云南祖母绿的宝石矿物学特征与伴生矿物研究

Studies on the associated minerals and gemstone mineralogical characteristic of emerald from Yunnan Province

云南祖母绿产于麻栗坡大垭口白钨矿矿区,作为白钨矿的伴生矿流入市场。文章从云南祖母绿的宝石矿物学特征和伴生组合矿物等方面进行研究,进行拉曼光谱测试和化学成分分析,云南祖母绿在300~400 cm^(-1),681~685 cm^(-1),1 000~1 100 cm^(-1)具有特征的拉曼吸收峰;致色元素以铬和钒为主、铬低钒高,属于高钒祖母绿;通过偏光显微镜镜下观察、电子探针对祖母绿的伴生矿物长石、毒砂、萤石和电气石的特征和与祖母绿之间形成关系进行分析,以期为鉴定祖母绿的产地来源和找矿工作提供更多的参考。

Emeralds of Yunnan province are found in the Dayakou white tungsten mine in Malipo. This paper studies the mineralogical characteristics and associated mineral compositions of emeralds in Yunnan province. The Ramanspectrum and chemical composition analysis are carried out. Raman spectrum results show strong absorption peaks at 300-400 cm-1, 681-685 cm-1, 1 000-1 100 cm-1. From the component analysis, it is known that the chromic andvanadium are the main color elements, and the chromic is low and high in vanadium. The characteristics of theassociated mineral feldspar, arsenopryite, fluorite and tourmaline and their relationship with emerald are analyzed,observed by means of a polarizing microscope, so as to provide more reference for identifying the origin and mining of emerald.