河北省灵寿县西石门金矿黄铁矿拉曼光谱研究

通过测试西石门金矿中不同矿段、不同期次的黄铁矿样品的拉曼谱峰, 探讨了该区含金黄铁矿拉曼谱峰位移的变化特征及其矿床学意义。测量结果表明: 在240～600 cm-1范围内, 黄铁矿的拉曼谱峰表现为Fe—［S2］2和Au+—［S2］2-的伸缩振动。不同矿段、不同世代的黄铁矿样品的拉曼图谱位移具明显规律性: 矿化最优的330矿段, 黄铁矿的拉曼图谱位移相对于290和370矿段, Au+—［S2］2-的伸缩振动变化大, 其拉曼谱峰偏的强度大并向低频率偏移明显；反之, 矿化差的370矿段, Fe—［S2］2的伸缩振动变化大, 强度小, 拉曼位移频率变化较小；同一矿段、不同世代的黄铁矿样品, 其拉曼谱峰变化也具有以上规律: 第Ⅰ世代黄铁矿, 拉曼强度最大, 拉曼谱峰向低频偏移不明显；反之, 主成矿期(Ⅱ, Ⅲ世代)的黄铁矿, 拉曼谱峰强度较小, 向低频偏移大。这表明: 对不同矿段、不同期次的黄铁矿颗粒进行拉曼谱峰测试, 可以为推测其含金性及所处的地质环境提供依据。

Abstract

The gold-bearing pyrite samples in different production ranges and generations from the Xishimen quartz-vein gold deposit were investigated by micro-Raman spectroscopic measurement. The Raman stretching vibration frequency of two texture type was observed in gold-bearing pyrite: One was the stretching vibration frequency of Fe—［S2］2- within 338～343 cm-1; Another was the stretching vibration frequency of Au+—［S2］2- within 374～379 cm-1. Different production ranges and generations of pyrite had different Raman spectra characteristics: All the peaks shift of Au-bearing pyrite had large intensity, big changes and towards low-frequency due to the stretching vibration of Au+—［S2］2-; All the peaks shift of Au-poor pyrite had low intensity, small changes and towards high-frequency due to the stretching vibration of Fe—［S2］2-; The study showed that the main reason of the changes of the Raman spectral was gold-bearing, so the Raman spectral characteristics of gold-bearing pyrites can be used to evaluate gold-bearing properties and geological environment of gold deposits.

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郭贵娟, 张德会, 李胜荣, 谢超, 崔月菊. 河北省灵寿县西石门金矿黄铁矿拉曼光谱研究[J]. 光谱学与光谱分析, 2017, 37(8): 2435. GUO Gui-juan, ZHANG De-hui, LI Sheng-rong, XIE Chao, CUI Yue-ju. Study on Raman Spectrum Characteristics of Pyrite in the Xishimen Gold Deposit in Lingshou, Hebei[J]. Spectroscopy and Spectral Analysis, 2017, 37(8): 2435.

河北省灵寿县西石门金矿黄铁矿拉曼光谱研究

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