129688 20240319080953.0 doi 10.1016/j.tecto.2022.229274 sideral 128447 ART-2022-128447 eng Peiro, A. Universidad de Zaragoza Hanging-wall deformation at the active Sierra Palomera extensional fault (Jiloca basin, Spain) from structural, morphotectonic, geophysical and trench study 2022 Access copy available to the general public Unrestricted The NNW-SSE trending Sierra Palomera fault is characterized as an active, nearly pure extensional fault with mean transport direction towards N230°E, consistent with the ENE-WSW extension trajectories of the recent to present-day regional stress field. Its macrostructure is described from surface geology and magnetometric and electromagnetic surveys, which have allowed identifying two subsidiary, nearly parallel normal faults (antithetic and synthetic, respectively). The structural contour map of an extensive planation surface, dated to 3.8 Ma, provides a maximum fault throw s.s. of 330 m for the main fault (480 m including bending), and a net slip rate of 0.09–0.10 mm/a (0.13–0.15 mm/a including bending). Trench study focussed on the subsidiary antithetic fault shows evidence of its activity during Middle-Late Pleistocene times, offsetting ca. 2.5 m the slope of a well-preserved alluvial fan. Detailed analysis and retrodeformation of the antithetic fault and other minor ruptures in the trench has allowed defining seven deformation events. The lack of a consistent age model for the involved sedimentary sequence makes them almost meaningless in terms of paleoseismic history. However, geometry and sequential development of meso-scale faults (intermediate between seismic-scale and analogue models) allows unravelling the extensional deformation history within the hanging-wall block of the Sierra Palomera fault. Progressive rupture patterns reveal shifting from dominantly synthetic to dominantly antithetic faulting, suggesting both kinematical control linked to rollover growth, and dynamical control by the regional stress field. © 2022 Elsevier B.V. info:eu-repo/grantAgreement/ES/AEI/PID2019-108705GB-I00 info:eu-repo/grantAgreement/ES/DGA/E32-20R info:eu-repo/grantAgreement/ES/DGA-FEDER/LMP127-18 info:eu-repo/semantics/openAccess by-nc-nd http://creativecommons.org/licenses/by-nc-nd/3.0/es/ 2.9 2022 GEOCHEMISTRY & GEOPHYSICS 38 / 87 = 0.437 2022 Q2 T2 1.309 2022 Geophysics 2022 Q1 Earth-Surface Processes 2022 Q1 5.8 2022 info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion Simon, J.L. Universidad de Zaragoza (orcid)0000-0003-1412-5245 Arlegui, L.E. Universidad de Zaragoza (orcid)0000-0001-5091-9398 Ezquerro, L. García-Lacosta, A.I. Lamelas, M.T. Universidad de Zaragoza (orcid)0000-0002-8954-7517 Liesa, C.L. Universidad de Zaragoza (orcid)0000-0002-9130-117X Luzón, A. Universidad de Zaragoza (orcid)0000-0002-8929-9429 Martín-Bello, L. (orcid)0000-0002-2141-2624 Pueyo-Anchuela, O. Universidad de Zaragoza (orcid)0000-0002-1460-1590 Russo, N. 4013 205 Universidad de Zaragoza Dpto. Didácticas Específicas Área Didáctica Ciencias Exper. 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 3006 010 Universidad de Zaragoza Dpto. Geograf. Ordenac.Territ. Área Análisis Geográfico Regi. 828 (2022), 229274 [21 pp] Tectonophysics Tectonophysics 0040-1951 11916879 http://zaguan.unizar.es/record/129688/files/texto_completo.pdf Postprint 1899284 http://zaguan.unizar.es/record/129688/files/texto_completo.jpg?subformat=icon icon Postprint oai:zaguan.unizar.es:129688 articulos driver 2024-03-18-13:17:11 ARTICLE