香花玉黑色斑块的矿物学与光谱学特征  

Mineralogical and Spectral Characteristics of Black Patches of Xianghua Jade

作　　者：叶鹏 曾少乾 侯治华 陈昊 朱桂军 YE Peng;ZENG Shao-qian;HOU Zhi-hua;CHEN Hao;ZHU Gui-jun(Hunan Province Geological'Testing Institute,Changsha 410007,China)

机构地区：[1]湖南省地质测试研究院,湖南长沙410007

出　　处：《湖南有色金属》2021年第1期77-80,共4页Hunan Nonferrous Metals

基　　金：湖南省国土资源厅科技项目经费资助(2019B01)。

摘　　要：2015年底在郴州临武陆续发现了透闪石质玉,这是湖南省第一次发现原生透闪石质玉矿床,国内对该玉石的研究基本是空白。利用宝石显微镜放大观察矿物外观特征,并且在常规岩石矿物光薄片鉴定基础上,利用红外光谱仪和X射线衍射仪大型仪器对香花玉中黑色斑块的矿物成分及光谱学特征进行详细系统的研究。经分析得出形成黑色斑块的矿物有两种:一种是透辉石全部被绿泥石交代,另一种是磁黄铁矿被透闪石交代后,细颗粒化所形成的近条痕颜色。At the end of 2015,tremolite jade was successively discovered in Chenzhou Linwu.This is the first discovery of primary tremolite jade deposit in Hunan Province,and the research on this jade in China is basically blank.In this paper,the mineral appearance characteristics were observed with gemstone microscope,and the mineral composition and spectral characteristics of black patches in fragrant jade were systematically studied by using infrared spectrograph and X-ray diffractometer on the basis of conventional identification of rock mineral thin slices.After analysis,it is concluded that there are two kinds of minerals forming black patches:one is diopside which is completely metasomatism by chlorite,and the other is the color of near-streak formed by the granulation of pyrrhotite after metasomatism by tremolite.

关 键 词：香花玉 透闪石 绿泥石 磁黄铁矿 红外光谱 X射线衍射 

分 类 号：TG115.33[金属学及工艺—物理冶金]