论文部分内容阅读
位于西秦岭礼(县)—岷(县)成矿带西段的寨上金矿床,是近年发现的1个大型微细浸染型金矿。寨上金矿床的矿石建造可分为氧化矿石和原生矿石两大自然类型。其中原生矿石建造又可分为6种:碎裂岩型、碎裂岩化碳质板岩型、碎裂岩化粉砂质及泥质板岩型、碎裂岩化灰岩型、钙质板岩型和强硅化蚀变角砾岩型。根据热液矿脉中矿物特点,可将矿石中矿物共生组合分为少硫化物—石英类、含As黄铁矿—毒砂—石英类、多金属硫化物—石英—白钨矿—方解石类和少硫化物—碲化物—碳酸盐类。在矿床形成过程中,深源热液参与可能对金的活化迁移起到重要作用,构造体制转换使流体稳定体系发生改变而造成金的富集成矿。矿床成因属于中低温热液矿床。
Located in West Qinling Li (County) - Min (County) metallogenic belt west of Zhaishang gold deposits, found in recent years, a large fine disseminated gold mine. Zhaishang gold deposit ore can be divided into two types of natural ore and ore. Among them, the native ore can be divided into 6 types: cataclastic rock type, fractured rock carbonaceous slate type, fractured rock type silty sandstone and shale rock type, fractured rock limestone type, calcareous rock type Slate and strongly silicified altered breccia types. According to the characteristics of the minerals in the hydrothermal veins, the mineral assemblages in the ore can be divided into the following types: small sulfide-quartz, As pyrite-arsenopyrite-quartz, polymetallic sulfide-quartz-scheelite-calcite Less sulfide - telluride - carbonate. In the process of ore deposit formation, deep-hydrothermal fluid participation may play an important role in the activation and migration of gold. The structural system transformation changed the stable system of fluid and resulted in the enrichment and mineralization of gold. Genesis of the deposit belongs to the low-temperature hydrothermal deposit.