{"id":521,"date":"2016-12-04T18:00:23","date_gmt":"2016-12-04T18:00:23","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/frankel\/?p=521"},"modified":"2016-12-31T11:54:17","modified_gmt":"2016-12-31T11:54:17","slug":"curiosity-lac-martien","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/frankel\/2016\/12\/04\/curiosity-lac-martien\/","title":{"rendered":"Curiosity et son lac martien"},"content":{"rendered":"<figure id=\"attachment_528\" aria-describedby=\"caption-attachment-528\" style=\"width: 1024px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/blogs.futura-sciences.com\/frankel\/wp-content\/uploads\/sites\/7\/2016\/12\/Murray-Buttes-selfie-18-Sep.jpg\" rel=\"lightbox[521]\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-528\" src=\"https:\/\/blogs.futura-sciences.com\/frankel\/wp-content\/uploads\/sites\/7\/2016\/12\/Murray-Buttes-selfie-18-Sep.jpg\" alt=\"Curiosity au lieu-dit &quot;Murray Butte&quot; en septembre 2016: le fond boueux d'un ancien lac...\" width=\"1024\" height=\"610\" srcset=\"https:\/\/blogs.futura-sciences.com\/frankel\/wp-content\/uploads\/sites\/7\/2016\/12\/Murray-Buttes-selfie-18-Sep.jpg 1024w, https:\/\/blogs.futura-sciences.com\/frankel\/wp-content\/uploads\/sites\/7\/2016\/12\/Murray-Buttes-selfie-18-Sep-450x268.jpg 450w, https:\/\/blogs.futura-sciences.com\/frankel\/wp-content\/uploads\/sites\/7\/2016\/12\/Murray-Buttes-selfie-18-Sep-768x458.jpg 768w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><figcaption id=\"caption-attachment-528\" class=\"wp-caption-text\">Curiosity au lieu-dit &#8220;Murray Butte&#8221; en septembre 2016: le fond boueux d&#8217;un ancien lac&#8230;<\/figcaption><\/figure>\n<p>Le robot automobile Curiosity de la NASA, avec \u00e0 son bord des instruments d\u2019analyse fran\u00e7ais, continue avec succ\u00e8s son exploration du crat\u00e8re Gale, d\u00e9but\u00e9e en ao\u00fbt 2012. Le robot roule actuellement sur le fond d\u2019un ancien lac, une argile \u00e0 grain fin (mudstone) cartographi\u00e9e sous le nom de formation Murray (en honneur au feu plan\u00e9tologue et ancien directeur du Jet Propulsion Laboratory, Bruce Murray). Au terme de quatre ann\u00e9es d\u2019\u00e9tudes sur le terrain, Curiosity confirme que le grand crat\u00e8re d\u2019impact a abrit\u00e9 un lac durant un long intervalle de temps.<!--more--><\/p>\n<figure id=\"attachment_529\" aria-describedby=\"caption-attachment-529\" style=\"width: 1024px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/blogs.futura-sciences.com\/frankel\/wp-content\/uploads\/sites\/7\/2016\/12\/Mount-Sharp-route.jpg\" rel=\"lightbox[521]\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-529\" src=\"https:\/\/blogs.futura-sciences.com\/frankel\/wp-content\/uploads\/sites\/7\/2016\/12\/Mount-Sharp-route.jpg\" alt=\"Le parcours suivi par Curiosity depuis son atterrissage en 2012 (en haut). Fin 2016, il roule d\u00e9sormais plein sud, avant de gravir de nouveaux s\u00e9diments lacustres (chemin propos\u00e9 en pointill\u00e9s).\" width=\"1024\" height=\"791\" srcset=\"https:\/\/blogs.futura-sciences.com\/frankel\/wp-content\/uploads\/sites\/7\/2016\/12\/Mount-Sharp-route.jpg 1024w, https:\/\/blogs.futura-sciences.com\/frankel\/wp-content\/uploads\/sites\/7\/2016\/12\/Mount-Sharp-route-450x348.jpg 450w, https:\/\/blogs.futura-sciences.com\/frankel\/wp-content\/uploads\/sites\/7\/2016\/12\/Mount-Sharp-route-768x593.jpg 768w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><figcaption id=\"caption-attachment-529\" class=\"wp-caption-text\">Le parcours suivi par Curiosity depuis son atterrissage en 2012 (en haut). Fin 2016, il roule d\u00e9sormais plein sud, avant de gravir de nouveaux s\u00e9diments lacustres (chemin propos\u00e9 en pointill\u00e9s).<\/figcaption><\/figure>\n<p>Les premi\u00e8res strates pr\u00e8s du terrain d\u2019atterrissage t\u00e9moignaient d\u2019un delta, l\u00e0 o\u00f9 des rivi\u00e8res entraient dans le lac et y d\u00e9posaient des couches de sable fin. En s\u2019\u00e9loignant de la rive du lac vers son centre, le robot se d\u00e9place sur un fond lacustre hors de port\u00e9e des sables fluviaux et o\u00f9 ne se sont d\u00e9pos\u00e9s, en eau plus profonde, que de fines argiles. L\u2019\u00e9paisseur de cette \u00ab roche de boue \u00bb qu\u2019est le mudstone est estim\u00e9e \u00e0 pr\u00e8s de 150 m\u00e8tres, et les g\u00e9ologues sont aujourd\u2019hui convaincus que le lac ne s\u2019est jamais vid\u00e9 durant toute la dur\u00e9e de ce d\u00e9p\u00f4t : un intervalle de temps qui a fort probablement dur\u00e9 plusieurs millions d\u2019ann\u00e9es, lors de la prime jeunesse de Mars (il y a environ 3,6 milliards d\u2019ann\u00e9es, avant que la plan\u00e8te rouge bascule dans une \u00e8re de s\u00e9cheresse). La vie a-t-elle eu le temps d\u2019y na\u00eetre ou de s\u2019y installer?<\/p>\n<figure id=\"attachment_530\" aria-describedby=\"caption-attachment-530\" style=\"width: 1344px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/blogs.futura-sciences.com\/frankel\/wp-content\/uploads\/sites\/7\/2016\/12\/Quela-drill-Sep-19-base-of-a-Murray-butte.jpg\" rel=\"lightbox[521]\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-530\" src=\"https:\/\/blogs.futura-sciences.com\/frankel\/wp-content\/uploads\/sites\/7\/2016\/12\/Quela-drill-Sep-19-base-of-a-Murray-butte.jpg\" alt=\"Quatorzi\u00e8me forage de la sonde (septembre 2016) alors qu'elle entreprend son quinzi\u00e8me en ce mois de d\u00e9cembre.\" width=\"1344\" height=\"1200\" srcset=\"https:\/\/blogs.futura-sciences.com\/frankel\/wp-content\/uploads\/sites\/7\/2016\/12\/Quela-drill-Sep-19-base-of-a-Murray-butte.jpg 1344w, https:\/\/blogs.futura-sciences.com\/frankel\/wp-content\/uploads\/sites\/7\/2016\/12\/Quela-drill-Sep-19-base-of-a-Murray-butte-450x402.jpg 450w, https:\/\/blogs.futura-sciences.com\/frankel\/wp-content\/uploads\/sites\/7\/2016\/12\/Quela-drill-Sep-19-base-of-a-Murray-butte-768x686.jpg 768w, https:\/\/blogs.futura-sciences.com\/frankel\/wp-content\/uploads\/sites\/7\/2016\/12\/Quela-drill-Sep-19-base-of-a-Murray-butte-1024x914.jpg 1024w\" sizes=\"auto, (max-width: 1344px) 100vw, 1344px\" \/><\/a><figcaption id=\"caption-attachment-530\" class=\"wp-caption-text\">Quatorzi\u00e8me forage de la sonde (septembre 2016) alors qu&#8217;elle entreprend son quinzi\u00e8me en ce mois de d\u00e9cembre.<\/figcaption><\/figure>\n<p>Ce 20 novembre 2016, le robot automobile a franchi la barre des 15 kilom\u00e8tres. D\u00e9but d\u00e9cembre elle est stationn\u00e9e sur les strates de la formation Murray et s\u2019appr\u00eate \u00e0 y forer un quinzi\u00e8me trou pour recueillir de nouveaux \u00e9chantillons \u00e0 analyser. Elle devrait passer une bonne partie de l\u2019ann\u00e9e \u00e0 \u00e9tudier les boues lacustres avant de reprendre son ascension de la pile centrale de s\u00e9diments o\u00f9 les analyses depuis orbite laissent pr\u00e9sager des d\u00e9p\u00f4ts lacustres tr\u00e8s diff\u00e9rentes, \u00e0 commencer par des couches riches en oxyde de fer, puis d\u2019autres argiles et enfin des sulfates. Mais la mission est d\u00e9j\u00e0 une immense r\u00e9ussite : tout ceci n\u2019est que du bonus !<\/p>\n<!-- AddThis Advanced Settings generic via filter on the_content --><!-- AddThis Share Buttons generic via filter on the_content -->","protected":false},"excerpt":{"rendered":"<p>Le robot automobile Curiosity de la NASA, avec \u00e0 son bord des instruments d\u2019analyse fran\u00e7ais, continue avec succ\u00e8s son exploration du crat\u00e8re Gale, d\u00e9but\u00e9e en ao\u00fbt 2012. Le robot roule actuellement sur le fond d\u2019un ancien lac, une argile \u00e0 grain fin (mudstone) cartographi\u00e9e sous le nom de formation Murray (en honneur au feu plan\u00e9tologue &hellip; <a href=\"https:\/\/blogs.futura-sciences.com\/frankel\/2016\/12\/04\/curiosity-lac-martien\/\" class=\"more-link\">Continuer la lecture de <span class=\"screen-reader-text\">Curiosity et son lac martien<\/span>  <span class=\"meta-nav\">&rarr;<\/span><\/a><!-- AddThis Advanced Settings generic via filter on get_the_excerpt --><!-- AddThis Share Buttons generic via filter on get_the_excerpt --><\/p>\n","protected":false},"author":6,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[13,4],"tags":[],"class_list":["post-521","post","type-post","status-publish","format-standard","hentry","category-actualites","category-sciences"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Curiosity et son lac martien - Carnets de bord d\u2019un martien, le blog de Charles FRANKEL, g\u00e9ologue<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/blogs.futura-sciences.com\/frankel\/2016\/12\/04\/curiosity-lac-martien\/\" \/>\n<meta name=\"twitter:label1\" content=\"\u00c9crit par\" \/>\n\t<meta name=\"twitter:data1\" content=\"Charles Frankel\" \/>\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\":\"WebPage\",\"@id\":\"https:\/\/blogs.futura-sciences.com\/frankel\/2016\/12\/04\/curiosity-lac-martien\/\",\"url\":\"https:\/\/blogs.futura-sciences.com\/frankel\/2016\/12\/04\/curiosity-lac-martien\/\",\"name\":\"Curiosity et son lac martien - Carnets de bord d\u2019un martien, le blog de Charles FRANKEL, g\u00e9ologue\",\"isPartOf\":{\"@id\":\"https:\/\/blogs.futura-sciences.com\/frankel\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/blogs.futura-sciences.com\/frankel\/2016\/12\/04\/curiosity-lac-martien\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/blogs.futura-sciences.com\/frankel\/2016\/12\/04\/curiosity-lac-martien\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/blogs.futura-sciences.com\/frankel\/wp-content\/uploads\/sites\/7\/2016\/12\/Murray-Buttes-selfie-18-Sep.jpg\",\"datePublished\":\"2016-12-04T18:00:23+00:00\",\"dateModified\":\"2016-12-31T11:54:17+00:00\",\"author\":{\"@id\":\"https:\/\/blogs.futura-sciences.com\/frankel\/#\/schema\/person\/c6bf521c6d19bf22fb19fb2b3d6fcf63\"},\"inLanguage\":\"fr-FR\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/blogs.futura-sciences.com\/frankel\/2016\/12\/04\/curiosity-lac-martien\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"fr-FR\",\"@id\":\"https:\/\/blogs.futura-sciences.com\/frankel\/2016\/12\/04\/curiosity-lac-martien\/#primaryimage\",\"url\":\"https:\/\/blogs.futura-sciences.com\/frankel\/wp-content\/uploads\/sites\/7\/2016\/12\/Murray-Buttes-selfie-18-Sep.jpg\",\"contentUrl\":\"https:\/\/blogs.futura-sciences.com\/frankel\/wp-content\/uploads\/sites\/7\/2016\/12\/Murray-Buttes-selfie-18-Sep.jpg\",\"width\":1024,\"height\":610,\"caption\":\"Curiosity au lieu-dit \\\"Murray Butte\\\" en septembre 2016: le fond boueux d'un ancien lac...\"},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/blogs.futura-sciences.com\/frankel\/#website\",\"url\":\"https:\/\/blogs.futura-sciences.com\/frankel\/\",\"name\":\"Carnets de bord d\u2019un martien, le blog de Charles FRANKEL, g\u00e9ologue\",\"description\":\"La science ? 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