GF - Comunicações em actas de encontros científicos internacionais
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Browsing GF - Comunicações em actas de encontros científicos internacionais by Author "Carvalho, João"
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- Developing a site-conditions map for seismic hazard assessment in PortugalPublication . Narciso, João; Vilanova, Susana; Lopes, Isabel; Oliveira, Carlos Sousa; Carvalho, João; Pinto, Carlos C.; Borges, José Fernando; Nemser, Eliza
- Earthquake mitigation in the Lisbon and Lower Tagus Valley area, PortugalPublication . Carvalho, João; Dias, Ruben Pereira; Pinto, Carlos C.; Cunha, Taigo A.; Leote, Jaime; Vilanova, Susana; Narciso, João; Borges, José Fernando; Ghose, Ranajit
- Earthquake mitigation in the Lisbon and Lower Tagus Valley area, PortugalPublication . Carvalho, João; Dias, Ruben Pereira; Pinto, Carlos C.; Cunha, Tiago A.; Leote, Jaime; Vilanova, Susana; Narciso, João; Borges, José Fernando; Ghose, Ranajit
- Estimation of imageable dip range of target structures in interferometric salt flank imaging with limited illuminationPublication . Loureiro, A.; Van der Neut, J.; Alves, Daniela; Carvalho, João; Afilhado, Alexandra; Draganov, D.; Matias, L.; Martins, T.
- Improving the knowledge on seismogenic sources in Lower Tagus Valley for seismic hazard purposesPublication . Carvalho, João; Pinto, Carlos C.; Costa, M.; Duarte, H.; Terrinha, Pedro; Rabeh, Taha; Borges, José Fernando; Dias, Ruben Pereira; Caldeira, Bento
- Integration of seismic, well, potential-field and geological data for ore prospecting in the Iberian Pyrite BeltPublication . Carvalho, João; Sousa, Pedro; Matos, João Xavier; Pinto, Carlos C.Ore prospecting using gravimetric and magnetic data has become one of the traditional approaches in the last decades, often complemented with electric and electromagnetic methods. However, due to the problem of non-uniqueness inherent to potential-filed modelling, constrains provided by structural methods such as seismic reflection are often used. During the exploration of massive sulphide polimetallic minerals in the Iberian Pyrite Belt Figueira de Cavaleiros sector, located in the Sado Tertiary Basin, several gravimetric and magnetic anomalies were considered as interesting targets. In order to reduce ambiguity of the gravimetric modelling and to confirm the geological model of the area, two seismic reflection profiles were acquired. The interpretation of these profiles was assisted by three mechanical boreholes, two of them located in the research area, in order to make a seismostratigraphic interpretation. Unfortunately, the gravimetric modelling suggests that the anomaly has a lithological and structural origin and is not related with massive sulphides. Nevertheless, a good agreement between the seismic and potential-field data was achieved and new insights into the geological model for the region were obtained form this work, with accurate data about the Tertiary cover and Palaeozoic basement.
- Is the Vila Franca de Xira fault still active? A shallow seismic reflection shear-wave study in an intraplate environmentPublication . Carvalho, João; Ghose, Ranajit; Loureiro, Afonso Vargas; Pinto, Carlos C.; Borges, José Fernando
- The signature of a small-throw fault affecting unconsolidated sediments in S-wave reflection seismic dataPublication . Carvalho, João; Ghose, Ranajit; Loureiro, A.
- Updated geothermal assessment of Lower Cretaceous aquifer in Lisbon region, PortugalPublication . Marrero Diaz, Rayco; Ramalho, Elsa; Costa, Augusto Marques da; Ribeiro, Maria Luísa; Carvalho, João; Pinto, Carlos C.; Rosa, Diogo; Correia, Antonio