云南保山南红玛瑙矿物学特性及致色机理探究
发布时间：2018-09-12 12:52
【摘要】：通过光学显微镜、X射线粉晶衍射、X射线荧光光谱、电感耦合等离子体质谱、电子探针等测试分析手段对云南保山南红玛瑙的岩相学、矿物组成、化学成分等进行了系统研究,在此基础上进一步通过扫描电镜、X射线能谱元素面扫描、激光共聚焦显微拉曼分析了南红玛瑙致色矿物形貌、元素分布及矿物物相构成。研究结果表明,保山南红玛瑙主要矿物为石英(95%,质量分数),主要结构为粒状结构和纤维结构,次要矿物为斜硅石及方解石等,并含有吸附水和结构水两种状态水。致色矿物主要以小于1μm球状矿物颗粒、2~10μm絮状似球状集合体、针状矿物颗粒和不规则形态矿物集合体这4种类型存在,元素分析显示其为含铁矿物。显微拉曼进一步确认南红玛瑙的颜色是由含铁矿物所致,其中红色致色主要为赤铁矿,黄色致色主要为针铁矿,铁矿物的具体存在形式及其分布方式对南红玛瑙的价值具有决定性作用。本工作为南红玛瑙矿物学特性以及致色机理研究提供了有价值的参考信息,对完善其知识体系和推动南红玛瑙文化有重要意义,同时对借助共聚焦显微拉曼等微区表征技术推动宝玉石研究提供了新思路。
[Abstract]:The petrography, mineral composition and chemical composition of red agate in Baoshan, Yunnan Province, were systematically studied by means of X-ray fluorescence spectrum, inductively coupled plasma mass spectrometry and electron probe. On this basis, the morphology, elemental distribution and mineral composition of red agate were analyzed by scanning electron microscope and laser confocal microscopy with X-ray energy spectrum elemental surface scanning and laser confocal microscopy. The results show that the main mineral of red agate in Baoshan is quartz (95%, mass fraction), the main structure is granular structure and fiber structure, the secondary mineral is orthosilicate and calcite, and there are two kinds of water, adsorbed water and structural water. The chromogenic minerals mainly exist in the four types of flocculating spherical aggregates, needle-like mineral particles and irregular mineral aggregates, which are less than 1 渭 m spherical mineral particles and 10 渭 m flocculant aggregates. The elemental analysis shows that they are iron-bearing minerals. Microscopic Raman further confirmed that the color of southern red agate was caused by iron bearing minerals, in which the red color was mainly hematite, and the yellow color was mainly goethite. The specific form and distribution of iron minerals play a decisive role in the value of the southern red agate. This work provides valuable reference information for the study of the mineralogical characteristics and chromogenic mechanism of the southern red agate, and is of great significance to improve its knowledge system and promote the culture of the southern red agate. At the same time, it provides a new way to promote the study of Baojadeite by means of confocal micro-Raman and other microregional characterization techniques.
【作者单位】： 北京大学地球与空间科学学院;北大宝石鉴定中心;
【分类号】：P619.283
本文编号：2239060
[Abstract]:The petrography, mineral composition and chemical composition of red agate in Baoshan, Yunnan Province, were systematically studied by means of X-ray fluorescence spectrum, inductively coupled plasma mass spectrometry and electron probe. On this basis, the morphology, elemental distribution and mineral composition of red agate were analyzed by scanning electron microscope and laser confocal microscopy with X-ray energy spectrum elemental surface scanning and laser confocal microscopy. The results show that the main mineral of red agate in Baoshan is quartz (95%, mass fraction), the main structure is granular structure and fiber structure, the secondary mineral is orthosilicate and calcite, and there are two kinds of water, adsorbed water and structural water. The chromogenic minerals mainly exist in the four types of flocculating spherical aggregates, needle-like mineral particles and irregular mineral aggregates, which are less than 1 渭 m spherical mineral particles and 10 渭 m flocculant aggregates. The elemental analysis shows that they are iron-bearing minerals. Microscopic Raman further confirmed that the color of southern red agate was caused by iron bearing minerals, in which the red color was mainly hematite, and the yellow color was mainly goethite. The specific form and distribution of iron minerals play a decisive role in the value of the southern red agate. This work provides valuable reference information for the study of the mineralogical characteristics and chromogenic mechanism of the southern red agate, and is of great significance to improve its knowledge system and promote the culture of the southern red agate. At the same time, it provides a new way to promote the study of Baojadeite by means of confocal micro-Raman and other microregional characterization techniques.
【作者单位】： 北京大学地球与空间科学学院;北大宝石鉴定中心;
【分类号】：P619.283
【相似文献】
相关硕士学位论文 前2条
1 宋晓淳;云南保山南红玛瑙的宝石矿物学研究[D];石家庄经济学院;2015年
2 赵云淼;云南保山南红玛瑙的宝石矿物学研究[D];中国地质大学(北京);2015年
，本文编号：2239060
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