相山矿田邹家山矿床典型蚀变矿物光谱特征

Spectrogram of Main Altered Minerals of the Zoujiashan Uranium Deposit in the Xiangshan Ore Field

相山矿田是中国迄今为止发现的最大的铀矿床,受到裂隙构造控制,矿田内围岩蚀变强烈。主要蚀变类型有水云母化、萤石化和赤铁矿化。岩石中矿物的反射率随着波长变化而变化形成反射光谱曲线,而不同蚀变矿物具有不同的反射光谱特征。利用SVC HR-768光谱仪对从相山取得的岩石样品进行光谱曲线测量,得到主要蚀变矿物在可见光-近红外波段下的光谱曲线特征,对比分析得出影响蚀变矿物反射率大小的主要因素,并建立相对应的识别光谱模型,为铀矿的找矿提供一些理论依据。

The Xiangshan ore field is the largest one in China so far.It is controlled by structure.Strong wallrock alterations such as hydromicazation,fluoritization and hematitization are well developed in the Zoujiashan uranium deposit.Reflectance of minerals changes with wavelength and different altered minerals differ in reflectance spectrum.Spectrum curves of main altered minerals under visible light to near infrared band are obtained by SVC HR-768spectrometer.This study deals with main factors to have an influence on reflectance of altered minerals in the Zoujiashan uranium deposit and establishes corresponding spectrum models which provide theoretic basis for searching for uranium deposit.