Models for the estimation of Fe3+/Fetot ratio in terrestrial and extraterrestrial alkali- and iron-rich silicate glasses using Raman spectroscopy
Models for the estimation of Fe3+/Fetot ratio in terrestrial and extraterrestrial alkali- and iron-rich silicate glasses using Raman spectroscopy
复制标题
使用拉曼光谱估算陆地和地外富含碱金属和铁的硅酸盐玻璃中 Fe3 /Fetot 比率的模型
DOI：
10.2138/am-2016-5534ccbyncnd
复制
发表时间：
2016
影响因子：
3.1
通讯作者：
Donald Bruce Dingwell
中科院分区：
文献类型：
--
作者：
D. Di Genova;K. Hess;Magdalena Oryaëlle Chevrel;Donald Bruce Dingwell
摘要为了使拉曼光谱成为地球科学和行星科学的定量工具，我们研究了铁的氧化态(Fe3+/FeTot)对玄武岩和闪锌矿玻璃拉曼光谱的影响。我们使用了来自Pantelleria岛的重新熔化的闪锌矿和合成的富铁玄武岩玻璃[来自Chevrel等人。(2014)]。钙钛矿玻璃的拉曼光谱表明，随着铁氧化状态的改变，光谱的高波长区(800-1200厘米-1)发生了显著的变化。特别是，随着玻璃氧化态的增加(Fe3+/Fetot比从0.24增加到0.83)，970 cm-1的能带强度增加。相比之下，玄武岩玻璃的拉曼光谱没有表现出同样的氧化态敏感性(Fe3+/Fetot比从0.15到0.79)。然而，随着铁氧化态的降低，950 cm~(-1)带向高波数方向移动。我们在这里提出了两个经验参数(对于富硅和碱的方钛矿玻璃和富铁的玄武岩玻璃)，以便能够估计无水和有水硅酸盐玻璃(高达2.4wt%H2O)的铁氧化状态。使用这些熔体样品加上一系列湿化学外部样品的独立表征，对从这些参数化导出的模型进行了验证。在SiO_2、FeO和碱的质量分数分别为69~75%、7~9%和8~11%的范围内，均可用“钙钛矿”模型来描述。玄武岩模型适用于SiO_2、FeO和碱含量分别为42-54、10-22和3-6wt%的范围内。这项研究的结果有助于扩大Di Genova等人以前提出的成分依赖数据库。(2015)，用于复杂硅酸盐玻璃的拉曼光谱。这些模型的应用范围从硅酸盐玻璃的微量分析(例如熔融包裹体)到手持的现场地面调查和极端条件下的研究，如外星(即火星)、火山和海底环境。
Abstract To develop Raman spectroscopy as a quantitative tool in both geosciences and planetary sciences the effect of iron oxidation state (Fe3+/Fetot) on the Raman spectra of basaltic and pantelleritic glasses has been investigated. We have used remelted pantellerite from Pantelleria Island and synthetic iron-rich basaltic glasses [from Chevrel et al. (2014)]. The Raman spectra of pantelleritic glasses reveal dramatic changes in the high wavelength region of the spectrum (800–1200 cm–1) as iron oxidation state changes. In particular the 970 cm–1 band intensity increases with increasing oxidation state of the glass (Fe3+/Fetot ratio from 0.24 to 0.83). In contrast, Raman spectra of the basaltic glasses do not show the same oxidation state sensitivity (Fe3+/Fetot ratio from 0.15 to 0.79). A shift, however, of the 950 cm–1 band to high wavenumber with decreasing iron oxidation state can be observed. We present here two empirical parameterizations (for silica- and alkali-rich pantelleritic glasses and for iron-rich basaltic glasses) to enable estimation of the iron oxidation state of both anhydrous and hydrous silicate glasses (up to 2.4 wt% H2O). The validation of the models derived from these parameterizations have been obtained using the independent characterization of these melt samples plus a series of external samples via wet chemistry. The “pantelleritic” model can be applied within SiO2, FeO, and alkali content ranges of ~69–75, ~7–9, and ~8–11 wt%, respectively. The “basaltic” model is valid within SiO2, FeO, and alkali content ranges of ~42–54, ~10–22, and ~3–6 wt%, respectively. The results of this study contribute to the expansion of the compositionally dependent database previously presented by Di Genova et al. (2015) for Raman spectra of complex silicate glasses. The applications of these models range from microanalysis of silicate glasses (e.g., melt inclusions) to handheld in situ terrestrial field investigations and studies under extreme conditions such as extraterrestrial (i.e., Mars), volcanic, and submarine environments.
熔体成分对硅酸盐熔体中 Fe3 /Fe2 的影响：模拟多组分系统中铁/亚铁比率的步骤
影响因子：
3.5
作者：
Borisov A;Behrens H;Holtz F.
通讯作者：
Holtz F.
影响因子：
64.8
作者：
Berry, Andrew J.;Danyushevsky, Leonid V.;Sutton, Stephen R.
通讯作者：
Sutton, Stephen R.
影响因子：
56.9
作者：
Blake, D. F.;Morris, R. V.;Sarrazin, P.
通讯作者：
Sarrazin, P.