52 documents found, page 1 of 6
Análise sobre empregabilidade e associativismo nas áreas das Geociências em Por...
Luz, Filipa; Pereira, Ines; Maia, Miguel; Leal, Sara; Pereira, Ricardo; Roseiro, José; Casacão, João; São Pedro, Diogo; Moreira, NoelA empregabilidade e associativismo científico-profissional em Geociências em Portugal são raramente alvo de análise integrada. Neste estudo são analisados os resultados de um inquérito “online” promovido pelo projeto de comunicação de ciência “Sm-Ar-Te-F-O-Ne - Todos vêm das rochas”, em que os inquiridos responderam de forma voluntária, a questões associadas a empregabilidade, ligação entre academia e indústria...
Magnetite Talks: Testing Machine Learning Models to Untangle Ore Deposit Classi...
Nogueira, Pedro; Maia, MiguelA comprehensive investigation into the application of machine learning algorithms for accurately classifying mineral deposit types is presented. The study specifically focuses on iron deposits in the Portuguese Ossa-Morena Zone, employing a limited dataset of trace element geochemistry from magnetites. The research aims to derive meaningful methodological and metallogenic conclusions from the obtained results. ...
Wound, Ischemia, Foot Infection (Wifi) Classification System And Its Predictive...
Alves, Duarte Gil; Ferreira, Vítor; Teixeira, Gabriela; Vasconcelos, João; Maia, Miguel; Vidoedo, José; Almeida Pinto , JoãoIntroduction: Commonly used chronic limb-threatening ischemia (CLTI) classifications lack granularity and detail to precisely stratify patients according to risk of limb loss, expected revascularization benefit and mortality. The aim of this study is to evaluate in a Portuguese population the prognostic value of an updated CLTI classification based on Wound, Ischemia, and foot Infection (WIfI) proposed by the S...
Aplicação da análise Fry a ocorrências de Cu (-Fe) da Faixa Metalogénica Sousel...
Moreira, Noel; Dias, Rui; Roseiro, José; Nogueira, Pedro; Maia, Miguel; Araújo, AlexandreThe application of spatial point distribution analysis methods is widely used to find hidden orientations and internal organization of data. The application of these methods to mineralizations is recurrent since the beginning of the 20th century, namely applying the Fry classical method. This method is applied to the Cu (-Fe) occurrences of the Sousel-Barrancos Metallogenic Belt, and the first results are prese...
Combining Δ18o Isotope Data and In-Situ La-Icp-Ms Trace Element Analysis of Mag...
Maia, Miguel; Barrulas, Pedro; Nogueira, Pedro; Mirão, José; Noronha, FernandoThe Ossa-Morena Zone (OMZ, SW of the Iberian Peninsula) is a geotectonic domain that comprises a set of diversified ore deposits formed from Cambrian to Carboniferous-Permian ages. The Montemor-o-Novo – Ficalho Fe-Zn-(Pb) belt was a productive mining sector until the first half of the 20th century with potential for future mineral exploration, although the mechanisms responsible for ore deposition are, in some ...
In situ LA-ICP-MS trace element analysis of magnetite as a vector towards miner...
Maia, Miguel; Barrulas, Pedro; Nogueira, Pedro; Mirão, José; Noronha, FernandoThe Azenhas and Alvito Fe-deposits are located at SW of the Iberian Variscan belt, in a wide Fe-Zn ore district (Montemor-Ficalho Belt), part of the Ossa-Morena Zone. Both deposits are dominantly composed of magnetite ores that display distinct ore formation processes and, at the Azenhas deposit, massive magnetite ores are mainly hosted in amphibolites (Middle Cambrian – Ordovician), with a genesis arguably ass...
Ore Geology Reviews 142 (2022) 104736 Available online 3 February 2022 0169-136...
Maia, Miguel; Roseiro, José; Nogueira, Pedro; Noronha, Fernando; Fuertes-Fuente, Mercedes; Cepedal, Antonia; Mirão, JoséThe Escoural gold district belongs to the Montemor-Ficalho metallogenic belt which is part of the Portuguese section of Ossa-Morena Zone (OMZ), at the SW of Iberia. The Escoural gold district includes twelve gold pros- pects and/or deposits largely controlled by the NW-SE Montemor-o-Novo Shear Zone (MNSZ) and associated fault zones, extending for approximately 30 km. Ubiquitously, gold-arsenopyrite-loellingite ...
CLINICAL AND MUTATIONAL ANALYSIS OF A COHORT OF PORTUGUESE PATIENTS WITH PARAGA...
Rodrigues, Roger; R. Almeida, Maria; Carreiro, João; Assunção, António; Braga, Sandrina; Sousa, Joel; Camacho, Nelson; Garrido, Pedro; Maia, MiguelIntroduction: Representing 0.03% of all tumors, paragangliomas (PGLs) are extremely rare. During the past 15 years, there has been a significant progress in the knowledge of the genetics of PGLs. Germline mutations in succinate dehy- drogenase (SDH) genes are the commonest genetic cause of PGL. Objective: Given the high clinical relevance of the SDH status, we aimed to evaluate the diagnostic and prognostic val...
Multi-stage fluid system responsible for ore deposition in the Ossa-Morena Zone...
Maia, Miguel; Moreira, Noel; Vicente, Sandro; Mirão, José; Noronha, Fernando; Nogueira, PedroThe Mociços Cu-deposit is part of a cluster of ancient copper mines in the Sousel-Barrancos metallogenic belt in the Ossa-Morena Zone at the SW Iberia. The orebodies develop along NNW-SSE quartz-carbonate-sulfides veins with pyrite and chalcopyrite as the main sulfide phases, and ore emplacement has been attributed to copper remobilization from the metasedimentary host-rocks, though no detailed studies were con...
Mais de 30 anos de encontros de Geoquímica Ibérica: contributos do XII Congress...
Nogueira, Pedro; Moreira, Noel; Maia, Miguel; Roseiro, José; Silva, Eduardo; Kullberg, José CarlosO Congresso Ibérico de Geoquímica é neste momento um congresso de referência no âmbito da Geologia Ibérica, particularmente no domínio da Geoquímica. Os primeiros passos que levaram à realização deste encontro remontam ao longínquo ano de 1977, quando tem lugar a primeira Semana da Geoquímica, no Instituto Superior Técnico (Lisboa). Desde aí, com diversos formatos e periodicidades, o Congresso Ibérico de Geoquí...