{"id":5194178,"date":"2011-12-26T20:37:25","date_gmt":"2011-12-26T18:37:25","guid":{"rendered":"https:\/\/www.ozono21.com\/blog\/?p=5194178"},"modified":"2026-02-18T19:11:39","modified_gmt":"2026-02-18T17:11:39","slug":"oro-cosmico","status":"publish","type":"post","link":"https:\/\/www.ozono21.com\/blog\/medioambiente\/oro-cosmico\/","title":{"rendered":"\u00bf Oro c\u00f3smico ?"},"content":{"rendered":"<p style=\"text-align: justify;\">\n<h2 style=\"text-align: justify;\"><strong><img loading=\"lazy\" decoding=\"async\" class=\"alignleft size-medium wp-image-5194179\" style=\"margin: 50px 5px 50px 0px; cursor: hand; border: 0px;\" title=\" Oro Cosmico\" src=\"https:\/\/www.ozono21.com\/blog\/wp-content\/uploads\/2011\/12\/oro-cosmico-300x248.jpg\" alt=\" oro \" width=\"300\" height=\"202\" \/><a title=\"Ozono21\" href=\"https:\/\/www.ozono21.com\/\" target=\"_blank\" rel=\"noopener noreferrer\">Metales preciosos en el manto de la Tierra tienen origen de una lluvia de meteoritos hace 3.900 millones de a\u00f1os. Investigadores describen diferencias en la composici\u00f3n del manto terrestre antes y despu\u00e9s de este suceso.<\/a><\/strong><\/h2>\n<p><\/P><\/p>\n<p style=\"text-align: justify;\">Un 0,5% del manto terrestre proviene de una lluvia de meteoritos, estudio que muestra con alta precisi\u00f3n <strong>c\u00f3mo se incorporaron metales preciosos, como el oro o la plata, en la composici\u00f3n de las capas m\u00e1s externas de la Tierra.<\/strong><\/p>\n<p>Noticiasdelaciencia (8 Sep. 2011)<\/p>\n<p style=\"text-align: justify;\">\u201cEl uso de relaciones isot\u00f3picas en la investigaci\u00f3n nos da estimaciones mucho m\u00e1s exactas, y supone el principal avance de nuestro trabajo\u201d, explica a SINC Matthias Willbold de la Universidad de Bristol (Reino Unido) y uno de los autores del art\u00edculo.<\/p>\n<p style=\"text-align: justify;\"><strong>Hace 4.500 millones de a\u00f1os la Tierra, en sus primeras etapas de formaci\u00f3n, era un oc\u00e9ano de magma. Los metales fundidos se hundieron y crearon el n\u00facleo, dejando el manto desprovisto de este tipo de materiales. Pese a ello, todav\u00eda se observan metales nobles cerca de la superficie. Una de las teor\u00edas que explican este fen\u00f3meno lo atribuye a una lluvia de meteoritos hace 3.900 millones de a\u00f1os \u2013es decir, 650 millones de a\u00f1os despu\u00e9s de la formaci\u00f3n del sistema solar\u2013, que tambi\u00e9n cre\u00f3 muchos de los cr\u00e1teres lunares.<\/strong><\/p>\n<p style=\"text-align: justify;\">Probar esta hip\u00f3tesis ha sido muy complicado debido a la falta de exactitud en las mediciones de metales preciosos. \u201cNosotros evaluamos relaciones de un is\u00f3topo del tungsteno. Es un elemento que tiene un comportamiento similar a los metales preciosos; por ejemplo, desaparece hacia dentro del n\u00facleo terrestre\u201d, explica Willbold.<\/p>\n<p style=\"text-align: justify;\">Adem\u00e1s, la composici\u00f3n isot\u00f3pica del tungsteno en la Tierra es muy diferente a la del material mete\u00f3rico, lo que permite usar estos is\u00f3topos para marcar la materia procedente de asteroides.<\/p>\n<p style=\"text-align: justify;\">El equipo de Willbold constat\u00f3 que la abundancia de este is\u00f3topo en la superficie actual de la Tierra era pr\u00e1cticamente homog\u00e9nea. Sin embargo, detectaron determinadas rocas en el cintur\u00f3n supra cortical de Isua (Groenlandia) con mayor presencia del is\u00f3topo. Estas formaciones son muy antiguas, y muestran c\u00f3mo era la Tierra antes de la lluvia de meteoritos (es decir, cuando el manto estaba desprovisto de metales nobles).<\/p>\n<p style=\"text-align: justify;\">\u201cSe observa un descenso de la relaci\u00f3n del tungsteno, y la medida actual solo puede explicarse si aproximadamente el 0,5% del manto terrestre proviene de material mete\u00f3rico, que contrarrestara el valor tras la lluvia de meteoritos\u201d, asegura Willbold. Esta estimaci\u00f3n supone que el manto del planeta contiene 20 trillones de toneladas de materia extraterrestre.<\/p>\n<p style=\"text-align: justify;\"><strong>Estos descubrimientos apoyan la posibilidad de que los meteoritos fueran la fuente de estos metales, entre los que se encuentran el oro, la plata, el platino o el rodio, tras la formaci\u00f3n del n\u00facleo. Los autores sugieren que, incluso, esta lluvia de meteoritos pudo originar la actual din\u00e1mica del manto. (Fuente: SINC)<\/strong><\/p>\n<table border=\"3\" cellspacing=\"0\" cellpadding=\"0\">\n<tbody>\n<tr>\n<td bgcolor=\"#3b7cff\" height=\"25\" width=\"600\" align=\"center\"><strong><a title=\"Acci&oacute;n del OZONO\" target=\"_blank\" href=\"https:\/\/www.ozono21.com\/actualidad-interna\/accion-del-ozono\/423\/\" rel=\"noopener noreferrer\"><img loading=\"lazy\" decoding=\"async\" border=\"0\" alt=\"Noticias Relacionadas\" width=\"600\" height=\"25\" src=\"https:\/\/www.ozono21.com\/blog\/wp-content\/uploads\/2014\/06\/Noticias-Relacionadas.png\" \/><\/a><\/strong><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><big><\/p>\n<ul>\n<li><strong><a title=\"Post sobre el ORO\" href=\"https:\/\/www.ozono21.com\/blog\/bacterias\/identifican-la-presencia-de-bacterias-de-la-caries-en-bebes-sin-dientes\/\" target=\"_blank\" rel=\"noopener noreferrer\">Post sobre el ORO<\/a><\/strong><\/li>\n<\/ul>\n<p><\/big><\/p>\n<table border=\"3\" cellspacing=\"0\" cellpadding=\"0\">\n<tbody>\n<tr>\n<td bgcolor=\"#3b7cff\" height=\"25\" width=\"600\" align=\"center\"><strong><a title=\"Videos YouTube\" target=\"_blank\" href=\"https:\/\/www.youtube.com\/user\/ozono21\/videos?sort=p&amp;view=0&amp;flow=grid\" rel=\"noopener noreferrer\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.ozono21.com\/blog\/wp-content\/uploads\/2014\/06\/Videos-Youtube.png\" alt=\"Videos Youtube\" width=\"600\" height=\"25\" border=\"0\" \/><\/a><\/strong>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>&nbsp;<\/p>\n<p style=\"TEXT-ALIGN: center\"><iframe loading=\"lazy\" width=\"718\" height=\"480\" src=\"https:\/\/www.youtube.com\/embed\/hpDwbvEoE2M\" frameborder=\"0\" allow=\"accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen><\/iframe><\/p>\n<div class=\"pvc_clear\"><\/div>\n<p id=\"pvc_stats_5194178\" class=\"pvc_stats total_only  \" data-element-id=\"5194178\" style=\"\"><i class=\"pvc-stats-icon small\" aria-hidden=\"true\"><svg aria-hidden=\"true\" focusable=\"false\" data-prefix=\"far\" data-icon=\"chart-bar\" role=\"img\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 512 512\" class=\"svg-inline--fa fa-chart-bar fa-w-16 fa-2x\"><path fill=\"currentColor\" d=\"M396.8 352h22.4c6.4 0 12.8-6.4 12.8-12.8V108.8c0-6.4-6.4-12.8-12.8-12.8h-22.4c-6.4 0-12.8 6.4-12.8 12.8v230.4c0 6.4 6.4 12.8 12.8 12.8zm-192 0h22.4c6.4 0 12.8-6.4 12.8-12.8V140.8c0-6.4-6.4-12.8-12.8-12.8h-22.4c-6.4 0-12.8 6.4-12.8 12.8v198.4c0 6.4 6.4 12.8 12.8 12.8zm96 0h22.4c6.4 0 12.8-6.4 12.8-12.8V204.8c0-6.4-6.4-12.8-12.8-12.8h-22.4c-6.4 0-12.8 6.4-12.8 12.8v134.4c0 6.4 6.4 12.8 12.8 12.8zM496 400H48V80c0-8.84-7.16-16-16-16H16C7.16 64 0 71.16 0 80v336c0 17.67 14.33 32 32 32h464c8.84 0 16-7.16 16-16v-16c0-8.84-7.16-16-16-16zm-387.2-48h22.4c6.4 0 12.8-6.4 12.8-12.8v-70.4c0-6.4-6.4-12.8-12.8-12.8h-22.4c-6.4 0-12.8 6.4-12.8 12.8v70.4c0 6.4 6.4 12.8 12.8 12.8z\" class=\"\"><\/path><\/svg><\/i> <img loading=\"lazy\" decoding=\"async\" width=\"16\" height=\"16\" alt=\"Loading\" src=\"https:\/\/www.ozono21.com\/blog\/wp-content\/plugins\/page-views-count\/ajax-loader-2x.gif\" border=0 \/><\/p>\n<div class=\"pvc_clear\"><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Metales preciosos en el manto de la Tierra tienen origen de una lluvia de meteoritos hace 3.900 millones de a\u00f1os. Investigadores describen diferencias en la composici\u00f3n del manto terrestre antes y despu\u00e9s de este suceso. Un 0,5% del manto terrestre &hellip; <a href=\"https:\/\/www.ozono21.com\/blog\/medioambiente\/oro-cosmico\/\">Sigue leyendo <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n<div class=\"pvc_clear\"><\/div>\n<p id=\"pvc_stats_5194178\" class=\"pvc_stats total_only  \" data-element-id=\"5194178\" style=\"\"><i class=\"pvc-stats-icon small\" aria-hidden=\"true\"><svg aria-hidden=\"true\" focusable=\"false\" data-prefix=\"far\" data-icon=\"chart-bar\" role=\"img\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 512 512\" class=\"svg-inline--fa fa-chart-bar fa-w-16 fa-2x\"><path fill=\"currentColor\" d=\"M396.8 352h22.4c6.4 0 12.8-6.4 12.8-12.8V108.8c0-6.4-6.4-12.8-12.8-12.8h-22.4c-6.4 0-12.8 6.4-12.8 12.8v230.4c0 6.4 6.4 12.8 12.8 12.8zm-192 0h22.4c6.4 0 12.8-6.4 12.8-12.8V140.8c0-6.4-6.4-12.8-12.8-12.8h-22.4c-6.4 0-12.8 6.4-12.8 12.8v198.4c0 6.4 6.4 12.8 12.8 12.8zm96 0h22.4c6.4 0 12.8-6.4 12.8-12.8V204.8c0-6.4-6.4-12.8-12.8-12.8h-22.4c-6.4 0-12.8 6.4-12.8 12.8v134.4c0 6.4 6.4 12.8 12.8 12.8zM496 400H48V80c0-8.84-7.16-16-16-16H16C7.16 64 0 71.16 0 80v336c0 17.67 14.33 32 32 32h464c8.84 0 16-7.16 16-16v-16c0-8.84-7.16-16-16-16zm-387.2-48h22.4c6.4 0 12.8-6.4 12.8-12.8v-70.4c0-6.4-6.4-12.8-12.8-12.8h-22.4c-6.4 0-12.8 6.4-12.8 12.8v70.4c0 6.4 6.4 12.8 12.8 12.8z\" class=\"\"><\/path><\/svg><\/i> <img loading=\"lazy\" decoding=\"async\" width=\"16\" height=\"16\" alt=\"Loading\" src=\"https:\/\/www.ozono21.com\/blog\/wp-content\/plugins\/page-views-count\/ajax-loader-2x.gif\" border=0 \/><\/p>\n<div 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