西秦岭寨上特大型金矿床黄铁矿特征及其含金性研究

寨上金矿中黄铁矿是主要的载金矿物之一。围岩中黄铁矿呈草莓状、莓球状、圆球状和立方体等晶形，颗粒相对较细小。矿石中黄铁矿呈立方体、五角十二面体、他形粒状及细网脉状，颗粒相对较粗。寨上金矿黄铁矿化学成分总体呈贫铁ｗ（Fe）=45.98%,贫硫w（S）= 51.69%，As、Sb等替代S，Co、Ni、Ag等替代Fe，Au呈独立矿物形式存在于黄铁矿中。草莓状和立方体黄铁矿含金性较差，他形粒状、细脉状及五角十二面黄铁矿含金性较好。不同晶形黄铁矿中Au与As呈负相关性。具有增生环带铁矿的第一 、三、五环带含Au、As较高，而内核、第二、四、六环带中Au、As较低，Au与As呈正相关性。

Research on the Characteristics of Pyrite and its Gold-bearing Properties of Zhaishang Oversized Gold Deposit in Western Qinling

Pyrite is one of the main Au-carriers in the Zhaishang gold deposit.The pyrite in the rock are fine and strawberry-like or coccus-like,globe-like,cube-like pyrite.The pyrite in the rock are thick and big,mineral form as cube,pyritohedron,xenomorphic granular,small veins.Pyrites of mineralization are poor in iron（Fe）=45.98%,sulfur（S）= 51.69%.S has been replaced by As,Sb,Fe has been replaced by Ni、Ag.The mode of occurrence of Au is self-existent in the pyrites.Au-carriers in the those strawberry-like,cube-like pyrite less than in those pyrites mineral form as cube,pyritohedron,xenomorphic granular,small veins.Au,As has the negative correlation characteristic feature in different pyrite.Those pyrites as overgrowth rim,in the first rim,third rim,fives rims are rich of gold,while in the core,second rim,fourth rim,and sixth rim are poor of gold,the relationship between Au and As is positive correlation.