{"id":117024,"date":"2022-05-26T07:09:15","date_gmt":"2022-05-26T06:09:15","guid":{"rendered":"https:\/\/material-properties.org\/quest-ce-que-la-datation-uranium-plomb-definition\/"},"modified":"2022-06-01T09:27:31","modified_gmt":"2022-06-01T08:27:31","slug":"quest-ce-que-la-datation-uranium-plomb-definition","status":"publish","type":"post","link":"https:\/\/material-properties.org\/fr\/quest-ce-que-la-datation-uranium-plomb-definition\/","title":{"rendered":"Qu&rsquo;est-ce que la datation uranium-plomb &#8211; D\u00e9finition"},"content":{"rendered":"<p><span><div class=\"su-quote su-quote-style-default\"><div class=\"su-quote-inner su-u-clearfix su-u-trim\">La datation uranium-plomb est bas\u00e9e sur la mesure du premier et du dernier membre de la s\u00e9rie de l&rsquo;uranium.\u00a0La datation uranium-plomb est l&rsquo;une des plus anciennes m\u00e9thodes de datation radiom\u00e9trique.\u00a0Propri\u00e9t\u00e9s des mat\u00e9riaux<\/div><\/div><\/span><\/p>\n<p><span><div class=\"su-divider su-divider-style-dotted\" style=\"margin:15px 0;border-width:2px;border-color:#999999\"><\/div><\/span><\/p>\n<p><span><div  class=\"lgc-column lgc-grid-parent lgc-grid-100 lgc-tablet-grid-100 lgc-mobile-grid-100 lgc-equal-heights \"><div  class=\"inside-grid-column\">\n<p><strong><span>La datation radiom\u00e9trique<\/span><\/strong><span>\u00a0(ou datation radioactive) est toute technique utilis\u00e9e pour dater des mat\u00e9riaux organiques et inorganiques issus d&rsquo;un processus impliquant une\u00a0<\/span><strong><span>d\u00e9sint\u00e9gration radioactive<\/span><\/strong><span>.\u00a0La m\u00e9thode compare l&rsquo;abondance d&rsquo;un isotope radioactif naturel dans le mat\u00e9riau \u00e0 l&rsquo;abondance de ses produits de d\u00e9sint\u00e9gration, qui se forment \u00e0 un taux de d\u00e9sint\u00e9gration constant connu.<\/span><\/p>\n<p><span>La\u00a0<\/span><a href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/radioactive-decay\/radioactive-decay-law\/\"><strong><span>loi de d\u00e9sint\u00e9gration radioactive<\/span><\/strong><\/a><span>\u00a0stipule que la probabilit\u00e9 par unit\u00e9 de temps qu&rsquo;un noyau se d\u00e9sint\u00e8gre est une constante, ind\u00e9pendante du temps.\u00a0Cette constante est appel\u00e9e\u00a0<\/span><strong><span>constante de d\u00e9croissance<\/span><\/strong><span> et est not\u00e9e \u03bb, \u00ablambda\u00bb. Cette probabilit\u00e9 constante peut varier consid\u00e9rablement entre les diff\u00e9rents types de noyaux, ce qui conduit aux nombreux taux de d\u00e9sint\u00e9gration observ\u00e9s.\u00a0La d\u00e9sint\u00e9gration radioactive d&rsquo;un certain nombre d&rsquo;atomes (masse) est exponentielle dans le temps.<\/span><\/p>\n<p style=\"text-align: center;\"><strong><span>Loi de d\u00e9croissance radioactive: N = N <\/span><\/strong><strong><sub><span>0<\/span><\/sub><\/strong><strong><span>\u00a0.e\u00a0<\/span><\/strong><strong><sup><span>-\u03bbt<\/span><\/sup><\/strong><\/p>\n<p><span>L&rsquo;une des plus anciennes m\u00e9thodes de datation radiom\u00e9trique est la datation\u00a0<\/span><strong><span>uranium-plomb<\/span><\/strong><span>.\u00a0L&rsquo;\u00e2ge de la cro\u00fbte terrestre peut \u00eatre estim\u00e9 \u00e0 partir du rapport entre les quantit\u00e9s d&rsquo;uranium 238 et de plomb 206 trouv\u00e9es dans les sp\u00e9cimens g\u00e9ologiques.\u00a0La longue demi-vie de l&rsquo;isotope\u00a0<\/span><a href=\"https:\/\/www.nuclear-power.com\/nuclear-power-plant\/nuclear-fuel\/uranium\/uranium-238\/\"><span>uranium-238<\/span><\/a><span> (4,51 \u00d7 10<\/span><sup><span>9<\/span><\/sup><span>\u00a0ans) le rend bien adapt\u00e9 pour une utilisation dans l&rsquo;estimation de l&rsquo;\u00e2ge des premi\u00e8res roches ign\u00e9es et pour d&rsquo;autres types de datation radiom\u00e9trique, y compris la datation uranium-thorium et l&rsquo;uranium- datation \u00e0 l&rsquo;uranium.<\/span><\/p>\n<p><strong><span>La datation uranium-plomb<\/span><\/strong><span>\u00a0est bas\u00e9e sur la mesure du\u00a0<\/span><strong><span>premier<\/span><\/strong><span>\u00a0et du\u00a0<\/span><strong><span>dernier membre<\/span><\/strong><span>\u00a0de la\u00a0<\/span><strong><a href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/radioactive-decay\/radioactive-decay-chain\/radioactive-series-radioactive-cascade\/uranium-series\/\"><span>s\u00e9rie de l&rsquo;uranium<\/span><\/a><\/strong><a href=\"https:\/\/www.nuclear-power.com\/nuclear-power-plant\/nuclear-fuel\/uranium\/uranium-238\/\"><span>\u00a0, qui est l&rsquo;une des trois s\u00e9ries radioactives classiques commen\u00e7ant par l&rsquo; uranium-238<\/span><\/a><span>\u00a0d&rsquo;origine naturelle\u00a0.\u00a0Cette cha\u00eene de d\u00e9sint\u00e9gration radioactive est constitu\u00e9e de noyaux atomiques lourds instables qui se\u00a0<\/span><a href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/radioactive-decay\/\"><span>d\u00e9sint\u00e8grent<\/span><\/a><span>\u00a0par une s\u00e9quence de d\u00e9sint\u00e9grations\u00a0<\/span><a href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/radioactive-decay\/alpha-decay-alpha-radioactivity\/\"><span>alpha<\/span><\/a><span>\u00a0et\u00a0<\/span><a href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/radioactive-decay\/beta-decay-beta-radioactivity\/\"><span>b\u00eata<\/span><\/a> <span>jusqu&rsquo;\u00e0 l&rsquo;obtention d&rsquo;un noyau stable.\u00a0Dans le cas de la s\u00e9rie de l&rsquo;uranium, le noyau stable est le plomb-206.\u00a0L&rsquo;hypoth\u00e8se retenue est que tous les noyaux de plomb-206 trouv\u00e9s dans le sp\u00e9cimen aujourd&rsquo;hui \u00e9taient \u00e0 l&rsquo;origine des noyaux d&rsquo;uranium-238.\u00a0Cela signifie qu&rsquo;\u00e0 la formation de la cro\u00fbte, le sp\u00e9cimen ne contenait aucun noyau de plomb-206.\u00a0Si aucun autre isotope du plomb n&rsquo;est trouv\u00e9 dans l&rsquo;\u00e9chantillon, il s&rsquo;agit d&rsquo;une hypoth\u00e8se raisonnable.\u00a0Dans ces conditions, l&rsquo;\u00e2ge de l&rsquo;\u00e9chantillon peut \u00eatre calcul\u00e9 en supposant une d\u00e9croissance exponentielle de l&rsquo;uranium-238.\u00a0C&rsquo;est-\u00e0-dire:<\/span><\/p>\n<p><a href=\"http:\/\/material-properties.org\/wp-content\/uploads\/2019\/05\/uranium-lead-method-age-of-the-Earth.png\"><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter size-full wp-image-25289\" src=\"http:\/\/material-properties.org\/wp-content\/uploads\/2019\/05\/uranium-lead-method-age-of-the-Earth.png\" alt=\"m\u00e9thode uranium-plomb - \u00e2ge de la Terre\" width=\"599\" height=\"171\" \/><\/a><\/p>\n<p><strong><span>La m\u00e9thode de datation uranium-plomb<\/span><\/strong><span>\u00a0est g\u00e9n\u00e9ralement effectu\u00e9e sur le\u00a0<\/span><strong><span>min\u00e9ral zircon<\/span><\/strong><span>.\u00a0Les zircons de Jack Hills en Australie-Occidentale ont produit des \u00e2ges U-Pb allant jusqu&rsquo;\u00e0\u00a0<\/span><strong><span>4,404 milliards d&rsquo;ann\u00e9es<\/span><\/strong><span>, interpr\u00e9t\u00e9s comme l&rsquo;\u00e2ge de la cristallisation, ce qui en fait les min\u00e9raux les plus anciens \u00e0 ce jour sur Terre.<\/span><\/p>\n<h2><span>\u00c2ge de la Terre &#8211; Datation uranium-plomb<\/span><\/h2>\n<p><span>L&rsquo;\u00a0<\/span><strong><span>\u00e2ge de la Terre<\/span><\/strong><span>\u00a0est d&rsquo;environ\u00a0<\/span><strong><span>4,54 milliards d&rsquo;ann\u00e9es<\/span><\/strong><span>.\u00a0Cette datation est bas\u00e9e sur des preuves de la datation radiom\u00e9trique des mat\u00e9riaux m\u00e9t\u00e9oritiques et est coh\u00e9rente avec les \u00e2ges radiom\u00e9triques des plus anciens \u00e9chantillons terrestres et lunaires connus.<\/span><\/p>\n<p><span>\u00a0<\/span><\/p>\n<p><span><\/span><\/p><\/div><\/div><\/span><\/p>\n<p><span><div  class=\"lgc-column lgc-grid-parent lgc-grid-100 lgc-tablet-grid-100 lgc-mobile-grid-100 lgc-equal-heights \"><div  class=\"inside-grid-column\"><div class=\"su-spoiler su-spoiler-style-default su-spoiler-icon-arrow\" data-anchor=\"R\u00e9f\u00e9rences\" data-scroll-offset=\"0\" data-anchor-in-url=\"no\"><div class=\"su-spoiler-title\" tabindex=\"0\" role=\"button\"><span class=\"su-spoiler-icon\"><\/span>R\u00e9f\u00e9rences :<\/div><div class=\"su-spoiler-content su-u-clearfix su-u-trim\">\n<p><strong><span>Protection contre les radiations:<\/span><\/strong><\/p>\n<ol>\n<li><span>Knoll, Glenn F., Radiation Detection and Measurement 4th Edition, Wiley, 8\/2010.\u00a0ISBN-13\u00a0: 978-0470131480.<\/span><\/li>\n<li><span>Stabin, Michael G., Radioprotection et dosim\u00e9trie : une introduction \u00e0 la physique de la sant\u00e9, Springer, 10\/2010.\u00a0ISBN-13\u00a0: 978-1441923912.<\/span><\/li>\n<li><span>Martin, James E., Physics for Radiation Protection 3rd Edition, Wiley-VCH, 4\/2013.\u00a0ISBN-13\u00a0: 978-3527411764.<\/span><\/li>\n<li><span>USNRC, CONCEPTS DE R\u00c9ACTEURS NUCL\u00c9AIRES<\/span><\/li>\n<li><span>D\u00e9partement am\u00e9ricain de l&rsquo;\u00e9nergie, de la physique nucl\u00e9aire et de la th\u00e9orie des r\u00e9acteurs.\u00a0DOE Fundamentals Handbook, Volume 1 et 2. Janvier 1993.<\/span><\/li>\n<\/ol>\n<p><strong><span>Physique nucl\u00e9aire et des r\u00e9acteurs:<\/span><\/strong><\/p>\n<ol>\n<li><span>JR Lamarsh, Introduction \u00e0 la th\u00e9orie des r\u00e9acteurs nucl\u00e9aires, 2e \u00e9d., Addison-Wesley, Reading, MA (1983).<\/span><\/li>\n<li><span>JR Lamarsh, AJ Baratta, Introduction au g\u00e9nie nucl\u00e9aire, 3e \u00e9d., Prentice-Hall, 2001, ISBN : 0-201-82498-1.<\/span><\/li>\n<li><span>WM Stacey, Physique des r\u00e9acteurs nucl\u00e9aires, John Wiley &amp; Sons, 2001, ISBN : 0-471-39127-1.<\/span><\/li>\n<li><span>Glasstone, Sesonsk\u00e9.\u00a0Ing\u00e9nierie des r\u00e9acteurs nucl\u00e9aires\u00a0: Ing\u00e9nierie des syst\u00e8mes de r\u00e9acteurs, Springer\u00a0;\u00a04e \u00e9dition, 1994, ISBN : 978-0412985317<\/span><\/li>\n<li><span>WSC Williams.\u00a0Physique nucl\u00e9aire et des particules.\u00a0Presse Clarendon\u00a0;\u00a01 \u00e9dition, 1991, ISBN : 978-0198520467<\/span><\/li>\n<li><span>GRKeep.\u00a0Physique de la cin\u00e9tique nucl\u00e9aire.\u00a0Pub Addison-Wesley.\u00a0Co;\u00a01\u00e8re \u00e9dition, 1965<\/span><\/li>\n<li><span>Robert Reed Burn, Introduction au fonctionnement des r\u00e9acteurs nucl\u00e9aires, 1988.<\/span><\/li>\n<li><span>D\u00e9partement am\u00e9ricain de l&rsquo;\u00e9nergie, de la physique nucl\u00e9aire et de la th\u00e9orie des r\u00e9acteurs.\u00a0DOE Fundamentals Handbook, Volume 1 et 2. Janvier 1993.<\/span><\/li>\n<li><span>Paul Reuss, Physique des neutrons.\u00a0EDP \u200b\u200bSciences, 2008. ISBN : 978-2759800414.<\/span><\/li>\n<\/ol>\n<p><span><\/span><\/p><\/div><\/div><div class=\"su-divider su-divider-style-dotted\" style=\"margin:15px 0;border-width:2px;border-color:#999999\"><\/div><\/div><\/div><\/span><\/p>\n<p><span><div  class=\"lgc-column lgc-grid-parent lgc-grid-33 lgc-tablet-grid-33 lgc-mobile-grid-100 lgc-equal-heights \"><div  class=\"inside-grid-column\"><\/div><\/div><div  class=\"lgc-column lgc-grid-parent lgc-grid-33 lgc-tablet-grid-33 lgc-mobile-grid-100 lgc-equal-heights \"><div  class=\"inside-grid-column\">\n<h2><span>Voir \u00e9galement:<\/span><\/h2>\n<p><span>Datation radiom\u00e9trique<a href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/radioactive-decay\/radiometric-dating-radioactive-dating\/\" class=\"su-button su-button-style-flat \" style=\"color:#606060;background-color:#ffffff;border-color:#cccccc;border-radius:10px;-moz-border-radius:10px;-webkit-border-radius:10px\" target=\"_self\"><span style=\"color:#606060;padding:7px 20px;font-size:16px;line-height:24px;border-color:#ffffff;border-radius:10px;-moz-border-radius:10px;-webkit-border-radius:10px;text-shadow:0px 0px 0px #000000;-moz-text-shadow:0px 0px 0px #000000;-webkit-text-shadow:0px 0px 0px #000000\"><img src=\"icon : lien\" alt=\"\" style=\"width:24px;height:24px\" \/> <\/span><\/a> <\/span><\/p><\/div><\/div><div  class=\"lgc-column lgc-grid-parent lgc-grid-33 lgc-tablet-grid-33 lgc-mobile-grid-100 lgc-equal-heights \"><div  class=\"inside-grid-column\"><\/div><\/div><\/span><\/p>\n<p><span><div class=\"su-divider su-divider-style-dotted\" style=\"margin:15px 0;border-width:2px;border-color:#999999\"><\/div><\/span><\/p>\n<p><span>Nous esp\u00e9rons que cet article,\u00a0<\/span><strong><span>Uranium-plomb Rencontre<\/span><\/strong><span>, vous aide.\u00a0Si oui,\u00a0<\/span><strong><span>donnez-nous un like<\/span><\/strong><span>\u00a0dans la barre lat\u00e9rale.\u00a0L&rsquo;objectif principal de ce site Web est d&rsquo;aider le public \u00e0 apprendre des informations int\u00e9ressantes et importantes sur les mat\u00e9riaux et leurs propri\u00e9t\u00e9s.<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Nous esp\u00e9rons que cet article,\u00a0Uranium-plomb Rencontre, vous aide.\u00a0Si oui,\u00a0donnez-nous un like\u00a0dans la barre lat\u00e9rale.\u00a0L&rsquo;objectif principal de ce site Web est d&rsquo;aider le public \u00e0 apprendre des informations int\u00e9ressantes et importantes sur les mat\u00e9riaux et leurs propri\u00e9t\u00e9s.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.2 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Qu&#039;est-ce que la datation uranium-plomb - D\u00e9finition<\/title>\n<meta name=\"description\" content=\"La datation uranium-plomb est bas\u00e9e sur la mesure du premier et du dernier membre de la s\u00e9rie de l&#039;uranium. 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La datation uranium-plomb est l'une des plus anciennes m\u00e9thodes de datation radiom\u00e9trique. Tableau p\u00e9riodique","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/material-properties.org\/fr\/quest-ce-que-la-datation-uranium-plomb-definition\/","og_locale":"fr_FR","og_type":"article","og_title":"Qu'est-ce que la datation uranium-plomb - D\u00e9finition","og_description":"La datation uranium-plomb est bas\u00e9e sur la mesure du premier et du dernier membre de la s\u00e9rie de l'uranium. La datation uranium-plomb est l'une des plus anciennes m\u00e9thodes de datation radiom\u00e9trique. Tableau p\u00e9riodique","og_url":"https:\/\/material-properties.org\/fr\/quest-ce-que-la-datation-uranium-plomb-definition\/","og_site_name":"Material Properties","article_published_time":"2022-05-26T06:09:15+00:00","article_modified_time":"2022-06-01T08:27:31+00:00","og_image":[{"url":"http:\/\/material-properties.org\/wp-content\/uploads\/2019\/05\/uranium-lead-method-age-of-the-Earth.png"}],"author":"Nick Connor","twitter_card":"summary_large_image","twitter_misc":{"\u00c9crit par":"Nick Connor","Dur\u00e9e de lecture estim\u00e9e":"5 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/material-properties.org\/fr\/quest-ce-que-la-datation-uranium-plomb-definition\/","url":"https:\/\/material-properties.org\/fr\/quest-ce-que-la-datation-uranium-plomb-definition\/","name":"Qu'est-ce que la datation uranium-plomb - D\u00e9finition","isPartOf":{"@id":"https:\/\/material-properties.org\/fr\/#website"},"datePublished":"2022-05-26T06:09:15+00:00","dateModified":"2022-06-01T08:27:31+00:00","author":{"@id":"https:\/\/material-properties.org\/fr\/#\/schema\/person\/e8c544db9afedaec8574d6464f9398bb"},"description":"La datation uranium-plomb est bas\u00e9e sur la mesure du premier et du dernier membre de la s\u00e9rie de l'uranium. La datation uranium-plomb est l'une des plus anciennes m\u00e9thodes de datation radiom\u00e9trique. 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