Infrared spectroscopy of hydrous glasses of arc magma compositions

Shigeru Yamashita, Toshihiro Kitamura, Minoru Kusakabe

Research output: Contribution to journalArticle

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Abstract

Molar absorption coefficients of water in glasses of arc magma compositions have been determined for -2.8 μm, -2.2 μm, and -1.9 μm bands. Excellent agreement was found between the water contents calculated from the absorption peak heights and those determined by H2 manometry when the following molar absorption coefficients (m3/mol m) are used for different glass compositions: ε2.8μm = 6.4 ± 0.1, ε2.2μm = 0.085 ± 0.007, and ε1.9μm = 0.084 ± 0.006 for tholeiite and high-Al basalt glasses; ε2.8μm = 6.8 ± 0.1. ε2.2μm = 0.094 ± 0.006, and ε1.9μm = 0.16 ± 0.03 for dacite glass. With IR spectroscopy using these coefficients, water concentrations up to -3 wt.% in the arc basalt and dacite glasses can be determined accurately.

Original languageEnglish
Pages (from-to)169-174
Number of pages6
JournalGeochemical Journal
Volume31
Issue number3
Publication statusPublished - 1997

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infrared spectroscopy
magma
Infrared spectroscopy
arcs
glass
Glass
Chemical analysis
absorption coefficient
dacite
basalt
absorptivity
tholeiite
Water
Water content
water
moisture content
water content
spectroscopy
coefficients

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Geophysics

Cite this

Infrared spectroscopy of hydrous glasses of arc magma compositions. / Yamashita, Shigeru; Kitamura, Toshihiro; Kusakabe, Minoru.

In: Geochemical Journal, Vol. 31, No. 3, 1997, p. 169-174.

Research output: Contribution to journalArticle

Yamashita, S, Kitamura, T & Kusakabe, M 1997, 'Infrared spectroscopy of hydrous glasses of arc magma compositions', Geochemical Journal, vol. 31, no. 3, pp. 169-174.
Yamashita, Shigeru ; Kitamura, Toshihiro ; Kusakabe, Minoru. / Infrared spectroscopy of hydrous glasses of arc magma compositions. In: Geochemical Journal. 1997 ; Vol. 31, No. 3. pp. 169-174.
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