{"id":406,"date":"2015-08-18T16:15:48","date_gmt":"2015-08-18T16:15:48","guid":{"rendered":"http:\/\/wdb.ugr.es\/~aperezl\/?page_id=406"},"modified":"2024-10-13T09:57:18","modified_gmt":"2024-10-13T09:57:18","slug":"diapirismo-y-sedimentacion","status":"publish","type":"page","link":"https:\/\/wpd.ugr.es\/~aperezl\/web\/?page_id=406","title":{"rendered":"Tectonics, diapirism and sedimentation"},"content":{"rendered":"<p style=\"text-align: justify;\"><span style=\"color: #993300;\">En la Zona Externa de la Cordillera B\u00e9tica los materiales Tri\u00e1sicos presentan facies bechoides y estructuras complejas que no son f\u00e1ciles de interpretar. En ocasiones se puede interpretar que en los afloramientos de facies yes\u00edferas tri\u00e1sicas existen tanto facies resedimentadas (olistostr\u00f3micas) del Cenozoico como diap\u00edricas. No obstante, estudios m\u00e1s recientes hacen pensar m\u00e1s en los factores tect\u00f3nicos como determinantes de las estructuras geol\u00f3gicas presentes en gran parte de la Zona Externa de la Cordillera. Aunque la expresi\u00f3n de gran parte de estas brechas\/megabrechas est\u00e1n condicionadas por la presencia de evaporitas y por su comportamiento pl\u00e1stico, la estructura geol\u00f3gica final est\u00e1 marcada por una tect\u00f3nica marcada por extensas zonas de falla con una componente importante de salto en direcci\u00f3n, posterior a una tect\u00f3nica de mantos y a una tect\u00f3nica salina preorog\u00e9nica.<\/span><\/p>\n<hr \/>\n<p><span style=\"color: #0000ff;\"><strong><em>Tectonics<\/em><\/strong><strong><em>, 36, 1006\u20131036 (2017).<\/em><\/strong><\/span><\/p>\n<h3><strong>An evaporite\u2010bearing accretionary complex in the northern front of the Betic\u2010Rif Orogen<\/strong><\/h3>\n<p><em>F. P\u00e9rez-Valera, M. S\u00e1nchez-G\u00f3mez, A. P\u00e9rez-L\u00f3pez, L.A. P\u00e9rez-Valera<\/em><\/p>\n<p><a href=\"https:\/\/doi.org\/10.1002\/2016TC004414\">https:\/\/doi.org\/10.1002\/2016TC004414<\/a><\/p>\n<h4>ABSTRACT<\/h4>\n<p style=\"text-align: justify;\">The Guadalquivir Accretionary Complex forms a largely oblique prism at the northern edge of the Betic-Rif orogen, where Miocene sediments plus allochthonous evaporite-bearing units were accreted during the displacement of the Albor\u00e1n Domain toward the west. Traditional interpretations end the tectonic structuring of the Betic Cordillera at the present topographic front, beyond which gravitational and\/or diapiric processes would predominate. However, this study shows pervasive tectonic deformation in the outer prism with coherent oblique shortening kinematics, which is achieved through an alternation of roughly N-S arcuate thrust systems connected by E-W transfer fault zones. These structures accord well with the geophysical models that propose westward rollback subduction. The main stage of tectonic activity occurred in the early-middle Miocene, but deformation lasted until the Quaternary with the same kinematics. Evaporite rocks played a leading role in the deformation as evidenced by the suite of ductile structures in gypsum distributed throughout the area. S- and L- gypsum tectonites, scaly clay fabrics, and brittle fabrics coexist and consistently indicate westward motion (top to 290\u00b0), with subordinate N-S contraction almost perpendicular to the transfer zones. This work reveals ductile tectonic fabrics in gypsum as a valuable tool to elucidate the structure and deformational history of complex tectonic m\u00e9langes involving evaporites above the d\u00e9collement level of accretionary wedges.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>En la Zona Externa de la Cordillera B\u00e9tica los materiales Tri\u00e1sicos presentan facies bechoides y estructuras complejas que no son f\u00e1ciles de interpretar. En ocasiones se puede interpretar que en los afloramientos de facies yes\u00edferas tri\u00e1sicas existen tanto facies resedimentadas (olistostr\u00f3micas) del Cenozoico como diap\u00edricas. No obstante, estudios m\u00e1s recientes hacen pensar m\u00e1s en los <a href=\"https:\/\/wpd.ugr.es\/~aperezl\/web\/?page_id=406\" class=\"more-link\">...contin\u00faa leyendo<span class=\"screen-reader-text\"> \"Tectonics, diapirism and sedimentation\"<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":12,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-406","page","type-page","status-publish","h-entry","hentry","h-as-page"],"_links":{"self":[{"href":"https:\/\/wpd.ugr.es\/~aperezl\/web\/index.php?rest_route=\/wp\/v2\/pages\/406","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wpd.ugr.es\/~aperezl\/web\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/wpd.ugr.es\/~aperezl\/web\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/wpd.ugr.es\/~aperezl\/web\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/wpd.ugr.es\/~aperezl\/web\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=406"}],"version-history":[{"count":4,"href":"https:\/\/wpd.ugr.es\/~aperezl\/web\/index.php?rest_route=\/wp\/v2\/pages\/406\/revisions"}],"predecessor-version":[{"id":1744,"href":"https:\/\/wpd.ugr.es\/~aperezl\/web\/index.php?rest_route=\/wp\/v2\/pages\/406\/revisions\/1744"}],"up":[{"embeddable":true,"href":"https:\/\/wpd.ugr.es\/~aperezl\/web\/index.php?rest_route=\/wp\/v2\/pages\/12"}],"wp:attachment":[{"href":"https:\/\/wpd.ugr.es\/~aperezl\/web\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=406"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}