{"id":20856,"date":"2023-10-27T15:46:22","date_gmt":"2023-10-27T15:46:22","guid":{"rendered":"https:\/\/www.africa-press.net\/madagascar\/politique\/des-diamants-africains-livrent-des-secrets-sur-la-formation-des-continents"},"modified":"2023-10-27T17:34:24","modified_gmt":"2023-10-27T17:34:24","slug":"des-diamants-africains-livrent-des-secrets-sur-la-formation-des-continents","status":"publish","type":"post","link":"https:\/\/www.africa-press.net\/madagascar\/toutes-les-actualites\/des-diamants-africains-livrent-des-secrets-sur-la-formation-des-continents","title":{"rendered":"Des diamants africains livrent des secrets sur la formation des continents"},"content":{"rendered":"

Africa-Press – Madagascar. <\/strong><\/span>L\u2019analyse de diamants d\u2019Afrique et du Bre\u0301sil e\u0301claire sur la de\u0301rive des continents, a\u0300 en croire une e\u0301tude de l\u2019Universite\u0301 du Witwatersrand. Les mine\u0301raux ont en effet accompagne\u0301 les supercontinents avant l\u2019e\u0301clatement de ces derniers.<\/p>\n

La me\u0301moire de la Terre. Des diamants extre\u0302mement rares recueillis en Afrique de l\u2019Ouest et au Bre\u0301sil ont permis de retracer la de\u0301rive des continents, rapporte un communique\u0301 de l\u2019Universite\u0301 du Witwatersrand.<\/p>\n

Des scientifiques sud-africains ont en effet travaille\u0301 sur des diamants qui se sont forme\u0301s dans des couches ultra-profondes et ont de\u0301couvert un potentiel nouveau mode de de\u0301rive des continents, selon cette e\u0301tude publie\u0301e dans la revue Nature.<\/p>\n

\u201cLes diamants ultra-profonds sont extre\u0302mement rares et nous savons maintenant qu\u2019ils peuvent nous en dire beaucoup sur l\u2019ensemble du processus de formation des continents. Nous voulions dater ces diamants pour essayer de comprendre comment les premiers continents se sont forme\u0301s\u201d, explique ainsi Karen Smit, l\u2019un des auteurs de l\u2019e\u0301tude.<\/p>\n

Supercontinents<\/b><\/p>\n

Ces diamants se sont en effet forme\u0301s a\u0300 plus de 300 km de profondeur d\u2019un supercontinent, nomme\u0301 Gondwana, ance\u0302tre de l\u2019Afrique, de l\u2019Ame\u0301rique du Sud, mais aussi d\u2019une partie de l\u2019Antarctique. Les diamants ultra-profonds ont accompagne\u0301 le Gondwana. Lorsque celui-ci s\u2019est brise\u0301, ils ont e\u0301te\u0301 ramene\u0301s a\u0300 la surface de la Terre par des e\u0301ruptions volcaniques.<\/p>\n

Cette histoire complexe des diamants montre qu\u2019ils ont remarquablement voyage\u0301, a\u0300 la fois verticalement et horizontalement, a\u0300 l\u2019inte\u0301rieur de la Terre \u2013 retrac\u0327ant a\u0300 la fois la formation du supercontinent et les dernie\u0300res e\u0301tapes de son e\u0301volution\u201d, explique ainsi Karen Smit.<\/p>\n

Un nouveau laboratoire d\u2019isotopes est de\u0301sormais en de\u0301veloppement a\u0300 l\u2019Universite\u0301 du Witwatersrand, pour pouvoir mener de plus amples recherches sur les diamants en Afrique du Sud. C\u2019est la premie\u0300re fois qu\u2019une telle e\u0301tude est mene\u0301e dans le pays et non a\u0300 l\u2019e\u0301tranger, se re\u0301jouit la scientifique.<\/p>\n

L\u2019Afrique du Sud est l\u2019un des plus gros producteurs de diamants bruts au monde, seulement devance\u0301e par le Botswana et la Re\u0301publique du Congo sur le continent.<\/p>\n

Pour plus d’informations et d’analyses sur la Madagascar<\/a>, suivez Africa-Press<\/a><\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"

Africa-Press – Madagascar. L\u2019analyse de diamants d\u2019Afrique et du Bre\u0301sil e\u0301claire sur la de\u0301rive des continents, a\u0300 en croire une e\u0301tude de l\u2019Universite\u0301 du Witwatersrand. Les mine\u0301raux ont en effet accompagne\u0301 les supercontinents avant l\u2019e\u0301clatement de ces derniers. La me\u0301moire de la Terre. Des diamants extre\u0302mement rares recueillis en Afrique de l\u2019Ouest et au Bre\u0301sil […]<\/p>\n","protected":false},"author":82,"featured_media":20855,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[22,10],"tags":[36,50,49],"class_list":["post-20856","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-divers","category-toutes-les-actualites","tag-africa-press","tag-africa-press-madagascar","tag-madagascar"],"yoast_head":"\nDes diamants africains livrent des secrets sur la formation des continents - Madagascar<\/title>\n<meta name=\"description\" content=\"L\u2019analyse de diamants d\u2019Afrique et du Bre\u0301sil e\u0301claire sur la de\u0301rive des continents, a\u0300 en croire une e\u0301tude de l\u2019Unive ...\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.africa-press.net\/madagascar\/toutes-les-actualites\/des-diamants-africains-livrent-des-secrets-sur-la-formation-des-continents\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Des diamants africains livrent des secrets sur la formation des continents\" \/>\n<meta property=\"og:description\" content=\"L\u2019analyse de diamants d\u2019Afrique et du Bre\u0301sil e\u0301claire sur la de\u0301rive des continents, a\u0300 en croire une e\u0301tude de l\u2019Unive ...\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.africa-press.net\/madagascar\/toutes-les-actualites\/des-diamants-africains-livrent-des-secrets-sur-la-formation-des-continents\" \/>\n<meta property=\"og:site_name\" content=\"Madagascar\" \/>\n<meta property=\"article:published_time\" content=\"2023-10-27T15:46:22+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2023-10-27T17:34:24+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/static.africa-press.net\/madagascar\/sites\/56\/2023\/10\/sm_1698411716.711899.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1440\" \/>\n\t<meta property=\"og:image:height\" content=\"894\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"cfeditorfr\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u00c9crit par\" \/>\n\t<meta name=\"twitter:data1\" content=\"cfeditorfr\" \/>\n\t<meta name=\"twitter:label2\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.africa-press.net\/madagascar\/toutes-les-actualites\/des-diamants-africains-livrent-des-secrets-sur-la-formation-des-continents#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.africa-press.net\/madagascar\/toutes-les-actualites\/des-diamants-africains-livrent-des-secrets-sur-la-formation-des-continents\"},\"author\":{\"name\":\"cfeditorfr\",\"@id\":\"https:\/\/www.africa-press.net\/madagascar\/#\/schema\/person\/2b1cf3cd81a31e3cd26889ca66d677f1\"},\"headline\":\"Des diamants africains livrent des secrets sur la formation des continents\",\"datePublished\":\"2023-10-27T15:46:22+00:00\",\"dateModified\":\"2023-10-27T17:34:24+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.africa-press.net\/madagascar\/toutes-les-actualites\/des-diamants-africains-livrent-des-secrets-sur-la-formation-des-continents\"},\"wordCount\":411,\"commentCount\":0,\"image\":{\"@id\":\"https:\/\/www.africa-press.net\/madagascar\/toutes-les-actualites\/des-diamants-africains-livrent-des-secrets-sur-la-formation-des-continents#primaryimage\"},\"thumbnailUrl\":\"https:\/\/static.africa-press.net\/madagascar\/sites\/56\/2023\/10\/sm_1698411716.711899.jpg\",\"keywords\":[\"Africa Press\",\"Africa Press-Madagascar\",\"Madagascar\"],\"articleSection\":[\"Divers\",\"Toutes les actualit\u00e9s\"],\"inLanguage\":\"fr-FR\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/www.africa-press.net\/madagascar\/toutes-les-actualites\/des-diamants-africains-livrent-des-secrets-sur-la-formation-des-continents#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.africa-press.net\/madagascar\/toutes-les-actualites\/des-diamants-africains-livrent-des-secrets-sur-la-formation-des-continents\",\"url\":\"https:\/\/www.africa-press.net\/madagascar\/toutes-les-actualites\/des-diamants-africains-livrent-des-secrets-sur-la-formation-des-continents\",\"name\":\"Des diamants africains livrent des secrets sur la formation des continents - 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