{"id":2147,"date":"2024-02-25T10:45:25","date_gmt":"2024-02-25T09:45:25","guid":{"rendered":"https:\/\/svt-dalaine.fr\/svt\/?page_id=2147"},"modified":"2024-11-06T19:41:12","modified_gmt":"2024-11-06T18:41:12","slug":"st-d-les-deformations-de-la-lithosphere","status":"publish","type":"page","link":"https:\/\/svt-dalaine.fr\/svt\/st-d-les-deformations-de-la-lithosphere\/","title":{"rendered":"ST-D- Les d\u00e9formations de la lithosph\u00e8re"},"content":{"rendered":"\t\t
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Extrait du B.O.:<\/p>

La lithosph\u00e8re, enveloppe externe de la partie solide de la Terre, est une enveloppe qui se d\u00e9forme sous l\u2019effet de forces impos\u00e9es par la dynamique interne. Cette d\u00e9formation d\u00e9pend de la rh\u00e9ologie des mat\u00e9riaux qui la composent selon les conditions de pression et de temp\u00e9rature. Ces d\u00e9formations sont \u00e0 mettre en \u00e9vidence \u00e0 partir d\u2019observations de l\u2019\u00e9chelle de l’\u00e9chantillon \u00e0 celle de la lithosph\u00e8re (observations g\u00e9ophysiques). Ces
observations permettent de construire un mod\u00e8le physique du comportement m\u00e9canique de la lithosph\u00e8re, qui permet d\u2019expliquer la construction de la topographie et les ph\u00e9nom\u00e8nes sismiques.
L\u2019\u00e9tude de la sismogen\u00e8se est l\u2019occasion de d\u00e9tailler un mode de d\u00e9formation de la lithosph\u00e8re, \u00e0 partir de mesures de d\u00e9formations actives aujourd\u2019hui pour, in fine, faire le lien avec l\u2019appr\u00e9hension d’un al\u00e9a et la compr\u00e9hension d\u2019un risque (d\u00e9velopp\u00e9 dans la partie ST-I sur les risques). Les s\u00e9ismes, comme marqueurs actifs de la d\u00e9formation cassante, constituent une donn\u00e9e clef ayant nourri les r\u00e9flexions aboutissant \u00e0 la th\u00e9orie de la tectonique des plaques. Les d\u00e9finitions de la lithosph\u00e8re introduites en ST1-A sont compl\u00e9t\u00e9es par les aspects rh\u00e9ologiques. Cette partie est l\u2019occasion d\u2019expliquer l\u2019expression de surface de la dynamique interne de la Terre.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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\n\t\t\t\n\t\t\t\t\t\t\n\t\t\t\t\t\tST-D-1 La rh\u00e9ologie de la lithosph\u00e8re<\/span>\n\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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\n\t\t\t\n\t\t\t\t\t\t\n\t\t\t\t\t\tST-D-2 Les s\u00e9ismes: origine et cons\u00e9quences<\/span>\n\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"

Extrait du B.O.: La lithosph\u00e8re, enveloppe externe de la partie solide de la Terre, est une enveloppe qui se d\u00e9forme sous l\u2019effet de forces impos\u00e9es par la dynamique interne. Cette d\u00e9formation d\u00e9pend de la rh\u00e9ologie des mat\u00e9riaux qui la composent… Lire la suite<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"categories":[],"tags":[],"class_list":["post-2147","page","type-page","status-publish","hentry"],"yoast_head":"\nST-D- Les d\u00e9formations de la lithosph\u00e8re - Bienvenue sur le site de Sciences de la Vie et de la Terre<\/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:\/\/svt-dalaine.fr\/svt\/st-d-les-deformations-de-la-lithosphere\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"ST-D- Les d\u00e9formations de la lithosph\u00e8re - Bienvenue sur le site de Sciences de la Vie et de la Terre\" \/>\n<meta property=\"og:description\" content=\"Extrait du B.O.: La lithosph\u00e8re, enveloppe externe de la partie solide de la Terre, est une enveloppe qui se d\u00e9forme sous l\u2019effet de forces impos\u00e9es par la dynamique interne. 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