|
|||||
|
|
| 一种长英黝帘石玉的岩石矿物学研究 | |
| 引用本文： | 凌潇潇,吴瑞华,王时麒,鞠 颖,李青会.一种长英黝帘石玉的岩石矿物学研究[J].岩石矿物学杂志,2010,29(1):95-99. |
| 作者姓名： | 凌潇潇 吴瑞华 王时麒 鞠 颖 李青会 |
| 作者单位： | 1. 中国地质大学,北京,100083 2. 北京大学,宝石鉴定中心,北京,100871 3. 中国地质大学,矿物材料国家专业实验室,北京,100083 4. 中国科学院,上海光学精密机械研究所,上海,201800 |
| 基金项目： | 国家自然科学基金资助项目 |
| 摘 要： | 采用X射线粉晶衍射、电子探针、化学分析法和傅立叶变换红外光谱等方法,对近来在北京珠宝市场上出现的一种粉白相间的玉石新品种进行了测试,全面分析了这种玉石的结构和成分,并根据硅酸盐体系的物质平衡原理,利用相混合计算(PMC)方法,估算了玉石中主要矿物的含量。结果表明,这种玉石中黝帘石含量占51.9%,钠长石占33.3%,石英14.4%,并含有少量的褐帘石、单斜辉石等矿物。样品中粉红色矿物的红外光谱最强峰位于1110～900cm-1范围内,为快速、方便地鉴定此种玉石提供了参考依据。 |
| 关 键 词： | 黝帘石 钠长石 玉石 相混合计算 岩石矿物学特征 |
Petrology and mineralogy of a new kind of felsic zoisite jade |
|
| LING Xiao_xiao,WU Rui_hu,WANG Shi_qi,JU Ying and LI Qing_hui.Petrology and mineralogy of a new kind of felsic zoisite jade[J].Acta Petrologica Et Mineralogica,2010,29(1):95-99. | |
| Authors: | LING Xiao_xiao WU Rui_hu WANG Shi_qi JU Ying and LI Qing_hui |
| Abstract: | In order to determine the petrological and mineralogical characteristics of a new kind of pink jade that appeared in Beijing jewelry market recently, the authors used X-ray diffraction(XRD), electron-probe microanalysis (EPMA) , whole rock chemical analysis and Fourier transform infrared (FTIR) spectroscopy to investigate the structure and composition of the pebble sample of this new kind of pink jade. On the basis of the mass balance principle, the proportions of the jade were estimated by means of the phase mixing calculation (PMC). The result shows that the fresh surface of this kind of jade is pink, whereas the weathered surface is yellowish gray. As for gemmological characteristics, this kind of jade is translucent to opaque and has glassy luster, with the relative density being 2.93. With the variation of the proportion of minerals, the refraction indices vary between 1.56 and 1.70. The minerals of the jade are mainly zoisite, albite and quartz, with small amounts of allanite and clinopyroxenes. Results of EPMA and whole rock chemical analysis with the adoption of PMC show that this kind of jade contains 51.9% zoisite, 33.30% albite, 14.4% quartz, 0.6% allanite and 0.1% clinopyroxenes. XRD data have given the same conclusion. The strongest infrared absorption bands of the pink mineral appear in the range of 1 110～900 cm~(-1), similar to the peak value of standard zoisite, indicating that the main mineral of this jade is zoisite, and hence this new jade is a kind of felsic zoisite jade. In comparison with chemical composition of other colors of zoisites, the trace element Mn is very high, suggesting that the pink color of this kind of jade is caused by Mn. These results provide valuable reference for the rapid and accurate deter-mination of the jade. |
| Keywords: | zoisite albite jade phase mixing calculation(PMC) petrological and mineralogical characteristics |
| 本文献已被 CNKI 万方数据 等数据库收录！ | |
| 点击此处可从《岩石矿物学杂志》浏览原始摘要信息 | |
| 点击此处可从《岩石矿物学杂志》下载免费的PDF全文 | |