129685 20240104122548.0 doi 10.1016/j.jsg.2017.08.003 sideral 101930 ART-2017-101930 eng Simón, José L. Universidad de Zaragoza (orcid)0000-0003-1412-5245 Assessing interaction of active extensional faults from structural and paleoseismological analysis: The Teruel and Concud faults (eastern Spain) 2017 The relationship of independence, interaction or linkage between two neighbouring intraplate active extensional faults, the Teruel and Concud faults, are investigated from structural and paleoseismological data, and the results are discussed to improve seismic hazard assessment for the region. This paper provides the structural and paleoseismological characterization of the almost unknown Teruel Fault from detailed mapping and trench analysis, and discusses its kinematic and dynamic relationships with the Concud Fault. Four individual events occurred between 76.0 ka and 9.2 ka BP have been recorded at two branches of the Teruel Fault. Unfortunately, these only represent a small fraction of its overall activity during such time lapse, and their time constraints do not allow correlating them with those at the Concud Fault. The Teruel and Concud faults are independent structures from the geometric and kinematic point of view, as evinced by their distinct (i) transport directions (N275°E and N220°E, respectively), and (ii) average coseismic displacements (0.5 m and 1.9 m, respectively). These displacements are consistent with their respective lengths (9.0 km and 14.2 km) and significantly smaller than those expected for a hypothetically joint Concud-Teruel, 23 km-long fault. However, their displacement gradients close to the relay zone indicate that both faults undergo dynamic interaction, thus suggesting a transient stage from independence to linkage. We hypothesize that slip on both structures occurred, at the scale of the seismic cycle, in a broadly alternating manner, which induced strain partitioning between them and allowed accommodating bulk biaxial extension in the region. Such deformation pattern would have increased the earthquake frequency with respect to the scenario of a hypothetically linked Concud-Teruel Fault, but diminished the potential seismic magnitude. Access copy available to the general public Unrestricted info:eu-repo/grantAgreement/ES/MINECO/BES-2010-031339 info:eu-repo/grantAgreement/ES/MINECO/CGL2012-35662 info:eu-repo/semantics/openAccess by-nc-nd http://creativecommons.org/licenses/by-nc-nd/3.0/es/ 2.622 2017 GEOSCIENCES, MULTIDISCIPLINARY 61 / 189 = 0.323 2017 Q2 T1 1.615 2017 Geology 2017 Q1 info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion Arlegui, Luis E. Universidad de Zaragoza (orcid)0000-0001-5091-9398 Ezquerro, Lope (orcid)0000-0003-0900-1440 Lafuente, Paloma Liesa, Carlos L. Universidad de Zaragoza (orcid)0000-0002-9130-117X Luzón, Aránzazu Universidad de Zaragoza (orcid)0000-0002-8929-9429 2000 428 Universidad de Zaragoza Dpto. Ciencias de la Tierra Área Geodinámica Interna 2000 280 Universidad de Zaragoza Dpto. Ciencias de la Tierra Área Estratigrafía 103 (2017), 100-119 J. struct. geol. Journal of Structural Geology 0191-8141 3562717 http://zaguan.unizar.es/record/129685/files/texto_completo.pdf Postprint 1863371 http://zaguan.unizar.es/record/129685/files/texto_completo.jpg?subformat=icon icon Postprint oai:zaguan.unizar.es:129685 articulos driver 2024-01-04-10:01:29 ARTICLE