Analytical techniques for volatiles: A case study using intermediate (andesitic) glasses

Détails

ID Serval
serval:BIB_1DD61F4C626A
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Analytical techniques for volatiles: A case study using intermediate (andesitic) glasses
Périodique
American Mineralogist
Auteur(s)
King P., Vennemann T.W., Holloway J.R., Hervig R.L., Lowenstern J.B., Forneris J.F.
ISSN-L
0003-004X
Statut éditorial
Publié
Date de publication
2002
Peer-reviewed
Oui
Volume
87
Pages
1077-1089
Langue
anglais
Résumé
Small-scale analyses of volatiles in minerals and glasses provide
information on how volatiles influence high-temperature geologic
processes and low-temperature alteration processes. Four techniques for
determining the C-O-H volatile contents of andesitic glasses are
compared: manometry, secondary ion mass spectrometry, micro-Fourier
transform infrared spectroscopy, and a technique where the H2O content
is calculated using the difference between electron microprobe analysis
totals and 100% sum. We present a method to determine the H content of
a wide range of glass and mineral compositions using secondary ion mass
spectrometry and a model for calibration factors. The extinction
coefficients for H-O volatile contents in intermediate composition
synthetic glasses are determined, and it is demonstrated that C-O
speciation changes as total H2O content increases, with molecular CO2
decreasing, CO32- increasing, and carbonate peak splitting increasing.
For glasses with low H2O content and oxy-substituted minerals, the
methods of choice for volatile analysis are secondary ion mass
spectrometry or micro-Fourier transform infrared spectroscopy.
Création de la notice
29/09/2012 17:23
Dernière modification de la notice
20/08/2019 13:54
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