新疆富蕴县克乃特糜棱岩带铜金矿化流体特征  

Mineralized Fluids Characteristics of Cu-Au Ore District in Kenaite Mylonite Belt of Fuyun,Xinjiang

作　　者：卫晓锋[1] 阴元军[1] 刘泽群[2] 杨凯[3] 徐九华[3] 程志龙[1] 丁汝福[1] 

机构地区：[1]北京矿产地质研究院,北京100012 [2]北京市地质矿产勘查开发总公司,北京100000 [3]北京科技大学资源工程系,北京100083

出　　处：《西北地质》2015年第3期262-270,共9页Northwestern Geology

基　　金：中国地质调查局矿产调查项目"新疆富蕴县克乃特铜多金属矿调查评价"(1212011085020)

摘　　要：研究区位于新疆麦兹盆地东南部的可可塔勒铅锌成矿带。对与铜金矿化关系密切的石英脉中流体包裹体研究发现:其均一温度集中在160~200℃,盐度为0.18%~8.41%,流体密度为0.79~1.04g/cm^3,主要成分为H_2O、CO_2,少量CH_4,流体来源于变质流体,混入少量大气降水。铜金矿化期成矿流体为中低温、中低盐度、中低密度、富CO_2的变质流体,与洋陆俯冲体制下弧后盆地的VMS型铅锌矿化期的中低温、低盐度、低密度、几乎不含CO_2的海水流体明显不同。显示该地区存在晚期与造山-变质热液作用有关的成矿事件,对本区的找矿评价具有启示意义。The study area is located in Keketale Pb-Zn metallogenic belt in southeast of Maizi ba- sin, Xinjiang. Studies on aqueous fluid inclusions in the quartz veins related to Cu-Au mineraliza- tion demonstrate that the total homogenization temperatures are concentrated in the range of 160- 200 ℃, while the salinity is 0.18%-8.41%, the fluid density is 0.79-1.04 g/cm3 , and the fluid inclusions components are mainly H20 and CO2, with minor CH4. The fluids were derived from metamorphic fluids and mixed with a little meteoric water. The fluids of Cu-Au mineralization pe- riod were metamorphic fluids with medium-low temperatures, medium-low salinities, mediumlow density and CO2 enrichment. The metallogenic fluids are different from the marine water fluids of VMS Pb-Zn mineralization period from the ocean-continental subduction back-arc basin, whose features are medium-low temperatures, low salinities, low density and hardly contain any CO2. It shows that this region did exist later-fperiod metallogenic events related to orogenic-met- amorphic hydrothermal process, which has enlightening significance for prospecting evaluation in this area.

关 键 词：成矿流体 铜金矿化 麦兹盆地 

分 类 号：P588.33[天文地球—岩石学] P618.41[天文地球—地质学]