扎西康矿区独立金矿体金的赋存状态研究

发布时间：2018-03-02 06:02

本文关键词： 扎西康金矿体扫描电镜可见金显微极微粒金　出处：《矿物岩石》2017年04期 　论文类型：期刊论文

【摘要】：利用扫描电镜及能谱分析技术,对扎西康铅锌锑银多金属矿床内新发现的独立金矿体进行分析,以求查明该矿体载金矿物、金矿物赋存状态的特征。84件光薄片镜下观察与11件扫描电镜的结果表明,金以独立矿物相形式存在,为扫描电镜下可识别的"可见金",未发现晶格金。金的成分以自然金为主,其次为钯金矿、含银自然金、含汞自然金以及含镍自然金;金矿物粒径范围在0.001 mm~0.03 mm之间,主要为显微极微粒金(0.005~0.000 2),平均粒径为0.002 3mm,占66.67%;其次为显微微粒金(0.01mm~0.005mm),平均粒径为0.006 6mm,占24.24%;显微中粒金(0.05~0.02),平均粒径为0.025mm,占6.06%;显微细粒金(0.02~0.01),平均粒径为0.012mm,占3.03%。金矿物主要有以下三种嵌布特征:粒间金、包裹金、裂隙金。金主要赋存在黄铁矿、毒砂中(占79.79%),其次分布在硅酸盐矿物以及部分黏土矿物中(占21.21%)。通过与典型造山型、卡林型、浅成低温热液型金矿床进行对比,认为该矿体与浅成低温热液型金矿床矿体特征相似,扎西康地区应存在独立的浅成低温液型金矿床。
[Abstract]:By using scanning electron microscopy and energy spectrum analysis technology, independent analysis of the zhaxikang zinc antimony gold silver polymetallic deposit newly discovered in order to find out the ore, gold bearing minerals, the 11 scanning electron microscope observation and gold occurrence state of the characteristics of.84 optical microscope thin sections show that the presence of gold as independent mineral phase form, SEM identification of "visible gold", not found. Lattice gold gold component as natural gold, followed by palladium gold, silver bearing native gold, gold and mercury containing nickel gold; gold particle size in the range of 0.001 mm~0.03 mm, mainly for the microscopic particles of gold electrode (0.005~0.000 2), the average particle size of 0.002 3mm, accounting for 66.67%; followed by microscopic particles of gold (0.01mm~0.005mm), the average particle size of 0.006 6mm, accounting for 24.24%; micro grain gold (0.05~0.02), the average particle size is 0.025mm, accounting for 6.06%; micro fine gold (0.02~0.01), average particle size 0.012mm, accounting for 3.03%. gold deposits mainly in the following three shananbang: intergranular gold, gold, gold and fissure gold. They mainly exist in pyrite, arsenopyrite (79.79%), followed by distribution in silicate minerals and clay minerals (21.21%). With the typical orogenic type and Carlin type, shallow epithermal gold deposits were compared, the orebody and ore forming shallow epithermal gold deposit characteristics are similar, there should be low temperature liquid deposit shallow into independent zhaxikang area.

【作者单位】：成都理工大学;成都地质调查中心;
【基金】：中国科学技术部国家重点研发计划项目(2016YFC0600308) 中国地质调查局基础性公益性地质矿产调查项目(DD20160015)
【分类号】：P618.51

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