatite Minerals and Pegmatite Host-Rocks – The GREENPEG Project Database
Spectral Library of European Pegmatites, Pegmatite Minerals and Pegmatite Host-Rocks – The GREENPEG Project Database Open
The 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 Nb-Y-F (NYF) and Li-Cs-Ta (LCT)-type pegma…
View article: A LCT Pegmatite Spectral Library of the Aldeia spodumene deposit: contributes to mineral exploration
A LCT Pegmatite Spectral Library of the Aldeia spodumene deposit: contributes to mineral exploration Open
Studies focused on methodologies for locating and prospecting Li-Cs-Ta (LCT) pegmatites are increasingly relevant, given their importance for the energy market in a scenario where new sources need to be identified. Considering the inherent…
View article: A LCT Pegmatite Spectral Library of the Aldeia spodumene deposit: contributes to mineral exploration
A LCT Pegmatite Spectral Library of the Aldeia spodumene deposit: contributes to mineral exploration Open
Studies focused on methodologies for locating and prospecting Li-Cs-Ta (LCT) pegmatites are increasingly relevant, given their importance for the energy market in a scenario where new sources need to be identified. Considering the inherent…
View article: A LCT Pegmatite Spectral Library of the Aldeia spodumene deposit: contributes to mineral exploration
A LCT Pegmatite Spectral Library of the Aldeia spodumene deposit: contributes to mineral exploration Open
Studies focused on methodologies for locating and prospecting Li-Cs-Ta (LCT) pegmatites are increasingly relevant, given their importance for the energy market in a scenario where new sources need to be identified. Considering the inherent…