| 短波红外光谱技术在西藏尼木地区岗讲斑岩铜-钼矿床中的应用 |
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| 引用本文： | 田丰,冷成彪,张兴春,田振东,张伟,郭剑衡.短波红外光谱技术在西藏尼木地区岗讲斑岩铜-钼矿床中的应用[J].地球科学,2019,44(6):2143-2154. |
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| 作者姓名： | 田丰 冷成彪 张兴春 田振东 张伟 郭剑衡 |
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| 作者单位： | 1.中国科学院地球化学研究所矿床地球化学国家重点实验室, 贵州贵阳 550081 |
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| 基金项目： | 国家重点研发计划项目2016YFC0600305 |
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| 摘 要： | 为进一步探明岗讲斑岩铜-钼矿床蚀变和矿化结构,有效指导下一步勘查工作,利用短波红外光谱技术对矿床内典型剖面上的4个钻孔进行了系统的测试分析.共检测到绢云母类、高岭石类、绿泥石类、硫酸盐类和碳酸盐类等蚀变矿物,其中尤以绢云母类矿物最为发育.对绢云母进行短波红外光谱测试分析显示:在靠近矿体的位置,有较大的伊利石结晶度(≥1.5)和较小的绢云母Al-OH吸收位置(≤2 205 nm);而在远离矿体的位置伊利石结晶度和绢云母Al-OH吸收位置分别为0.8~1.2和2 207~2 209 nm.同时,铁氧化物强度值与氧化矿体的出现具有同步性.表明短波红外光谱的这些特征参数有助于进一步理解岗讲斑岩铜-钼矿床蚀变和矿化结构,有效识别成矿流体性质,有潜力成为该矿区及其他类似矿区有效的找矿指标.
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| 关 键 词： | 地质学 围岩蚀变 绢云母 短波红外光谱 岗讲斑岩铜-钼矿床 矿床 |
| 收稿时间： | 2018-09-28 |
Application of Short-Wave Infrared Spectroscopy in Gangjiang Porphyry Cu-Mo Deposit in Nimu Ore Field,Tibet |
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| Tian Feng,Leng Chengbiao,Zhang Xingchun,Tian Zhendong,Zhang Wei,Guo Jianheng.Application of Short-Wave Infrared Spectroscopy in Gangjiang Porphyry Cu-Mo Deposit in Nimu Ore Field,Tibet[J].Earth Science-Journal of China University of Geosciences,2019,44(6):2143-2154. |
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| Authors: | Tian Feng Leng Chengbiao Zhang Xingchun Tian Zhendong Zhang Wei Guo Jianheng |
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| Affiliation: | (State Key Laboratory of Ore Deposit Geochemistry,Institute of Geochemistry Chinese Academy of Sciences,Guiyang 550081,China;University of Chinese Academy of Sciences,Beijing 100049,China) |
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| Abstract: | In order to reveal the alteration and mineralization structure of the Gangjiang porphyry copper-molybdenum deposit, the short-wave infrared spectroscopy (SWIR) technique was systematically used to analyze the four drill-holes in the typical section of the deposit.Five types of altered mineral groups were detected, i.e.sericite, kaolinite, chlorite, sulphate and carbonate.Short wave infrared spectroscopy results of sericite show that there is a greater illite crystallinity (≥ 1.5) and a smaller sericite Al-OH absorption position (≤ 2 205 nm) towards the ore body.However, the value of illite crystallinity and sericite Al-OH absorption position distal the ore body are 0.8-1.2 and 2 207-2 209 nm, respectively.In addition, the iron oxide intensity value is synchronized oxidized ore body.It is indicated that these characteristic parameters of short-wave infrared spectroscopy are helpful to the understanding of the alteration and mineralization structure of the Gangjiang porphyry Cu-Mo deposit, which may effectively restrict the ore-forming fluid condition and provide a potential prospecting indicator for the target mine and other similar mining areas. |
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| Keywords: | geology wall rock alteration sericite short-wave infrared spectroscopy (SWIR) Gangjiang porphyry Cu-Mo deposit deposits |
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