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

• 安田 敦

  東京大学地震研究所物質科学研究部門

書誌事項

タイトル別名

• FT-IR Micro Reflectance Measurements of Water Content in Melt Inclusions
• ケンビFT IR ハンシャ ブンコウホウ ニ ヨル ハンショウガラス ホウユウブツ ノ ガン スイリョウ ソクテイ

抄録

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 H₂O contents ranging 1.17 to 4.05wt% were examined in this study. A linear correlation between the logarithm of reflectance intensities around 3650cm^-1by H-bearing species and the water content of the glasses is obtained. At the lateral resolution of 30μm, the precision of the measurement caused by random error is 0.23wt% (1σ), 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.

収録刊行物

• 火山

  火山 56 (2-3), 41-49, 2011

  特定非営利活動法人 日本火山学会

キーワード

• FTIR
• reflectance measurement
• melt inclusion
• olivine contamination

詳細情報

• CRID: 1390001204303204352
• NII論文ID: 110008687460
• NII書誌ID: AN10512786
• DOI: 10.18940/kazan.56.2-3_41
• ISSN: 21897182
• ISSN: 04534360
• NDL書誌ID: 11184234
• Web Site: http://id.ndl.go.jp/bib/11184234
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I11184234
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • NDL
  • CiNii Articles
  • KAKEN
• 抄録ライセンスフラグ: 使用不可