激光拉曼光谱技术在地矿领域的应用与研究进展  

Application and research progress of Laser Raman spectroscopy in geology and mineral resources

作　　者：何佳乐[1] 潘忠习[1] 杜谷[1] HE Jiale;PAN Zhongxi;DU Gu(Chengdu Center of China Geological Survey,Sichuan Chengdu 610081,China)

机构地区：[1]中国地质调查局成都地质调查中心,四川成都610081

出　　处：《中国地质调查》2022年第5期111-119,共9页Geological Survey of China

基　　金：国家公益性行业科研专项“岩矿鉴定与环境分析设备使用与维护管理技术方法研究(编号:201311081-2)”项目资助。

摘　　要：激光拉曼光谱技术作为一种微区定性分析方法,在地质矿产领域中的应用主要体现在流体包裹体分析、沉积有机质研究以及矿物组分鉴定方面。在流体包裹体分析中,诸如高斯-洛仑兹去卷积分峰、频移参数法、CO_(2)拉曼光谱压力计等方法以传统的定性分析为基础,借助峰面积、峰半高宽等拉曼特征参数与浓度、压力、同位素的良好线性关系,可对其盐度、压力、同位素进行分析;在沉积有机质研究中,碳质物拉曼温度计可反映岩石变质级别、有机质成熟度和热演化程度;在矿物组分鉴定中,运用点到点、点到面方式可方便快捷地对相似矿物、微小矿物进行鉴别。结合相关文献,评述了激光拉曼光谱在以上方面的最新发展,总结了现有成果和应用中存在的问题,认为这些新方法能较好地弥补传统方法的不足,但也需注意诸如荧光干扰、不同实验条件等对实验过程的便捷性、重现性和实验结果准确性的影响;认为未来应当加强激光拉曼光谱与其他仪器之间的联用,以提高测试效率,进一步拓展拉曼光谱技术在矿产资源利用与综合研究中的应用范围,为地质工作提供更为高效的技术手段。Laser Raman spectroscopy is a qualitative analysis method,with the characteristics of high precision,convenience and non-destructive.And it has made progress in the field of geology and mineral resources with the continuous improvement of technology in recent years,which was mainly reflected in fluid inclusion analysis,sedimentary organic matter research and mineral component identification.In fluid inclusion analysis,the traditional qualitative analysis,such as gaussian-lorentz to volume integral peak,the parameters of the frequency shift method and CO_(2) Raman spectra method were set as basis,and the good linear relationships between Raman characteristic parameters of peak area and half peak and concentration,pressure,isotope were used together to analyze the pressure,salinity and isotopic.The metamorphic grade,maturity and thermal evolution degree of rock organic matter can be directly analyzed by the carbonaceous Raman thermometers in the study of sedimentary organic matter.The point-to-point and point-to-surface methods can be used conveniently and quickly to identify similar minerals and micro-minerals during identification of similar and microscopical mineral components.The latest development of laser Raman spectrum in the above aspects are reviewed and the existing achievements and the problems in the application are summarized in combination with related literature in this paper.The authors conclude that the lack of the traditional methods were offset by these new methods,and the influence of fluorescence interference and different experimental conditions on experimental convenience,reproducibility and accuracy should also be paid attention.Besides,the future development is put forward,and it is suggested that the combination of Laser Raman spectroscopy and other instruments should be used in conjunction to improve the testing efficiency,which could further expand the application scope of Raman spectroscopy in the utilization and comprehensive research of mineral resources,and provide a more efficient t

关 键 词：激光拉曼光谱 流体包裹体 沉积有机质 矿物组分鉴定 研究进展 

分 类 号：P575[天文地球—矿物学] TE135[天文地球—地质学]