Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/932
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dc.contributor.authorallHeide, K.; Institute of Geosciences, University of Jena, Germanyen
dc.contributor.authorallSchmidt, C. M.; Institute of Geosciences, University of Jena, Germanyen
dc.date.accessioned2006-02-22T15:03:07Zen
dc.date.available2006-02-22T15:03:07Zen
dc.date.issued2005en
dc.identifier.urihttp://hdl.handle.net/2122/932en
dc.description.abstractVolatile components in magma strongly influence many physical properties of melts and minerals. The temperature resolved degassing analysis of volcanic crystalline and vitreous rocks gives detailed information about volatile compounds in the melt. Aspecial high-temperature mass-spectrometry device in combination with a thermo-balance allows a quantitative determination of different volatile species. It enables a differentiation between the primary gas content in the magma and the gas released from decomposition of secondary alteration products. The gas release profiles give the following indications: i) during the littoral explosions of Pahoehoe lava the content of volatiles is not changed by interaction with air or sea water; ii) the degassing profiles of vitreous black sand verify the primary content of volatiles in the erupted melt, only CO2 was detected; iii) the oxygen release profile gives significant indications for oxygen undersaturation of the erupted magma; iv) remelting of black sand in air at 1450°C for 0.45 h causes an oxygen saturation of the basaltic melt; v) remelting of black sand in argon atmosphere confirms the oxygen undersaturation of the melt; vi) remelting of black sand-black shale mixtures affects a significant change in the degassing profiles, especially in CO2-release. With the first investigations we can demonstrate that gas release curves of volcanic rocks are qualified for a) detection of the primary gas content of erupted magma; b) detection of alteration processes of the igneous glass; c) detection of contamination of the magma with adjacent rocks.en
dc.format.extent1763865 bytesen
dc.format.mimetypeapplication/pdfen
dc.language.isoEnglishen
dc.publisher.nameINGVen
dc.relation.ispartofAnnals of Geophysicsen
dc.relation.ispartofseries4-5/48 (2005)en
dc.subjectvolatilesen
dc.subjectmagmatic rocksen
dc.subjectbasaltic glassen
dc.subjectdegassingen
dc.subjectHawaiian lavaen
dc.subjectremeltingen
dc.subjectblacksanden
dc.titleDetermination of volatiles in volcanic rocks and minerals with a Directly Coupled Evolved Gas Analyzing System (DEGAS) -Part I: Interpretation of degassing profiles (DEGAS-profiles) of minerals and rocks on the basis of melting experimentsen
dc.typearticleen
dc.description.statusPublisheden
dc.type.QualityControlPeer-revieweden
dc.subject.INGV04. Solid Earth::04.08. Volcanology::04.08.01. Gasesen
dc.subject.INGV04. Solid Earth::04.08. Volcanology::04.08.03. Magmasen
dc.description.journalTypeJCR Journalen
dc.description.fulltextopenen
dc.contributor.authorHeide, K.en
dc.contributor.authorSchmidt, C. M.en
dc.contributor.departmentInstitute of Geosciences, University of Jena, Germanyen
dc.contributor.departmentInstitute of Geosciences, University of Jena, Germanyen
item.openairetypearticle-
item.cerifentitytypePublications-
item.languageiso639-1en-
item.grantfulltextopen-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.fulltextWith Fulltext-
crisitem.author.deptInstitute of Geosciences, University of Jena, Germany-
crisitem.author.deptInstitute of Geosciences, University of Jena, Germany-
crisitem.classification.parent04. Solid Earth-
crisitem.classification.parent04. Solid Earth-
Appears in Collections:Annals of Geophysics
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