@article {Rosas2012, title = {{Thrust{\textendash}wrench interference between major active faults in the Gulf of Cadiz (Africa{\textendash}Eurasia plate boundary, offshore SW Iberia): Tectonic implications from coupled analog and numerical modeling}}, journal = {Tectonophysics}, volume = {548-549}, year = {2012}, month = {jun}, pages = {1{\textendash}21}, abstract = {Analog and numerical modeling experiments were carried out to investigate the tectonic interference between intersecting major active strike-slip and thrust faults in the Gulf of Cadiz (Africa-Eurasia plate boundary, offshore SW Iberia). The obtained results show that newly mapped tectonic features located in the fault intersection area (corner zone) consist mostly in oblique (dextral-reverse) faults that accommodate significant strain partitioning. Modeling of this corner-zone faults show that they have endured some degree of rotation, displaying successive evolving geometries and kinematics. Numerical modeling results further show that an interbedded shallow soft layer, accounting for a regional (Late Miocene) gravitational "Chaotic" unit, could explain the mild bathymetric expression of the fault pattern in the corner-zone. Moreover, a recognized depth discrepancy, between the (upper crust) interference fault-pattern and the (lithospheric mantle) seismicity, is interpreted as a manifestation of similar thrust-wrench tectonic interference at different lithospheric depths. Accordingly, an intermediate lower crust-upper mantle aseismic (i.e. softened) depth-domain could be explained by pervasive alteration/serpentinization, prompted by fluid percolation through fault-related fractures associated with the newly revealed corner zone fault-network. Overall obtained results reinforce the relevance of a thrust-wrench multi-rupture seismic scenario as the main cause for the moderate seismicity (Mw < 6.0) in the study area. {\textcopyright} 2012 Elsevier B.V.}, keywords = {Analog and numerical modeling, Fault interference, Gulf of Cadiz, Lithospheric mantle seismicity, Multi-rupture seismic hazards, Thrust-wrench tectonics}, issn = {00401951}, doi = {10.1016/j.tecto.2012.04.013}, url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-84862115104\&partnerID=tZOtx3y1}, author = {Rosas, F.M. and Duarte, J.C. and Neves, M.C. and Terrinha, P. and Silva, S. and Matias, L. and Gr{\`a}cia, E. and Bartolome, R.} } @article {Nemser, title = {{Compilation of parameterized seismogenic sources in Iberia for the SHARE European-scale seismic source model.}}, year = {2010}, pages = {201{\textendash}204}, keywords = {Database, Fault, Seismogenic, SHARE}, isbn = {978-84-693-6088-0}, url = {https://dspace.uevora.pt/rdpc/handle/10174/6247}, author = {Nemser, E.S. and Garc{\'\i}a-Mayordomo, J. and Cabral, J. and Fonseca, J. and Mart{\'\i}nez-D{\'\i}az, J.J. and Alfaro Garc{\'\i}a, P. and {\`A}lvarez G{\'o}mez, J.A. and Atakan, K. and Aza{\~n}{\'o}n Hern{\'a}ndez, J.M. and Basili, R. and Besana-Ostman, G.M. and Bezzeghoud, M. and Borges, J.F. and Brum da Silveira, A. and Carlos Lopes, F. and Carvalho, J. and Dias, R.P. and Figueiredo, P.M. and Garc{\'\i}a Fern{\'a}ndez, M. and Giner Robles, J. and Gonzalez, A. and Gr{\`a}cia, E. and Gutierrez, F. and Insua Ar{\'e}valo, J.M. and Jim{\'e}nez, M.J. and Jim{\'e}nez-D{\'\i}az, A. and Lafuente Tom{\'a}s, P. and Lucha, P. and Madeira, J. and Martin Gonz{\'a}lez, F. and Masana, E. and Matias, L. and Moreno, X. and Ortu{\~n}o, M. and Perea, H. and P{\'e}rez L{\'o}pez, R. and Rodr{\'\i}guez Pascua, M.A. and Ruano, P. and Santanach, P. and Sanz de Galdeano, C. and Silva Barroso, P. and Silva, S. and Sim{\'o}n, J.L. and Terrinha, P. and Vilanova, S. and Villamor, P. and Wong, J.} } @article {Geissler2010, title = {{Focal mechanisms for sub-crustal earthquakes in the Gulf of Cadiz from a dense OBS deployment}}, journal = {Geophysical Research Letters}, volume = {37}, number = {18}, year = {2010}, month = {sep}, pages = {n/a{\textendash}n/a}, abstract = {An eleven-month deployment of 25 ocean bottom seismometers provides an unprecedented opportunity to study low-magnitude local earthquakes in the complex transpressive plate boundary setting of the Gulf of Cadiz, known for the 1755 Lisbon earthquake and tsunami. 36 relocated earthquakes (ML 2.2 to 4.8) concentrate at 40-60 km depth, near the base of the seismogenic layer in \~{}140 Ma old oceanic mantle lithosphere, and roughly align along two perpendicular, NNE-SSW and WNW-ESE striking structures. First motion focal mechanisms indicate compressive stress for the cluster close to the northern Horseshoe fault termination which trends perpendicular to plate convergence. Focal mechanisms for the second cluster near the southern termination of the Horseshoe fault indicate a strike-slip regime, providing evidence for present-day activity of a dextral shear zone proposed to represent the Eurasia-Africa plate contact. We hypothesize that regional tectonics is characterized by slip partitioning. {\textcopyright} 2010 by the American Geophysical Union.}, issn = {00948276}, doi = {10.1029/2010GL044289}, url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-77957722745\&partnerID=tZOtx3y1}, author = {Geissler, W. H. and Matias, L. and Stich, D. and Carrilho, F. and Jokat, W. and Monna, S. and IbenBrahim, A. and Mancilla, F. and Gutscher, M.-A. and Sallar{\`e}s, V. and Zitellini, N.} } @article {Zitellini2009, title = {{The quest for the Africa{\textendash}Eurasia plate boundary west of the Strait of Gibraltar}}, journal = {Earth and Planetary Science Letters}, volume = {280}, number = {1-4}, year = {2009}, month = {apr}, pages = {13{\textendash}50}, abstract = {The missing link in the plate boundary between Eurasia and Africa in the central Atlantic is presented and discussed. A set of almost linear and sub parallel dextral strike-slip faults, the SWIM11SWIM is the acronym of the ESF EuroMargins project "Earthquake and Tsunami hazards of active faults at the South West Iberian Margin: deep structure, high-resolution imaging and paleoseismic signature". Faults, that form a narrow band of deformation over a length of 600~km coincident with a small circle centred on the pole of rotation of Africa with respect to Eurasia, was mapped using a new swath bathymetry compilation available in the area offshore SW Portugal. These faults connect the Gloria Fault to the Rif-Tell Fault Zone, two segments of the plate boundary between Africa and Eurasia. The SWIM faults cut across the Gulf of Cadiz, in the Atlantic Ocean, where the 1755 Great Lisbon earthquake, M \~{} 8.5-8.7, and tsunami were generated, providing a new insight on its source location. {\textcopyright} 2008 Elsevier B.V. All rights reserved.}, keywords = {Africa-Eurasia plate boundary, Great Lisbon Earthquake, Gulf of Cadiz, Iberia, Nubia}, issn = {0012821X}, doi = {10.1016/j.epsl.2008.12.005}, url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-62749129333\&partnerID=tZOtx3y1}, author = {Zitellini, N. and Gr{\`a}cia, E. and Matias, L. and Terrinha, P. and Abreu, M.A. and DeAlteriis, G. and Henriet, J.P. and Da{\~n}obeitia, J.J. and Masson, D.G. and Mulder, T.} }