{"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":"2026-06-07T20:28:11","modified_gmt":"2026-06-07T20:28:11","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>\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=\"https:\/\/www.bfmtv.com\/\">http:\/\/www.bfmtv.com\/<\/a><\/p>\n<p class=\"bawpvc-ajax-counter\" data-id=\"8333\">(518)<\/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,"ngg_post_thumbnail":0,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_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},"jetpack_post_was_ever_published":false},"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_shortlink":"https:\/\/wp.me\/p631RN-2ap","jetpack-related-posts":[{"id":29451,"url":"https:\/\/www.laterredufutur.com\/accueil\/lasteroide-ryugu-revele-les-cinq-bases-de-ladn-et-de-larn-les-ingredients-de-la-vie-viendraient-ils-de-lespace\/","url_meta":{"origin":8333,"position":0},"title":"L&rsquo;Ast\u00e9ro\u00efde Ryugu r\u00e9v\u00e8le les cinq bases de l\u2019ADN et de l\u2019ARN : les ingr\u00e9dients de la vie viendraient ils de l\u2019espace ?","author":"Admin","date":"26 ao\u00fbt 2026","format":false,"excerpt":"L\u2019id\u00e9e fascine autant qu\u2019elle interroge : une partie des ingr\u00e9dients ayant permis l\u2019apparition de la vie sur Terre pourrait avoir \u00e9t\u00e9 apport\u00e9e depuis l\u2019espace. Cette hypoth\u00e8se vient de recevoir un nouvel argument de poids gr\u00e2ce \u00e0 l\u2019analyse de minuscules fragments pr\u00e9lev\u00e9s sur Ryugu, un ast\u00e9ro\u00efde situ\u00e9 \u00e0 plusieurs centaines de\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\/2026\/08\/asteroide-essence-de-la-vie.png?fit=1200%2C675&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2026\/08\/asteroide-essence-de-la-vie.png?fit=1200%2C675&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2026\/08\/asteroide-essence-de-la-vie.png?fit=1200%2C675&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2026\/08\/asteroide-essence-de-la-vie.png?fit=1200%2C675&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2026\/08\/asteroide-essence-de-la-vie.png?fit=1200%2C675&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":28905,"url":"https:\/\/www.laterredufutur.com\/accueil\/une-meteorite-venue-de-la-lune-revele-son-passe-volcanique-et-son-ocean-de-magma\/","url_meta":{"origin":8333,"position":1},"title":"Une m\u00e9t\u00e9orite venue de la Lune r\u00e9v\u00e8le son pass\u00e9 volcanique et son oc\u00e9an de magma","author":"Admin","date":"29 juin 2026","format":false,"excerpt":"Une m\u00e9t\u00e9orite lunaire rare tomb\u00e9e sur Terre porte la trace d'un impact jusqu'alors inconnu qui a secou\u00e9 la Lune il y a environ 3,5 milliards d'ann\u00e9es, selon des chercheurs. L'\u00e9tude de cet impact ancien apporte un \u00e9clairage nouveau sur le fonctionnement du syst\u00e8me solaire \u00e0 ses d\u00e9buts, \u00e0 peu pr\u00e8s\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\/2026\/06\/impact-lunaire.webp?fit=1024%2C576&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2026\/06\/impact-lunaire.webp?fit=1024%2C576&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2026\/06\/impact-lunaire.webp?fit=1024%2C576&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2026\/06\/impact-lunaire.webp?fit=1024%2C576&ssl=1&resize=700%2C400 2x"},"classes":[]},{"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":2},"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":3},"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":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":4},"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":5},"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":[]}],"jetpack_sharing_enabled":true,"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","_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}]}}