{"id":2212,"date":"2017-03-07T12:49:44","date_gmt":"2017-03-07T12:49:44","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/bardintzeff\/?p=2212"},"modified":"2017-12-30T21:10:47","modified_gmt":"2017-12-30T21:10:47","slug":"la-microsonde-electronique","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/bardintzeff\/2017\/03\/07\/la-microsonde-electronique\/","title":{"rendered":"La microsonde \u00e9lectronique"},"content":{"rendered":"

Lundi 6 mars 2017, c\u2019\u00e9tait jour de microsonde ! Un passage oblig\u00e9 pour tous p\u00e9trographes et min\u00e9ralogistes.<\/p>\n

Voici ce que j\u2019\u00e9cris dans mon livre \u00ab\u00a0Volcanologue. De la passion \u00e0 la vocation\u00a0\u00bb (\u00c9d. Vuibert) \u00e0 propos de la microsonde \u00e9lectronique\u00a0:<\/p>\n

\u00ab\u00a0Cet appareil, invent\u00e9 pour la m\u00e9tallurgie, \u00e0 Orsay, par le Fran\u00e7ais Raimond Castaing, au cours des ann\u00e9es cinquante, est maintenant utilis\u00e9 mondialement et notamment en g\u00e9ologie. [II envoie un faisceau d\u2019\u00e9lectrons sur un \u00e9chantillon poli dont un volume de quelques microm\u00e8tres cubes est irradi\u00e9, cette destruction s\u2019accompagnant de l\u2019\u00e9mission d\u2019un rayonnement X, analys\u00e9 au moyen de cinq spectrom\u00e8tres]. On peut ainsi mesurer les teneurs respectives en magn\u00e9sium et fer d’une olivine, de son c\u0153ur \u00e0 sa p\u00e9riph\u00e9rie. Ensuite, par calcul, on pourra conna\u00eetre la temp\u00e9rature du magma, probablement sup\u00e9rieure \u00e0 1 100 \u00b0C, au moment de la cristallisation de ce beau min\u00e9ral vert. \u00bb<\/p>\n

Raimond Castaing (1921-1998), Acad\u00e9micien, \u00e9tait chercheur \u00e0 l\u2019Universit\u00e9 Paris-Sud Orsay, celle o\u00f9 j\u2019enseigne actuellement, et j\u2019ai eu le privil\u00e8ge de rencontrer cet homme simple et g\u00e9nial.<\/p>\n

\"\"Jacques-Marie Bardintzeff analyse des min\u00e9raux avec la microsonde \u00e9lectronique SX Five (\u201eFive\u201c car il s\u2019agit d\u2019une microsonde de cinqui\u00e8me g\u00e9n\u00e9ration) \u00e0 Camparis, Universit\u00e9 Pierre et Marie Curie, Paris VI (\u00a9 P. Wotchoko).<\/p>\n

Lundi, j\u2019ai \u00e9tudi\u00e9 des roches volcaniques du Cameroun et d\u2019\u00c9gypte.<\/p>\n

Un grand merci \u00e0 Michel Fialin et Nicolas Rividi pour leur accueil toujours amical et chaleureux.<\/p>\n","protected":false},"excerpt":{"rendered":"

Lundi 6 mars 2017, c\u2019\u00e9tait jour de microsonde ! Un passage oblig\u00e9 pour tous p\u00e9trographes et min\u00e9ralogistes. Voici ce que j\u2019\u00e9cris dans mon livre \u00ab\u00a0Volcanologue. De la passion \u00e0 la vocation\u00a0\u00bb (\u00c9d. Vuibert) \u00e0 propos de la microsonde \u00e9lectronique\u00a0: \u00ab\u00a0Cet appareil, invent\u00e9 pour la m\u00e9tallurgie, \u00e0 Orsay, par le Fran\u00e7ais Raimond Castaing, au cours des … Continuer la lecture de La microsonde \u00e9lectronique<\/span> →<\/span><\/a><\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[6],"tags":[21,85,788,789,790,360,791,544,792],"class_list":["post-2212","post","type-post","status-publish","format-standard","hentry","category-actualites","tag-bardintzeff","tag-cameroun","tag-castaing","tag-egypte","tag-microsonde-electronique","tag-mineral","tag-spectrometre","tag-universite-paris-sud-orsay","tag-universite-pierre-et-marie-curie"],"yoast_head":"\nLa microsonde \u00e9lectronique, par Jacques-Marie Bardintzeff<\/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\/bardintzeff\/2017\/03\/07\/la-microsonde-electronique\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"La microsonde \u00e9lectronique, par Jacques-Marie Bardintzeff\" \/>\n<meta property=\"og:description\" content=\"Lundi 6 mars 2017, c\u2019\u00e9tait jour de microsonde ! Un passage oblig\u00e9 pour tous p\u00e9trographes et min\u00e9ralogistes. Voici ce que j\u2019\u00e9cris dans mon livre \u00ab\u00a0Volcanologue. De la passion \u00e0 la vocation\u00a0\u00bb (\u00c9d. 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