流体包裹体压力计研究之一:高温高压下Na_2SO_4溶液的拉曼光谱  

STUDY OF PRESSURE GAUGE FOR FLUID INCLUSIONS: RAMAN SPECTROSCOPY OF NA_2SO_4SOLUTION AT HIGH TEMPERATURE AND HIGH PRESSURE

作　　者：乔二伟[1] 段体玉[1] 郑海飞[1] 

机构地区：[1]造山带与地壳演化教育部重点实验室,北京大学地球与空间科学学院,北京100871

出　　处：《矿物学报》2006年第1期89-92,共4页Acta Mineralogica Sinica

基　　金：国家自然科学基金重大项目(批准号:10299040);国家自然科学基金资助项目(批准号:40173019);博士点基金资助项目(资助号:20030001053)

摘　　要：用金刚石压腔研究了Na2S04溶液在温度30—400℃、压力90—2400MPa条件下的拉曼光谱特征。结果表明：温度相同时，SO4^2-的对称伸缩振动随压力增大向高频方向偏移；而在压力基本相同时，随温度升高则向低频方向偏移。经过数据拟合得到了SO4^2-对称伸缩振动的拉曼位移与温度、压力的关系为：ρ=190.44△vp＋0．0027t^2＋2．9019t-111．68。该公式可以用来作为流体包裹体的压力计。The Raman spectroscopy of Na2SO4 sulution was conducted in a diamond anvil cell at temperatures fwm 30 to 400℃ and pressures from 90 to 2400 MPa. The result showed that at the consistent temperature the SO4^2- symmetric stretching vibration shifted to higher wavenumbers with increasing pressure, and at the consistent pressure it shifted to lower wavenumbers with the rise of temperature. Moreover, we obtained an equation ρ=190.44△vp＋0.0027t^2＋2.9019t-111.68 as the correlation between temperature and pressure and Raman shift of the SO4^2- symmetric stretching vibration by fitting the data, and the equation can be used as a pressure gauge of fluid inclusions.

关 键 词：金刚石压腔 高温 高压 拉曼光谱 Na2SO4溶液 流体包裹体 压力计 

分 类 号：O521[理学—高压高温物理] P579[理学—物理]