Carlos Inverno, um investigador em geologia económica e aplicada ao serviço da ciência

ABSTRACT: Carlos Manuel Clériguinho Inverno (born on 7/3/1953, Lisbon) was awarded degrees of BSc and License in Geology by the Univ. of Lisbon, Portugal, in 1973 and 1975, respectively. Under the supervision of Prof. Richard W. Hutchinson, a PhD in Geology (sp. Geochemistry) by the Colorado School of Mines followed in 1991, which granted equivalence as Doutor em Geologia (Metalogenia) by the Univ. of Lisbon in 1992. He was a postdoctoral researcher at the Univ. of Tasmania and its Centre for Ore Deposit Research (CODES) in 2000-2001 (advisor, Prof. Michael Solomon) and earned Tenure (Agregação) at the Univ. of Lisbon in 2008.info:eu-repo/semantics/publishedVersio

Critical Raw Material Resource Potentials in Europe

ABSTRACT: The vulnerability of economies and the associated familiar lifestyles have led to numerous policy measures in Europe. The proposed Critical Raw Materials Act (CRMA) sets indicative targets for 2030. A sustainable change in the supply situation requires the targeted exploration of raw materials precisely within the framework of national geological research of suitable detail and in advance of entrepreneurial raw material projects. EU projects like GeoERA assist in shaping the tailor-made exploration programs fit for purpose. GeoERA scientific projects like FRAME and MINDeSEA completed, and updated existing mineral data on CRM are publicly available through EuroGeoSurveys’ European Geological Data Infrastructure (EGDI).info:eu-repo/semantics/publishedVersio

Nivelamento de dados para corrigir efeitos de bordadura, provenientes de diferentes levantamentos de prospeção geoquímica

ABSTRACT: The existence of a large number of chemical analyses resulting from decades of geochemical exploration campaigns, yields huge numbers of analytical results produced with different analytical methods, sampling protocols and sampling means. Therefore, it is necessary to level these analytical results to make them comparable and thus take advantage of the potential of geochemical information from contiguous areas. In this study, a levelling technique was used on geochemical datasets of tested bands between the 1:25 000 scale maps, 293/294 and 305/306 sheets, respectively, from the Beira Baixa region where stream sediments were sampled during a project for rare earth elements exploration. These samples were analysed for lanthanum by the same analytical methods and in the same laboratory, but in different periods and the border effects were observed. These levelling techniques must be adapted to the data to be compared and in the present case the disappearance of the border effect of the analytical results of 293/294 and 305/306 topographic sheets was observed.RESUMO: A existência de um grande número de análises químicas resultantes de décadas de campanhas de prospeção geoquímica produz um grande número de resultados analíticos com diferentes métodos analíticos, protocolos e meios de amostragem. Nesse sentido, é necessário nivelar estes resultados analíticos para torná-los comparáveis e assim aproveitar o potencial da informação geoquímica de áreas contíguas. Neste estudo foi utilizada uma técnica de nivelamento de dados de geoquímica baseada em bandas testadas com larguras variadas entre os mapas à escala 1:25 000, 293/294 e 305/306, respetivamente, da região da Beira Baixa. Nestes, foram amostrados sedimentos de corrente durante um projeto de prospeção de Elementos de Terras Raras. Essas amostras foram analisadas para lantânio pelos mesmos métodos analíticos e no mesmo laboratório, mas em períodos diferentes e foram observados efeitos de bordadura. As técnicas de nivelamento foram adaptadas aos dados a comparar e observou-se o desaparecimento do efeito bordadura dos resultados analíticos entre as cartas topográficas 293/294 e 305/306.info:eu-repo/semantics/publishedVersio

CdTe detector based PIXE mapping of geological samples

A sample collected from a borehole drilled approximately 10 km ESE of Bragança, Trás-os-Montes, was analysed by standard and high energy PIXE at both CTN (previous ITN) PIXE setups. The sample is a fine-grained metapyroxenite grading to coarse-grained in the base with disseminated sulphides and fine veinlets of pyrrhotite and pyrite. Matrix composition was obtained at the standard PIXE setup using a 1.25 MeV H+ beam at three different spots. Medium and high Z elemental concentrations were then determined using the DT2fit and DT2simul codes (Reis et al., 2008, 2013 [1] and [2]), on the spectra obtained in the High Resolution and High Energy (HRHE)-PIXE setup (Chaves et al., 2013 [3]) by irradiation of the sample with a 3.8 MeV proton beam provided by the CTN 3 MV Tandetron accelerator. In this paper we present results, discuss detection limits of the method and the added value of the use of the CdTe detector in this context

Earth observation contribution as a component for mineral resources systems

Apresentação em Powerpoint com 24 diapositivo

Critical raw materials deposits map of mainland Portugal: new mineral intelligence in cartographic form

ABSTRACT: Reliable and unhindered access to raw materials is a growing concern within the EU and across the globe and the demand for Critical Raw Materials (CRM) plays a crucial economic role in most developed countries around the world. These are of extreme importance for supply chains regarding new technologies, sustainability issues and carbon footprint reduction. The definition of a continuously updated list of CRM by the European Commission led to the first CRM Map of Europe in 2016. Following this, several countries have been surveying, preparing, and evaluating their mineral occurrences to create a resources/deposits database and, therefore, to create a CRM map of their own. With this purpose in mind, we present and explain the first Critical Raw Materials Deposits Map of mainland Portugal, at 1:700,000 scale. This paper describes the scientific, technical, and graphical methodologies involved in its design.info:eu-repo/semantics/publishedVersio

Sustentabilidade mineral no setor português da Faixa Piritosa Ibérica

ABSTRACT: The Iberian Pyrite Belt (IPB) is one of the most important volcanogenic massive sulphide districts in the world and has been mined during more than 5 000 years. Its early and rich mining history is known to have been very important in Tartessian and Roman times when working the oxidation and cementation zones of the deposits for gold, silver and copper preferentially took place in the outcropping deposits. Even after continuous metal extraction for more than 5000 years, the IPB retains exceptionally large metal reserves. The IPB remains a hub of continued research and exploration and as a consequence, sulphide reserves in the IPB are being continuously increased with new discoveries: Aguas Teñidas, Lagoa Salgada, Las Cruces, Migollas, Masa Valverde, Vallejin, Las Cruces, Semblana and Monte Branco, La Magdalena and Sesmarias. While today's mining activities are focused in massive and stockwork ores and confined to 7 Portuguese and Spanish districts: Aljustrel, Neves-Corvo, Sotiel-Migollas, Rio Tinto, Aznalcollar Los Frailes, Tharsis and Las Cruces, the IPB retains a large potential for non-traditional (or accessory ores) products. In light of the critical raw materials and the concepts of the circular economy, the IPB has the potential to be an important source of accessory metals; sourced from both primary and secondary ores and mine waste, that fall both in the strategic and critical domains. Metals like indium, selenium, germanium, rhenium and the precious metals are targets to seek in future exploration scenarios within the IPB, particularly in the Portuguese sector and in key near mining areas.RESUMO: A Faixa Piritosa Ibérica (FPI) é uma das mais importantes províncias de sulfuretos maciços do mundo e tem sido explorada durante mais de 5 000 anos. A sua rica história de mineração é conhecida por ter sido muito importante nos tempos Tartessianos e Romanos, onde o trabalho ocorreu principalmente sobre os jazigos aflorantes, nomeadamente nas suas zonas de oxidação e cimentação dos depósitos de ouro, prata e cobre. Mesmo após a extração contínua de metais por mais de 5000 anos, a FPI mantém reservas de metal excecionalmente elevadas. A FPI contempla hoje todo o seu potencial favorável à prospeção mineral, observando-se uma intensa atividade extrativa e, consequentemente, um aumento das reservas, patente em novas descobertas como Águas Teñidas, Lagoa Salgada, Las Cruces, Migollas, Masa Valverde, Vallejin, Las Cruces, Semblana e Monte Branco, La Madalena, Sesmarias e Elvira. Embora a lavra ativa esteja atualmente limitada a 7 concelhos portugueses e espanhóis como Aljustrel, Neves-Corvo, Sotiel-Migollas, Rio Tinto, Aznalcollar-Los Frailes, Tharsis e Las Cruces, a FPI mantém um grande potencial para produtos minerais não tradicionais (ou acessórios). À luz das matérias-primas críticas e dos conceitos da economia circular, a FPI tem o potencial para ser uma importante fonte de metais acessórios, que se inserem nos domínios estratégicos e críticos, os quais são observados quer em minérios primários e secundários, quer em escombreiras mineiras. Metais como índio, selénio, germânio, rénio e elementos preciosos são alvos a serem procurados em cenários futuros de prospeção dentro da FPI, em particular no seu setor português e, sobretudo, em áreas de near mining exploration.info:eu-repo/semantics/publishedVersio