摘要
萤石作为我国重要的战略性矿产资源,广泛应用于冶金、玻璃和陶瓷等工业领域。萤石因其丰富多彩的颜色、显著的荧光特性与较好的结晶习性,深受矿物收藏者的青睐。目前,针对烟台蓬莱巨山沟、临沂郯城房庄和青岛平度三合山等地典型萤石矿的宝石学、矿物学特征尚未得到系统研究。鉴于此,本文通过手标本观察、常规宝石学实验、激光显微拉曼光谱、电子探针显微分析以及原位LA ICP MS等测试手段,对山东典型萤石矿的基本属性、结构、谱学特征、成矿流体来源和形成环境等进行了详细表征。结果表明,萤石拉曼光谱的谱线特征可划分为2类:Ⅰ类拉曼峰值仅位于322 cm^(-1),为典型萤石谱图;Ⅱ类拉曼峰值除位于322 cm^(-1)外,还存在800~3000 cm^(-1)的5组谱带,与稀土元素有关。微量元素地球化学揭示,青岛平度三合山地区萤石稀土元素配分模式为平坦型,典型Eu负异常,结晶温度较高,且处于还原环境,成矿流体主要源于大气降水;而临沂郯城房庄和烟台蓬莱巨山沟地区萤石,显示Eu正异常,结晶温度较低且处于氧化环境,前者成矿流体为海水和大气降水混合流体,而后者主要为源于海水。
As an important strategic mineral resource in China,the fluorite is widely used in industry,metallurgy,glass and ceramics.The fluorite is favored by mineral collectors because of its colorful color,remarkable fluorescence characteristics and good crystallization habit.Currently,gemological and mineralogical characteristics of typical fluorite deposits in Penglai Jushangou in Yantai city,Tancheng Fangzhuang in Linyi city and Pingdu Sanhe Mountain in Qingdao city in Shandong province have not been systematically studied.Through hand sample observation,conventional gemological experiments,laser micro-Raman spectroscopy,electron probe microanalysis,as well as in-situ LA-ICP-MS trace element analysis,basic properties,textures,spectral characteristics,ore-forming fluid source and formation environments of typical fluorite in Shandong province have been characterized in detail.It is showed that two dominant types of Raman spectra of fluorite can be identified:TypeⅠ,with the peak value at 322 cm^(-1),while as for TypeⅡ,except for the typical peak of 322 cm^(-1),there present 5 groups of spectral bands in the range of 800~3000cm^(-1).It is related to the peak of rare earth elements.The trace element geochemistry reveals that rare earth elements patterns of fluorite in Pingdu Sanhe Mountain in Qingdao city is flat type,with typical negative Eu anomaly and high crystallization under reducing environment.The ore-forming fluids are mainly derived from atmospheric precipitation.While the fluorite in Tancheng Fangzhuang in Linyi city and Penglai Jushangou in Yantai city show positive Eu anomaly,with low crystallization temperature and oxidation environment.The former ore-forming fluids are mixed fluids of seawater and atmospheric precipitation,while the latter is mainly derived from seawater.
作者
宋晓媚
王小玉
左晓敏
张震
张保涛
郭伟
柳森
葛瑞臣
SONG Xiaomei;WANG Xiaoyu;ZUO Xiaomin;ZHANG Zhen;ZHANG Baotao;GUO Wei;LIU Sen;GE Ruichen(Shandong Provincial Museum of Geology,Shandong Ji'nan 250299,China;Shandong Zhengyuan Geological Exploration Institute of China Metallurgical Geology Bureau,Shandong Ji'nan 250014,China)
出处
《山东国土资源》
2025年第7期10-18,共9页
Shandong Land and Resources
基金
山东省地质勘查基金项目
山东省自然资源厅2022年委托项目
山东省典型矿物标本及晶体特征综合研究(鲁勘字〔2022〕13号)。
关键词
萤石
宝石矿物学特征
拉曼光谱
微量元素地球化学
山东省
Fluorite
gemmological and mineralogical characteristics
Laser Raman spectrum
trace elements geochemistry
Shandong province
作者简介
宋晓媚(1982-),女,山东博兴人,高级工程师,主要从事地质博物馆科学研究及科普工作,E-mail:5277157893@qq.com;通信作者:王小玉(1987-),女,山东平度人,高级工程师,主要从事地质勘查及找矿研究工作,E-mail:564826959@qq.com。
