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苏文,刘振先,陈菲,高静,李晓光. 2019. 构建红外光谱显微系统实验平台——原位模拟物质反应动力学过程. 岩石学报, 35(1): 252-260
构建红外光谱显微系统实验平台——原位模拟物质反应动力学过程
作者单位
苏文 中国科学院地质与地球物理研究所岩石圈演化国家重点实验室, 北京 100029 
刘振先 Institute of Materials Science and Department of Civil and Environmental Engineering, The George Washington University, Washington, DC 20052 
陈菲 中国科学院地质与地球物理研究所岩石圈演化国家重点实验室, 北京 100029 
高静 中国科学院地质与地球物理研究所岩石圈演化国家重点实验室, 北京 100029 
李晓光 中国科学院地质与地球物理研究所岩石圈演化国家重点实验室, 北京 100029 
基金项目:本文受国家自然科学基金项目(41472059、41672061)和岩石圈演化国家重点实验室自主课题联合资助.
摘要:
      本项目通过对商用布鲁克Vertex 70v真空型红外光谱仪进行拓展,来构建一套水平红外光路的系统,并与红宝石测压系统、外加温温控系统联用,适用于高压、高/低温测量的傅立叶变换红外显微系统,从而真正实现在原位条件下观察与研究地球内部物质的性质和结构特征的实验平台。在此平台上,模拟并观察在俯冲带中不同深度(温压)环境下的绿帘石红外光谱特征,同时结合拉曼光谱特征,了解晶体结构和晶体化学的稳定性、水溶解度、高压化学和高压物理学现象,从而窥视洋壳/陆壳俯冲全过程中矿物物理化学性质及其水循环的动力学演化。
英文摘要:
      This 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=11.87~12.73GPa and T=773~873K. Therefore, epidotite, as hydrous mineral, could have carried water into the mantle.
关键词:扩展  水平光路  显微傅立叶红外系统  高温高压  原位
投稿时间:2018-08-01  修订日期:2018-11-17
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黔ICP备07002071号-2
主办单位:中国矿物岩石地球化学学会
印刷版(Print): ISSN 1000-0569 网络版(Online): ISSN 2095-8927
单位地址:北京9825信箱/北京朝阳区北土城西路19号
本系统由北京勤云科技发展有限公司设计

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