越南Luc Yen矿区尖晶石常规宝石学及内含物特征研究

Study on conventional gemology and characteristic inclusions of spinel in Luc Yen mining area,Vietnam

本文使用折射仪、荧光光谱仪、显微镜、拉曼光谱仪等多种测试仪器,对越南Luc Yen地区的尖晶石样品进行了常规宝石学特征及内含物的成分研究,为其产地鉴别提供理论依据。研究结果显示,越南Luc Yen地区尖晶石的折射率范围主要为1.716~1.718,在长波紫外光照射下大部分为弱~强的浅橙~红色荧光,短波紫外光下大部分为荧光惰性;样品相对密度约为3.63~3.98;显微观察可见固相包裹体、管状气液包裹体、网格状包裹体等包裹体,经拉曼光谱测试可确认的包裹体种类有八面体负晶包裹体、硬水铝石和CO2的拉长扁平负晶、金红石、磷灰石、锆石、方解石、阳起石、白云石、金云母、歪长石。

In this paper,the gemological and inclusion characteristic of spinel samples produced in Luc Yen area of Vietnam were studied and provide a theoretical basis for its origin identification by a variety of test instruments such as refractive index meter,fluorescence spectrometer,microscope,and Raman spectrometer,etc..The research results show that the refractive index is mainly from 1.716 to 1.718.The fluorescence of most samples is weak to strong light orange to red fluorescence under long-wave ultraviolet light,and most of them are fluorescent inert under short-wave ultraviolet light.The relative density is about 3.63~3.98.Microscopic observation showed solid phase inclusions,tubular gas-liquid inclusions,grid like inclusions and other morphological inclusions.The inclusions identified by Raman spectrometer include good-shaped octahedral negative crystal inclusions,elongated flat negative crystals of diaspore and CO2,rutile,apatite,zircon,calcite,actinolite,dolomite,phlogopite,and anorthoclase.