{"id":283,"date":"2013-01-28T19:39:58","date_gmt":"2013-01-28T18:39:58","guid":{"rendered":"http:\/\/wp.unil.ch\/geoblog\/?p=283"},"modified":"2018-12-04T14:28:35","modified_gmt":"2018-12-04T13:28:35","slug":"seismic-atlas-of-the-swiss-molasse-basin","status":"publish","type":"post","link":"https:\/\/wp.unil.ch\/geoblog\/2013\/01\/seismic-atlas-of-the-swiss-molasse-basin\/","title":{"rendered":"Seismic Atlas of the Swiss Molasse Basin"},"content":{"rendered":"<p><img loading=\"lazy\" decoding=\"async\" class=\"alignleft size-full wp-image-393\" src=\"https:\/\/wp.unil.ch\/geoblog\/files\/2013\/01\/seismic_atlas_couv.jpeg\" alt=\"seismic_atlas_couv\" width=\"231\" height=\"300\" \/>Le Plateau suisse, essentiellement occup\u00e9 par un bassin molassique, couvre environ un tiers de la superficie du pays. Pour la premi\u00e8re fois, le <em><strong>Seismic Atlas of the Swiss Molasse Basin<\/strong><\/em> pr\u00e9sente un mod\u00e8le g\u00e9ologique en 3D de la structure profonde du sous-sol sous le Plateau, du Lac L\u00e9man au Lac de Constance, entre le Jura et les Alpes (Figure 1). Il a \u00e9t\u00e9 r\u00e9alis\u00e9 \u00e0 partir de l\u2019analyse r\u00e9gionale de plus de 4300 km profils sismiques (Figure 2) et d\u2019une trentaine de forages profonds (Figure 3); la plupart de ces donn\u00e9es ont \u00e9t\u00e9 obtenues par l\u2019industrie p\u00e9troli\u00e8re.<br \/>\n<!--more--><\/p>\n<div style=\"width: 640px;\" class=\"wp-video\"><video class=\"wp-video-shortcode\" id=\"video-283-1\" width=\"640\" height=\"360\" poster=\"https:\/\/av.unil.ch\/hva\/1592\/sasmb-twtanimation-part1and2_hd.png\" controls=\"controls\"><source type=\"video\/mp4\" src=\"https:\/\/av.unil.ch\/hva\/1592\/sasmb-twtanimation-part1and2_hd.mp4?_=1\" \/><source type=\"video\/webm\" src=\"https:\/\/av.unil.ch\/hva\/1592\/sasmb-twtanimation-part1and2_hd.webm?_=1\" \/><a href=\"https:\/\/av.unil.ch\/hva\/1592\/sasmb-twtanimation-part1and2_hd.mp4\">https:\/\/av.unil.ch\/hva\/1592\/sasmb-twtanimation-part1and2_hd.mp4<\/a><\/video><\/div>\n<span class=\"wp-caption-text\">Parts 1 and 2 of the animation presenting the two-way travel time (TWT) data from the SASMB.<br \/>\nPart 1 shows an example of interpreted seismic section and an overview of the data for the entire Swiss Molasse Basin.<br \/>\nPart 2 shows the TWT layers for each horizon individually, and gives a more close-up view of respectively the western and eastern part of the Swiss Molasse Basin.<\/span><\/p>\n<hr \/>\n<div style=\"width: 640px;\" class=\"wp-video\"><video class=\"wp-video-shortcode\" id=\"video-283-2\" width=\"640\" height=\"360\" poster=\"https:\/\/av.unil.ch\/hva\/1592\/sasmb-depthanimation_hd.png\" controls=\"controls\"><source type=\"video\/mp4\" src=\"https:\/\/av.unil.ch\/hva\/1592\/sasmb-depthanimation_hd.mp4?_=2\" \/><source type=\"video\/webm\" src=\"https:\/\/av.unil.ch\/hva\/1592\/sasmb-depthanimation_hd.webm?_=2\" \/><a href=\"https:\/\/av.unil.ch\/hva\/1592\/sasmb-depthanimation_hd.mp4\">https:\/\/av.unil.ch\/hva\/1592\/sasmb-depthanimation_hd.mp4<\/a><\/video><\/div>\n<span class=\"wp-caption-text\">Animation presenting the data from the SASMB in depth. The animation shows an overview of the entire Swiss Molasse Basin, a close-up view of a well (Pfaffnau-1), the depth layers of each seismic horizon individually, as well as a more close-up view of respectively the western and eastern part of the Swiss Molasse Basin.<\/span><\/p>\n<hr \/>\n<p>L\u2019Atlas se compose d\u2019un texte d\u2019environ 80 pages et les r\u00e9sultats qui en d\u00e9coulent sont illustr\u00e9s dans 24 planches hors-texte. Il contient notamment 13 grandes coupes perpendiculaires au bassin (Figure 4 et 5) et deux selon sa direction principale. Un mod\u00e8le structural en 3D du bassin a \u00e9t\u00e9 cr\u00e9\u00e9 \u00e0 partir de ces coupes (Figure 6).<\/p>\n<div id='gallery-1' class='gallery galleryid-283 gallery-columns-3 gallery-size-thumbnail'><figure class='gallery-item'>\n\t\t\t<div class='gallery-icon portrait'>\n\t\t\t\t<a href='https:\/\/wp.unil.ch\/geoblog\/files\/2013\/01\/Seismic_Atlas_page_titre_Fig01.jpeg'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/wp.unil.ch\/geoblog\/files\/2013\/01\/Seismic_Atlas_page_titre_Fig01-150x150.jpeg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" aria-describedby=\"gallery-1-294\" srcset=\"https:\/\/wp.unil.ch\/geoblog\/files\/2013\/01\/Seismic_Atlas_page_titre_Fig01-150x150.jpeg 150w, https:\/\/wp.unil.ch\/geoblog\/files\/2013\/01\/Seismic_Atlas_page_titre_Fig01-160x160.jpeg 160w, https:\/\/wp.unil.ch\/geoblog\/files\/2013\/01\/Seismic_Atlas_page_titre_Fig01-320x320.jpeg 320w\" sizes=\"auto, (max-width: 150px) 100vw, 150px\" \/><\/a>\n\t\t\t<\/div>\n\t\t\t\t<figcaption class='wp-caption-text gallery-caption' id='gallery-1-294'>\n\t\t\t\tFig. 1 Page de titre de l\u2019Atlas. La carte indique la position des grandes coupes verticales \u00e0 travers le Plateau \u00e9tablies \u00e0 partir de profils sismiques. Les trois panneaux montrent des extraits des coupes. De gauche \u00e0 droite : profil sismique brut, profil interpr\u00e9t\u00e9 (avec un forage profond) et profil g\u00e9ologique apr\u00e8s conversion en profondeur.\n\t\t\t\t<\/figcaption><\/figure><figure class='gallery-item'>\n\t\t\t<div class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/wp.unil.ch\/geoblog\/files\/2013\/01\/Atlas_Lignes_sismiques_Fig02.png'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/wp.unil.ch\/geoblog\/files\/2013\/01\/Atlas_Lignes_sismiques_Fig02-150x150.png\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" aria-describedby=\"gallery-1-291\" srcset=\"https:\/\/wp.unil.ch\/geoblog\/files\/2013\/01\/Atlas_Lignes_sismiques_Fig02-150x150.png 150w, https:\/\/wp.unil.ch\/geoblog\/files\/2013\/01\/Atlas_Lignes_sismiques_Fig02-160x160.png 160w, https:\/\/wp.unil.ch\/geoblog\/files\/2013\/01\/Atlas_Lignes_sismiques_Fig02-320x320.png 320w\" sizes=\"auto, (max-width: 150px) 100vw, 150px\" \/><\/a>\n\t\t\t<\/div>\n\t\t\t\t<figcaption class='wp-caption-text gallery-caption' id='gallery-1-291'>\n\t\t\t\tFig. 2 Positions des lignes sismiques en Suisse, au nord des Alpes. Environ 50% de profils situ\u00e9s sur le Plateau ont \u00e9t\u00e9 utilis\u00e9s pour \u00e9tablir l\u2019Atlas.\n\t\t\t\t<\/figcaption><\/figure><figure class='gallery-item'>\n\t\t\t<div class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/wp.unil.ch\/geoblog\/files\/2013\/01\/Atlas_puits_Fig03.png'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/wp.unil.ch\/geoblog\/files\/2013\/01\/Atlas_puits_Fig03-150x150.png\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" aria-describedby=\"gallery-1-292\" srcset=\"https:\/\/wp.unil.ch\/geoblog\/files\/2013\/01\/Atlas_puits_Fig03-150x150.png 150w, https:\/\/wp.unil.ch\/geoblog\/files\/2013\/01\/Atlas_puits_Fig03-160x160.png 160w, https:\/\/wp.unil.ch\/geoblog\/files\/2013\/01\/Atlas_puits_Fig03-320x320.png 320w\" sizes=\"auto, (max-width: 150px) 100vw, 150px\" \/><\/a>\n\t\t\t<\/div>\n\t\t\t\t<figcaption class='wp-caption-text gallery-caption' id='gallery-1-292'>\n\t\t\t\tFig. 3 Tableau r\u00e9capitulatif des principaux forages profonds utilis\u00e9s pour l\u2019Atlas. Ces forages ont permis de faire le lien entre les profils sismiques et la g\u00e9ologie. \n\t\t\t\t<\/figcaption><\/figure><figure class='gallery-item'>\n\t\t\t<div class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/wp.unil.ch\/geoblog\/files\/2013\/01\/Seismic-Atlas_TR_Fig04.png'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/wp.unil.ch\/geoblog\/files\/2013\/01\/Seismic-Atlas_TR_Fig04-150x150.png\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" aria-describedby=\"gallery-1-293\" \/><\/a>\n\t\t\t<\/div>\n\t\t\t\t<figcaption class='wp-caption-text gallery-caption' id='gallery-1-293'>\n\t\t\t\tFig. 4 Exemple de coupe g\u00e9ologique situ\u00e9e approximativement entre le Lac de Neuch\u00e2tel au NW (\u00e0 gauche) et les Pr\u00e9alpes au SE (\u00e0 droite). Les s\u00e9diments de l\u2019unit\u00e9 tertiaire (Molasse, en jaune) surmontent des s\u00e9diments d\u2019\u00e2ge m\u00e9sozo\u00efque (bleu \u00e0 orange) qui eux-m\u00eames reposent sur des roches d\u2019\u00e2ge permo-carbonif\u00e8re (brun clair) ou sur du socle cristallin encore plus ancien (en rose).\n\t\t\t\t<\/figcaption><\/figure><figure class='gallery-item'>\n\t\t\t<div class='gallery-icon portrait'>\n\t\t\t\t<a href='https:\/\/wp.unil.ch\/geoblog\/files\/2013\/01\/Atlas_13coupes_Fig05.png'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/wp.unil.ch\/geoblog\/files\/2013\/01\/Atlas_13coupes_Fig05-150x150.png\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" aria-describedby=\"gallery-1-290\" srcset=\"https:\/\/wp.unil.ch\/geoblog\/files\/2013\/01\/Atlas_13coupes_Fig05-150x150.png 150w, https:\/\/wp.unil.ch\/geoblog\/files\/2013\/01\/Atlas_13coupes_Fig05-160x160.png 160w, https:\/\/wp.unil.ch\/geoblog\/files\/2013\/01\/Atlas_13coupes_Fig05-320x320.png 320w\" sizes=\"auto, (max-width: 150px) 100vw, 150px\" \/><\/a>\n\t\t\t<\/div>\n\t\t\t\t<figcaption class='wp-caption-text gallery-caption' id='gallery-1-290'>\n\t\t\t\tFig. 5 Vue synoptique des grandes coupes perpendiculaires au bassin molassique suisse. On observe l\u2019important l\u2019\u00e9paississement de la Molasse (en jaune) en direction des Alpes (\u00e0 droite sur la figure). Les unit\u00e9s d\u2019\u00e2ge m\u00e9sozo\u00efque (de couleur bleu \u00e0 orange) sont plus \u00e9paisses \u00e0 l\u2019ouest (par exemple sur les coupes No. 1 et 3) qu\u2019\u00e0 l\u2019est (par exemple sur la coupe No. 13).\n\t\t\t\t<\/figcaption><\/figure><figure class='gallery-item'>\n\t\t\t<div class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/wp.unil.ch\/geoblog\/files\/2013\/01\/Seismic-Atlas_figure_3D_Fig06.png'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/wp.unil.ch\/geoblog\/files\/2013\/01\/Seismic-Atlas_figure_3D_Fig06-150x150.png\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" aria-describedby=\"gallery-1-295\" srcset=\"https:\/\/wp.unil.ch\/geoblog\/files\/2013\/01\/Seismic-Atlas_figure_3D_Fig06-150x150.png 150w, https:\/\/wp.unil.ch\/geoblog\/files\/2013\/01\/Seismic-Atlas_figure_3D_Fig06-160x160.png 160w\" sizes=\"auto, (max-width: 150px) 100vw, 150px\" \/><\/a>\n\t\t\t<\/div>\n\t\t\t\t<figcaption class='wp-caption-text gallery-caption' id='gallery-1-295'>\n\t\t\t\tFig. 6 Aper\u00e7u en 3D de trois horizons g\u00e9ologiques cartographi\u00e9s sous le Plateau suisse : base de la Molasse, sommet de l\u2019unit\u00e9 du Dogger (d\u2019\u00e2ge jurassique) et base de l\u2019unit\u00e9 d\u2019\u00e2ge m\u00e9sozo\u00efque.\n\t\t\t\t<\/figcaption><\/figure>\n\t\t<\/div>\n\n<p>La connaissance du sous-sol sous le Plateau, est importante non seulement pour son int\u00e9r\u00eat scientifique, mais aussi pour ses nombreuses applications pratiques comme par exemple, l\u2019\u00e9tablissement de cartes du risque sismique, l\u2019\u00e9valuation des ressources en \u00e9nergie g\u00e9othermique, l\u2019identification des circulations profondes de l\u2019eau, la caract\u00e9risation des r\u00e9gions favorables pour la s\u00e9questration du CO2, la reconnaissance de structures pouvant accueillir des d\u00e9chets nucl\u00e9aires ou encore la recherche d\u2019hydrocarbures.<\/p>\n<blockquote class=\"alignleft\"><p>Publi\u00e9 fin 2012 par le Service g\u00e9ologique national (swisstopo), on peut le commander chez\u00a0<a href=\"https:\/\/www.toposhop.admin.ch\/fr\/shop\/products\/publications\/geology\/geophysics\">toposhop<\/a>.<\/p><\/blockquote>\n<p>L\u2019Atlas a \u00e9t\u00e9 r\u00e9alis\u00e9 des Dr Anna Sommaruga et Urs Eichenberger sous la direction du prof. Fran\u00e7ois Marillier au sein de l\u2019Institut de g\u00e9ophysique de l\u2019UNIL (qui fait maintenant partie du CRET). De nombreuses autres personnes ont aussi contribu\u00e9 \u00e0 sa r\u00e9alisation.\u00a0Il a \u00e9t\u00e9 \u00e9dit\u00e9 par le prof. E. Kissling de la Commission suisse de g\u00e9ophysique, commission qui l&rsquo;a financ\u00e9 avec l\u2019aide de la Facult\u00e9 des g\u00e9osciences et de l\u2019environnement.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Le Plateau suisse, essentiellement occup\u00e9 par un bassin molassique, couvre environ un tiers de la superficie du pays. Pour la premi\u00e8re fois, le Seismic Atlas of the Swiss Molasse Basin pr\u00e9sente un mod\u00e8le g\u00e9ologique en 3D de la structure profonde du sous-sol sous le Plateau, du Lac L\u00e9man au Lac de Constance, entre le Jura [&hellip;]<\/p>\n","protected":false},"author":47,"featured_media":1145,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_seopress_robots_primary_cat":"","_seopress_titles_title":"","_seopress_titles_desc":"","_seopress_robots_index":"","footnotes":"","_links_to":"","_links_to_target":""},"categories":[66905],"tags":[67005],"class_list":{"0":"post-283","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-recherche-en-action","8":"tag-francois-marillier"},"_links":{"self":[{"href":"https:\/\/wp.unil.ch\/geoblog\/wp-json\/wp\/v2\/posts\/283","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wp.unil.ch\/geoblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/wp.unil.ch\/geoblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/wp.unil.ch\/geoblog\/wp-json\/wp\/v2\/users\/47"}],"replies":[{"embeddable":true,"href":"https:\/\/wp.unil.ch\/geoblog\/wp-json\/wp\/v2\/comments?post=283"}],"version-history":[{"count":0,"href":"https:\/\/wp.unil.ch\/geoblog\/wp-json\/wp\/v2\/posts\/283\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/wp.unil.ch\/geoblog\/wp-json\/wp\/v2\/media\/1145"}],"wp:attachment":[{"href":"https:\/\/wp.unil.ch\/geoblog\/wp-json\/wp\/v2\/media?parent=283"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wp.unil.ch\/geoblog\/wp-json\/wp\/v2\/categories?post=283"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wp.unil.ch\/geoblog\/wp-json\/wp\/v2\/tags?post=283"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}