@booklet {HensenC.ScholzF.MarianneN.ValadaresV.GraciaE.TerrinhaP.LiebetrauV.KaulN.SilvaS.Martinez-lorienteS.BartolomeR.PineroE.MagalhaesV.H.SchmidtM.WeiseS.M.CunhaM.HilarioA.Pereah.RovelliL.2014, title = {{Strike-slip Faults Mediate the Rise of Basement-Derived Fluids and Mud Volcanism in the Deep Sea}}, year = {2014}, keywords = {Geology}, author = {Hensen, C. and Scholz, F. and Marianne, N. and Valadares, V. and Gr{\`a}cia, E. and Terrinha, P. and Liebetrau, V. and Kaul, N. and Silva, S. and Martinez-Loriente, S. and Bartolome, R. and Pi{\~n}ero, E. and Mag{\~a}lhaes, V.H. and Schmidt, M. and S.M., Weise and Cunha, M. and Hilario, A. and Perea, H. and Rovelli, L. K.} } @article {Gutscher2012, title = {{The Gibraltar subduction: A decade of new geophysical data}}, journal = {Tectonophysics}, volume = {574-575}, year = {2012}, month = {oct}, pages = {72{\textendash}91}, abstract = {The Gibraltar arc, spans a complex portion of the Africa-Eurasia plate boundary marked by slow oblique convergence and intermediate and deep focus seismicity. The seemingly contradictory observations of a young extensional marine basin surrounded by an arcuate fold-and-thrust belt, have led to competing geodynamic models (delamination and subduction). Geophysical data acquired in the past decade provide a test for these models and support a narrow east-dipping, subduction zone. Seismic refraction studies indicate oceanic crust below the western Gulf of Cadiz. Tomography of the upper mantle reveals a steep, east-dipping high P-wave velocity body, beneath Gibraltar. The anisotropic mantle fabric from SKS splitting shows arc-parallel "fast directions", consistent with toroidal flow around a narrow, westward retreating subducting slab. The accompanying WSW advance of the Rif-Betic mountain belt has constructed a thick pile of deformed sediments, an accretionary wedge, characterized by west-vergent thrust anticlines. Bathymetric swath-mapping images an asymmetric embayment at the deformation front where a 2. km high basement ridge has collided. Subduction has slowed significantly since 5. Ma, but deformation of recent sediments and abundant mud volcanoes suggest ongoing activity in the accretionary wedge. Three possible origins for this deformation are discussed; gravitational spreading, overall NW-SE convergence between Africa and Iberia and finally a WSW tectonic push from slow, but ongoing roll-back subduction. In the absence of arc volcanism and shallow dipping thrust type earthquakes, evidence in favor of present-day subduction can only be indirect and remains the object of debate. Continued activity of the subduction offers a possible explanation for great (M. >. 8.5) earthquakes known to affect the area, like the famous 1755 Great Lisbon earthquake. Recent GPS studies show SW motion of stations in N Morocco at velocities of 3-6. mm/yr indicating the presence of an independent block, a "Rif-Betic-Alboran" microplate, situated between Iberia and Africa. {\textcopyright} 2012 Elsevier B.V.}, keywords = {Accretionary wedge, Active deformation, earthquakes, Iberia, Roll-back subduction, Tethys oceanic lithosphere}, issn = {00401951}, doi = {10.1016/j.tecto.2012.08.038}, url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-84867273669\&partnerID=tZOtx3y1}, author = {Gutscher, M.-A. and Dominguez, S. and Westbrook, G.K. and Le Roy, P. and Rosas, F. and Duarte, J.C. and Terrinha, P. and Miranda, J.M. and Graindorge, D. and Gailler, A. and Sallar{\`e}s, V. and Bartolome, R.} } @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 {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.} }