玲珑金矿大开头矿区金的赋存特征及其成因意义

金赋存状态的研究，不仅可为金矿选冶提供技术参数，还有成因和化探等方面的意义。通过玲珑金矿大开头矿区金及主要矿石矿物的电子探针分析，显示出金只以独立金矿物相形式；金矿物主要为银金矿和含银自然金；金矿物以裂隙金、粒问金和包体金存在于黄铁矿或石英等颗粒中，但主要是存在于黄铁矿的裂隙中和硫化物与石英之间的晶体间隙中。金矿形态有极细的脉状、角砾状、麦粒状、浑圆粒状和不规则粒状等；粒状金矿物粒度细小、多在10μm左右；细脉状金的脉宽多在1-5μm之间。以黄铁矿为主的硫化物化学成分中几乎不舍金，金仅呈独立金矿物相。根据金与硫化物和石英的相嵌关系，探讨了本区金成矿作用过程。

Gold Occurrence Characteristics and Their Genetic Significance in Dakaitou District of Linglong Gold Ore-deposit

Studying on the occurrence Characteristics of gold, not only can provide some important parameters for the gold metallurgy, but also have the significances on genesis and the geochemical exploration. By means of the electron probe micro-analyses （EPMA） of gold minerals and other main ore-minerals, the results show that gold occurs just in the independent mineral phase, and gold in the ore is mainly the silver-gold mineral and the silver- bearing native gold mineral. The gold exists in pyrite and quartz particles in the forms of the fissure gold, inter-crystalline gold and inclusion gold. Gold is mainly present in the cracks of pyrite, and the gap between quartz and sulfides. Gold shape has the extremely thin veins, brecciated, grain shape, rounded granular and irregular granu- lar. The granular gold minerals are very small, and their diameters are often no more than 10 μm. The width of gold thin vein are mainly in the range of 1 - 5 μm. But there is almost no gold in the chemical compositions of py rite and other sulphide, and gold is only the independent mineral phase. According to the embedded relationship between gold and sulphide and quartz, the paper has discussed the evolution history of gold mineralization in this area.