金厂峪金矿典型矿脉中金、银的化学相态分析  

Chemical phase analysis of Au and Ag in typical veins of Jinchangyu gold deposit

作　　者：陆继龙[1] 刘洋[1] 侯亚茹 范玉超 汤肖丹 LU Ji-long;LIU Yang;HOU Ya-ru;FAN Yu-chao;TANG Xiao-dan(College of Geo-exploration Science and Technology,Jilin University,Changchun 130026,China)

机构地区：[1]吉林大学地球探测科学与技术学院,长春130026

出　　处：《世界地质》2021年第1期65-74,共10页World Geology

基　　金：国家重点研发计划项目(2016YFC0600606);国家公益性行业科研专项(201311171-2)资助。

摘　　要：采用石墨炉原子吸收光度计对金厂峪金矿区4条典型矿脉的金、银化学相态含量进行测定,分析了金、银的化学相态的含量分布特征及相关关系。实验结果表明:各条矿脉围岩中金、银含量相近,矿石中金的含量高低依次为Ⅳ矿脉、Ⅲ矿脉、Ⅱ矿脉、Ⅴ矿脉,银的含量高低依次为Ⅱ矿脉、Ⅳ矿脉、Ⅲ矿脉、Ⅴ矿脉;金在围岩、矿石中的主要化学相态分别为硅酸盐态、游离自然金,银在围岩和矿石中的主要化学相态为硅酸盐态;金的游离自然金、碳酸盐态为金的成矿有利相态,银的氯化银态、自然银态对成矿具有指示意义;岩石中金的化学相态特征可指导地球化学找矿,为岩石地球化学的异常评价提供依据。In this paper,the graphite furnace atomic absorption section spectroscope was used to determine the chemical phases content of Au and Ag of the four typical veins in the Jinchangyu gold deposit.And the distribution characteristics and correlation of the chemical phase states of Au and Ag were analyzed.The results showed that the content of Au and Ag in the surrounding rocks of each vein had little difference.IV vein had the highest content of Au in the ores,followed by III vein,II vein and V vein.AndⅡvein had the highest content of Ag in the ores,followed byⅣvein,Ⅲvein and V vein.Silicate state and free natural state were the main chemical phases of Au in the surrounding rocks and ores,respectively.And silicate state was the main chemical phase of Ag in both surrounding rocks and ores.The free natural state and carbonate state of Au were favorable phases for gold mineralization.AgCl state and free natural state of Ag had indicative significance for mineralization.The chemical phase distribution characteristics of Au in rocks can guide geochemical prospecting and provide basis for abnormal evaluation of rock geochemistry.

关 键 词：化学相态 金 银 金厂峪金矿 

分 类 号：P578.11[天文地球—矿物学]