巴基斯坦橄榄石宝石学及矿物谱学特征研究
DOI:
作者:
作者单位:

作者简介:

通讯作者:

中图分类号:

P578.94+2;P575.4

基金项目:

上海市科委项目(15DZ2283200,18DZ2281300)


A study of gemology and mineral spectroscopy characteristics of peridot from Pakistan
Author:
Affiliation:

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
  • |
  • 文章评论
    摘要:

    采用常规宝石学仪器并结合电子探针、激光剥蚀电感耦合等离子体质谱仪、(显微)红外光谱仪、紫外-可见吸收光谱以及拉曼光谱仪等测试方法,对巴基斯坦橄榄石进行了常规宝石学、化学成分和谱学特征等研究,并探讨了其产地鉴别方法和依据。结果表明,巴基斯坦橄榄石含有针状"硼镁铁矿-硼铁矿"、点状磁铁矿等特征矿物包裹体组合;与美国、中国、埃塞俄比亚、越南、马达加斯加等地所产的橄榄石相比,巴基斯坦橄榄石的微量化学元素组成相对富Li、B、Sc,贫Zn、Cu,同时V/Sc值偏低;巴基斯坦橄榄石红外吸收光谱中普遍存在的3 580 cm-1附近吸收谱带与[Si]=(4H)SiX替代机制有关,指示其晶体中含有一定量的结构水;紫外-可见吸收光谱中的380、450、490、635 nm附近强吸收峰分别与O2-→Fe3+电荷转移带,Fe3+6A14A1+4E(4G)电子跃迁和Fe2+5T2g3T2g5T2g3T1g电子跃迁有关。综合分析认为,包裹体、微量化学成分和结构水致红外吸收谱带特征组合可视为巴基斯坦橄榄石的产地鉴别依据。

    Abstract:

    Microscope, LA-ICP-MS, (Micro)FT-IR, UV-Vis, Raman and other methods were used to analyze conventional gemology, chemical element content and spectral features of Pakistan peridot, so as to discuss its origin characteristics. The result shows that Pakistan peridots contain black Vonsenite-Ludwigite needle and punctiform msgnetite. Compared with peridots from the USA, China, Ethiopia, Vietnam and Madagascar, Pakistan perdots have higher Li, B, Sc but lower Zn, Cu, with relatively lower V/Sc ratio. The absorption bond around 3 580 cm-1 in the infrared absorption spectrum of peridot in Pakistan is related to the [Si]=(4H)SiX substitution mechanism, indicating that the crystal structure contains a certain amount of structural water. The strong absorption near 380, 450, 490, 635 nm in UV-Vis spectrum is related to O2-→Fe3+ transition, 6A14A1+4E(4G)in d-d transition of Fe3+ and 5T2g3T2, 5T2g3T1g electron transition of Fe2+. It is concluded that inclusion, trace element and structural water-induced infrared absorption band can be used as the origin identification characteristics of peridots in Pakistan.

    参考文献
    相似文献
    引证文献
引用本文

阮维迪,周征宇,DIETMAR Schwarz,杨萧亦,陈彦宇,刘奕岑,2021,巴基斯坦橄榄石宝石学及矿物谱学特征研究[J].岩石矿物学杂志,40(3):593~604. RUAN Wei-di, ZHOU Zheng-yu, DIETMAR Schwarz, YANG Xiao-yi, CHEN Yan-yu, LIU Yi-cen,2021,A study of gemology and mineral spectroscopy characteristics of peridot from Pakistan[J]. Acta Petrologica et Mineralogica,40(3):593~604.

复制
分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:2020-03-26
  • 最后修改日期:
  • 录用日期:
  • 在线发布日期: 2021-05-22
  • 出版日期: