石英的电子顺磁共振波谱在金矿评价中的应用

The Application oF EPR Spectra of Quartz to the Evaluation oF Gold Ore Deposits

本文研究的是昔遍存在于石英样品中的O--AI空穴心和E心。根据石英中O--AI心和E心的电子顺磁共振波谱随石英脉形成温度变化的特征,可间接地推测主成矿阶段。石英的O--AI心强度与矿石含金量呈正相关关系,相关系数γ=0.61(a=0.01)。在4个钻孔中,石英的O--AI心强度与含金量具有相同的变化趋势。石英的O--AI心强度与含金量的这种正相关关系可作为金矿床成矿预测及找矿评价的标志之一。

The present paper deals with the O--A1 center and Ecenter in quartz, which can be used to deduce indirectly the major ore-forming stage according to the variation in the EPR spectra of quartz with the formation temperature of quartz veins.Calculated result using the data of EPR spectra of quartz indicates that the intensities of O^--Al center show a positive correlation with the corresponding gold content of quartz veins with a correlation coefficient γ=0.61 (a=0.01). The intensities of O^--Al center of the quartz veins from 4 drill holes have similar variation patterns to those of corresponding gold contents.The positive correlation of the O^--Al center of quartz with the gold content can be regarded as an indicator of ore-potential in ore prognosis and prospecting.