ANALYTICAL TECHNIQUES FOR VOLATILES: A CASE STUDY USING INTERMEDIATE (ANDESITIC) GLASSES
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dc.contributor.author | King P.L. | |
dc.contributor.author | Vennemann T.W. | |
dc.contributor.author | Holloway J.R. | |
dc.contributor.author | Hervig R.L. | |
dc.contributor.author | Lowenstern J.B. | |
dc.contributor.author | Forneris J.F. | |
dc.date.accessioned | 2021-10-16T12:26:11Z | |
dc.date.available | 2021-10-16T12:26:11Z | |
dc.date.issued | 2002 | |
dc.identifier | https://elibrary.ru/item.asp?id=32151362 | |
dc.identifier.citation | American Mineralogist, 2002, 87, 8-9, 1077-1089 | |
dc.identifier.issn | 0003-004X | |
dc.identifier.uri | https://repository.geologyscience.ru/handle/123456789/30758 | |
dc.description.abstract | 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. | |
dc.title | ANALYTICAL TECHNIQUES FOR VOLATILES: A CASE STUDY USING INTERMEDIATE (ANDESITIC) GLASSES | |
dc.type | Статья |
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