Neogene Through Quaternary Tectonic Reactivation of SW Iberian Passive Margin |
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| Authors: | Email author" target="_blank">N?ZitelliniEmail author M?Rovere P?Terrinha F?Chierici L?Matias Bigsets Team |
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| Institution: | (1) Istituto di Scienze del Mare, Sezione di Bologna CNR, Via P. Gobetti, 101, 40129 Bologna, Italy;(2) Dipartimento di Scienza della Terra e Geologico-Ambientali, Università di Bologna, Via Zamboni, 67, 40120 Bologna, Italy;(3) Instituto Geológico e Mineiro, Departamento de Geologia Marinha, 2721–866 Amadora, Portugal;(4) Istituto Radio Astronomia, CNR, Matera, Italy;(5) Centro de Geofisica da Universidade de, Lisboa, Portugal;(6) Faculdade de Ciências da, Universidade de Lisboa, Departamento de Geologia, LATTEX, 1749–016 Lisboa, Portugal |
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| Abstract: | Southwest Portugal, the Gulf of Cadiz and Morocco are under the potential threat of natural hazards linked to seismicity and tsunami generation. We report the results of two multi-channel seismic (MCS) surveys carried out in 1992 and 1998 along the continental margin and oceanic crust of SW Iberia. This MCS data set shows the evidence of the compressional deformation which involves both the continental and the oceanic crust of the study area. The area of deformation extends from the southern border of the Tagus Abyssal Plain to the Seine Abyssal Plain, encompassing the continental margin of SW Portugal. Most of the structures observed are probably related to a Mid-Miocene phase of Africa-Europe plate convergence. In this paper we discuss the recent advances on the identification of the tectonic structures that are still active and that may generate great earthquakes and tsunamis. The tectonic structures identified are located respectively at the Guadalquivir Bank, along the eastern border of the Horseshoe Abyssal Plain and along the southern continental slope of SW Portugal.BIGSETS Team: L. Mendes Victor, C. Corela, A. Ribeiro, D. Cordoba, J. J. Danobeitia, E. Grácia, R. Bartolomé, R. Nicolich, G. Pellis, B. DellaVedova, R. Sartori, L. Torelli, A. Correggiari, L. Vigliotti. |
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| Keywords: | Southwest Iberia seismic reflection data active faulting compressional tectonic earthquake tsunami |
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