原位微区X射线荧光分析在矿物学研究中的应用  

Application of In Situ Micro Energy Dispersive X-Ray Fluorescence Analysis in Mineralogy

作　　者：杨海[1] 葛良全[1] 谷懿[1] 张庆贤[1] 熊盛青[2] 

机构地区：[1]成都理工大学核技术与自动化工程学院,四川成都610059 [2]中国国土资源航空物探遥感中心,北京100083

出　　处：《光谱学与光谱分析》2013年第11期3137-3141,共5页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金项目(41204134);中国地质大调查项目(1212011087005);国家(863计划)项目(2012AA061803)资助

摘　　要：从新疆采集了13件岩矿石样品,用于研究蚀变过程中矿物的元素含量变化特征。成都理工大学研制的IED-6000型原位微区X射线荧光分析仪被应用于获得蚀变过程中矿物的化学和物理数据。这种无损的微区X射线荧光分析仪主要是以低功耗X光管和电致冷Si-PIN半导体探测器为基础,采用毛细管X射线透镜实现微区测量的功能,并且能够集成到任何显微镜上进行测量,焦斑长轴直径约110μm。通过微区X射线荧光测量,将黝铜矿更正为黄铁矿,提高了矿物鉴定的效率及准确性;在蚀变剖面研究中,矿化岩石样品的长石颗粒都富含Cu和Zn元素,可以作为找矿直接指示元素。Cr,Mn和Co等元素含量与矿化程度呈负相关。Thirteen rock samples were collected for studying the variation of element content in the mineral during the alteration process from Xinjiang, China. The IED-6000 in situ micro energy dispersive X-ray fluorescence developed by CDUT was applied to get chemical and physical data from minerals. The non-destructive spectrometer is based on a low-power Mo-anode X-ray tube and a Si-PIN peltier cooled X-ray detector. The unique design of the tube＇s probe allows very close coupling of polycapillary and makes the use of micro-area measurement feasible and efficient. The spectrometer can be integrated into any microscope for anal ysis. The long axis diameter of beam spot is about 110 um. According to micro-EDXRF measurement, the tetrahedrite was cor rected to pyrite, improving the efficiency and accuracy of the mineral identification. The feldspar of mineralized rock sample is rich in Cu and Zn which can be used as prospecting indicator elements. Element content of Cr, Mn and Co shows negative corre lation with the degree of mineralization.

关 键 词：矿物 微区X射线荧光 多毛细管X射线透镜 原位分析 

分 类 号：O657.3[理学—分析化学]