Development of a new method to measure volatile content in small volcanic glasses
| Project/Area Number |
23654182
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Petrology/Mineralogy/Science of ore deposit
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| Research Institution | The University of Tokyo |
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Principal Investigator |
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| Project Period (FY) |
2011 – 2013
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| Project Status |
Completed (Fiscal Year 2013)
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| Budget Amount *help |
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2013: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2012: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2011: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
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| Keywords | マグマ / FTIR / 含水量 / 顕微分析 / メルト包有物 / ガラス包有物 / 顕微FTIR / 反射法 / 班晶 / 斑晶 / 顕微赤外分光 / 反射スペクトル |
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| Research Abstract |
A method to quantify water content in small volcanic glasses has been developed. The technique uses Fourier transform infrared (FT-IR) micro reflectance spectroscopy, and thus does not require a doubly polished sample. For standards, we synthesized 32 glasses with different water concentrations ranging from basaltic to rhyolitic composition. An empirical relationship was established between total water contents and the negative peak heights of reflectance spectra. To apply the technique to natural samples of various shapes, we developed a method to correct the spectrum of melt inclusion contaminated with host minerals. As a result, the water content now can be quantified with reasonable accuracy (< 0.3 wt%) for melt inclusions having diameter as small as 20 micron with a typical measuring time of 22 min.
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Report
(4 results)
Research Products
(20 results)
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[Journal Article] Yuki Suzuki, Atsushi Yasuda, Natsumi Hokanishi, Takayuki Kaneko, Setsuya Nakada, Toshitsugu Fujii, Jun-ichi Hirabayashi2013
Author(s)
Yuki Suzuki, Atsushi Yasuda, Natsumi Hokanishi, Takayuki Kaneko, Setsuya Nakada, Toshitsugu Fujii, Jun-ichi Hirabayashi
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Journal Title
JVGR
Volume: 未定
Pages: 184-204
DOI
Related Report
Peer Reviewed
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