岩矿石NIR光谱特征与地球化学异常成分之间的关系:以内蒙古朱拉扎嘎金矿为例

发布时间：2018-06-30 09:24

本文选题：光谱特征 + Al—OH　；参考：《地学前缘》2017年05期

【摘要】：以找矿为目的,开展矿区岩矿石反射光谱与地球化学异常成分之间的关系研究。以内蒙古朱拉扎嘎金矿为实验区,沿原P26号剖面线采集岩矿石样品,利用ASD野外光谱测试仪对样品进行光谱测试。在研究蚀变矿物光谱曲线特征和实测样品光谱数据的基础上确定提取与Al—OH、Mg—OH相关的光谱特征吸收深度参数H_(2205)和H_(2315),并研究其与地球化学异常成分之间的关系。通过分析发现,H_(2205)和H_(2315)与地球化学异常Au、Cu、Bi、Fe_2O_3、W、Mo、As有关,其中H_(2205)、H_(2315)与Bi、Fe_2O_3、W、Mo、As可以建立定量反演模型;H_(2205),H_(2315)与Au、Cu等主成矿元素定量关系不明确。研究表明,光谱吸收深度参数H_(2205)和H_(2315)反映成矿环境(高温热液环境和氧化环境)的能力较强,直接反映矿化成分(Au、Cu)的能力不明显。
[Abstract]:For the purpose of ore prospecting, the relationship between reflection spectrum and geochemical anomaly composition of rock and ore in mining area is studied. The samples of rock and ore were collected along the original P26 section line in the experimental area of Zulazaga Gold Mine in Inner Mongolia. The samples were measured by ASD field spectrometer. The absorption depth parameters H _ (2205) and H _ (2315), which are related to the extraction of Al-OHU Mg-OH, are determined on the basis of studying the spectral curve characteristics of altered minerals and the spectral data of measured samples, and the relationship between these parameters and geochemical anomalous compositions is also studied. It is found that the relationship between H _ (2205) and H _ (2315) is related to geochemical anomalies, such as Aug _ (2205) H _ (2315) and Auto-Cu. Among them, the quantitative relationship between H _ (2205) H _ (2315) and Bitife _ 2O _ 3W _ (Moas) can be established by establishing a quantitative inversion model for major ore-forming elements such as H _ (2205) H _ (2315) and Auto-Cu. The results show that the spectral absorption depth parameters H _ (2205) and H _ (2315) have strong ability to reflect the ore-forming environment (high-temperature hydrothermal environment and oxidation environment), but the ability to directly reflect the mineralized composition (Au-Cu) is not obvious.
【作者单位】：中国国土资源航空物探遥感中心;
【基金】：中国地质调查局项目(12120115039901)
【分类号】：O657.3;P618.51;P627

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