利用α径迹蚀刻定位微量含钨矿物的实验研究  

Experimental Research on Localization of Trace Tungsten-containing Mineral byα-track Etching

作　　者：李光来[1] 尹晓燕 宋炎 刘小波 龙伟康 LI Guanglai;YIN Xiaoyan;SONG Yan;LIU Xiaobo;LONG Weikang(State Key Laboratory of Nuclear Resources and Environment,East China University of Technology,Nanchang 330013,China)

机构地区：[1]东华理工大学核资源与环境国家重点实验室,江西南昌330013

出　　处：《原子能科学技术》2021年第10期1907-1913,共7页Atomic Energy Science and Technology

基　　金：国家自然科学基金(41972071,41862004)。

摘　　要：含钨矿物承载了许多钨的矿化信息,除黑钨矿与白钨矿外,钨矿石中还存在许多他种含钨矿物,这些矿物常因含量少且不常见而被忽视。本文以聚源钨矿为研究对象,利用这类矿物常不同程度地含有U、Th等放射性元素的特性,针对性地设计了α径迹蚀刻实验,配合光学显微镜、扫描电镜能谱技术对该矿床白钨矿石进行了不常见含钨矿物研究。聚源钨矿7个薄片中共发现径迹蚀刻集中点32处,扫描电镜检查后发现,除黑钨矿、白钨矿外聚源钨矿中含钨矿物还包含大量的铌酸盐矿物。分析了通过α径迹蚀刻实验寻找含钨矿物方法的可行性。此外,在蚀刻点对应位置还发现大量富含铀钍的稀土以及铌、钽、锆矿物,这在一定程度上说明α径迹蚀刻同样适用于定位薄片中稀土和稀有金属矿物。Tungsten-containing minerals carry a lot of tungsten mineralization information.In addition to wolframite and scheelite,there are many kinds of tungsten-containing minerals in tungsten ores.These minerals are often neglected because they are small and uncommon.According to such minerals often contains radioactive elements such as uranium and thorium,in this paper,theα-track etching experiment was designed in accordance with the optical microscope and scanning electron microscopy(SEM)to study these minerals in Juyuan tungsten deposit.A total of 32 track etch points were found in 7 thin sections from the Juyuan tungsten deposit.It is found by SEM that the tungsten-containing minerals of the scheelite ore not only include the scheelite and the wolframite,but also include niobate minerals.The feasibility of searching for tungsten-containing minerals byα-track etching experiments was also analyzed in this paper.In addition,a large number of rare earth element-,niobium-,tantalum-and zirconium-bearing minerals rich in uranium and thorium were found at the corresponding locations of the etched points in thin sections,which suggestsα-track etching is also suitable for locating these minerals in thin sections.

关 键 词：含钨矿物 α径迹蚀刻 放射性元素 聚源钨矿 

分 类 号：O571.33[理学—粒子物理与原子核物理] P575[理学—物理]