Browsing by Issue Date, starting with "2010-10"
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- A re-assessment of the organic maturation and palynostratigraphy of the wells Ruivo-1 and Corvina, offshore Algarve Basin PortugalPublication . Fernandes, Paulo; Borges, Marisa; Rodrigues, B.; Matos, V.The Algarve Basin is the southernmost geological province of portugal. The nowledge of its offshore geology is limited to a few hydrocarbon exploration wells and seismic profiles. Two of these wells, Ruivo-1 and Corvina, were studied in order to assess its organic maturation levels and age using the biostratigraphy of dinoflagellate cysts. The well Ruivo-1 intercepted a thick Callovian succession whereas the well Corvina intercepted a thick Oxfordian succession. Both Jurassic successions are within the oil-window.
- Seismotectonics of the Gulf of Cadiz: new insights from instrumental seismicityPublication . Silva, S. M.; Romsdorf, M.; Matias, L.; Terrinha, Pedro; Geissier, W.
- New seismic source zone model for Portugal and Azores for use in SHARE: methodology and preliminar resultsPublication . Vilanova, Susana; Oliveira, Carlos Sousa; Silveira, A. Brum da; Madeira, J.; Nemser, Eliza; Fonseca, J. F. B. D.; Arvidsson, R.; Besana-Ostman, G. M.; Bezzeghoud, Mourad; Borges, José Fernando; Cabral, João; Carvalho, João P. F.; Cunha, Pedro Proença e; Dias, Ruben Pereira; Lopes, Fernando Carlos; Perea, H.; Wong, I.
- Heat and mass transfer effects in a passive direct methanol fuel cell: 1D modelPublication . Oliveira, V. B.; Rangel, C. M.; Pinto, A. M. F. R.
- Foraminifera from the Lower-Middle Jurassic of the Lusitanian Basin, Portugal: biostratigraphic and palaeocological significancePublication . Canales, M. L.; Henriques, Maria Helena; Figueiredo, Vera; Guterres, H. C.
- Morphostructure of the S. Vicente Canyon, Marquês de Pombal Fault and Pereira de Sousa Fault (SW Iberia margin)Publication . Cunha, D.; Roque, Ana Cristina; Silva, F.; Silva, E. A.; Lourenço, Nuno; Abreu, M. Pinto deThe S. Vicent Canyon (SVC), Marquês de Pombal Fault (MPF) and Pereira de Sousa Fault (PSF) are located along the SW Iberian margin. The SVC appears to be controlled by the S. Vicent Fault (SVF), a steep NE-SW striking fault that outcrops along the southeast flank of the canyon. To better understand the SVC, MPF and PSF structures and the Meso-Cenozoic morphostructural evolution of this sector it is important to identify the main tectonic phases from the Mesozoic up to Plio-Quaternary. To attain this objective, the main regional structures were mapped using 2D seismic lines and multibeam swath bathymetry data, allowing the mapping of the northern prolongation of PSF and the identification of faults that do not reach the sea floor.
- Middle-Upper Jurassic palynology of the Sagres region and the Carrapateira Outlier, southern PortugalPublication . Borges, Marisa; Fernandes, Paulo; Pereira, Zélia; Riding, James B.The palynology of the Middle-Upper Jurassic fill of the Sagres region (Algarve Basin) and the Carrapateira outlier, southern Portugal was investigated. Samples were collected from Mareta beach, Cilheta beach and the Carrapateira outlier. Dinoflagellate cysts are confined to the Upper Bajocian to Upper Callovian sedimentary rocks exposed at Mareta and Cilheta beaches and the Lower Kimmeridgian strata of the Carrapateira outlier. The palynostratigraphical study of the Jurassic successions has yielded new biostratigraphical data based on dinoflagellate cysts and miospores. The results confirm, and in some cases refine, the existing macrofaunal age determinations of these successions.
- Characterizing active faults and associated mass transport deposits in the South Iberian Margin (Alboran Sean and Gulf of Cadiz): on-fault and off-fault paleoseismic evidencePublication . Gràcia, Eulàlia; Bartolomé, Rafale; Lo Iacono, C.; Moreno, X.; Martínez-Loriente, S.; Perea, Hector; Masana, E.; Pallàs, R.; Diez, S.; Dañobeitia, Juanjo J.; Terrinha, Pedro; Zitellini, N.During the last years we have carried out successive high-resolution marine geological and geophysical surveys to investigate the seismic potential of the slow-moving seismogenic faults from the South Iberian Margin. Based on ,ultiscale acoustic mapping, sub-seafloor seismic imaging and dating methods we have characterized submarine fault systems with unprecedented resolution. We present primary paleoseismic evidence obtained by direct investigations of selected faults from theMediterranean Sea (i.e. Carboneras Fault, Bajo Segura Fault, Adra Fault) and the external part of the Gulf of Cadiz (i.e. Marques de Pombal Fault, Horseshoe Fault, Coral Patch Ridge Fault and SWIM lineaments). The obtained fault seismic parameters suggest that these faults are active and capable of generating large magnitude (Mw > 6) seismic events, representing an earthquake and tsunami hazard for the surrounding coastal areas. Secondary paleoseismic evidence in the SW Iberian Margin (based on landslides and turbidite deposits) yields a regional recurrence rate of large magnitude earthquake of 1800 - 2000 years.
- Compilation of parameterized seismogenic sources in Iberia for the SHARE European-scale seismic source modelPublication . Nemser, Eliza; García-Mayordomo, J.; Cabral, João; Fonseca, J. F. B. D.; Martínez-Díaz, J. J.; Alfaro García, Pedro; Álvarez-Gómez, J. A.; Atakan, K.; Azañón Hernández, J. M.; Basili, R.; Besana-Ostman, G. M.; Bezzeghoud, Mourad; Borges, José Fernando; Silveira, A. Brum da; Lopes, Fernando Carlos; Carvalho, João P. F.; Dias, Ruben Pereira; Figueiredo, P. M.; García Fernández, M.; Giner-Robles, J. L.; González, A.; Gràcia, Eulália; Gutiérrez, F.; Insua Arévalo, J. M.; Jiménez, M. J.; Jiménez-Díaz, A.; Lafuente Tomás, P.; Lucha, P.; Madeira, J.; Martín González, F.; Masana, E.; Matias, L.; Moreno, X.; Ortuño, M.; Perea, H.; Pérez López, R.; Rodríguez Pascua, M. A.; Ruano, P.; Santanach, P.; Sanz de Galdeano, C.; Barroso, P. Silva; Silva, S.; Simón, J. L.; Terrinha, Pedro; Vilanova, Susana; Villamor, P.; Wong, I.
- Active faults and geomorphology in the seafloor between the Gibraltar straits and the Tore-Madeira RisePublication . Terrinha, Pedro; Duarte, João; Valadares, Vasco; Rosas, Filipe M.; Matias, L.; Batista, L.; Gonçalves, João Noiva; Cunha, T.; Silva, S.; Gràcia, Eulàlia; Zitellini, N.Apresenta-se um mapa tectónico das falhas activas e um mapa geomorfologico entre a Crista Tore-Madeira e o estreito de Gibraltar. Classificam-se as falhas do ponto de vista geométrico, cinemático e cronológico. Apresentam-se resultados de modelação numérica e análoga para a interferência de falhas de desligamento dextrógiro (próximas de WNW-ESE/90º) e cavalgamento (NE-SW/SE) e ainda para a interferência destas falhas de desligamento com o prisma acrecionário do Golfo de Cádis. Os resultados experimentais sugerem que no primeiro caso de interferência simulado se formam falhas de coalescência entre os desligamentos e os cavalgamentos, locais onde se concentra a sismicidade registada durante 12 meses por 25 OBS (2006-07). As experiências sugerem ainda que o prisma acrecionário e os desligamentos são ambos activos no presente. Discute-se a partição da deformação e a migração da frente de deformação ao longo da Margem Ocidental Ibérica.