HySpex成像光谱技术矿床深部成矿规律研究

HySpex Imaging Spectroscopy Techniques Study of Deep Mineralization Pattern of Mineral Deposits

由于特殊的岩体特性,深部铀矿成矿规律复杂。为了提高对深部矿床蚀变发展规律的勘探精度,将HySpex成像光谱技术应用于钻孔岩芯蚀变的解译。结合钻孔的空间地理信息参数,形成钻孔在不同深度的蚀变数据模型,对某铀矿深部成矿规律进行精细化分析与预测。研究发现:研究区蚀变标志矿物主要为伊利石、绿泥石和碳酸盐类;长波反射光谱是一个重要信号,可作为寻找深部铀矿的重要标志;短波中伊利石是最为强烈的铀矿成因信号。研究区铀矿发育受断裂构造交互影响作用强烈,深部铀矿找矿工作应重点关注这一现象。断裂交互构造影响中的不连续性是形成铀矿的重要光谱特征。这一特点能够为我国深部铀矿精细化勘探手段提供一定参考。

Due to the special rock properties,the deep uranium ore mineralization pattern is complex.In order to improve the exploration accuracy of alteration development pattern of deep deposits,HySpex imaging spectroscopy technology is applied to the interpretation of alteration of drill hole cores.Combined with the spatial geographic information parameters of the drill holes,the alteration data models of the drill holes at different depths are formed to refine the analysis and prediction of the deep mineralization pattern of a uranium mine.It is found that:the alteration marker minerals in the study area are mainly illite,chlorite and carbonates;the long-wave reflection spectrum is an important signal,can be used as an important symbol for finding deep uranium ore;illite is the strongest signal for uranium ore genesis in short wave.The uranium ore development in the study area is strongly influenced by fracture-tectonic interaction,and the deep uranium ore search should focus on this phenomenon.The discontinuity in the fracture interaction tectonic influence is an important spectral feature in the formation of uranium ore.The feature can provide centain reference for the means of deep uranium ore refinement exploration in China.