{"id":4329,"date":"2026-08-28T14:03:07","date_gmt":"2026-08-28T12:03:07","guid":{"rendered":"https:\/\/www.minesparis.psl.eu\/musee\/?page_id=4329"},"modified":"2026-09-03T13:45:39","modified_gmt":"2026-09-03T11:45:39","slug":"classification-meteorites","status":"publish","type":"page","link":"https:\/\/www.minesparis.psl.eu\/musee\/le-musee\/collections\/les-meteorites\/classification-meteorites\/","title":{"rendered":"Qu\u2019est-ce qu\u2019une m\u00e9t\u00e9orite ?"},"content":{"rendered":"\n<div class=\"container bloc-50-50\">\n\t<div class=\"row mt-4\">\n\t\t<div class=\"col-md-6\">\n\t\t\t<h2>Comment se classent les m\u00e9t\u00e9orites ?<\/h2>\n<p>Les m\u00e9t\u00e9orites sont regroup\u00e9es en deux diff\u00e9rents groupes, suivant la nature du corps c\u00e9leste dont elles sont issues : les m\u00e9t\u00e9orites primitives (appel\u00e9es aussi m\u00e9t\u00e9orites non diff\u00e9renci\u00e9es) et les m\u00e9t\u00e9orites diff\u00e9renci\u00e9es.<\/p>\n\t\t<\/div>\n\t\t<div class=\"col-md-6\">\n\t\t\t<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-4339 size-full\" src=\"https:\/\/www.minesparis.psl.eu\/musee\/wp-content\/uploads\/sites\/29\/2026\/08\/821-Classification-Meteorites-544px.png\" alt=\"\" width=\"544\" height=\"248\" srcset=\"https:\/\/www.minesparis.psl.eu\/musee\/wp-content\/uploads\/sites\/29\/2026\/08\/821-Classification-Meteorites-544px.png 544w, https:\/\/www.minesparis.psl.eu\/musee\/wp-content\/uploads\/sites\/29\/2026\/08\/821-Classification-Meteorites-544px-300x137.png 300w\" sizes=\"auto, (max-width: 544px) 100vw, 544px\" \/><\/p>\n\t\t<\/div>\n\t<\/div>\n<\/div>\n\n\n<div class=\"container block-full-largeur\">\n\t<div class=\"row mt-4\">\n\t\t<div class=\"col-md-12\">\n\t\t\t<hr \/>\n\t\t<\/div>\n\t<\/div>\n<\/div>\n\n\n<div class=\"container bloc-50-50\">\n\t<div class=\"row mt-4\">\n\t\t<div class=\"col-md-6\">\n\t\t\t<h2>Les m\u00e9t\u00e9orites primitives<\/h2>\n<p>Les m\u00e9t\u00e9orites primitives (aussi appel\u00e9es m\u00e9t\u00e9orites non diff\u00e9renci\u00e9es) sont issues d&rsquo;un corps primitif qui a conserv\u00e9 la mati\u00e8re originelle aillant form\u00e9 tous les objets du Syst\u00e8me Solaire. Grains de silicates et de m\u00e9tal s&rsquo;y c\u00f4toient. Les chondrites sont form\u00e9es de petites billes plus ou moins d\u00e9form\u00e9es (les chondres) agr\u00e9g\u00e9es les unes aux autres. On y trouve <strong>principalement quatre groupes dont les deux principaux sont<\/strong> :<\/p>\n<p>&nbsp;<\/p>\n<h4>&#8211; les \u00ab chondrites ordinaires \u00bb<\/h4>\n<p>Elles repr\u00e9sentent pr\u00e8s de 80% des chondrites, elles sont surtout constitu\u00e9es d\u2019olivine, de pyrox\u00e8ne, de feldspath, de fer, de nickel, etc.<\/p>\n<h4>&#8211; les \u00ab\u00a0chondrites carbon\u00e9es\u00a0\u00bb<\/h4>\n<p>Elles sont constitu\u00e9es de feldspath et d\u2019\u00e9l\u00e9ments carbon\u00e9s, et parfois tr\u00e8s peu de fer.<\/p>\n\t\t<\/div>\n\t\t<div class=\"col-md-6\">\n\t\t\t<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-4333\" src=\"https:\/\/www.minesparis.psl.eu\/musee\/wp-content\/uploads\/sites\/29\/2026\/08\/1513_Farmington-chondrite_web-300x225.jpg\" alt=\"\" width=\"585\" height=\"439\" srcset=\"https:\/\/www.minesparis.psl.eu\/musee\/wp-content\/uploads\/sites\/29\/2026\/08\/1513_Farmington-chondrite_web-300x225.jpg 300w, https:\/\/www.minesparis.psl.eu\/musee\/wp-content\/uploads\/sites\/29\/2026\/08\/1513_Farmington-chondrite_web-1024x768.jpg 1024w, https:\/\/www.minesparis.psl.eu\/musee\/wp-content\/uploads\/sites\/29\/2026\/08\/1513_Farmington-chondrite_web-768x576.jpg 768w, https:\/\/www.minesparis.psl.eu\/musee\/wp-content\/uploads\/sites\/29\/2026\/08\/1513_Farmington-chondrite_web.jpg 1200w\" sizes=\"auto, (max-width: 585px) 100vw, 585px\" \/><\/p>\n<p>M\u00e9t\u00e9orite \u00ab\u00a0Farmington\u00a0\u00bb : m\u00e9t\u00e9orite ordinaire L5 &#8211; zoom sur la mati\u00e8re, avec les chondres visibles (ENSMP 1513). <em><span class=\"x193iq5w xeuugli x13faqbe x1vvkbs x1xmvt09 x1lliihq x1s928wv xhkezso x1gmr53x x1cpjm7i x1fgarty x1943h6x xudqn12 x3x7a5m x6prxxf xvq8zen xo1l8bm xzsf02u x1yc453h\" dir=\"auto\">\u00a9 Mus\u00e9e de Min\u00e9ralogie Mines Paris \u2013 PSL \/ L&rsquo;ECOLE des Arts Joailliers \/ Benjamin Chelly.<\/span><\/em><\/p>\n\t\t<\/div>\n\t<\/div>\n<\/div>\n\n\n<div class=\"container block-full-largeur\">\n\t<div class=\"row mt-4\">\n\t\t<div class=\"col-md-12\">\n\t\t\t<hr \/>\n\t\t<\/div>\n\t<\/div>\n<\/div>\n\n\n<div class=\"container bloc-50-50\">\n\t<div class=\"row mt-4\">\n\t\t<div class=\"col-md-6\">\n\t\t\t<h2>Les m\u00e9t\u00e9orites diff\u00e9renci\u00e9es<\/h2>\n<p>Elles sont issues d&rsquo;un corps diff\u00e9renci\u00e9, c&rsquo;est-\u00e0-dire que le corps c\u00e9leste \u00e9tait suffisamment gros pour voir sa mati\u00e8re originelle fondre pour ensuite se s\u00e9parer en diff\u00e9rentes couches. La Terre est par exemple un corps diff\u00e9renci\u00e9e avec une cro\u00fbte, un manteau et un noyau.<\/p>\n<h4>&#8211; Les rares achondrites<\/h4>\n<p>Ce sont des m\u00e9t\u00e9orites provenant de la surface de gros ast\u00e9ro\u00efdes ou de plan\u00e8tes. Elles ressemblent \u00e0 nos roches terrestres.<\/p>\n<h4>&#8211; Les m\u00e9t\u00e9orites ferreuses (sid\u00e9rites)<\/h4>\n<p>Ce sont des morceaux de noyaux d\u2019ast\u00e9ro\u00efdes. Elles sont surtout constitu\u00e9es de fer et de nickel.<\/p>\n<h4>&#8211; Les lithosid\u00e9rites<\/h4>\n<p>Ce sont des m\u00e9t\u00e9orites mixtes compos\u00e9es de parties ferreuses (fer et nickel) et de silicates. On distingue deux types de lithosid\u00e9rites : les m\u00e9sosid\u00e9rites et les pallasites.<\/p>\n\t\t<\/div>\n\t\t<div class=\"col-md-6\">\n\t\t\t<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-4332\" src=\"https:\/\/www.minesparis.psl.eu\/musee\/wp-content\/uploads\/sites\/29\/2026\/08\/76760_Pallasite_Esquel_Benj_Chelly_Zoom-300x225.jpg\" alt=\"\" width=\"585\" height=\"439\" srcset=\"https:\/\/www.minesparis.psl.eu\/musee\/wp-content\/uploads\/sites\/29\/2026\/08\/76760_Pallasite_Esquel_Benj_Chelly_Zoom-300x225.jpg 300w, https:\/\/www.minesparis.psl.eu\/musee\/wp-content\/uploads\/sites\/29\/2026\/08\/76760_Pallasite_Esquel_Benj_Chelly_Zoom-1024x768.jpg 1024w, https:\/\/www.minesparis.psl.eu\/musee\/wp-content\/uploads\/sites\/29\/2026\/08\/76760_Pallasite_Esquel_Benj_Chelly_Zoom-768x576.jpg 768w, https:\/\/www.minesparis.psl.eu\/musee\/wp-content\/uploads\/sites\/29\/2026\/08\/76760_Pallasite_Esquel_Benj_Chelly_Zoom-1536x1152.jpg 1536w, https:\/\/www.minesparis.psl.eu\/musee\/wp-content\/uploads\/sites\/29\/2026\/08\/76760_Pallasite_Esquel_Benj_Chelly_Zoom-1300x975.jpg 1300w, https:\/\/www.minesparis.psl.eu\/musee\/wp-content\/uploads\/sites\/29\/2026\/08\/76760_Pallasite_Esquel_Benj_Chelly_Zoom.jpg 1601w\" sizes=\"auto, (max-width: 585px) 100vw, 585px\" \/><\/p>\n<p>M\u00e9t\u00e9orite \u00ab\u00a0Esquel\u00a0\u00bb : pallasite zoom sur la mati\u00e8re, avec les cristaux d&rsquo;olivine jaune-vert dans une matrice m\u00e9tallique (ENSMP 76760). <em><span class=\"x193iq5w xeuugli x13faqbe x1vvkbs x1xmvt09 x1lliihq x1s928wv xhkezso x1gmr53x x1cpjm7i x1fgarty x1943h6x xudqn12 x3x7a5m x6prxxf xvq8zen xo1l8bm xzsf02u x1yc453h\" dir=\"auto\">\u00a9 Mus\u00e9e de Min\u00e9ralogie Mines Paris \u2013 PSL \/ L&rsquo;ECOLE des Arts Joailliers \/ Benjamin Chelly.<\/span><\/em><\/p>\n\t\t<\/div>\n\t<\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"","protected":false},"author":4,"featured_media":4335,"parent":1055,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"footnotes":""},"class_list":["post-4329","page","type-page","status-publish","has-post-thumbnail","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Qu&#039;est-ce qu&#039;une m\u00e9t\u00e9orite ? 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