{"id":6066,"date":"2024-10-26T17:01:13","date_gmt":"2024-10-26T17:01:13","guid":{"rendered":"https:\/\/nantes.apbg.org\/?p=6066"},"modified":"2025-09-29T07:10:56","modified_gmt":"2025-09-29T07:10:56","slug":"le-samedi-18-janvier-2025-assemblee-pleniere-et-conference","status":"publish","type":"post","link":"https:\/\/nantes.apbg.fr\/index.php\/2024\/10\/26\/le-samedi-18-janvier-2025-assemblee-pleniere-et-conference\/","title":{"rendered":"Le samedi 18 janvier 2025 : Assembl\u00e9e pl\u00e9ni\u00e8re et conf\u00e9rence"},"content":{"rendered":"\n<figure class=\"wp-block-image alignright size-full is-resized\"><a href=\"https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/yves-Lagabrielle.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"566\" height=\"584\" src=\"https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/yves-Lagabrielle.jpg\" alt=\"\" class=\"wp-image-6898\" style=\"width:256px;height:auto\" srcset=\"https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/yves-Lagabrielle.jpg 566w, https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/yves-Lagabrielle-291x300.jpg 291w\" sizes=\"auto, (max-width: 566px) 100vw, 566px\" \/><\/a><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Le samedi 18 janvier 2025 a eu lieu l&rsquo;assembl\u00e9e pl\u00e9ni\u00e8re de notre r\u00e9gionale suivie d&rsquo;une conf\u00e9rence sur<strong> \u00ab&nbsp;La d\u00e9couverte du fonctionnement des dorsales lentes : 40 ann\u00e9es de recherche terre-mer&nbsp;\u00bb<\/strong> <strong>par Yves Lagabrielle<\/strong>, directeur de recherche au CNRS et affect\u00e9 \u00e0 l\u2019UMR G\u00e9osciences Rennes. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">2h en compagnie de Yves Lagabrielle pour remonter le temps depuis 1840 et (re)d\u00e9couvrir la fantastique histoire de la d\u00e9couverte des dorsales. Un grand moment surtout quand on comprend comment 30 ans de laborieux travaux de terrain ont \u00e9t\u00e9 n\u00e9cessaires pour prouver que le manteau terrestre n\u2019a pas comme devenir de rester sous la cro\u00fbte mais peut tr\u00e8s bien \u00eatre exhum\u00e9 au niveau des zones de divergence ; ce que ne pr\u00e9voyait pas la tectonique des plaques !<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Gr\u00e2ce \u00e0 leurs travaux <a><\/a>de recherche sur les ophiolites alpines et sur l\u2019observation des dorsales, Yves Lagabrielle et ses collaborateurs ont pu ouvrir les yeux de la communaut\u00e9 scientifique sur la r\u00e9alit\u00e9 des dorsales lentes et faire \u00e9voluer le cadre global de la th\u00e9orie de la tectonique.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Alors un immense merci \u00e0 monsieur Lagabrielle pour \u00eatre venu \u00e0 Nantes partager avec nous cet exemple remarquable de d\u00e9marche scientifique sur le long terme. La science avance et c\u2019est aussi gr\u00e2ce aux g\u00e9ologues de terrain !<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Retrouvez le diaporama de la conf\u00e9rence dans <a href=\"https:\/\/ent-apbg.org\/index.php?ctrl=offline&amp;_idSpaceAccess=4&amp;objUrl=%3Fctrl%3Dfile%26typeId%3DfileFolder-1714%26typeIdChild%3Dfile-15018\" target=\"_blank\" rel=\"noreferrer noopener\">l&rsquo;ENT de l&rsquo;APBG<\/a><\/strong><\/p>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-default is-cropped wp-block-gallery-1 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/473321617_1503121490367540_293307036322024927_n-scaled.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"455\" data-id=\"6909\" src=\"https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/473321617_1503121490367540_293307036322024927_n-1024x455.jpg\" alt=\"\" class=\"wp-image-6909\" srcset=\"https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/473321617_1503121490367540_293307036322024927_n-1024x455.jpg 1024w, https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/473321617_1503121490367540_293307036322024927_n-300x133.jpg 300w, https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/473321617_1503121490367540_293307036322024927_n-768x341.jpg 768w, https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/473321617_1503121490367540_293307036322024927_n-1536x683.jpg 1536w, https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/473321617_1503121490367540_293307036322024927_n-2048x910.jpg 2048w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/473221341_1503121170367572_7700683486970589637_n.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"574\" data-id=\"6908\" src=\"https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/473221341_1503121170367572_7700683486970589637_n-1024x574.jpg\" alt=\"\" class=\"wp-image-6908\" srcset=\"https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/473221341_1503121170367572_7700683486970589637_n-1024x574.jpg 1024w, https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/473221341_1503121170367572_7700683486970589637_n-300x168.jpg 300w, https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/473221341_1503121170367572_7700683486970589637_n-768x431.jpg 768w, https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/473221341_1503121170367572_7700683486970589637_n-1536x861.jpg 1536w, https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/473221341_1503121170367572_7700683486970589637_n.jpg 2048w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><figcaption class=\"wp-element-caption\">D\u00e9but des recherches en 1980 avec les ophiolites alpines \u00ab\u00a0anormales\u00a0\u00bb par rapport au dogme de la Penrose Conference sur les ophiolites en 1972.<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/473611149_1503120990367590_494255516649043674_n.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"577\" data-id=\"6911\" src=\"https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/473611149_1503120990367590_494255516649043674_n-1024x577.jpg\" alt=\"\" class=\"wp-image-6911\" srcset=\"https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/473611149_1503120990367590_494255516649043674_n-1024x577.jpg 1024w, https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/473611149_1503120990367590_494255516649043674_n-300x169.jpg 300w, https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/473611149_1503120990367590_494255516649043674_n-768x432.jpg 768w, https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/473611149_1503120990367590_494255516649043674_n-1536x865.jpg 1536w, https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/473611149_1503120990367590_494255516649043674_n.jpg 2048w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><figcaption class=\"wp-element-caption\">2 difficult\u00e9s pour les ophiolites alpines : une faible \u00e9paisseur (quelques kilom\u00e8tres seulement) et pour les ophiolites incompl\u00e8tes (schistes bleus) des s\u00e9diments oc\u00e9aniques reposant sur tous les \u00e9l\u00e9ments de l&rsquo;ophiolite.<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/474255393_1503121283700894_2641415799918264467_n.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"574\" data-id=\"6894\" src=\"https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/474255393_1503121283700894_2641415799918264467_n-1024x574.jpg\" alt=\"\" class=\"wp-image-6894\" srcset=\"https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/474255393_1503121283700894_2641415799918264467_n-1024x574.jpg 1024w, https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/474255393_1503121283700894_2641415799918264467_n-300x168.jpg 300w, https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/474255393_1503121283700894_2641415799918264467_n-768x431.jpg 768w, https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/474255393_1503121283700894_2641415799918264467_n-1536x861.jpg 1536w, https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/474255393_1503121283700894_2641415799918264467_n.jpg 2048w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><figcaption class=\"wp-element-caption\">Plong\u00e9e en 1981 sur le banc de Gorringe pour valider le mod\u00e8le d&rsquo;ophiolite \u00ab\u00a0sans cro\u00fbte\u00a0\u00bb gr\u00e2ce \u00e0 l&rsquo;observation au fond de l&rsquo;oc\u00e9an d&rsquo;un manteau directement \u00e0 l&rsquo;affleurement et des produits de d\u00e9mant\u00e8lement des ophiolites.<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/473727280_1503121097034246_2244708290503802655_n.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"576\" data-id=\"6913\" src=\"https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/473727280_1503121097034246_2244708290503802655_n-1024x576.jpg\" alt=\"\" class=\"wp-image-6913\" srcset=\"https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/473727280_1503121097034246_2244708290503802655_n-1024x576.jpg 1024w, https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/473727280_1503121097034246_2244708290503802655_n-300x169.jpg 300w, https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/473727280_1503121097034246_2244708290503802655_n-768x432.jpg 768w, https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/473727280_1503121097034246_2244708290503802655_n-1536x863.jpg 1536w, https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/473727280_1503121097034246_2244708290503802655_n.jpg 2048w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><figcaption class=\"wp-element-caption\">Publication dans Nature en 1982 des observations de Yves Lagabrielle. Une r\u00e9volution.<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/473727970_1503121310367558_1350239903529967852_n.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"544\" data-id=\"6914\" src=\"https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/473727970_1503121310367558_1350239903529967852_n-1024x544.jpg\" alt=\"\" class=\"wp-image-6914\" srcset=\"https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/473727970_1503121310367558_1350239903529967852_n-1024x544.jpg 1024w, https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/473727970_1503121310367558_1350239903529967852_n-300x159.jpg 300w, https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/473727970_1503121310367558_1350239903529967852_n-768x408.jpg 768w, https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/473727970_1503121310367558_1350239903529967852_n-1536x816.jpg 1536w, https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/473727970_1503121310367558_1350239903529967852_n.jpg 2048w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><figcaption class=\"wp-element-caption\">Bien au sud des A\u00e7ores, vers 15\u00b020 (loin de la zone d&rsquo;\u00e9tude de Le Pichon en 1972) : observation de nombreux d\u00f4mes d&rsquo;exhumation, les OCC (Oceanic Core-Complex). Des failles normales tr\u00e8s peu pent\u00e9es permettent d&rsquo;exhumer du manteau \u00ab\u00a0\u00e0 sec\u00a0\u00bb.<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/473383225_1503121470367542_6658668072896056772_n.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"680\" data-id=\"6910\" src=\"https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/473383225_1503121470367542_6658668072896056772_n-1024x680.jpg\" alt=\"\" class=\"wp-image-6910\" srcset=\"https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/473383225_1503121470367542_6658668072896056772_n-1024x680.jpg 1024w, https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/473383225_1503121470367542_6658668072896056772_n-300x199.jpg 300w, https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/473383225_1503121470367542_6658668072896056772_n-768x510.jpg 768w, https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/473383225_1503121470367542_6658668072896056772_n-1536x1019.jpg 1536w, https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/473383225_1503121470367542_6658668072896056772_n.jpg 2048w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><figcaption class=\"wp-element-caption\">3 mod\u00e8les amagmatiques d&rsquo;extension oc\u00e9anique selon les lieux oc\u00e9aniques.<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/473740589_1503121390367550_5780174317321038359_n.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"630\" data-id=\"6893\" src=\"https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/473740589_1503121390367550_5780174317321038359_n-1024x630.jpg\" alt=\"\" class=\"wp-image-6893\" srcset=\"https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/473740589_1503121390367550_5780174317321038359_n-1024x630.jpg 1024w, https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/473740589_1503121390367550_5780174317321038359_n-300x184.jpg 300w, https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/473740589_1503121390367550_5780174317321038359_n-768x472.jpg 768w, https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/473740589_1503121390367550_5780174317321038359_n-1536x944.jpg 1536w, https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/473740589_1503121390367550_5780174317321038359_n.jpg 2048w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/473639819_1503371587009197_6849461528303831484_n.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"650\" data-id=\"6912\" src=\"https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/473639819_1503371587009197_6849461528303831484_n-1024x650.jpg\" alt=\"\" class=\"wp-image-6912\" srcset=\"https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/473639819_1503371587009197_6849461528303831484_n-1024x650.jpg 1024w, https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/473639819_1503371587009197_6849461528303831484_n-300x190.jpg 300w, https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/473639819_1503371587009197_6849461528303831484_n-768x488.jpg 768w, https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/473639819_1503371587009197_6849461528303831484_n-1536x975.jpg 1536w, https:\/\/nantes.apbg.fr\/wp-content\/uploads\/2025\/09\/473639819_1503371587009197_6849461528303831484_n.jpg 2048w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><figcaption class=\"wp-element-caption\">Merci Monsieur Lagabrielle<\/figcaption><\/figure>\n<\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Le samedi 18 janvier 2025 a eu lieu l&rsquo;assembl\u00e9e pl\u00e9ni\u00e8re de notre r\u00e9gionale suivie d&rsquo;une conf\u00e9rence sur \u00ab&nbsp;La d\u00e9couverte du<\/p>\n","protected":false},"author":1,"featured_media":6894,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"colormag_page_container_layout":"default_layout","colormag_page_sidebar_layout":"default_layout","footnotes":""},"categories":[5],"tags":[],"class_list":["post-6066","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-conference"],"_links":{"self":[{"href":"https:\/\/nantes.apbg.fr\/index.php\/wp-json\/wp\/v2\/posts\/6066","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/nantes.apbg.fr\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/nantes.apbg.fr\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/nantes.apbg.fr\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/nantes.apbg.fr\/index.php\/wp-json\/wp\/v2\/comments?post=6066"}],"version-history":[{"count":1,"href":"https:\/\/nantes.apbg.fr\/index.php\/wp-json\/wp\/v2\/posts\/6066\/revisions"}],"predecessor-version":[{"id":6916,"href":"https:\/\/nantes.apbg.fr\/index.php\/wp-json\/wp\/v2\/posts\/6066\/revisions\/6916"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/nantes.apbg.fr\/index.php\/wp-json\/wp\/v2\/media\/6894"}],"wp:attachment":[{"href":"https:\/\/nantes.apbg.fr\/index.php\/wp-json\/wp\/v2\/media?parent=6066"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/nantes.apbg.fr\/index.php\/wp-json\/wp\/v2\/categories?post=6066"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/nantes.apbg.fr\/index.php\/wp-json\/wp\/v2\/tags?post=6066"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}