GF - Comunicações em actas de encontros científicos internacionais
Permanent URI for this collection
Browse
Browsing GF - Comunicações em actas de encontros científicos internacionais by Title
Now showing 1 - 10 of 18
Results Per Page
Sort Options
- Assessing the degree of fracturing and weathered layer thickness using seismic and GPR dataPublication . Carvalho, João P. F.; Pinto, Carlos C.; Lisboa, Jose; Sardinha, Rui; Catrapona, Afonso; Borges, José Fernando; Tlemçani, M.
- Characterization of a concealed fault zone using P and S-wave seismic reflection dataPublication . Carvalho, João P. F.; Ghose, R.; Pinto, Carlos C.; Borges, José Fernando
- 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.
- GeoERA´s contribution towards resilience in Europe’s raw materials supply chainsPublication . Wittenberg, Antje; De Oliveira, Daniel Pipa Soares; González, Javier; Flindt Jørgensen, Lisbeth; Held, TomThe well-being of society and the interdependencies of national economies depend heavily on reliably functioning supply chains as the COVID-19 pandemic proved this long-known statement in everyone's daily life. None of the supply chains can do without the mostly mineral raw materials. The United Nations sees raw materials as the key component for achieving all 17 Sustainable Development Goals (SDGs).
- 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
- Improving the seismic hazard evaluation of the Lisbon and Lower Tagus Valley areaPublication . Carvalho, João P. F.; Pinto, Carlos C.; Costa, M.; Heleno, S.; Silva, M.; Rabeh, Taha; Cooksley, G.; Carrilho, F.The Lisbon and surrounding area of the Lower Tagus Valley has experienced in the past the effects of several moderate sized earthquakes that caused significant damage and destruction. They have been attributed to local sources, though in some cases the source remains to be located. The lack of outcrops in the flat lying Quaternary terrains, the low slip-rates of the area in connection with sedimentation and erosion rates that erase surface ruptures are among the causes of a poor association between faults and seismicty, which has opened way to geophysical studies. Seismic, potential-field and seismicity data have been recently used to improve the seismic hazard evaluation of the area. In this work we complement these studies with DTM and PSInSAR data with the purpose of obtaining an accurate evaluation of the seismic hazard of the study area. The correlation of improved epicentre locations with major fault zones located from the above mentioned data shows that we have progressed in the understanding of the earthquake sources in the region. Some structures show no apparent relationship with present-day seismicity but some are known to be active into the Quaternary. Further geophysical and geological studies are required to understand the causes.
- 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.