雪宝顶白钨矿的谱学特征及主微量元素分析

doi:10.3964/j.issn.1000-0593(2024)06-1689-08

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Abstract Scheelite is a rare gemstone with a massive granular structure, exhibiting a white to light yellow coloration, greasy luster, and obvious fluorescence. The scheelite deposit at Xuebaoding in the Pingwu region of Sichuan Province is a vein-like hydrothermal-type deposit with weak alteration of host rocks. Scheelite produced has a high color saturation, perfect crystal form, and pure color, associated with beryl, cassite and muscovite. The nearly colorless to orange tone scheelite from Xuebaoding was taken as the research object in this study. Comprehensive analysis was conducted using X-ray powder diffraction (XRD), Fourier infrared spectrum analysis, ultraviolet-visible spectrophotometer, laser Raman spectrometer, electron probe, and laser ablation inductively coupled plasma mass spectrometer (LA-ICP-MS). The mineral composition, crystal structure, characteristic identification spectral bands, color-causing ions, as well as the contents of the main and trace elements, rare earth and other chemical components of the nearly colorless to orange tone scheelite were determined by combining mineralogy, spectroscopy and main and trace elements characteristics. The relationship between rare earth element content and color genesis was also discussed. All have to provide the diagnostic basis for identification of nearly colorless to orange tone scheelite from Xuebaoding. The research results demonstrate that scheelite exhibits good crystallinity, displaying a uniform chemical composition without obvious discontinuity. The mineral composition is relatively concentrated, and the accessory minerals are mostly muscovite and illite. Significantly, scheelite's typical infrared characteristic peaks were observed at 440, 809 and 870 cm^-1, along with a peak at 448 cm^-1 related to Ca²⁺. The spectral peak exhibits higher absorption for deeper color tones. In the same way, the Raman characteristic peak is at 909 cm^-1, and the Ca—O lattice vibration peak is at 207 cm^-1, with increasing intensity as the color tone deepens. Additionally, the ultraviolet absorption peaks show strong absorption in the orange-yellow region, with peaks around 383, 570, 584 and 804 nm. The nearly colorles scheelite samples only exhibit a peak at 383 nm, while the scheelite sample with a lighter yellow tone demonstrates weak absorption of Fe³⁺ in the near ultraviolet region. Conversely, the scheelite samples with a deeper yellow tone display strong absorption of Fe³⁺ in the blue-purple region and the orange tone due to Nd³⁺. Moreover, the chemical components of scheelite reveal a WO₃/CaO mass ratio that approaches or exceeds the ideal value, while the content of the nearly colorless scheelite sample is relatively concentrated. The trace element Fe demonstrates a positive correlation with color tone, whereby the content increases as the yellow tone becomes darker. Nevertheless, the total amount of rare earths varies widely, with an enrichment of light rare earths, significant negative Eu anomalies, and insignificant Ce anomalies. The light yellow tone is influenced by trace elements Si and Fe and the d-d electronic transition of Fe³⁺. Similarly, the yellow tone is affected by trace elements Mn and Fe, along with the electronic transition of Fe³⁺. In contrast, the orange tone is significantly impacted by rare earth elements Nd and Sm.

Key words：Xuebaoding;Scheelite;Nearly colorless to orange tone;Spectral characteristics;Characteristics of main and trace elements in in-situ micro areas

Received: 2023-07-15 Accepted: 2024-03-05

ZTFLH:

P575.4

Corresponding Authors: SHI Miao E-mail: miaoer727@126.com

Cite this article:

CAO Qin-yuan,SHI Miao,MA Shi-yu. Spectral Characteristics and Analysis of Main and Trace Elements of Scheelite From Xuebaoding[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2024, 44(06): 1689-1696.

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https://www.gpxygpfx.com/EN/10.3964/j.issn.1000-0593(2024)06-1689-08 OR https://www.gpxygpfx.com/EN/Y2024/V44/I06/1689

[1] LI Sheng-rong(李胜荣). Crystallography and Mineralogy(结晶学与矿物学). Beijing: Geological Press(北京: 地质出版社), 2008. 284.
[2] SONG Guo-xue, XIONG Yu-xin(宋国学, 熊玉新). Shandong Land and Resources(山东国土资源), 2021, 37(2): 1.
[3] LIU Yan(刘琰). Acta Petrologica et Mineralogica(岩石矿物学杂志), 2017, 36(4): 549.
[4] WU Da-wei, LI Bao-hua, DU Xiao-fei, et al(吴大伟, 李葆华, 杜晓飞, 等). Mineral Deposits(矿床地质), 2015, 34(4): 745.
[5] LIU Yan, DENG Jun, LI Chao-feng, et al(刘琰, 邓军, 李潮峰, 等). Chinese Science Bulletin(科学通报), 2007, 52(16): 1923.
[6] ZHU Xin-xiang, LIU Yan(朱鑫祥, 刘琰). Rock and Mineral Analysis(岩矿测试), 2021, 40(2): 296.
[7] LIU Xian-yu, YANG Jiu-chang, TU Cai, et al(刘衔宇, 杨九昌, 涂彩, 等). Spectroscopy and Spectral Analysis(光谱学与光谱分析), 2023, 43(8): 2550.
[8] LIU Yan, DENG Jun, XING Yan-yan, et al(刘琰, 邓军, 邢延炎, 等). Spectroscopy and Spectral Analysis(光谱学与光谱分析), 2008，28(1): 121.
[9] AN Na, GUO Qing-feng, LIAO Li-bing(安娜, 郭庆丰, 廖立兵). National Gemstone Testing Center, Proceedings of the China International Jewelry and Jewelry Academic Exchange Conference(国家珠宝玉石质量监督检验中心，中国国际珠宝首饰学术交流会论文集), 2019: 174.
[10] LI Jian-kang, LIU Shan-bao, WANG Deng-hong, et al(李建康, 刘善宝, 王登红, 等). Mineral Deposits(矿床地质), 2007, 26(5): 557.
[11] YAN Dan-ping, LI Shu-bing, CAO Wen-tao, et al(颜丹平, 李书兵, 曹文涛, 等). Earth Science Frontiers [China University of Geosciences (Beijing); Peking University][地学前缘(中国地质大学（北京）；北京大学)], 2010, 17(5): 106.
[12] LIU He, YAN Dan-ping, WEI Guo-qing(刘鹤, 颜丹平, 魏国庆). Acta Geologica Sinica(地质学报), 2008, 82(4): 464.
[13] Zhu Xinxiang, Raschke M B, Liu Yan. Minerals, 2020, 10(5): 438.
[14] CAO Zhi-min, REN Jian-guo, LI You-guo, et al(曹志敏, 任建国, 李佑国, 等). Science in China (Series D)[中国科学(D辑：地球科学)], 2002, 32(1): 64.
[15] Liu Yan, Deng Jun, Li Chaofeng, et al. Chinese Science Bulletin, 2007, 52(18): 2543.
[16] ZHAO Yu-ting, LI Zi-ying, LIU Jun-gang, et al(赵宇霆，李子颖，刘军港，等). World Nuclear Geoscience(世界核地质科学), 2021, 38(2): 144.
[17] WEN Lu(闻辂). Mineral Infrared Spectroscopy(矿物红外光谱学). Chongqing: Chongqing Univesity Press(重庆: 重庆大学出版社), 1989.
[18] ZHOU Pei-ling(周佩玲). Journal of East China Institute of Geosciences(华东地质学院学报), 1983，(2): 12.
[19] De La Pierre M, Noel Y, Mustapha S, et al. American Mineralogist, 2013, 98(5-6): 966.
[20] LUO Yue-ping, CHEN Jing-jing(罗跃平, 陈晶晶). Journal of Gems & Gemology[宝石和宝石学杂志(中英文)], 2020, 22(5): 39.
[21] SU Yu-zhi, YANG Chun, LUO Yuan(苏雨峙, 杨春, 罗源). Journal of Gems and Gemology(宝石和宝石学杂志), 2015, 17(6): 25.
[22] CHEN Tao, LIU Yun-gui, YIN Zuo-wei, et al(陈涛, 刘云贵, 尹作为, 等). Spectroscopy and Spectral Analysis(光谱学与光谱分析), 2013, 33(11): 2964.
[23] WU Rui-hua, ZHU Feng-fu, BAI Feng(吴瑞华，朱凤福，白峰). Geological Review(地质论评), 2001, 47(3): 255.
[24] Crane M, Frost R L, Williams P A, et al. Journal of Raman Spectroscopy, 2002, 33(1): 62.
[25] LI Mei-rong, WANG Hong-ling, LI Bo, et al(李美荣, 王洪岭, 李波, 等). Acta Mineralogica Sinica(矿物学报), 2022, 42(2): 213.
[26] Sun S S, McDonough W F. Geological Society, London, Special Publications, 1989, 42(1): 313.