不同石英脉型金银矿床中含矿石英脉的红外光谱对比

The comparison of infrared spectrum of quartz about different type of quartz vein AuAg deposits

为了探讨红外光谱方法评价石英脉型金银矿床的有效性,选择内蒙、吉林、山东等地的石英脉型金银矿床,对其含矿石英进行了红外光谱分析。根据石英包体片中H2O和CO2的吸光度值A1和A2与石英中Au、Ag的含量关系得出:在同一矿床中A1和A2与Au、Ag的含量呈正相关关系;但不同矿床的石英A1、A2与Au、Ag含量总体上无相关性。利用红外光谱方法评价石英脉含矿性的优越性在于避免了直接测金,而消除了金的测不准性对评价结果的影响。同时,该方法有其局限性,即不同矿床不能采用同一评价标准,只适用于就矿找矿。

For discussing effectiveness of using infrared spectrum of quartz to evaluate the AuAg bearing quartz veins, the authors have selected some quartz veins from several AuAg deposits from Shandong,Inner Mongolia and Jilin Provinces and tested their infrared spectrum of quartz. It has been found that the absorbing degree of H_2O(A_1) and CO_2(A_2) of quartz are directly proportional to their Au and Ag contents in quartz in same a AuAg deposit. However, the rule does not apply to different AuAg deposits. It seems better using the absorbing degree of H_2O(A_1) and CO_2(A_2) of quartz to evaluate the AuAg quartz veins than using the AuAg contents of quartz directly, for the former does not affected by the uncertainty of AuAg content measurement of these quartz veins. The limitation to the method of evaluation is that no unified standard can be applied to different AuAg deposits. The method is especially useful to the ore-searching at nearby or at deeper portion of a known AuAg deposit.