卤素在银成矿中的作用——以额仁套勒盖大型银矿床为例

The role of halogen in sliver mineralization:A case study of the large Eren Tolgoi silver deposit

通过对额仁套勒盖银矿床卤素和Ag的研究,发现卤素在银矿床中具有明显的水平和垂直分带现象,地表和近地表矿石相对富Cl和I,深部矿石相对富F;矿体中相对富Cl和I,近矿围岩中相对富F。卤素与Ag有密切的关系。但是矿石类型不同,卤素与Ag的关系也不同,F与Ag多为负相关,Cl与Ag,I与Ag多为正相关。表明卤素在银的活化、溶解、长距离迁移和沉淀富集过程中可能起着非常重要的作用。

Study of halogen and silver in the Eren Tolgoi sliver deposit indicates that halo gen shows lateral and vertical zoning.Ores on and near the surface are rich in I and Cl ,while deep-seated ones rich in F;the ore body is rich in I and Cl ,while the country rocks adjacent to ores are rich in F.There are close relationships between halogen and sliver.But the relationship between sliver and halo gen differs with different ores type.F and Ag generally show a negative correlation,while Cl and Ag ,I and Ag show a positive correlation.This in dicates that halogen plays a very important role in activa tion,dissolu tion,long transport,precipitation and concentration of silver.