{"id":4267,"date":"2017-07-01T12:32:36","date_gmt":"2017-07-01T11:32:36","guid":{"rendered":"http:\/\/mag.abracadaroom.com\/fr\/?p=4267"},"modified":"2017-07-01T12:33:30","modified_gmt":"2017-07-01T11:33:30","slug":"naica-aux-cristaux-geants","status":"publish","type":"post","link":"https:\/\/mag.abracadaroom.com\/fr\/naica-aux-cristaux-geants\/","title":{"rendered":"Na\u00efca : la mine aux cristaux g\u00e9ants"},"content":{"rendered":"<p style=\"text-align: justify\">Un certain 4 d\u00e9cembre 1999 dans le <strong>d\u00e9sert de Chihuahua<\/strong>, alors qu\u2019ils creusaient un nouveau tunnel d\u2019a\u00e9ration, deux fr\u00e8res firent par hasard \u00a0une sacr\u00e9e d\u00e9couverte: la <strong>grotte de Na\u00efca<\/strong>. Une cave avec les cristaux les plus gigantesques jamais enregistr\u00e9s sur terre\u2026<\/p>\n<h2>La grotte en quelques chiffres<\/h2>\n<ul style=\"text-align: justify\">\n<li>Malgr\u00e9 ce que l\u2019on pourrait croire, les cristaux sont plut\u00f4t \u00ab\u00a0r\u00e9cents\u00a0\u00bb (g\u00e9ologiquement parlant bien entendu)\u00a0: ils se sont form\u00e9s il y a \u00e0 peine 500\u00a0000 ans.<\/li>\n<li>A l\u2019int\u00e9rieur de la grotte les <strong>conditions sont extr\u00eames<\/strong>\u00a0: 44\u00b0C et 100 % d\u2019humidit\u00e9 qui double la temp\u00e9rature ressentie. Sans \u00e9quipement un homme ne peut y tenir plus de 10 minutes. Attention, m\u00eame avec un \u00e9quipement sp\u00e9cifique la visite ne dure pas plus de 20\/30min.<\/li>\n<li>La grotte se situe \u00e0 290m sous la surface de la terre\u2026<\/li>\n<li>Les cristaux de s\u00e9l\u00e9nite pr\u00e9sents dans la caverne principale de Na\u00efca atteignent les <strong>11 m\u00e8tres de longueur<\/strong> pour un <strong>diam\u00e8tre de pr\u00e8s de 2 m\u00e8tres<\/strong> et d\u2019un poids pouvant avoisiner les<strong> 50 tonnes<\/strong> (oui, oui autant qu\u2019un cachalot\u00a0!).<\/li>\n<\/ul>\n<figure id=\"attachment_4268\" aria-describedby=\"caption-attachment-4268\" style=\"width: 783px\" class=\"wp-caption aligncenter\"><a href=\"http:\/\/mag.abracadaroom.com\/fr\/wp-content\/uploads\/2017\/07\/6465935297_1961887281_o.jpg\"><img decoding=\"async\" loading=\"lazy\" class=\"size-full wp-image-4268\" src=\"http:\/\/mag.abracadaroom.com\/fr\/wp-content\/uploads\/2017\/07\/6465935297_1961887281_o.jpg\" alt=\"\" width=\"783\" height=\"588\" srcset=\"https:\/\/mag.abracadaroom.com\/fr\/wp-content\/uploads\/2017\/07\/6465935297_1961887281_o.jpg 783w, https:\/\/mag.abracadaroom.com\/fr\/wp-content\/uploads\/2017\/07\/6465935297_1961887281_o-324x243.jpg 324w, https:\/\/mag.abracadaroom.com\/fr\/wp-content\/uploads\/2017\/07\/6465935297_1961887281_o-80x60.jpg 80w, https:\/\/mag.abracadaroom.com\/fr\/wp-content\/uploads\/2017\/07\/6465935297_1961887281_o-265x198.jpg 265w, https:\/\/mag.abracadaroom.com\/fr\/wp-content\/uploads\/2017\/07\/6465935297_1961887281_o-696x523.jpg 696w, https:\/\/mag.abracadaroom.com\/fr\/wp-content\/uploads\/2017\/07\/6465935297_1961887281_o-559x420.jpg 559w, https:\/\/mag.abracadaroom.com\/fr\/wp-content\/uploads\/2017\/07\/6465935297_1961887281_o-768x577.jpg 768w, https:\/\/mag.abracadaroom.com\/fr\/wp-content\/uploads\/2017\/07\/6465935297_1961887281_o-300x225.jpg 300w\" sizes=\"(max-width: 783px) 100vw, 783px\" \/><\/a><figcaption id=\"caption-attachment-4268\" class=\"wp-caption-text\">Photo credit: OggiScienza via Foter.com \/ CC BY-ND<\/figcaption><\/figure>\n<h2>Comment se sont form\u00e9s ces gigantesques cristaux\u00a0?<\/h2>\n<p style=\"text-align: justify\">Nous allons essayer de faire simple\u00a0! Tout d\u2019abord il faut savoir que la mine de Na\u00efca est situ\u00e9e sur une ancienne faille\u00a0et qu\u2019une chambre de magma chauffe \u00e9norm\u00e9ment la grotte\u2026 Ces conditions extr\u00eames ont satur\u00e9 en \u00e9l\u00e9ments chimiques (comme le calcium et le soufre) les eaux de la grotte rendant propice la croissance de ces immenses min\u00e9raux. Ensuite lorsque la mine f\u00fbt creus\u00e9e il a fallu pomper et \u00e9vacuer ces eaux. C\u2019est ainsi que les cristaux de la grotte, auparavant sous l\u2019eau, sont apparus\u00a0! Mais ce spectacle est \u00e9ph\u00e9m\u00e8re\u2026 En effet, lorsque l\u2019exploitation mini\u00e8re sera termin\u00e9e la grotte se remplira \u00e0 nouveau d\u2019eau et la nature reprendra ses droits. Les scientifiques, qui la surnomment <strong>\u00ab\u00a0la Chapelle Sixtine des cristaux\u00a0\u00bb<\/strong>, n\u2019ont donc que quelques ann\u00e9es pour recenser un maximum d\u2019informations sur cette <strong>grotte hors du commun. <\/strong><\/p>\n<figure id=\"attachment_4270\" aria-describedby=\"caption-attachment-4270\" style=\"width: 240px\" class=\"wp-caption aligncenter\"><a href=\"http:\/\/mag.abracadaroom.com\/fr\/wp-content\/uploads\/2017\/07\/18133795349_0a67d181a2_m.jpg\"><img decoding=\"async\" loading=\"lazy\" class=\"wp-image-4270 size-full\" src=\"http:\/\/mag.abracadaroom.com\/fr\/wp-content\/uploads\/2017\/07\/18133795349_0a67d181a2_m.jpg\" alt=\"\" width=\"240\" height=\"210\" \/><\/a><figcaption id=\"caption-attachment-4270\" class=\"wp-caption-text\">Photo credit: James St. John via Foter.com \/ CC BY<\/figcaption><\/figure>\n<h2>La caverne aux \u00e9p\u00e9es\u00a0: la grotte accessible \u00e0 tous<\/h2>\n<p style=\"text-align: justify\">Vous l\u2019aurez compris, l\u2019acc\u00e8s \u00e0 la grotte Na\u00efca est tr\u00e8s compliqu\u00e9\u00a0et plut\u00f4t r\u00e9serv\u00e9 aux\u00a0chercheurs: il faudra rev\u00eatir plusieurs combinaisons qui r\u00e9sistent \u00e0 la chaleur (dont une qui contient des tubes remplis d\u2019eau gel\u00e9e), mettre un masque \u00e0 gaz reli\u00e9 \u00e0 un tr\u00e8s gros sac \u00e0 dos\u2026 Mais ne soyez pas d\u00e9\u00e7us, d\u2019autres cavernes plus accessibles \u00e0 tous ont \u00e9t\u00e9 d\u00e9couvertes comme la <strong>Caverne des \u00e9p\u00e9es<\/strong>. Les chiffres sont moins impressionnants mais le d\u00e9cor est tout aussi fabuleux\u00a0: \u00e0 120 m en dessous de la surface de la terre vous d\u00e9couvrirez des cristaux d\u20191 m de long\u00a0!<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Un certain 4 d\u00e9cembre 1999 dans le d\u00e9sert de Chihuahua, alors qu\u2019ils creusaient un nouveau tunnel d\u2019a\u00e9ration, deux fr\u00e8res firent par hasard \u00a0une sacr\u00e9e d\u00e9couverte: la grotte de Na\u00efca. Une cave avec les cristaux les plus gigantesques jamais enregistr\u00e9s sur terre\u2026 La grotte en quelques chiffres Malgr\u00e9 ce que l\u2019on pourrait croire, les cristaux sont [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":4269,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_uf_show_specific_survey":0,"_uf_disable_surveys":false,"footnotes":""},"categories":[1],"tags":[474,475,458,476],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.8 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Na\u00efca : la mine aux cristaux g\u00e9ants<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/mag.abracadaroom.com\/fr\/naica-aux-cristaux-geants\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Na\u00efca : la mine aux cristaux g\u00e9ants\" \/>\n<meta property=\"og:description\" content=\"Un certain 4 d\u00e9cembre 1999 dans le d\u00e9sert de Chihuahua, alors qu\u2019ils creusaient un nouveau tunnel d\u2019a\u00e9ration, deux fr\u00e8res firent par hasard \u00a0une sacr\u00e9e d\u00e9couverte: la grotte de Na\u00efca. Une cave avec les cristaux les plus gigantesques jamais enregistr\u00e9s sur terre\u2026 La grotte en quelques chiffres Malgr\u00e9 ce que l\u2019on pourrait croire, les cristaux sont [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/mag.abracadaroom.com\/fr\/naica-aux-cristaux-geants\/\" \/>\n<meta property=\"og:site_name\" content=\"Le blog du tourisme insolite\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/abracadaroom\" \/>\n<meta property=\"article:published_time\" content=\"2017-07-01T11:32:36+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2017-07-01T11:33:30+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/mag.abracadaroom.com\/fr\/wp-content\/uploads\/2017\/07\/6465934885_35e4e3898d_b.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1024\" \/>\n\t<meta property=\"og:image:height\" content=\"680\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Lydie Coste\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@abracadaroom\" \/>\n<meta name=\"twitter:site\" content=\"@abracadaroom\" \/>\n<meta name=\"twitter:label1\" content=\"\u00c9crit par\" \/>\n\t<meta name=\"twitter:data1\" content=\"Lydie Coste\" \/>\n\t<meta name=\"twitter:label2\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/mag.abracadaroom.com\/fr\/naica-aux-cristaux-geants\/\",\"url\":\"https:\/\/mag.abracadaroom.com\/fr\/naica-aux-cristaux-geants\/\",\"name\":\"Na\u00efca : la mine aux cristaux g\u00e9ants\",\"isPartOf\":{\"@id\":\"https:\/\/mag.abracadaroom.com\/fr\/#website\"},\"datePublished\":\"2017-07-01T11:32:36+00:00\",\"dateModified\":\"2017-07-01T11:33:30+00:00\",\"author\":{\"@id\":\"https:\/\/mag.abracadaroom.com\/fr\/#\/schema\/person\/75ce15ddf80df3a5cb1935c20fe1f592\"},\"breadcrumb\":{\"@id\":\"https:\/\/mag.abracadaroom.com\/fr\/naica-aux-cristaux-geants\/#breadcrumb\"},\"inLanguage\":\"fr-FR\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/mag.abracadaroom.com\/fr\/naica-aux-cristaux-geants\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/mag.abracadaroom.com\/fr\/naica-aux-cristaux-geants\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/mag.abracadaroom.com\/fr\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Na\u00efca : la mine aux cristaux g\u00e9ants\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/mag.abracadaroom.com\/fr\/#website\",\"url\":\"https:\/\/mag.abracadaroom.com\/fr\/\",\"name\":\"Le blog du tourisme insolite\",\"description\":\"\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/mag.abracadaroom.com\/fr\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"fr-FR\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/mag.abracadaroom.com\/fr\/#\/schema\/person\/75ce15ddf80df3a5cb1935c20fe1f592\",\"name\":\"Lydie Coste\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"fr-FR\",\"@id\":\"https:\/\/mag.abracadaroom.com\/fr\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/4e9917e75d82f9408d38fa049d4f4b33?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/4e9917e75d82f9408d38fa049d4f4b33?s=96&d=mm&r=g\",\"caption\":\"Lydie Coste\"},\"description\":\"Passionn\u00e9e par les voyages, je me suis naturellement dirig\u00e9e apr\u00e8s le bac vers des \u00e9tudes de g\u00e9ographie et de tourisme. 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