西秦岭寨上特大型金矿金的赋存状态研究

Study on Gold Occurrence in Zhaishang Large Type Gold Deposit in West Qinling

利用显微测试技术,发现寨上金矿金的赋存状态有3种:一是金呈微包裹体形式或呈类质同像替代的原子形式存在于载金矿物中,呈晶格金;二是自然金赋存在石英和高岭石等碎屑粒间,形成粒间金;三是自然金赋存在石英方解石重晶石脉中,呈裂隙金。从金的赋存状态形成的原因,结合寨上金矿形成的构造演化过程,赋矿地层、岩性和岩相学特征,认为寨上金矿的成因类型应为沉积变质—构造热液叠加型金矿床。

Use of micro-testing technology,found gold occurrence in zhangshang gold deposit in three ways： First,gold was micro inclusions or were isomorphous substitution of atoms existed in the lattice of gold-gold minerals were;two is a natural gold occurrence in quartz,kaolinite and other debris between the gold particles formed between grains;Third,the existence of natural quartz gold endowed was calcite barite veins in the fissures.From the Gold Occurrence of the Causes,combined gold deposit tectonic evolution of ore formation,lithology,petrography,we believe that the deposit type gold deposit should be deposited metamorphic-tectonic hydrothermal superposition type gold deposit.