{"id":453,"date":"2014-11-29T12:17:54","date_gmt":"2014-11-29T12:17:54","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/bardintzeff\/?p=453"},"modified":"2020-01-30T18:56:18","modified_gmt":"2020-01-30T18:56:18","slug":"marcher-fond-oceanique-oman","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/bardintzeff\/2014\/11\/29\/marcher-fond-oceanique-oman\/","title":{"rendered":"Marcher sur un fond oc\u00e9anique \u00e0 Oman"},"content":{"rendered":"

Oman est un haut lieu de la g\u00e9ologie<\/strong> car il est possible de marcher \u00ab\u00a0\u00e0 pieds secs\u00a0\u00bb (ou presque\u00a0!) sur un fond oc\u00e9anique\u2026 vieux d\u2019environ 100 millions d\u2019ann\u00e9es.<\/p>\n

En effet, la \u00ab\u00a0Nappe de Semail\u00a0\u00bb, longue de 500 km et large de 50 \u00e0 100 km, est un fragment de lithosph\u00e8re oc\u00e9anique transport\u00e9e (on dit \u00ab\u00a0obduct\u00e9e\u00a0\u00bb) sur le continent lors du rapprochement de l\u2019Iran et de l\u2019Arabie au Cr\u00e9tac\u00e9 sup\u00e9rieur.<\/p>\n

Dans le Wadi (oued) Jizi, on trouve des roches vraiment \u00e9tonnantes\u2026<\/p>\n

\"Bardintzeff.Oman.9035\"<\/a><\/p>\n

Laves basaltiques en \u00ab\u00a0oreillers\u00a0\u00bb (\u00ab\u00a0pillow lavas\u00a0\u00bb) dans le Wadi Jizi, t\u00e9moin d\u2019une ancienne cro\u00fbte oc\u00e9anique, appel\u00e9e \u00ab\u00a0ophiolite\u00a0\u00bb (\u00a9 J.M. Bardintzeff).<\/p>\n

\"Bardintzeff.Oman.8981\"<\/a><\/p>\n

J.M. Bardintzeff observe des basaltes en \u00ab\u00a0oreillers\u00a0\u00bb (\u00ab\u00a0pillow lavas\u00a0\u00bb) dans le Wadi Jizi (\u00a9 J.M. Bardintzeff).<\/p>\n

<\/p>\n

Non loin de l\u00e0, dans le Wadi Sahali, la colline de Zuha, r\u00e9sulte de l\u2019accumulation de sulfures par des fumerolles sous-marines \u00e0 400 degr\u00e9s\u00a0: c\u2019est un \u00ab\u00a0fumeur noir\u00a0\u00bb comme on en observe aujourd\u2019hui au niveau des dorsales m\u00e9dio-oc\u00e9aniques.<\/p>\n

\"Bardintzeff.Oman.9100.Zuha\"<\/a><\/p>\n

\u00ab\u00a0En rouge et noir\u00a0\u00bb\u00a0: le \u00ab\u00a0fumeur fossile\u00a0\u00bb de Zuha (\u00a9 J.M. Bardintzeff).<\/p>\n

 <\/p>\n

\"Bardintzeff.Oman.9084.Zuha\"<\/a><\/p>\n

Un dromadaire g\u00e9ologue, vivement int\u00e9ress\u00e9 par le fumeur noir de Zoha (\u00a9 J.M. Bardintzeff).<\/p>\n

On appelle ces ensembles de roches sous-marines des \u00ab\u00a0ophiolites\u00a0\u00bb. On en conna\u00eet aussi \u00e0 Chypre (voir mon article du 7 f\u00e9vrier 2014 dans ce blog) et dans les Alpes.<\/p>\n","protected":false},"excerpt":{"rendered":"

Oman est un haut lieu de la g\u00e9ologie car il est possible de marcher \u00ab\u00a0\u00e0 pieds secs\u00a0\u00bb (ou presque\u00a0!) sur un fond oc\u00e9anique\u2026 vieux d\u2019environ 100 millions d\u2019ann\u00e9es. En effet, la \u00ab\u00a0Nappe de Semail\u00a0\u00bb, longue de 500 km et large de 50 \u00e0 100 km, est un fragment de lithosph\u00e8re oc\u00e9anique transport\u00e9e (on dit \u00ab\u00a0obduct\u00e9e\u00a0\u00bb) … Continuer la lecture de Marcher sur un fond oc\u00e9anique \u00e0 Oman<\/span> →<\/span><\/a><\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[8],"tags":[1308,113,32,112,31,33],"class_list":["post-453","post","type-post","status-publish","format-standard","hentry","category-voyages","tag-dromadaire","tag-fumeur-noir","tag-lave-sous-marine","tag-oman","tag-ophiolite","tag-pillow-lava"],"yoast_head":"\nMarcher sur un fond oc\u00e9anique \u00e0 Oman, par Jacques-Marie Bardintzeff<\/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:\/\/blogs.futura-sciences.com\/bardintzeff\/2014\/11\/29\/marcher-fond-oceanique-oman\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Marcher sur un fond oc\u00e9anique \u00e0 Oman, par Jacques-Marie Bardintzeff\" \/>\n<meta property=\"og:description\" content=\"Oman est un haut lieu de la g\u00e9ologie car il est possible de marcher \u00ab\u00a0\u00e0 pieds secs\u00a0\u00bb (ou presque\u00a0!) sur un fond oc\u00e9anique\u2026 vieux d\u2019environ 100 millions d\u2019ann\u00e9es. En effet, la \u00ab\u00a0Nappe de Semail\u00a0\u00bb, longue de 500 km et large de 50 \u00e0 100 km, est un fragment de lithosph\u00e8re oc\u00e9anique transport\u00e9e (on dit \u00ab\u00a0obduct\u00e9e\u00a0\u00bb) … Continuer la lecture de Marcher sur un fond oc\u00e9anique \u00e0 Oman →\" \/>\n<meta property=\"og:url\" content=\"https:\/\/blogs.futura-sciences.com\/bardintzeff\/2014\/11\/29\/marcher-fond-oceanique-oman\/\" \/>\n<meta property=\"og:site_name\" content=\"VOLCANMANIA : le blog de Jacques-Marie BARDINTZEFF, volcanologue\" \/>\n<meta property=\"article:published_time\" content=\"2014-11-29T12:17:54+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2020-01-30T18:56:18+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/blogs.futura-sciences.com\/bardintzeff\/wp-content\/uploads\/sites\/3\/2014\/11\/Bardintzeff.Oman_.9035-450x337.jpg\" \/>\n<meta name=\"author\" content=\"jmbardintzeff\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u00c9crit par\" \/>\n\t<meta name=\"twitter:data1\" content=\"jmbardintzeff\" \/>\n\t<meta name=\"twitter:label2\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/blogs.futura-sciences.com\/bardintzeff\/2014\/11\/29\/marcher-fond-oceanique-oman\/\",\"url\":\"https:\/\/blogs.futura-sciences.com\/bardintzeff\/2014\/11\/29\/marcher-fond-oceanique-oman\/\",\"name\":\"Marcher sur un fond oc\u00e9anique \u00e0 Oman, par Jacques-Marie Bardintzeff\",\"isPartOf\":{\"@id\":\"https:\/\/blogs.futura-sciences.com\/bardintzeff\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/blogs.futura-sciences.com\/bardintzeff\/2014\/11\/29\/marcher-fond-oceanique-oman\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/blogs.futura-sciences.com\/bardintzeff\/2014\/11\/29\/marcher-fond-oceanique-oman\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/blogs.futura-sciences.com\/bardintzeff\/wp-content\/uploads\/sites\/3\/2014\/11\/Bardintzeff.Oman_.9035-450x337.jpg\",\"datePublished\":\"2014-11-29T12:17:54+00:00\",\"dateModified\":\"2020-01-30T18:56:18+00:00\",\"author\":{\"@id\":\"https:\/\/blogs.futura-sciences.com\/bardintzeff\/#\/schema\/person\/974e1e0324e3e06f08253784e8eca61e\"},\"inLanguage\":\"fr-FR\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/blogs.futura-sciences.com\/bardintzeff\/2014\/11\/29\/marcher-fond-oceanique-oman\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"fr-FR\",\"@id\":\"https:\/\/blogs.futura-sciences.com\/bardintzeff\/2014\/11\/29\/marcher-fond-oceanique-oman\/#primaryimage\",\"url\":\"https:\/\/blogs.futura-sciences.com\/bardintzeff\/wp-content\/uploads\/sites\/3\/2014\/11\/Bardintzeff.Oman_.9035.jpg\",\"contentUrl\":\"https:\/\/blogs.futura-sciences.com\/bardintzeff\/wp-content\/uploads\/sites\/3\/2014\/11\/Bardintzeff.Oman_.9035.jpg\",\"width\":1134,\"height\":850},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/blogs.futura-sciences.com\/bardintzeff\/#website\",\"url\":\"https:\/\/blogs.futura-sciences.com\/bardintzeff\/\",\"name\":\"VOLCANMANIA : le blog de Jacques-Marie BARDINTZEFF, volcanologue\",\"description\":\"Les volcans ? 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