顕微FT-IR反射分光法による斑晶ガラス包有物の含水量測定

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(2) ½µ. =). ,*+* 2 E , F& ,*++ - E 2 F. FT-IR Micro Reflectance Measurements of Water Content in Melt Inclusions Atsushi YASUDA῍ A technique based on micro reflectance spectroscopy using a vacuum Furier Transform infrared (FT-IR) spectrometer has developed for the quantitative measurement of dissolved water in melt inclusions in phenocrysts. The technique is superior in sample preparation to the conventional transmission method, which requires doubly polished samples with known thickness. Four synthesized glass samples with H,O contents ranging +.+1 to ..*/ wt῍ were examined in this study. A linear correlation between the logarithm of reflectance intensities around -0/* cm+ by H-bearing species and the water content of the glasses is obtained. At the lateral resolution of -* mm, the precision of the measurement caused by random error is *.,- wt῍ (+s), and the value is low enough to apply the technique to the measurement of dissolved water in melt inclusions. A method which corrects possible contamination of inclusion spectra by the olivine host is also proposed. Key words : FTIR, reflectance measurement, melt inclusion, olivine contamination +ῌ ῐ ῎ ῑ ῏. AB& <GHIJKLMLNOPQ RS. TUS VWVXYZLN[\ ]. ^_àb cde^& H,O fghNi. jk

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(190) | F_ ¹º»r&¬1d¼>' §½>`. ῌῑῐ῍ Bureau, H., Metrich, N., Pineau, F. and Semet, M.P. (+332) Magma-conduit interaction at Piton de la Fournaise volcano (Reunion Island) : a melt and fluid inclusion study. J. Volcanol. Geotherm. Res., 2., -3῍0*. Dixon, J.E., Stolper, E.M., Holloway, J.R. (+33/) An experimental study of water and carbon dioxide solubilities in Mid-Ocean Ridge Basaltic liquids. Part I : Calibration and solubility models. J. Petrol., -0, +0*1῍ +0-+. Duke, D.A. and Stephens, J.D. (+30.) Infrared investigations of the olivine group minerals, Amer. Mineral., .3, +-22῍+.*0. Fine, G. and Stolper E. (+320) Dissolved carbon dioxide in basaltic glasses : concentrations ans speciation, Earth Planet. Sci. Lett., 10, ,0-῍,12. GH (+301) 13 I .-,p. Grzechnik, A., Zimmermann, H.D., Hervig, R.L., King, P. L. and McMillan, P.F. (+330) FTIR micro-reflectance measurements of the CO-, ion content in basaltic and leucitie glasses. Contrib. Mineral. Petrol., +,/, -++῍-+2. Hervig, R.L., Mazdab, F.K., Moore, G. and McMillan, P. F. (,**-) Analyzing hydrogen (H,O) in silicate glass by secondary ion mass spectrometry and reflectance Fourier transform infrared spectroscopy. in Melt inclusions in volcanic systems : methods, applications and problems (De Vino, B. and Bodnar R. J. eds), 2-῍+*-, Elsevier, Amsterdam. Larsen, J.F. (,**2) Heterogeneous bubble nucleation and disequilibrium H,* exsolution in Vesuvius K-phonolite melts, J. Volcanol. Geotherm. Res., +1/, ,12῍,22. Luhr, J.F. (,**+) Glass inclusions and melt volatile contents at Paricutin Volcano. Mexico. Contrib. Mineral. Petrol., +.,, ,0+῍,2-. Metrich, N., Bertagnini, A., Landy, P. and Rosi, M. (,**+) Crystallization Driven By Decompression and Water Loss at Stromboli Volcano (Aeolin Islands, Italy). J. Petrol., .,, +.1.῍+.3*. Moore, G., Chizmeshya, A. and McMillan, P.F. (,***) Calibration of a reflectance FTIR method for determination of dissolved CO, concentration in rhyolitic glasses. Goechim. Coscmoshim. Acta., 0., -/1+῍-/13. Nichols, A.R.L. and Wysoczanski, R. J. (,**1) Using.

(191) FT-IR

(192) micro-FTIR spectroscopy to measure volatile contents in small and unexposed inclusions hosted in olivine crystals. Chem. Geol., ,.,, -1+ῌ-2.. Roggensack, K., Hervig, R.L., Mcknight, S.B., Williams, S. N. (+331) Explosive basaltic volcanism from Cerro Negro volcano : influence of volatiles on eruptive style. Science, ,11, +0-3ῌ+0.,. Saito, G., Kazahaya, K., Shinohara, H., Stimac, J. and Kawanabe, Y. (,**+) Variation of volatile concentration in a magma system of Satsuma-Iwojima volcano deduced from melt inclusion analyses. J. Volcanol. Geotherm. Res., +*2, ++ῌ-+.. 49. Silver, L.A., Ihinger, P.D. and Stolper, E.M. (+33*) The influence of bulk composition on the speciation of water in silicate glasses, Contrib. Mineral. Petrol., +*., +.,ῌ+0,. Stolper, E.M. (+32,) Water in silicate glasses : an infrared spectroscopic study. Contrib. Mineral. Petrol., 2+, +ῌ+1. (+33.) FT-IR !"#$% & , ' ()* +,- ,-*p. Wallace, P. J. (,**/) Volatiles in subduction zone magmas : concentrations and fluxes based on melt inclusion and volcanic gas data. J. Volcanol. Geotherm. Res., +.*, ,+1ῌ ,.*. ./01 23 4.

(193)