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柯月锌多金属矿床是北喜马拉雅锑金多金属成矿带上新发现的重要矿床。矿体主要呈脉状、透镜状产于近南北向张扭性断裂中,金属矿物主要有方铅矿、闪锌矿、辉锑矿、脆硫锑铅矿、硫锑铅矿、黄铁矿、毒砂、黄铜矿等,非金属矿物主要有石英、铁锰碳酸盐、方解石等。矿石组构以热液充填交代成因为主。流体包裹体初步研究表明,包裹体以液体包裹体为主,还有少量纯气体和纯液体包裹体。成矿流体为中低温、中低盐度、低密度H2O-Na Cl体系。流体中气液成分以H2O为主,液相中局部含有少量的HCO-3、CO2-3和CO2,气相中局部有少量CO2、CH4、N2。根据含矿石英脉中绢云母40Ar-39Ar定年,准确限定柯月矿床成矿热液活动的时限为21.3 Ma。矿床地质特征表明,柯月为中低温热液脉状锌多金属矿床,是后碰撞造山成矿作用的产物。
Keyu zinc polymetallic deposit is a newly discovered important deposit on the antimony gold polymetallic metallogenic belt in the Northern Himalayas. The ore body is mainly vein-shaped and lenticular in the near-north-north tensile-torsional fracture. The metalloids mainly include galena, sphalerite, stibnite, jasperite, stibnite and pyrite , Arsenopyrite, chalcopyrite and other non-metallic minerals are mainly quartz, ferromanganese carbonate, calcite and so on. Ore composition to hydrothermal filling account for the main reason. Preliminary studies of fluid inclusions show that the inclusions are mainly fluid inclusions, with a small amount of pure gas and pure liquid inclusions. The ore-forming fluid is medium-low temperature, low-salinity, low-density H2O-NaCl system. The gas-liquid composition in the fluid is mainly H2O, with a small amount of HCO-3, CO2-3 and CO2 locally in the liquid phase and a small amount of CO2, CH4 and N2 in the gas phase. According to the dating of sericite 40Ar-39Ar in the quartz vein containing ore, the time limit for accurately defining the hydrothermal activity of the Ke-Yue deposit is 21.3 Ma. The geological characteristics of the deposit indicate that Ke-Moon is a medium- and low-temperature hydrothermal vein-like zinc-polymetallic deposit and is the product of post-collision orogeny mineralization.