{"id":3238,"date":"1994-01-01T00:00:00","date_gmt":"1994-01-01T00:00:00","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/1994\/01\/01\/litogeoquimica-del-cretacico-inferior-en-el-anticlinal-de-bilbao-cuenca-vasco-cantabrica\/"},"modified":"1994-01-01T00:00:00","modified_gmt":"1994-01-01T00:00:00","slug":"litogeoquimica-del-cretacico-inferior-en-el-anticlinal-de-bilbao-cuenca-vasco-cantabrica","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/ciencias-de-la-tierra-y-del-espacio\/litogeoquimica-del-cretacico-inferior-en-el-anticlinal-de-bilbao-cuenca-vasco-cantabrica\/","title":{"rendered":"Litogeoquimica del cretacico inferior en el anticlinal de bilbao (cuenca vasco-cantabrica)"},"content":{"rendered":"<h2>Tesis doctoral de <strong> I\u00f1aki Yusta Arnal <\/strong><\/h2>\n<p>Se realiza el estudio litogeoquimico de los materiales del cretacico inferior aflorantes en el anticlinal de bilbao (cuenca vasco-cantabrica, n. De espa\u00f1a) en cuatro sectores situados en vizcaya (sectores de carranza-lanestosa, arcentales-trucios y villaro-gorbea) y guipuzcoa (aitzgorri-zaraia), algunos de los cuales presentan indicios mineros -de zn, pb, fe-. Se analizan por fluorescencia de rayos x un conjunto de 21 elementos mayoritarios y traza en rocas sedimentarias \u00abwealdenses\u00bb y urgonianas no \u00abmineralizadas\u00bb (n=1293).  la caracterizacion del quimismo se aborda desde una perspectiva litologica, estableciendo los valores medios para cada tipo de roca clasificada quimicamente: calizas, lutitas, areniscas y terminos intermedios. La comparacion entre las unidades se realiza normalizando los contenidos de las medianas al valor de la mediana en la poblacion total, siempre discretizando los tipos litologicos clasificados. Para cada tipo de roca considerado existe una gran similitud quimica tanto por sectores como en la vertical. La mayoria de los elementos traza, en rocas \u00abno anomalas\u00bb, son aportados por la fraccion filosilicatada de la muestra. Las diferencias entre unidades se relacionan con mayores proporciones en estos minerales en las rocas, o bien con la existencia de \u00abanomalias metalogeneticas\u00bb.  el quimismo de los sedimentos terrigenos revela: (1) la procedencia de las series centrada en bloques continentales estables, (2) el caracter intermedio de los sedimentos arcillosos -predominantemente illiticos-, (3) las condiciones de deposito- clima humedo, probablemente tropical- y (4) la asociacion de elementos traza a las facies mas lutilicas. Las \u00abblack shales\u00bb analizadas no estan enriquecidas en metales, distinguiendose de otras facies de grano fino en el contenido mayor en pirita y m.O. Los valores medios en zn y pb en \u00ablutitas\u00bb -67 y 26 ppm y mas ricas en filosilicatos- en comparacion con los de taylor y mclennan (1985)<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Litogeoquimica del cretacico inferior en el anticlinal de bilbao (cuenca vasco-cantabrica)<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Litogeoquimica del cretacico inferior en el anticlinal de bilbao (cuenca vasco-cantabrica) <\/li>\n<li><strong>Autor:<\/strong>\u00a0 I\u00f1aki Yusta Arnal <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Pa\u00eds vasco\/euskal herriko unibertsitatea<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 01\/01\/1994<\/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> Herrero Rubio Jos\u00e9 Miguel<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: Purificacion Fenoll Hach-ali <\/li>\n<li>Paul Fortune Jean (vocal)<\/li>\n<li>Francisco Velasco Roldan (vocal)<\/li>\n<li>Agustin Martin Izard (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de I\u00f1aki Yusta Arnal Se realiza el estudio litogeoquimico de los materiales del cretacico inferior aflorantes en el [&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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