应用同步辐射技术解析黄色-红色石英质玉石中的致色矿物

发布时间：2018-03-02 19:21

本文选题：同步辐射技术　切入点：脉石英　出处：《岩矿测试》2016年05期 　论文类型：期刊论文

【摘要】：质地细腻、颜色多彩的隐晶质-微粒脉石英在我国珠宝行业称为石英质玉石,颜色是石英质玉石价值判断的主要因素之一,揭示其致色矿物及致色机理对于研究石英质玉石的颜色评价指标和矿床成因具有重要意义,但前人并未直接获得致色矿物的准确信息。本文运用上海光源(SSRF)BL15U1线站的同步辐射硬X射线,使用μ-XRF和μ-XRD技术对黄色和红色隐晶质-微粒脉石英中的致色矿物进行了研究。结果表明,黄色石英质玉石由赋存于石英颗粒间或微裂纹中的针铁矿(特征衍射峰0.49574、0.41594、0.26887、0.25705、0.25189、0.24510、0.21806、0.17133 nm)或其集合体致色,红色石英质玉石由赋存于石英颗粒间或微裂纹中的赤铁矿(特征衍射峰0.36774、0.27091、0.25200 nm)或其集合体致色,黄色-红色石英质玉的颜色由针铁矿和赤铁矿共同致色,赤铁矿的显色能力要高于针铁矿。本文获得了石英质玉石中致色矿物的直接数据,为玉石结晶温度与致色机理的探讨、石英质玉石的品质评价提供了依据。
[Abstract]:The fine texture and colorful cryptic quartz with fine color are called quartz jade in the jewelry industry of our country. Color is one of the main factors to judge the value of quartz jade. It is of great significance to reveal its chromogenic minerals and mechanism for the study of the color evaluation index of quartz jade and the genesis of the deposit. In this paper, the synchrotron radiation hard X-ray of Shanghai Light Source SSRF / BL15U1 station is used. Using 渭 -XRF and 渭 -XRD techniques, the chromogenic minerals in yellow and red cryptmorillite-particle vein quartz have been studied. The yellow quartz jade is colored by goethite (characteristic diffraction peak 0.4957401594U 0.26887U 0.25705U 0.24510100.218060.17133nm), which occurs between quartz particles or in micro-cracks. Red quartz jade is caused by hematite (characteristic diffraction peak 0.36774 0.27091n / 0.25200 nm) or its aggregates, and the yellowish-red quartz jade is co-colored by goethite and hematite. The chromaticity of hematite is higher than that of goethite. In this paper, the direct data of chromophore in quartz jade are obtained, which provides a basis for the discussion of crystallization temperature and chromogenic mechanism of quartz jade and the quality evaluation of quartz jade.
【作者单位】：国土资源部珠宝玉石首饰管理中心;
【基金】：国土资源部公益性行业科研专项经费项目(201011005-2B)
【分类号】：P619.281

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