CO2 Raman thermometer improvement: Comparing hot band and Stokes and anti-Stokes Raman scattering thermometers
CO2 Raman thermometer improvement: Comparing hot band and Stokes and anti-Stokes Raman scattering thermometers
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DOI：
10.1002/jrs.5461
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发表时间：
2018-08
影响因子：
2.5
通讯作者：
Yuuki Hagiwara;Kohei Takahata;J. Torimoto;J. Yamamoto
中科院分区：
文献类型：
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作者：
Yuuki Hagiwara;Kohei Takahata;J. Torimoto;J. Yamamoto
CO2流体包裹体普遍存在于幔源岩中。CO2拉曼密度计在深部物源和岩浆垂向系统研究中有着广泛的应用。然而，为了获得精确的CO2密度，我们还应该同时测量CO2温度，因为密度计具有温度依赖性。在这项研究中，我们使用高压光学池在15、25、35、45和55 ° C的温度下测量了密度为0.8 - 1.0 g/cm3的CO2拉曼光谱。我们提出了一个新的方程，将热带与费米二分体强度比、温度和费米二分体之间的距离（δ，cm − 1）联系起来，在所有测量条件下，该方程的精度高于以前的研究（± 3.9 - 4.7 ° C）。温度的变化引起矿物的热膨胀或热收缩，导致流体包裹体中CO2密度的变化。同时测量CO2的密度和温度将为矿物弹性性质的研究提供一种新的途径。
CO2fluid inclusions are popular in the mantle‐derived rock. CO2Raman densimeter is widely used for estimating depth provenance and magma plumbing system. However, in order to obtain precise CO2density, we should also measure CO2temperature simultaneously because the densimeter has temperature dependency. In this study, we measured CO2Raman spectra with densities of 0.8–1.0 g/cm3at temperatures of 15, 25, 35, 45, and 55°C using a high‐pressure optical cell. We propose a new equation relating hot bands to the Fermi diad intensity ratio, temperature, and distance between the Fermi diad (delta, cm−1), which has higher accuracy than those of previous studies (±3.9–4.7°C) across all measurement conditions. The change in temperature engenders thermal expansion or shrinkage of mineral, resulting in change in CO2density of fluid inclusion. Simultaneous measurement of both density and temperature of CO2will be a probe for elastic property of minerals.