陕西凤县马蹄沟金矿床金的赋存状态研究

马蹄沟金矿床为一典型的微细浸染型金矿床,通过显微镜观察、化学分析、能谱分析等综合分析技术对该矿床中金的赋存状态进行了详细研究。结果表明:该矿床中金主要为自然金,部分为银金矿,成色变化大(650.9~894.7);嵌布状态以硫化物包裹金为主,裂隙金、粒间金较少;载金矿物主要为黄铁矿、闪锌矿、石英、毒砂;金矿物粒度多为显微金,个别为细粒金。对金的赋存状态的研究为探讨矿床成因及选矿工艺设计提供了依据。

Study on the occurrence of Matigou Gold Deposit in Fengxian County,Shaanxi Province

The Matigou Gold Deposit is a typical fine grain disseminated gold deposit.Systematic laboratory study such as microscope observation,mineral phase analysis and energy dispersive analysis were conducted to investigate the occurrence of gold in the deposit.The results showed the gold existed mainly as native gold and partly as electrum with the fineness varying from 650.9 to 894.7; as for the embedding,there were mostly sulfide inclusions and little fissure gold or intergranular gold;the carriers were mainly pyrite,sphalerite,quartz and arsenopyrite;the gold granu-larity is mainly characterized by micro particulate and a small amount of fine gold.The research on the occurrence of gold will provide reference for the discussion of deposit genesis and the design of mineral processing processes.