IGGCAS OpenIR  > 岩石圈演化国家重点实验室
Construction of FT-IR micro-spectroscopy system: In situ studies on reaction-dynamics of material
Su Wen1; Liu ZhenXian2,3; Chen Fei1; Gao Jing1; Li XiaoGuang1
AbstractThis project is to develop a custom in-situ infrared (IR) microscope for high-pressure and high/low temperature FT-IR studies on Bruker Vertex 70v vacuum FT-IR spectrometer. This microscope system is specially designed with horizontal IR beam together with a ruby pressure calibration system and a temperature control system of external heater, an ideal platform for in-situ high-pressure and high/low temperature IR spectroscopic research on the properties and structures of the materials in the deep interiors of planets. High pressure and temperature IR spectra of epidote were obtained with this experimental platform to simulate and investigate its structure and water solubility under condition of the different temperature and pressure during subduction, together with mineral chemical characteristics and Raman data, to look insight into the dynamic evolution of mineral' s physicochemical property and water cycle in the whole process of subduction. The data of epidote on IR spectroscopic and Raman spectroscopic research in-situ under high-pressure and high temperature show that the structure of the epidote remained stable, while temperature increasing from room temperature to 873K, pressure from 0. 1GPa to 11. 87GPa. In particular, the M-O bond with weak compressibility of the epidote is related to the substitution of Fe-Al on the octahedron. OH vibration spectrums in infrared spectrum are sudden increase and disappearance, which maybe related to redox of Fe. Our results demonstrate that epidotite can be stable at least within the range of P = 11. 87 similar to 12. 73GPa and T = 773 similar to 873 K. Therefore, epidotite, as hydrous mineral, could have carried water into the mantle.
KeywordExtension The level of IR light source Micro-FT-IR HT-HP In situ
WOS Research AreaGeology
WOS SubjectGeology
WOS IDWOS:000456937400020
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Document Type期刊论文
Corresponding AuthorSu Wen
Affiliation1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
2.George Washington Univ, Inst Mat Sci, Washington, DC 20052 USA
3.George Washington Univ, Dept Civil & Environm Engn, Washington, DC 20052 USA
Recommended Citation
GB/T 7714
Su Wen,Liu ZhenXian,Chen Fei,et al. Construction of FT-IR micro-spectroscopy system: In situ studies on reaction-dynamics of material[J]. ACTA PETROLOGICA SINICA,2019,35(1):252-260.
APA Su Wen,Liu ZhenXian,Chen Fei,Gao Jing,&Li XiaoGuang.(2019).Construction of FT-IR micro-spectroscopy system: In situ studies on reaction-dynamics of material.ACTA PETROLOGICA SINICA,35(1),252-260.
MLA Su Wen,et al."Construction of FT-IR micro-spectroscopy system: In situ studies on reaction-dynamics of material".ACTA PETROLOGICA SINICA 35.1(2019):252-260.
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