拉曼光谱方法测量流体包裹体的内压及其应用

通过金刚石压腔和显微激光拉曼光谱方法,获得了流体包裹体中H2O-NaCl体系的O—H、碳酸根的C—O、硫酸根的S—O和正庚烷-环己烷的C—H振动拉曼位移与温度和压力关系的表达式。该研究结果可以用于实测流体包裹体在不同温度下的内压,并可由此获得流体包裹体的p-t线或等容线。这不仅有助于精确获得流体包裹体的形成温度和形成压力,也可为研究和确定流体包裹体中流体的组成和性质提供依据。

Determination of inner pressure for fluid inclusion by Raman spectroscopy and its application

Using Diamond Anvil Cell combined with the micro Raman spectroscopy, the author has obtained the quantitative relationships among Raman shifts, pressure and temperature for the vibration of O—H in H2O-NaCl, C—O in CO2-3, S—O in SO2-4 and C—H in n-heptane-cyclohexane. On the basis of these relationships, we can determine the inner pressure for the fluid inclusion and further determine the isochore. It is not only helpful in obtaining the forming temperature and pressure for minerals, but also able to provide the information of the chemical composition of the fluid inclusion.