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X-WR-CALDESC:Évènements pour Laboratoire Magmas et Volcans
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DTSTART:20180325T010000
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DTSTART:20181028T010000
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TZNAME:CEST
DTSTART:20190331T010000
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DTSTART:20191027T010000
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BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20191001T093000
DTEND;TZID=Europe/Paris:20191001T120000
DTSTAMP:20260504T171204
CREATED:20190401T093455Z
LAST-MODIFIED:20190401T093455Z
UID:17596-1569922200-1569931200@lmv.uca.fr
SUMMARY:Comité de direction
DESCRIPTION:
URL:https://lmv.uca.fr/agenda/comite-de-direction-18/
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BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20191003T140000
DTEND;TZID=Europe/Paris:20191003T160000
DTSTAMP:20260504T171204
CREATED:20190827T130613Z
LAST-MODIFIED:20190910T113610Z
UID:20031-1570111200-1570118400@lmv.uca.fr
SUMMARY:Séminaire de Marie-Noelle Guilbaud
DESCRIPTION:Titre: L’histoire fascinante des dômes rhyolitiques à grenats de Las Derrumbadas (Mexique)
URL:https://lmv.uca.fr/agenda/seminaire-de-marie-noelle-guilbaud/
CATEGORIES:Séminaire
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BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20191004T110000
DTEND;TZID=Europe/Paris:20191004T120000
DTSTAMP:20260504T171204
CREATED:20191003T094329Z
LAST-MODIFIED:20191003T094329Z
UID:20741-1570186800-1570190400@lmv.uca.fr
SUMMARY:VolcaPot missions de l'été
DESCRIPTION:Ce VolcaPot sera consacré aux huit missions de l’été : \n\nSurveillance du dôme du Merapi : Karim\nGravi temporelle au Piton de la Fournaise : Anne\, Lydie\, Quentin\nMultigaz et magnétisme aéroporté au Piton de la Fournaise : Lydie\, Philippe\nCoulées de laves du PdF : Oryaëlle\, Lydie\, Anne\nKarthala : Carole\, Lucia\nChaîne des Puys : Solène\, Philippe\nLombok : Ben\nGéophysique sur le champs géothermiques de Nesjavellir : Lydie\, Philippe\, Thierry\, Solène
URL:https://lmv.uca.fr/agenda/volcapot-missions-de-lete/
LOCATION:LMV: salle des séminaires
CATEGORIES:VolcaPot
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20191009T140000
DTEND;TZID=Europe/Paris:20191009T170000
DTSTAMP:20260504T171204
CREATED:20191002T073844Z
LAST-MODIFIED:20191002T073904Z
UID:20725-1570629600-1570640400@lmv.uca.fr
SUMMARY:Visite des 3 doctorants de l'Université de Tohoku
DESCRIPTION:Nous recevons trois doctorants de l’université de\nTohoku. Des présentations sont programmées mercredi 9-octobre en salle des\nséminaires. \n14h00 – 14h40 Yongsheng Huang « Experimental constraints on dihedral angle\nand electrical conductivity between the olivine and aqueous fluid in the\nsubduction zones” \n14h40 – 15h10 Wakana Fujita « Effect of micro-structural evolution on fluid\nmigration in polycrystalline aggregates” \n15h10 – 15h40 Naoki Araya « Magma migration to a shallow conduit prior to\nPlinian eruptions at Sakurajima volcano” \nMerci de leur faire bon accueil et de venir nombreux assister à leurs\nprésentations.
URL:https://lmv.uca.fr/agenda/visite-des-3-doctorants-de-luniversite-de-tohoku/
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BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20191015T090000
DTEND;TZID=Europe/Paris:20191015T120000
DTSTAMP:20260504T171204
CREATED:20190401T093358Z
LAST-MODIFIED:20190903T081627Z
UID:17593-1571130000-1571140800@lmv.uca.fr
SUMMARY:Conseil de laboratoire
DESCRIPTION:
URL:https://lmv.uca.fr/agenda/conseil-de-laboratoire-6/
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BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20191018T180000
DTEND;TZID=Europe/Paris:20191018T200000
DTSTAMP:20260504T171204
CREATED:20191003T072637Z
LAST-MODIFIED:20191003T072637Z
UID:20736-1571421600-1571428800@lmv.uca.fr
SUMMARY:Soutenance de thèse de Swetha Venugopal
DESCRIPTION:Swetha Venugopal soutiendra sa thèse le vendredi 18\noctobre à 9h (heure locale de Vancouver ; 18h à Clermont) dans la salle\nn°2020 à la bibliothèque de l’Université Simon Fraser (Vancouver\, Canada). \nVous trouverez\nci-dessous le titre et le résumé de la thèse. \nTitre : From magmatic sources to volcanic gas emissions: insight from the\nGaribaldi Volcanic Belt\, western Canada \nJury: \nDirector: Tim Druitt (UCA)\nDirectrice: Severine Moune (UCA)\nDirector: Glyn Williams-Jones (SFU) \nExaminatrice: Gwenn Flowers (SFU)\nExaminatrice: Nathalie Vigouroux-Callibiot (Douglas College) \nRapporteur: Brendan Dyck (SFU)\nRapporteur: Jacob Lowenstern (USGS) \nRésumé: \nVolcanoes are the surficial representation of the complex interplay of\nmagmatic\, crustal\, and hydrothermal processes operating below the Earth’s\nsurface. Studying volcanic deposits provides a unique snapshot into the\ncomposition of the deep mantle source. Melt inclusions\, which are small\npockets of magma trapped inside growing crystals\, preserve multi-faceted\nrecords of magma petrogenesis. Additionally\, the magma at depth contains a\nsignificant proportion of dissolved magmatic gases. Once these gases\nbecome saturated in the magma\, they exsolve into a separate vapour phase\nand ascend quickly to the surface\, where they are released as volcanic\ngases. The composition of gases at the surface can provide valuable\ninsight into the composition of the magma at depth\, as well as the\nshallow-level hydrothermal system. Volcanic gases are an important factor\ncontrolling whether an eruption is gentle and effusive\, or violent and\nexplosive. A greater amount of gas that separates at depth can trigger\nlarge\, explosive eruptions (Devine et al.\, 1998; Shinohara\, 2008).\nTherefore\, gas detection at the surface is an essential monitoring tool\nfor eruption forecasting. In this thesis\, I begin with an in-depth look\ninside glassy and crystallized olivine-hosted melt inclusions and assess\nthe nature of micron-scale solid phases occupying the vapour bubble. From\nhere\, major\, volatile and trace element compositions of olivine-hosted\nmelt inclusions from every centre along the Garibaldi Volcanic Belt (GVB)\nreveals a north to south transition from an enriched mantle signature\, to\na subduction-modified depleted mantle source. Finally\, the recent\nre-discovery of fumaroles beneath the summit glacier of Mount Meager has\nprompted the first MultiGAS survey in the GVB. The plumes are H2S\, CO2 and\nH2O rich\, and hot enough to melt through the overlying ice. Can the\nbasaltic magma\, represented by melt inclusions\, produce the volcanic gases\ncurrently emitted at the surface? To test this\, two different gas\nmodelling software (SolEx and MagmaSat) are used\, along with original and\nrecalculated (with the bubble components) as input parameters. The\nresulting molar ratios are compared with MultiGAS ratios of fumaroles.\nOverall\, SolEx closed-system degassing using recalculated melt inclusions\nyields the best approximation to MultiGAS ratios. This thesis addresses a\ncompositional knowledge gap within the GVB. By understanding both the\ndistinct magmatic sources underlying the arc\, as well as the composition\nof volcanic gases emanating from summit fumaroles\, we gain a broad and\ncomprehensive geochemical overview of the Garibaldi Volcanic Belt.
URL:https://lmv.uca.fr/agenda/soutenance-de-these-de-swetha-venugopal/
ATTACH;FMTTYPE=image/jpeg:https://lmv.uca.fr/wp-content/uploads/2019/10/Swetha-Defence-poster.jpg
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