摘要
石硐沟银铅锌多金属矿床是近年在北祁连西段发现的一处大型银铅锌多金属矿床,本文在详细的光、薄片鉴定分析基础上,对其矿石矿物进行了系统研究。研究表明,主要金属硫化物有闪锌矿、方铅矿、黄铁矿和黄铜矿,主要载银矿物为银锑黝铜矿。根据矿床地质特征、矿物共生组合及相互穿插关系,将该矿床分为原始沉积期、热液改造成矿期和表生期3个成矿期次。矿床成因为与晚奥陶世野牛滩花岗闪长岩侵入体有关的岩浆-热液叠加改造层控矿床。
The Shidonggou Ag-Pb-Zn polymetallic ore deposit is a large-size ore deposit in north Qilian west part. Its ore minerals were systematically studied on the basis of thin section and polished section microscope observation for the first time in this paper. The results showed that the main metal sulfides include sphalerite, galena, pyrite and chalcopyrite. Tet- rahedrite is the main Ag-bearing mineral. According to the geological features, mineral characteristics and penetration rela- tionship of minerals,the metallogenic period can be divided into three metallogenic periods, that is primary sedimentary peri- od, hydrothermal transformation metallogenic period, and oxidation period. This polymetallic ore deposit is a hydrotherrnal superimposed deposit related to Yeniutan intrusive rock.
出处
《新技术新工艺》
2014年第1期105-109,共5页
New Technology & New Process
关键词
石硐沟
矿物特征
成矿期次
叠加改造层控型
Shidonggou, mineral characteristics, rnetallogenic period, superimposed and re{ormed strata bound type
