{"id":3282,"date":"2017-04-27T13:21:31","date_gmt":"2017-04-27T11:21:31","guid":{"rendered":"http:\/\/agora.xtec.cat\/iesm-jmzafra\/?p=3282"},"modified":"2017-04-27T13:21:31","modified_gmt":"2017-04-27T11:21:31","slug":"ofita","status":"publish","type":"post","link":"https:\/\/agora.xtec.cat\/inscaterinaalbert\/blogs\/museu-de-geologia\/ofita\/","title":{"rendered":"OFITA"},"content":{"rendered":"<table style=\"height: 375px; width: 678px; border-color: #faf5f5;\">\n<tbody>\n<tr>\n<td style=\"width: 486.4px; border-color: #fcfcfc;\"><a href=\"http:\/\/agora.xtec.cat\/iesm-jmzafra\/wp-content\/uploads\/usu164\/2017\/02\/Ofita_Bona_2A4_v2.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\" wp-image-4061 alignleft\" src=\"http:\/\/agora.xtec.cat\/iesm-jmzafra\/wp-content\/uploads\/usu164\/2017\/02\/Ofita_Bona_2A4_v2.jpg\" alt=\"ofita_bona_2a4_v2\" width=\"475\" height=\"356\" srcset=\"https:\/\/agora.xtec.cat\/inscaterinaalbert\/wp-content\/uploads\/usu164\/2017\/02\/Ofita_Bona_2A4_v2.jpg 400w, https:\/\/agora.xtec.cat\/inscaterinaalbert\/wp-content\/uploads\/usu164\/2017\/02\/Ofita_Bona_2A4_v2-300x225.jpg 300w, https:\/\/agora.xtec.cat\/inscaterinaalbert\/wp-content\/uploads\/usu164\/2017\/02\/Ofita_Bona_2A4_v2-200x150.jpg 200w\" sizes=\"auto, (max-width: 475px) 100vw, 475px\" \/><\/a><\/td>\n<td style=\"width: 184.8px; border-color: #fcfafa;\"><em>ca:<\/em>\u00a0ofita<br \/>\n<em>es<\/em>\u00a0ofita<br \/>\n<em>en<\/em>\u00a0ofita<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h6>\u00a0DESCRIPCI\u00d3<\/h6>\n<p>Les ofites s\u00f3n roques magm\u00e0tiques hipoabissals que es creu que han tingut un origen subvolc\u00e0nic, \u00e9s a dir, s&#8217;han originat quan un magma ha cristal\u00b7litzat en esquerdes i cavitats just abans d&#8217;arribar a la superf\u00edcie.<br \/>\nS\u00f3n roques de composici\u00f3 b\u00e0sica (pobre en s\u00edlice) constitu\u00efdes per petits cristalls de pirox\u00e8 i plagi\u00f2clasi. La seva textura o microestructura est\u00e0 formada per una interpenetraci\u00f3 d&#8217;aquests cristalls.<br \/>\nEs presenten en forma de petits afloraments (uns centenars de metres com a m\u00e0xim) per tot el Prepirineu central.<br \/>\nEl seu origen est\u00e0 relacionat amb la fracturaci\u00f3 i separaci\u00f3 del Pangea durant el Tri\u00e0sic, que va facilitar l&#8217;ascens de magmes b\u00e0sics procedents del mantell. En ser roques tan antigues, es conserva fonamentalment el farciment dels conductes d&#8217;ascens del magma, encara que s&#8217;han preservat algunes colades i emissions submarines.<\/p>\n<h6>OBSERVACI\u00d3 AMB LUPA<\/h6>\n<p><a href=\"http:\/\/agora.xtec.cat\/iesm-jmzafra\/wp-content\/uploads\/usu164\/2017\/02\/ofita.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-3359\" src=\"http:\/\/agora.xtec.cat\/iesm-jmzafra\/wp-content\/uploads\/usu164\/2017\/02\/ofita-768x1024.jpg\" alt=\"ofita\" width=\"186\" height=\"248\" srcset=\"https:\/\/agora.xtec.cat\/inscaterinaalbert\/wp-content\/uploads\/usu164\/2017\/02\/ofita-768x1024.jpg 768w, https:\/\/agora.xtec.cat\/inscaterinaalbert\/wp-content\/uploads\/usu164\/2017\/02\/ofita-225x300.jpg 225w\" sizes=\"auto, (max-width: 186px) 100vw, 186px\" \/><\/a>\u00a0Ofita observada amb lupa.<\/p>\n<h6>\u00c8POCA GEOL\u00d2GICA<\/h6>\n<p>El seu origen est\u00e0 relacionat amb la fracturaci\u00f3 i separaci\u00f3 del Pangea durant el Tri\u00e0sic fa uns dos-cents cicncuanta milions d\u2019anyns (MA) Anrrere. El Tri\u00e0sic \u00e9s el primer per\u00edode geol\u00f2gic del Mesozoic.Tant el principi com el seu final estan marcats per grans extincions. La que posa fi al Tri\u00e0sic ha sigut datada amb m\u00e9s precisi\u00f3.<\/p>\n<h6>\u00daS<\/h6>\n<p>Comercialment es denominen p\u00f2rfirs (\u00e9s una varietat de roca \u00edgnia composta de cristalls, com feldspat o quars, format a partir de la solidificaci\u00f3 del magma) i s&#8217;utilitzen com a \u00e0rids per a l&#8217;asfaltat de carreteres, pavimentaci\u00f3 de vies de ferrocarril, etc.<\/p>\n<h6>LLOC D\u2019ORIGEN<\/h6>\n<p>Un dels llocs on hi ha aquesta explotaci\u00f3 es a Murcia a les Mines de Abar\u00e1n.<br \/>\nAquesta comunitat sempre ha tingut molta explotaci\u00f3 minera. Abar\u00e1n \u00e9s una vila i municipi<br \/>\nde la regi\u00f3 de M\u00farcia, situada a la comarca de l&#8217;Alt Segura, encara que amb forts lligams<br \/>\nhist\u00f2rics amb la comarca de la Val de Ricote.<br \/>\n\u00c0rea: 115 km\u00b2<br \/>\nAltitud: 400 m<br \/>\nPoblaci\u00f3: 13.086<br \/>\nA part d\u2019aquesta mina te moltes d\u2019altres (no es dediquen a les ofites) com: La Sierra minera de Cartagena-La Uni\u00f3n, \u00e9s una formaci\u00f3 muntanyenca que s&#8217;est\u00e9n en direcci\u00f3 est-oest al llarg de 26 km de costa des de la ciutat de Cartagena fins Cabo de Palos. Aquesta serra va ser intensament explotada per les seves mines de plata i plom i altres minerals met\u00e0l\u00b7lics en l&#8217;antiguitat. Va comen\u00e7ar a ser explotada industrialment fins el segle XIX. Aquesta explotaci\u00f3 va acabar l\u2019any 1990 per greus problemes medioambientals.<\/p>\n<h6>MAPA<\/h6>\n<p><a href=\"http:\/\/agora.xtec.cat\/iesm-jmzafra\/wp-content\/uploads\/usu164\/2017\/02\/2017-02-20-1.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-3408\" src=\"http:\/\/agora.xtec.cat\/iesm-jmzafra\/wp-content\/uploads\/usu164\/2017\/02\/2017-02-20-1.png\" alt=\"2017-02-20-1\" width=\"297\" height=\"196\" srcset=\"https:\/\/agora.xtec.cat\/inscaterinaalbert\/wp-content\/uploads\/usu164\/2017\/02\/2017-02-20-1.png 485w, https:\/\/agora.xtec.cat\/inscaterinaalbert\/wp-content\/uploads\/usu164\/2017\/02\/2017-02-20-1-300x198.png 300w\" sizes=\"auto, (max-width: 297px) 100vw, 297px\" \/><\/a> <a href=\"http:\/\/agora.xtec.cat\/iesm-jmzafra\/wp-content\/uploads\/usu164\/2017\/02\/2017-02-20-2.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-3413\" src=\"http:\/\/agora.xtec.cat\/iesm-jmzafra\/wp-content\/uploads\/usu164\/2017\/02\/2017-02-20-2.png\" alt=\"2017-02-20-2\" width=\"249\" height=\"197\" srcset=\"https:\/\/agora.xtec.cat\/inscaterinaalbert\/wp-content\/uploads\/usu164\/2017\/02\/2017-02-20-2.png 443w, https:\/\/agora.xtec.cat\/inscaterinaalbert\/wp-content\/uploads\/usu164\/2017\/02\/2017-02-20-2-300x237.png 300w\" sizes=\"auto, (max-width: 249px) 100vw, 249px\" \/><\/a> <a href=\"http:\/\/agora.xtec.cat\/iesm-jmzafra\/wp-content\/uploads\/usu164\/2017\/02\/2017-02-20-3.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-3414\" src=\"http:\/\/agora.xtec.cat\/iesm-jmzafra\/wp-content\/uploads\/usu164\/2017\/02\/2017-02-20-3.png\" alt=\"2017-02-20-3\" width=\"249\" height=\"193\" srcset=\"https:\/\/agora.xtec.cat\/inscaterinaalbert\/wp-content\/uploads\/usu164\/2017\/02\/2017-02-20-3.png 493w, https:\/\/agora.xtec.cat\/inscaterinaalbert\/wp-content\/uploads\/usu164\/2017\/02\/2017-02-20-3-300x232.png 300w\" sizes=\"auto, (max-width: 249px) 100vw, 249px\" \/><\/a><\/p>\n<p>Espanya, Murcia- Mines d\u2019Abar\u00e0n<\/p>\n<h6>PROCED\u00c8NCIA<\/h6>\n<p>Ha arribat al institut gr\u00e0cies a la colecci\u00f3 que ens ha proporcionat l\u2019Escola Superior d\u2019Agricultura.<\/p>\n<h6>REFER\u00c8NCIES BIBLIOGR\u00c0FIQUES<\/h6>\n<p>Webs:<\/p>\n<p>22\/01\/2017<\/p>\n<p>http:\/\/www.regmurcia.com\/servlet\/s.Sl?sit=c,365,m,108&amp;r=ReP-27972-DETALLE_REPORTAJESABUELO (22\/01\/2017)<\/p>\n<p>&nbsp;<\/p>\n<p style=\"text-align: left;\">Melisa Cochior, Julie Villegas, Gerard Armentero<\/p>\n","protected":false},"excerpt":{"rendered":"<p>ca:\u00a0ofita es\u00a0ofita en\u00a0ofita \u00a0DESCRIPCI\u00d3 Les ofites s\u00f3n roques magm\u00e0tiques hipoabissals que es creu que han tingut un origen subvolc\u00e0nic, \u00e9s a dir, s&#8217;han originat quan un magma ha cristal\u00b7litzat en esquerdes i cavitats just abans d&#8217;arribar a la superf\u00edcie. S\u00f3n roques de composici\u00f3 b\u00e0sica (pobre en s\u00edlice) constitu\u00efdes per petits cristalls de pirox\u00e8 i plagi\u00f2clasi. [&hellip;]<\/p>\n","protected":false},"author":131,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_bbp_topic_count":0,"_bbp_reply_count":0,"_bbp_total_topic_count":0,"_bbp_total_reply_count":0,"_bbp_voice_count":0,"_bbp_anonymous_reply_count":0,"_bbp_topic_count_hidden":0,"_bbp_reply_count_hidden":0,"_bbp_forum_subforum_count":0,"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 center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[321],"tags":[324,322],"class_list":["post-3282","post","type-post","status-publish","format-standard","hentry","category-museu-de-geologia","tag-2a4","tag-magmatiques"],"post_mailing_queue_ids":[],"_links":{"self":[{"href":"https:\/\/agora.xtec.cat\/inscaterinaalbert\/wp-json\/wp\/v2\/posts\/3282","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/agora.xtec.cat\/inscaterinaalbert\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/agora.xtec.cat\/inscaterinaalbert\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/agora.xtec.cat\/inscaterinaalbert\/wp-json\/wp\/v2\/users\/131"}],"replies":[{"embeddable":true,"href":"https:\/\/agora.xtec.cat\/inscaterinaalbert\/wp-json\/wp\/v2\/comments?post=3282"}],"version-history":[{"count":4,"href":"https:\/\/agora.xtec.cat\/inscaterinaalbert\/wp-json\/wp\/v2\/posts\/3282\/revisions"}],"predecessor-version":[{"id":4296,"href":"https:\/\/agora.xtec.cat\/inscaterinaalbert\/wp-json\/wp\/v2\/posts\/3282\/revisions\/4296"}],"wp:attachment":[{"href":"https:\/\/agora.xtec.cat\/inscaterinaalbert\/wp-json\/wp\/v2\/media?parent=3282"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/agora.xtec.cat\/inscaterinaalbert\/wp-json\/wp\/v2\/categories?post=3282"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/agora.xtec.cat\/inscaterinaalbert\/wp-json\/wp\/v2\/tags?post=3282"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}