Semi-Automatization of Support Vector Machines to Map Lithium (Li) Bearing Pegmatites

Joana Cardoso-Fernandes, Ana C. Teodoro, Alexandre Lima, Encarnación Roda-Robles Machine learning (ML) algorithms have shown great performance in geological remote sensing applications. The study area of this work was the Fregeneda–Almendra region (Spain–Portugal) where the support vector machine (SVM) was employed. Lithium (Li)-pegmatite exploration using satellite data presents some challenges since pegmatites are, by nature, […]

The Esmolfe-Matança granite (Penalva do Castelo, central Portugal): A keystone to understand the ascent and emplacement of magmas under low tectonic stress

Ana Gonçalves, Helena Sant’ovaia, Maria dos Anjos Ribeiro, Fernando Noronha The Esmolfe–Matança ilmenite-type granite is analyzed using petrography, microstructures, anisotropy of magnetic susceptibility and microfracturing. The granite occurs in two separated bodies outcropping in distinct villages, Esmolfe and Matança, which are located in the termination of the Juzbado-Penalva do Castelo (JPCSZ) and Dúrico-Beirão (DBSZ) shear […]

Geochemical Signature and Magnetic Fabric of Capinha Massif (Fundão, Central Portugal): Genesis, Emplacement and Relation with W–Sn Mineralizations

Ana Gonçalves, Helena Sant’Ovaia, Fernando Noronha The Fundão–Serra da Estrela–Capinha (FSEC) region is characterized by peraluminous to metaluminous Variscan granites intrusive in a complex and thick metasedimentary sequence. This work seeks to characterize the Capinha granite (CG), understand its spatial and genetic relationship with the host Peroviseu–Seia (PS), Belmonte–Covilhã (BC) and Fáguas granites, and evaluate […]

Assessment of impacts on ecosystem services provided by geodiversity in highly urbanised areas: A case study of the Taubaté Basin, Brazil

Fernanda Coyado Reverte, Maria da Glória Motta Garcia, JoséBrilha, Alan Uchoa Pellejero This work presents a method to identify, to evaluate and to quantify the losses of the offer of ecosystem services provided by geodiversity, using as a case study the Taubaté Basin region, a highly urbanized portion of southeastern São Paulo State, Brazil. Our […]

Landscapes and Landforms of the Beira Baixa Region (Sarzedas–Monfortinho, Eastern Central Mainland Portugal)

Pedro P. Cunha, António A. Martins, Alberto Gomes, David R. Bridgland The Beira Baixa is a low-relief region that is transitional between the Portuguese Central Range and the South Portugal Planation Surface. The main regional geomorphological unit is a planation surface cut on the phylites/metagreywackes of the basement, locally with granite inselbergs and quartzite ridges. Tectonic landforms […]

Terras de Cavaleiros Geopark: A UNESCO Global Geopark

Diamantino Insua Pereira, Paulo Pereira The Terras de Cavaleiros Geopark (TCG), a UNESCO Global Geopark, is located in Northern Portugal and is established on rare and unique geological, scenic, ecological and cultural values. The most significant geological value is related to the most complete sequence of Pre-Mesozoic allochthonous geological units in NW Iberia. The Vilariça fault […]

Geoconservation in Portugal with Emphasis on the Geomorphological Heritage

José Brilha, Paulo Pereira Geoconservation in Portugal has been gaining importance, particularly during the last decade. The inventory of geosites with international and national scientific relevance is now complete, and the national legislation concerning nature conservation includes the management of geoheritage. Forty-three per cent of the inventoried geosites are geomorphosites, showing the importance of this type […]

The Geomorphological Landscape of Trás-os-Montes and Alto Douro

  Diamantino Insua Pereira, Paulo Pereira The Geomorphological Landscape of Trás-os-Montes and Alto Douro The main geomorphological features of the eastern part of the Trás-os-Montes and Alto Douro region are presented, namely the Iberian Meseta, the residual ridges, the Serra de Montesinho, the tectonic landforms and the Douro River incision. The Iberian Meseta is represented by […]

The Granite and Glacial Landscapes of the Peneda-Gerês National Park

Paulo Pereira, Diamantino Insua Pereira The Granite and Glacial Landscapes of the Peneda-Gerês National Park Granite and glacial landforms are presented as the main geomorphological landscape features of the Peneda-Gerês National Park. The park was established in 1971 and it is the only national park and most important protected area in Portugal. The aesthetic attractiveness is supported mainly […]

Characterization of an Intraplate Seismogenic Zone Using Geophysical and Borehole Data: The Vila Franca de Xira Fault, Portugal

João Carvalho; Daniela Alves; João Cabral; Ranajit Ghose; José Borges; Ruben Dias; Elsa Ramalho; Bento Caldeira; João Casacão; Jaime Leote   The Vila Franca de Xira (VFX) fault is a regional fault zone located about 25 km northeast of Lisbon, affecting Neogene sediments. Recent shear‐wave seismic studies show that this complex fault zone is buried beneath […]