Micro-Raman Densimeter for CO<sub>2</sub> Inclusions in Mantle-Derived Minerals
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- Yoko Kawakami
- Laboratory for Earthquake Chemistry, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
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- Junji Yamamoto
- Laboratory for Earthquake Chemistry, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
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- Hiroyuki Kagi
- Laboratory for Earthquake Chemistry, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
書誌事項
- 公開日
- 2003-11
- 権利情報
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- https://journals.sagepub.com/page/policies/text-and-data-mining-license
- DOI
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- 10.1366/000370203322554473
- 公開者
- SAGE Publications
この論文をさがす
説明
<jats:p> We investigated the applicability of Raman microprobe spectroscopy for determining the density of CO<jats:sub>2</jats:sub> in fluid inclusions in minerals of mantle-derived xenolith samples. A separation (Δ) between two Raman bands of CO<jats:sub>2</jats:sub> due to Fermi resonance can be a reliable densimeter for CO<jats:sub>2</jats:sub> fluid. The relationship between the density of CO<jats:sub>2</jats:sub> (g/cm<jats:sup>3</jats:sup>) and Δ(cm<jats:sup>−1</jats:sup>) can be expressed as: d = −0.03238697Δ<jats:sup>3</jats:sup> + 10.08428Δ<jats:sup>2</jats:sup> – 1046.189Δ + 36163.67. This equation was obtained from the Raman data on CO<jats:sub>2</jats:sub> fluid with densities from 0.1 to 1.21 g/cm<jats:sup>3</jats:sup>, including super critical fluids at 58–59 °C. The Δ value was constant with increasing temperature from room temperature to 200 °C. This indicates that the Raman densimeter is not affected by a possible rise in temperature, an artifact induced by the high flux of the incident laser. The minimum size of measurable inclusions is 1 μm, and the precision in the determination of Δ is 0.1 cm<jats:sup>−1</jats:sup>, corresponding to 0.02 g/cm<jats:sup>3</jats:sup> for inclusions of 1 μm in size. The precision can be better for larger inclusions. The micro-Raman densimeter can determine the density of CO<jats:sub>2</jats:sub> fluid inclusions over a wide range. In particular, densities of gas and mixtures of gas and liquid phases, which cannot be measured by microthermometry, can be determined. </jats:p>
収録刊行物
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- Applied Spectroscopy
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Applied Spectroscopy 57 (11), 1333-1339, 2003-11
SAGE Publications
