118613 20220921104420.0 doi 10.1016/j.tecto.2019.05.014 sideral 112591 ART-2019-112591 eng Marcén, Marcos Universidad de Zaragoza Strain variations in a seismogenic normal fault (Baza Sub-basin, Betic Chain): Insights from magnetic fabrics (AMS) 2019 AMS and structural analysis are here applied to study the deformed zone associated with a large-scale, active normal fault in the central Betic Cordillera (Spain), namely the Baza fault system, to determine: i) the kinematics of structures and their relation with fault zone architecture and segmentation degree, ii) the correlation between deformational structures and the different types of magnetic fabrics and iii) the evolution of magnetic fabrics patterns, from sedimentary to shear-related, associated with normal faults. Five outcrops (969 samples) were analysed along the fault trace, which shows different degrees of segmentation along strike and strong localization of deformation along narrow fault zones. A first, main set of magnetic fabric data corroborates the normal kinematics of the Baza fault, showing magnetic lineations parallel to the dip-slip, transport direction. A second, secondary set of magnetic lineations, is parallel to the intersection lineation, and can be related to less intense deformation in the fault rocks. Furthermore, a detailed study (523 samples) of a trench excavated across the fault zone, where two fault splays tend to coalesce in a linkage relay zone indicates that i) lithology and distance to fault planes are two factors that control the development of extension-related magnetic fabrics in weakly deformed sediments, ii) the development of shear-related fabrics in fault zones entails the mechanical rotation of minerals, iii) different orientation of magnetic lineations are related to different intensity of bulk deformation and iv) magnetic lineation is useful to define local deviations of deformation axes produced by changes in the local extension direction (from fault-perpendicular to fault-parallel extension) in the linkage zone between adjacent fault splays. Access copy available to the general public Unrestricted info:eu-repo/grantAgreement/ES/MINECO/BES-2014-070167 info:eu-repo/grantAgreement/ES/MINECO/CGL2013-42670-P info:eu-repo/semantics/openAccess by-nc-nd http://creativecommons.org/licenses/by-nc-nd/3.0/es/ 3.048 2019 GEOCHEMISTRY & GEOPHYSICS 31 / 84 = 0.369 2019 Q2 T2 1.529 2019 Geophysics 2019 Q1 Earth-Surface Processes 2019 Q1 info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion Román-Berdiel, Teresa Universidad de Zaragoza (orcid)0000-0002-9743-8695 Casas-Sainz, Antonio M. Universidad de Zaragoza (orcid)0000-0003-3652-3527 Soto, Ruth (orcid)0000-0002-1929-8850 Oliva-Urcia, Belén (orcid)0000-0003-1563-6434 Castro, Julia 2000 428 Universidad de Zaragoza Dpto. Ciencias de la Tierra Área Geodinámica Interna 765 (2019), 64-82 Tectonophysics Tectonophysics 0040-1951 2287389 http://zaguan.unizar.es/record/118613/files/texto_completo.pdf Postprint 1015928 http://zaguan.unizar.es/record/118613/files/texto_completo.jpg?subformat=icon icon Postprint oai:zaguan.unizar.es:118613 articulos driver 2022-09-21-09:24:26 ARTICLE