{"id":3214,"date":"1994-01-01T00:00:00","date_gmt":"1994-01-01T00:00:00","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/1994\/01\/01\/distribucion-caracteristicas-y-petrogenesis-de-las-pegmatitas-de-la-fregeneda-salamanca\/"},"modified":"1994-01-01T00:00:00","modified_gmt":"1994-01-01T00:00:00","slug":"distribucion-caracteristicas-y-petrogenesis-de-las-pegmatitas-de-la-fregeneda-salamanca","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/ciencias-de-la-tierra-y-del-espacio\/distribucion-caracteristicas-y-petrogenesis-de-las-pegmatitas-de-la-fregeneda-salamanca\/","title":{"rendered":"Distribucion, caracteristicas y petrogenesis de las pegmatitas de la fregeneda (salamanca)"},"content":{"rendered":"<h2>Tesis doctoral de <strong> Encarnacion Roda Robles <\/strong><\/h2>\n<p>El campo pegmatitico de la fregeneda se encuentra delimitado por el granito de lumbrales al sur, y por el de saucelle al ne. Las pegmatitas encajan fundamentalmente dentro de materiales infraordovicicos del complejo esquistoso-grauvaquico (ceg), constituido en el area de estudio por una alternancia de cuarcitas, grauvacas, esquistos y pelitas. En esta zona se han distinguido los siguientes tipos de pegmatitas y cuerpos pegmatoides, que muestran diferencias mineralogicas y geoquimicas asi como en su morfolog\u00eda y estructura interna: 1) pegmatitas intragraniticas, con cuarzo, feldespato potasico, moscovita, turmalina y en ocasiones heterosita (t1); 2) diques boudinados compuestos principalmente por cuarzo y andalucita, y en menor proporcion moscovita, turmalina y feldespato potasico (t2), que afloran muy cerca del granito; 3) diques y apofisis con facies apliticas y pegmatiticas (t3), que afloran tambien cerca del contacto del granito, principalmente en el sector oriental; 4) pegmatitas simples concordantes (t4), con cuarzo, feldespato potasico, plagioclasa, moscovita y turmalina principalmente, y en menor proporcion granate, andalucita y apatito entre otros. Afloran cerca del granito, generalmente en el sector occidental; 5) pegmatitas compuestas mayoritariamente por feldespato potasico (t5); 6) pegmatitas simples discordantes (t6), formadas principalmente por cuarzo, feldespato potasico, plagioclasa y moscovita. Las mas cercanas al granito de lumbrales presentan fosfatos de fe-mn-li, mientras que las mas alejadas contienen montebrasita; 7) pegmatitas litiniferas (t7), con mica de li, ambligonita, espodumena y casiterita entre otros; 8) diques de cuarzo, con feldespatos y moscovita subordinados, y abundante casiterita (t8).  todos estos tipos pueden reagruparse por una parte en pegmatitas \u00abesteriles\u00bb, y por otra en pegmatitas \u00abevolucionadas\u00bb. Al primer grupo pertenecen los tipos (t1), (t2), (t3) y (t4). Con un mayor grado de evolu<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Distribucion, caracteristicas y petrogenesis de las pegmatitas de la fregeneda (salamanca)<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Distribucion, caracteristicas y petrogenesis de las pegmatitas de la fregeneda (salamanca) <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Encarnacion Roda Robles <\/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>Alfonso Pesquera Perez<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: Antonio Arribas Moreno <\/li>\n<li>Miguel Ortega Huertas (vocal)<\/li>\n<li>Francois Fontan (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 Encarnacion Roda Robles El campo pegmatitico de la fregeneda se encuentra delimitado por el granito de lumbrales [&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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