{"id":3022,"date":"2021-12-24T00:14:12","date_gmt":"2021-12-24T00:14:12","guid":{"rendered":"http:\/\/hebergement.universite-paris-saclay.fr\/brigaud\/?page_id=3022"},"modified":"2021-12-24T01:05:24","modified_gmt":"2021-12-24T01:05:24","slug":"annee-2012-projet-insu-cnrs-tellus-cessur","status":"publish","type":"page","link":"https:\/\/hebergement.universite-paris-saclay.fr\/brigaud\/recherche\/programmes-scientiques\/archives\/annee-2012-projet-insu-cnrs-tellus-cessur\/","title":{"rendered":"Ann\u00e9e 2012: projet INSU-CNRS Tellus-CESSUR"},"content":{"rendered":"\n

AGEFLUO \u2013 AGE et nature des circulations de fluides \u00e0 l\u2019origine de min\u00e9ralisations \u00e9conomiques de FLUOrine (CaF2) dans un bassin intracratonique (Sud-Est du Bassin de Paris, France)<\/em> <\/p>\n\n\n\n

financement INSU<\/a> 2012, appel d\u2019offre CESSUR \u2013 Connaissance et Technologie du Sous-Sol pour son Exploitation et Usage Durable<\/strong><\/a>.<\/p>\n\n\n\n

Responsable scientifique: Benjamin Brigaud<\/a><\/p>\n\n\n\n

Dur\u00e9e 1 an, ann\u00e9e: 2012<\/p>\n\n\n\n

Ce projet vise \u00e0 dater les \u00e9pisodes des circulations de fluides \u00e0 l\u2019origine de min\u00e9ralisations \u00e9conomiques (CaF2<\/sub>) dans la partie Sud-Est du Bassin de Paris et \u00e0 contraindre leur nature. Dans les ann\u00e9es 1960-1970, d\u2019importantes recherches de min\u00e9ralisations ont \u00e9t\u00e9 entreprises et ont permis de reconna\u00eetre des r\u00e9serves importantes en Bourgogne. Ces travaux d\u2019exploration ont mis en \u00e9vidence des gisements stratiformes localis\u00e9s le long des bordures du Morvan, \u00e0 la base de la s\u00e9rie s\u00e9dimentaire m\u00e9sozoique remplissant le Bassin de Paris. Ces gisements constituent une des r\u00e9serves en CaF2<\/sub> les plus importantes d\u2019Europe, avec une estimation de r\u00e9serves d\u2019environ 7 Mt de CaF2<\/sub> (Soul\u00e9 de Lafont et Lh\u00e9gu, 1980). Cependant, il est important de noter que tr\u00e8s peu d\u2019\u00e9tudes ayant examin\u00e9 et document\u00e9 l\u2019origine de la mise en place des gisements stratiformes fran\u00e7ais ont \u00e9t\u00e9 r\u00e9alis\u00e9es depuis presque 30 ans (th\u00e8se de Nigon, 1988, Sizaret, 2002). Nos connaissances sur ces gisements sont donc tr\u00e8s parcellaires, et non mises \u00e0 jour au regard des nouvelles m\u00e9thodes g\u00e9ochimiques et tout particuli\u00e8rement isotopiques. Par exemple, les datations radiochronologiques K\/Ar effectu\u00e9es au cours des ann\u00e9es 70-80 ont uniquement \u00e9t\u00e9 r\u00e9alis\u00e9es sur les gisements filoniens du Massif central, et aucune datation radiochronologique n\u2019existe sur les fluorines des gisements stratiformes.<\/p>\n\n\n\n

L\u2019objectif principal de ce travail est donc d\u2019examiner les gisements stratiformes de fluorine de la bordure Sud-Est du Bassin de Paris et d\u2019essayer de comprendre et conceptualiser leur origine. Ce travail devra permettre de mieux conceptualiser le fonctionnement des syst\u00e8mes pal\u00e9o-hydrologiques, les interactions fluides\/roches du Bassin de Paris, et leur r\u00f4le dans les m\u00e9canismes de min\u00e9ralisations en fluorine. Le volet principal de cette \u00e9tude portera sur la caract\u00e9risation g\u00e9ochimique (spectres des \u00e9l\u00e9ments des terres rares, isotopes Sm-Nd) des min\u00e9ralisations afin de tracer les sources des pal\u00e9ofluides et de les dater au travers de deux m\u00e9thodes compl\u00e9mentaires Sm-Nd et (U-Th)\/He. Le but sera d\u2019essayer, en int\u00e9grant les p\u00e9riodes des pal\u00e9ocirculations, de fournir un mod\u00e8le m\u00e9tallog\u00e9nique des d\u00e9p\u00f4ts de fluorine dans le Bassin de Paris.<\/p>\n\n\n\n

Ce projet couvre les th\u00e8mes \u00ab action bassins s\u00e9dimentaires \u00bb et \u00ab ressources min\u00e9rales \u00bb, mis en avant dans l\u2019appel \u00e0 projet CESSUR. La fluorine \u00e9tant class\u00e9e dans les \u00e9l\u00e9ments critiques par la Commission Europ\u00e9enne de l\u2019Industrie (European Commission, 2010), ce projet se trouve \u00e0 l\u2019interface des mondes acad\u00e9miques et industriels. Il sera d\u00e9velopper en concertation avec les services \u00ab G\u00e9ologie \u00bb, \u00ab Ressources min\u00e9rales \u00bb et \u00ab M\u00e9trologie, monitoring, analyses \u00bb du Brgm qui assure le financement d\u2019une bourse de th\u00e8se.<\/p>\n\n\n\n

Equipe scientifique: Benjamin Brigaud (McF, s\u00e9dimentologue), Guillaume Delpech (McF, g\u00e9ochimiste), Maurice Pagel (Pr, min\u00e9ralogiste), Rosella Pinna (Ing\u00e9nieur, G\u00e9ochimiste)<\/p>\n\n\n\n

Etudiante en th\u00e8se sur ce projet: Morgane Gigoux<\/p>\n\n\n\n

Publications<\/strong><\/p>\n\n\n\n

Gigoux, M., Brigaud, B., Pagel, M., Delpech, G<\/strong>., Guerrot, C., Aug\u00e9, T., N\u00e9grel, P., 2016. Genetic constraints on world-class carbonate- and siliciclastic-hosted stratabound fluorite deposits in Burgundy (France) inferred from mineral paragenetic sequence and fluid inclusion studies. Ore Geology Reviews<\/a>. 72, 940-962 news INSU-CNRS<\/a><\/p>\n\n\n\n

Gigoux, M., Delpech, G.<\/strong>, Guerrot, C., Pagel, M<\/strong>., Aug\u00e9, T., N\u00e9grel, P., Brigaud, B.<\/strong>, 2015. Evidence for an Early Cretaceous mineralizing event above the basement\/sediment unconformity in the intracratonic Paris Basin : paragenetic sequence and Sm-Nd dating of the world-class Pierre-Perthuis stratabound fluorite deposit. Mineralium Deposita<\/a>. 50, 455-463 news U-PSUD<\/a><\/p>\n\n\n\n

Abstract de congr\u00e8s \u00e0 comit\u00e9 de lecture<\/strong><\/p>\n\n\n\n

Gigoux, M.<\/strong>, N\u00e9grel, P., Guerrot, C., Brigaud, B<\/strong>., Delpech, G., Pagel, M.<\/strong>, Aug\u00e9, T., 2015. \u03b444Ca of Stratabound Fluorite Deposits in Burgundy (France) : Tracing Fluid Origin and\/or Fractionation Processes. Procedia Earth and Planetary Science<\/a>. 13, 129-133<\/p>\n\n\n\n

Gigoux, M<\/strong>., Brigaud, B<\/strong>., Delpech, G., Pagel, M<\/strong>., Guerrot, C., Auge, T., Negrel, P. 2013. Stratiform fluorite deposits in the south-eastern part of the Paris basin (Morvan)\u00a0: paragenetic sequence, trace elements and Sr-Nd isotopes. Proceedings of the 12th Biennial SGA Meeting<\/a>, 12\u201315 August 2013, Uppsala, Sweden, Vol 2, 620-623<\/p>\n","protected":false},"excerpt":{"rendered":"

AGEFLUO \u2013 AGE et nature des circulations de fluides \u00e0 l\u2019origine de min\u00e9ralisations \u00e9conomiques de FLUOrine (CaF2) dans un bassin intracratonique (Sud-Est du Bassin de Paris, France) financement INSU 2012, appel d\u2019offre CESSUR \u2013 Connaissance et Technologie du Sous-Sol pour son Exploitation et Usage Durable. Responsable scientifique: Benjamin Brigaud Dur\u00e9e 1 an, ann\u00e9e: 2012 Ce […]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":3013,"menu_order":4,"comment_status":"closed","ping_status":"closed","template":"","meta":{"ngg_post_thumbnail":0,"footnotes":""},"class_list":["post-3022","page","type-page","status-publish","hentry","post-preview"],"yoast_head":"\nAnn\u00e9e 2012: projet INSU-CNRS Tellus-CESSUR - benjamin brigaud<\/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:\/\/hebergement.universite-paris-saclay.fr\/brigaud\/recherche\/programmes-scientiques\/archives\/annee-2012-projet-insu-cnrs-tellus-cessur\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Ann\u00e9e 2012: projet INSU-CNRS Tellus-CESSUR - benjamin brigaud\" \/>\n<meta property=\"og:description\" content=\"AGEFLUO \u2013 AGE et nature des circulations de fluides \u00e0 l\u2019origine de min\u00e9ralisations \u00e9conomiques de FLUOrine (CaF2) dans un bassin intracratonique (Sud-Est du Bassin de Paris, France) financement INSU 2012, appel d\u2019offre CESSUR \u2013 Connaissance et Technologie du Sous-Sol pour son Exploitation et Usage Durable. 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