{"id":8333,"date":"2015-10-13T00:00:10","date_gmt":"2015-10-12T22:00:10","guid":{"rendered":"http:\/\/www.laterredufutur.com\/accueil\/?p=8333"},"modified":"2015-10-01T17:37:04","modified_gmt":"2015-10-01T15:37:04","slug":"une-enigme-autour-de-la-formation-de-la-terre-enfin-resolue","status":"publish","type":"post","link":"https:\/\/www.laterredufutur.com\/accueil\/une-enigme-autour-de-la-formation-de-la-terre-enfin-resolue\/","title":{"rendered":"Une \u00e9nigme autour de la formation de la Terre enfin r\u00e9solue?"},"content":{"rendered":"<div class=\"1665f18d14f35dd9e7566e1a8ac9a3e9\" data-index=\"1\" style=\"float: none; margin:10px 0 10px 0; text-align:center;\">\n<script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js\"><\/script>\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:block; text-align:center;\"\r\n     data-ad-layout=\"in-article\"\r\n     data-ad-format=\"fluid\"\r\n     data-ad-client=\"ca-pub-2860849627502538\"\r\n     data-ad-slot=\"3019501113\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script>\n<\/div>\n<p style=\"text-align: justify;\">Des chercheurs Fran\u00e7ais du CNRS, dans une \u00e9tude publi\u00e9e ce mercredi, affirment avoir r\u00e9solu l&rsquo;\u00e9nigme autour de la formation de la Terre.<\/p>\n<p style=\"text-align: justify;\">Des chercheurs pensent avoir r\u00e9solu une vieille \u00e9nigme entourant les origines de la Terre qui s&rsquo;est form\u00e9e il y a environ 4,5 milliards d&rsquo;ann\u00e9es \u00e0 partir de l&rsquo;agglom\u00e9ration de corps rocheux comme les ast\u00e9ro\u00efdes et les m\u00e9t\u00e9orites.<\/p>\n<p style=\"text-align: justify;\">Ces scientifiques bas\u00e9s en France estiment avoir compris pourquoi la composition chimique de la plan\u00e8te bleue diff\u00e8re de celle de m\u00e9t\u00e9orites ayant particip\u00e9 \u00e0 sa formation, alors que l&rsquo;on aurait pu s&rsquo;attendre \u00e0 ce qu&rsquo;elles soient tr\u00e8s semblables.<\/p>\n<p style=\"text-align: justify;\">La Terre a en effet moins de silicium et plus de magn\u00e9sium que les m\u00e9t\u00e9orites \u00e9tudi\u00e9es par ces chercheurs, les chondrites \u00e0 enstatite (un silicate), qui sont consid\u00e9r\u00e9es comme le mat\u00e9riau primordial de notre plan\u00e8te. Selon ces scientifiques, ce sont les nombreux impacts de m\u00e9t\u00e9orites subis par la Terre dans sa jeunesse qui lui auraient fait perdre de la masse et auraient modifi\u00e9 sa composition chimique.<\/p><div class=\"1665f18d14f35dd9e7566e1a8ac9a3e9\" data-index=\"2\" style=\"float: none; margin:10px 0 10px 0; text-align:center;\">\n<script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js\"><\/script>\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:block; text-align:center;\"\r\n     data-ad-layout=\"in-article\"\r\n     data-ad-format=\"fluid\"\r\n     data-ad-client=\"ca-pub-2860849627502538\"\r\n     data-ad-slot=\"3019501113\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script>\n<\/div>\n\n<p style=\"text-align: justify;\">\u00ab\u00a0Alors que la formation de notre plan\u00e8te a impliqu\u00e9 un tr\u00e8s grand nombre d&rsquo;impacts de m\u00e9t\u00e9orites, ceux-ci ont \u00e9rod\u00e9 la surface de la Terre primitive. Cela se serait produit au cours des premiers 100 millions d&rsquo;ann\u00e9es de l&rsquo;existence de celle-ci\u00a0\u00bb, estime-t-il. La Terre aurait perdu ainsi environ 15% de sa masse au cours de sa formation, ont calcul\u00e9 les chercheurs.<\/p>\n<p style=\"text-align: justify;\">L&rsquo;\u00e9tude men\u00e9e par des chercheurs du CNRS (Centre National de la Recherche Scientifique) et de l&rsquo;Universit\u00e9 Blaise Pascal de Clermont-Ferrand (France) est publi\u00e9e mercredi dans la revue britannique Nature Communications. \u00ab\u00a0Nous proposons un sc\u00e9nario complet de la formation de la Terre \u00e0 partir d&rsquo;un \u00e9chantillon de chondrites \u00e0 enstatite, ce qui n&rsquo;avait jamais \u00e9t\u00e9 fait auparavant\u00a0\u00bb, d\u00e9clare Denis Andrault, du laboratoire Magmas et volcans de l&rsquo;Universit\u00e9 Blaise Pascal.<\/p>\n<p style=\"text-align: justify;\">source :\u00a0<a href=\"http:\/\/www.bfmtv.com\/\" target=\"_blank\">http:\/\/www.bfmtv.com\/<\/a><\/p>\n<p class=\"bawpvc-ajax-counter\" data-id=\"8333\">(490)<\/p>\n<!--CusAds0-->\n<div style=\"font-size: 0px; height: 0px; line-height: 0px; margin: 0; padding: 0; clear: both;\"><\/div>","protected":false},"excerpt":{"rendered":"<p>Des chercheurs Fran\u00e7ais du CNRS, dans une \u00e9tude publi\u00e9e ce mercredi, affirment avoir r\u00e9solu l&rsquo;\u00e9nigme autour de la formation de&#8230;<\/p>\n","protected":false},"author":1,"featured_media":7799,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_exactmetrics_skip_tracking":false,"_exactmetrics_sitenote_active":false,"_exactmetrics_sitenote_note":"","_exactmetrics_sitenote_category":0,"ngg_post_thumbnail":0,"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[22,19],"tags":[118,743,538,282,117,430,3616,4660,75],"class_list":["post-8333","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-espace","category-seismes-et-volcans","tag-asteroide","tag-cnrs","tag-decouverte","tag-earth","tag-espace","tag-etude","tag-formation","tag-masse","tag-terre","wpcat-22-id","wpcat-19-id"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/07\/terre-2015.jpg?fit=750%2C750&ssl=1","jetpack_shortlink":"https:\/\/wp.me\/p631RN-2ap","jetpack-related-posts":[{"id":23715,"url":"https:\/\/www.laterredufutur.com\/accueil\/une-meteorite-revele-que-leau-de-la-terre-se-trouvait-dans-le-systeme-solaire-avant-la-terre-elle-meme\/","url_meta":{"origin":8333,"position":0},"title":"Une m\u00e9t\u00e9orite r\u00e9v\u00e8le que l&rsquo;eau de la Terre se trouvait dans le syst\u00e8me solaire avant la Terre elle-m\u00eame","author":"Admin","date":"5 f\u00e9vrier 2022","format":false,"excerpt":"Nous ne savons pas comment la vie a \u00e9merg\u00e9 sur Terre, mais une chose est certaine : la vie telle que nous la connaissons sur notre plan\u00e8te n'existerait pas sans les oc\u00e9ans, les fleuves, les rivi\u00e8res et la pluie. Notre plan\u00e8te est la seule connue pour abriter la vie, et\u2026","rel":"","context":"Dans &quot;Espace&quot;","block_context":{"text":"Espace","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/espace\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2021\/04\/soleil-ocean-vague.jpg?fit=1050%2C700&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2021\/04\/soleil-ocean-vague.jpg?fit=1050%2C700&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2021\/04\/soleil-ocean-vague.jpg?fit=1050%2C700&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2021\/04\/soleil-ocean-vague.jpg?fit=1050%2C700&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2021\/04\/soleil-ocean-vague.jpg?fit=1050%2C700&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":9178,"url":"https:\/\/www.laterredufutur.com\/accueil\/extinctions-de-masse-tous-les-26-millions-dannees\/","url_meta":{"origin":8333,"position":1},"title":"Extinctions de masse tous les 26 millions d&rsquo;ann\u00e9es","author":"Admin","date":"16 novembre 2015","format":false,"excerpt":"Tous les 26 millions d\u2019ann\u00e9es : quel cr\u00e9dit apporter \u00e0 l\u2019\u00e9tude qui affirme que l\u2019explication des extinctions de masse se trouve dans le rendez-vous cyclique de la Terre avec des m\u00e9t\u00e9orites g\u00e9antes ? Une nouvelle \u00e9tude d\u00e9montre de fa\u00e7on math\u00e9matique que la terre est percut\u00e9e par des m\u00e9t\u00e9orites tous les\u2026","rel":"","context":"Dans &quot;Espace&quot;","block_context":{"text":"Espace","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/espace\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/11\/Asteroide-meteorite.jpg?fit=768%2C559&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/11\/Asteroide-meteorite.jpg?fit=768%2C559&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/11\/Asteroide-meteorite.jpg?fit=768%2C559&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/11\/Asteroide-meteorite.jpg?fit=768%2C559&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":27075,"url":"https:\/\/www.laterredufutur.com\/accueil\/limpact-dune-meteorite-geante-pourrait-avoir-declenche-un-glissement-de-terrain-massif-dans-le-grand-canyon-il-y-a-56-000-ans\/","url_meta":{"origin":8333,"position":2},"title":"L&rsquo;impact d&rsquo;une m\u00e9t\u00e9orite g\u00e9ante pourrait avoir d\u00e9clench\u00e9 un glissement de terrain massif dans le Grand Canyon il y a 56 000 ans","author":"Admin","date":"27 juillet 2025","format":false,"excerpt":"Des chercheurs ont d\u00e9couvert un lien entre deux \u00e9v\u00e9nements g\u00e9ologiques dans des lieux embl\u00e9matiques du sud-ouest des \u00c9tats-Unis, dont les scientifiques ne pensaient auparavant pas qu'ils avaient quelque chose \u00e0 voir l'un avec l'autre. L'impact d'une ancienne m\u00e9t\u00e9orite qui a form\u00e9 le crat\u00e8re Barringer en Arizona a envoy\u00e9 des ondes\u2026","rel":"","context":"Dans &quot;Arch\u00e9ologie&quot;","block_context":{"text":"Arch\u00e9ologie","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/archeologie\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2025\/07\/grand-canyon-meteorite-2.webp?fit=650%2C366&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2025\/07\/grand-canyon-meteorite-2.webp?fit=650%2C366&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2025\/07\/grand-canyon-meteorite-2.webp?fit=650%2C366&ssl=1&resize=525%2C300 1.5x"},"classes":[]},{"id":14894,"url":"https:\/\/www.laterredufutur.com\/accueil\/sil-y-avait-de-la-vie-sur-terre-il-y-a-4-milliards-dannees-alors-pourquoi-pas-sur-mars\/","url_meta":{"origin":8333,"position":3},"title":"S\u2019il y avait de la vie sur Terre, il y a 4 milliards d\u2019ann\u00e9es, alors pourquoi pas sur Mars?","author":"Admin","date":"21 mars 2017","format":false,"excerpt":"Des chercheurs ont d\u00e9couvert des microfossiles au nord-est du Qu\u00e9bec qu\u2019ils datent de quelque 4 milliards d\u2019ann\u00e9es, lorsque les conditions sur Terre et sur Mars n\u2019\u00e9taient pas si \u00e9loign\u00e9es\u2026 Pr\u00e9cisons-le tout de suite : on parle de micro-organismes, des fossiles dont la longueur n\u2019exc\u00e8de pas le demi-millim\u00e8tre et le diam\u00e8tre\u2026","rel":"","context":"Dans &quot;Espace&quot;","block_context":{"text":"Espace","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/espace\/"},"img":{"alt_text":"Mars","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2012\/11\/mars9.jpg?fit=450%2C266&ssl=1&resize=350%2C200","width":350,"height":200},"classes":[]},{"id":26246,"url":"https:\/\/www.laterredufutur.com\/accueil\/la-terre-a-probablement-ete-dotee-dun-anneau-qui-est-progressivement-retombe-sur-terre\/","url_meta":{"origin":8333,"position":4},"title":"La Terre a probablement \u00e9t\u00e9 dot\u00e9e d&rsquo;un anneau qui est progressivement retomb\u00e9 sur Terre","author":"Admin","date":"24 septembre 2024","format":false,"excerpt":"Il fut un temps o\u00f9 la Terre \u00e9tait peut-\u00eatre dot\u00e9e d'un anneau plan\u00e9taire qui lui \u00e9tait propre. Cet anneau hypoth\u00e9tique n'a pas dur\u00e9 longtemps, d'un point de vue cosmique : quelques dizaines de millions d'ann\u00e9es seulement. Mais il a \u00e9t\u00e9 suffisamment long pour laisser une trace durable dans les archives\u2026","rel":"","context":"Dans &quot;Divers&quot;","block_context":{"text":"Divers","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/divers\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2024\/09\/la-terre-entouree-des-anneaux.jpg?fit=1024%2C1024&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2024\/09\/la-terre-entouree-des-anneaux.jpg?fit=1024%2C1024&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2024\/09\/la-terre-entouree-des-anneaux.jpg?fit=1024%2C1024&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2024\/09\/la-terre-entouree-des-anneaux.jpg?fit=1024%2C1024&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":10427,"url":"https:\/\/www.laterredufutur.com\/accueil\/des-geologues-australiens-decouvrent-une-meteorite-plus-vieille-que-la-terre\/","url_meta":{"origin":8333,"position":5},"title":"Des g\u00e9ologues australiens d\u00e9couvrent une m\u00e9t\u00e9orite plus vieille que la Terre","author":"Admin","date":"9 janvier 2016","format":false,"excerpt":"Un fragment de m\u00e9t\u00e9orite, plus \u00e2g\u00e9 que la Terre elle-m\u00eame, a \u00e9t\u00e9 d\u00e9couvert en Australie, et il aurait pu\u00a0dispara\u00eetre\u00a0avant que les scientifiques puissent avoir\u00a0la chance de s'y rendre. L'op\u00e9ration de r\u00e9cup\u00e9ration a impliqu\u00e9 un r\u00e9seau de 32 observatoires de video\u00a0\u00e0 distance, une masse de calculs g\u00e9ographiques compliqu\u00e9s, un observateur a\u00e9rien,\u2026","rel":"","context":"Dans &quot;Espace&quot;","block_context":{"text":"Espace","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/espace\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2016\/01\/meteorite-plus-vieille-que-la-terre.jpg?fit=1024%2C415&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2016\/01\/meteorite-plus-vieille-que-la-terre.jpg?fit=1024%2C415&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2016\/01\/meteorite-plus-vieille-que-la-terre.jpg?fit=1024%2C415&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2016\/01\/meteorite-plus-vieille-que-la-terre.jpg?fit=1024%2C415&ssl=1&resize=700%2C400 2x"},"classes":[]}],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts\/8333","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/comments?post=8333"}],"version-history":[{"count":1,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts\/8333\/revisions"}],"predecessor-version":[{"id":8334,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts\/8333\/revisions\/8334"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/media\/7799"}],"wp:attachment":[{"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/media?parent=8333"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/categories?post=8333"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/tags?post=8333"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}