{"id":44450,"date":"2023-12-17T13:15:31","date_gmt":"2023-12-17T12:15:31","guid":{"rendered":"https:\/\/guidevulcanologicheetna.it\/?p=44450"},"modified":"2024-11-27T14:25:39","modified_gmt":"2024-11-27T13:25:39","slug":"etna-que-sont-les-anneaux-de-gaz-volcaniques","status":"publish","type":"post","link":"https:\/\/guidevulcanologicheetna.it\/fr\/etna-que-sont-les-anneaux-de-gaz-volcaniques\/","title":{"rendered":"Etna &#8211; Que sont les anneaux de gaz volcaniques?"},"content":{"rendered":"<p><img loading=\"lazy\" decoding=\"async\" class=\" wp-image-29128 aligncenter\" src=\"https:\/\/guidevulcanologicheetna.it\/wp-content\/uploads\/2017\/07\/logo-guide-copia.png\" alt=\"logo guide\" width=\"65\" height=\"65\" \/><\/p>\n<h4 style=\"text-align: center;\">Etna &#8211; Que sont les anneaux de gaz volcaniques? Et comment se forment-ils?<\/h4>\n<p>&#8211; Celles-ci sont form\u00e9es par la lib\u00e9ration de bulles de gaz plus ou moins sous pression, qui remontent au conduit qui les g\u00e9n\u00e8re. La masse gazeuse remonte \u00e0 une vitesse plus \u00e9lev\u00e9e dans la partie centrale du conduit et mineur le long des murs en raison de la frottement r\u00e9sultant du contact avec les roches. Ces conditions permettent la gen\u00e8se \u00ab\u00a0de l&rsquo;Aureola\u00a0\u00bb gr\u00e2ce \u00e0 la plus grande accumulation de gaz sur les c\u00f4t\u00e9s et moins dense et concentr\u00e9e \u00e0 l&rsquo;int\u00e9rieur. Lorsque l&rsquo;anneau sort du conduit, en fait, un mouvement centrifuge est observ\u00e9 qui garantit la forme concentrique \u00e0 l&rsquo;\u00e9mission gazeuse, refl\u00e9tant la forme du conduit qui l&rsquo;a g\u00e9n\u00e9r\u00e9e.<\/p>\n<p>&#8211; Ces ph\u00e9nom\u00e8nes sont le r\u00e9sultat de rejets de bulles de gaz (explosions) intra-cract\u00e9riques (dans le syst\u00e8me d&rsquo;alimentation volcanique) plus ou moins superficielles.<br \/>\n-La pr\u00e9sence peut indiquer une mont\u00e9e ou plut\u00f4t le stationnement \u00e0 une certaine profondeur, de la colonne magmatique dans le conduit lui-m\u00eame.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-44371 aligncenter\" src=\"https:\/\/guidevulcanologicheetna.it\/wp-content\/uploads\/2023\/11\/Anello-di-gas-dellEtna-prodotto-dalla-Bocca-Nuova.jpg\" alt=\"\" width=\"625\" height=\"469\" \/><\/p>\n<p style=\"text-align: center;\">Anneau de gaz volcanique captur\u00e9 par le bord nord-ouest du crat\u00e8re nord-est d&rsquo;Etna<\/p>\n<p>&nbsp;<\/p>\n<p>Article \u00e9crit par: Vincenzo Greco G.V.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\" wp-image-28518 aligncenter\" src=\"https:\/\/guidevulcanologicheetna.it\/wp-content\/uploads\/2017\/03\/cropped-Guide_vulcanologiche_Etna_Logo-1.png\" alt=\"\" width=\"90\" height=\"90\" srcset=\"https:\/\/guidevulcanologicheetna.it\/wp-content\/uploads\/2017\/03\/cropped-Guide_vulcanologiche_Etna_Logo-1.png 512w, https:\/\/guidevulcanologicheetna.it\/wp-content\/uploads\/2017\/03\/cropped-Guide_vulcanologiche_Etna_Logo-1-150x150.png 150w, https:\/\/guidevulcanologicheetna.it\/wp-content\/uploads\/2017\/03\/cropped-Guide_vulcanologiche_Etna_Logo-1-300x300.png 300w, https:\/\/guidevulcanologicheetna.it\/wp-content\/uploads\/2017\/03\/cropped-Guide_vulcanologiche_Etna_Logo-1-270x270.png 270w, https:\/\/guidevulcanologicheetna.it\/wp-content\/uploads\/2017\/03\/cropped-Guide_vulcanologiche_Etna_Logo-1-192x192.png 192w, https:\/\/guidevulcanologicheetna.it\/wp-content\/uploads\/2017\/03\/cropped-Guide_vulcanologiche_Etna_Logo-1-180x180.png 180w, https:\/\/guidevulcanologicheetna.it\/wp-content\/uploads\/2017\/03\/cropped-Guide_vulcanologiche_Etna_Logo-1-32x32.png 32w\" sizes=\"(max-width: 90px) 100vw, 90px\" \/><\/p>\n<p style=\"text-align: center;\"><b>\u00a9Guide Vulcanologiche Etna Nord<\/b><\/p>\n<p style=\"text-align: center;\"><a href=\"https:\/\/www.facebook.com\/guidevulcanologiche\/\">Facebook\/Instagram: Guide Vulcanologiche Etna Nord<\/a><br \/>\nEmail:<a href=\"mailto:info@guidevulcanologicheetna.it\"> info@guidevulcanologicheetna.it<\/a><\/p>\n<p style=\"text-align: center;\"><b>Nom \/ Raison sociale : Cooperativa Guide Vulcanologiche Etna Nord Soc.Coop.<\/b><\/p>\n<p style=\"text-align: center;\"><strong>PEC : <a href=\"mailto:guidevulcanologicheetna@pec.it\">guidevulcanologicheetna@pec.it<\/a><\/strong><\/p>\n<p style=\"text-align: center;\"><b>Code destinataire : T04ZHR3 (le second caract\u00e8re est un z\u00e9ro)<\/b><\/p>\n<p style=\"text-align: center;\"><b>P.IVA\/CF: IT05583690879<\/b><\/p>\n<p style=\"text-align: center;\">Si\u00e8ge social \u00e0 : Via Viola 1 &#8211; Linguaglossa (CT) CAP : 95015<\/p>\n<p style=\"text-align: center;\"><strong>Email : <a href=\"mailto:info.guidevulcanologicheetna@gmail.com\">info.guidevulcanologicheetna@gmail.com<\/a><\/strong><\/p>\n<p style=\"text-align: center;\">Tel : + 39 3455741330<\/p>\n<p><strong>\u00a9Guide Vulcanologiche Etna Nord<\/strong> &#8211; Loi 22 avril 1941, n\u00b0 633<br \/>\nProtection du droit d&rsquo;auteur et des autres droits li\u00e9s \u00e0 son exercice.<\/p>\n<p>Notre groupe est compos\u00e9 de guides appartenant au <strong>Coll\u00e8ge r\u00e9gional des guides alpins et volcanologiques de Sicile<\/strong>. La loi italienne pr\u00e9voit que ces professionnels sont les seuls habilit\u00e9s \u00e0 encadrer des groupes sur les volcans actifs et dans toute l&rsquo;\u00eele (loi-cadre du 2 janvier 1989 n\u00b0 6 et loi r\u00e9gionale du 6 avril 1996).<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Etna &#8211; Que sont les anneaux de gaz volcaniques? Et comment se forment-ils? &#8211; Celles-ci sont form\u00e9es par la lib\u00e9ration de bulles de gaz plus ou moins sous pression, qui remontent au conduit qui les g\u00e9n\u00e8re. La masse gazeuse remonte \u00e0 une vitesse plus \u00e9lev\u00e9e dans la partie centrale du conduit et mineur le long [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":44369,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[2119,1403,717],"tags":[1759,1754,860,1564,839,1981,1801,1984,1979],"class_list":["post-44450","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-fr","category-informations-generales-sur-les-volcans","category-toutes-les-nouvelles-publiees-par-les-guides-etna","tag-anneau","tag-anneau-de-gaz-volcanique","tag-bocca-nuova-fr","tag-crateres-au-sommet","tag-crateres-sommitaux","tag-crateri-etna-fr-2","tag-emission-de-gaz-volcanique","tag-etnas-craters-fr-2","tag-fr"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Etna - Que sont les anneaux de gaz volcaniques?<\/title>\n<meta name=\"description\" content=\"Etna - Que sont les anneaux de gaz volcaniques? 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