便携式短波红外矿物分析仪(PIMA)在西藏墨竹工卡县驱龙铜矿区矿物填图中的应用
Application of the portable infrared mineral analyser (PIMA) in mineral mapping in the Qulong copper prospect, Mozhugongka County Tibet
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摘要: 介绍了应用国内近两年新引进的便携式短波红外矿物分析仪(PortableInfraredMineralAnalyser,简称PIMA)在西藏驱龙铜矿区所做的矿物填图的工作情况,以及依据PIMA测试所获得的光谱数据进行矿物识别的初步研究成果。通过野外对探槽TC0701和TC1101系统采样和对应的光谱测试分析,识别出了与矿化和矿体有直接关系的蚀变指示矿物硬石膏(anhydrite)。在矿物识别过程中,提取到了可以作为矿区标准光谱的白云母等矿物的纯光谱曲线,并且在野外验证过程中确认了航天图像(Hyperion)上解译的零星分布的蚀变矿物绿泥石的存在。
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关键词:
- 便携式短波红外矿物分析仪(PIMA) /
- 西藏驱龙铜矿 /
- 矿物填图
Abstract: The portable infrared mineral analyser (PIMA) introduced from abroad two years ago was used in mineral mapping in the Qulong copper prospect, Tibet, and minerals were recognized based on the spectral data obtained by PIMA analysis. In this study, two trenches, TC0701 and TC1101, were systemically sampled. The tested spectral data were processed by the PIMA VIEW 3.1, and comparison of the results of mineral discrimination with the field investigation information indicates that anhydrite is an alteration indicator mineral directly related to copper mineralization and orebodies. In addition, in the process of mineral discrimination, pure spectra of minerals such as muscovite that may be used as the standard spectra in the copper prospect were obtained. The existence of the scattered alteration mineral chlorite which is interpreted from the Hyperion data has been confirmed in the course of field checks. -
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