四川党坝锂辉石矿床Ⅷ号脉锂辉石矿物学特征

Mineralogical Characteristics of Spodumene in No.VIII Pegmatite Vein of Dangba Spodumene Deposit,Sichuan

采用显微镜下观察、电子探针(EPMA)、激光剥蚀等离子质谱(LA-ICP-MS)和X射线衍射分析(XRD)等测试手段对四川党坝锂辉石矿床Ⅷ号脉锂辉石的矿物学特征开展了详细研究。结果显示,锂辉石是主要的矿石矿物,锂辉石晶体粒度较粗大,锂主要赋存于锂辉石中,伴生有铌、钽等有益组分。XRD和LA-ICP-MS分析显示,锂辉石的纯度很高(Li_(2)O平均含量7.84%),晶胞参数略小于标准卡片的晶胞参数。电子探针分析结果显示,锂辉石中SiO_(2)含量较高(65.62%~65.82%),含有少量的Fe和Mn等杂质。矿石中Li_(2)O含量达到1.33%。综合分析该锂矿具有重要的开发利用价值。

Systematic research of mineralogical characteristics of spodumene of VIII pegmatite vein in Dangba spodumene deposit are studied by microscopic observation,electron probe micro analysis(EPMA),Laser ablation plasma mass spectrometry(LA-ICP-MS)and X-ray diffraction analysis(XRD).The results show that the main ore mineral is spodumene.The spodumene crystal partical is large,lithium mainly occurs in spodumene,accompanied by niobium and tantalum beneficial components.XRD and LA-ICP-MS analysis show that the purity of spodumene is very high(the average contentof Li_(2)O is 7.84%)and the cell parameters are slightly lower than those of standard cards.The EPMA results show that the content of SiO_(2) in spodumene was high(65.62%~65.82%),with a small amount of impurities such as Fe and Mn.The contents of Li_(2)O in the pegmatite ore is up to 1.33%.To sum up,the lithium ore has important development and utilization value.