{"id":61348,"date":"2018-03-09T22:49:14","date_gmt":"2018-03-09T22:49:14","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/geoqua%c2%admica-y-geocronologa%c2%ada-de-las-ofiolitas-de-galicia\/"},"modified":"2018-03-09T22:49:14","modified_gmt":"2018-03-09T22:49:14","slug":"geoqua%c2%admica-y-geocronologa%c2%ada-de-las-ofiolitas-de-galicia","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/geoqua%c2%admica-y-geocronologa%c2%ada-de-las-ofiolitas-de-galicia\/","title":{"rendered":"Geoqu\u00edmica y geocronolog\u00eda de las ofiolitas de galicia"},"content":{"rendered":"<h2>Tesis doctoral de <strong> Sonia S\u00e1nchez Mart\u00ednez <\/strong><\/h2>\n<p>La cadena varisca europea, resultado del ensamblado de la \u00faltima pangea en tiempos paleoz\u00f3icos, incluye una compleja zona de sutura que se extiende desde el sw de la pen\u00ednsula ib\u00e9rica hasta el macizo de bohemia. Formando parte de esta sutura, se han descrito varios conjuntos de rocas b\u00e1sicas y ultrab\u00e1sicas de afinidad oce\u00e1nica, las unidades ogiol\u00edticas, que en general representan los dominios oce\u00e1nicos consumidos durante la convergencia y colisi\u00f3n de laurentia-b\u00e1ltica y gondwana. En los complejos al\u00f3ctonos de galicia (nw del macizo ib\u00e9rico) se pueden identificar seis de estas unidades, que reciben los nombres de unidad de care\u00f3n, unidad de bazar, unidad de purrido, unidad de vila de cruces, unidad de moeche y m\u00e9lange de somozas. en esta tesis doctoral se han estudiado cinco de las unidades ofiol\u00edticas del nw del macizo ib\u00e9rico uunidades de care\u00f3n, bazar, purrido, vila de cruces y moeche) desde el punto de vista geoqu\u00edmico y geocronol\u00f3gico, con el fin de datar aquellas cuya edad a\u00fan se desconoc\u00eda y determinar su ambiente tect\u00f3nico de generaci\u00f3n; de este modo pueden resolverse las dudas acerca de su posible correlaci\u00f3n y proponer un modelo para su origen. A la luz de los resultados obtenidos a lo largo del desarrollo de este trabajo, la hip\u00f3tesis inicial seg\u00fan la cual estas ofiolitas se interpretaban como los restos desmembrados de un dominio oce\u00e1nico simple, el oc\u00e9ano rheico, cuyo ciclo vital desde su apertura hasta su cierre se considera que tuvo lugar entre el c\u00e1mbrico superior-ordov\u00edcico inferior y el dev\u00f3nico, ha resultado no ser correcta. El escenario geol\u00f3gico que revelan estas unidades m\u00e1ficas es mucho m\u00e1s complejo y fascinante, ya que abarca un periodo bastante dilatado de la historia geol\u00f3gica de nuestro planeta, y est\u00e1 comprendido al menos entre el mesoproteroz\u00f3ico y el dev\u00f3nico, lo que al menos duplica la edad hasta ahora conocida de los terrenos m\u00e1s antiguos que forman parte de la pen\u00ednsula ib\u00e9rica.<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Geoqu\u00edmica y geocronolog\u00eda de las ofiolitas de galicia<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Geoqu\u00edmica y geocronolog\u00eda de las ofiolitas de galicia <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Sonia S\u00e1nchez Mart\u00ednez <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Complutense de Madrid<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 15\/11\/2007<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h3>Direcci\u00f3n y tribunal<\/h3>\n<ul>\n<li><strong>Director de la tesis<\/strong>\n<ul>\n<li>Jos\u00e9 Ram\u00f3n Mart\u00ednez Catal\u00e1n<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: Carlos Villaseca gonzalez <\/li>\n<li>Juan  ignacio Gil ibarguchi (vocal)<\/li>\n<li>teresa Jeffries (vocal)<\/li>\n<li>florentino D\u00edaz Garc\u00eda (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Sonia S\u00e1nchez Mart\u00ednez La cadena varisca europea, resultado del ensamblado de la \u00faltima pangea en tiempos paleoz\u00f3icos, [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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