宁夏二人山银铅矿床成矿流体地球化学特征及演化  

Geochemical Characteristics and Evolution of Ore-forming Fluids for the Errenshan Ag-Pb Deposit in Ningxia

作　　者：邹武建 汪栋刚 王忠禹 陆茂欣 ZOU Wu-jian;WANG Dong-gang;WANG Zhong-yu;LU Maoxin(Ningxia Institute of Geology and Mineral Exploration,Yinchuan 750021;Ningxia Institute of Geological Survey,Yinchuan 750021)

机构地区：[1]宁夏地质矿产勘查院,宁夏银川750021 [2]宁夏地质调查院,宁夏银川750021

出　　处：《四川地质学报》2021年第2期322-325,共4页Acta Geologica Sichuan

摘　　要：宁夏卫宁北山地区二人山银铅矿是宁夏境内最典型、规模最大的银铅锌多金属矿床,矿体主要赋存于F18构造破碎带中。通过对与矿化密切共生的重晶石中的流体包裹体岩相学及显微测温分析,H_(2)O-CO_(2)三相包裹体均一温度为107℃~287℃,盐度变化范围为0.41%~12.05%;CO_(2)三相包裹体均一温度为30.2℃;富液体包裹体均一温度为95℃~248℃,盐度为2.07%~23.18%。成矿流体具有中低温、中高盐度的特征,流体为SiO_(2)-H_(2)O-CO_(2)-SO_(4)^(2-)多相含矿(Zn^(2+)、Pb^(2+)、Fe^(3+)和Ag^(+)等)。The Errenshan Ag-Pb Deposit in Weining,Ningxia is the largest and mostly typical Ag-Pb polymetallic deposit in Ningxia.The orebodies are confined to the structure fracture zone F18.The ore-forming fluids are SiO_(2)-H_(2)O-CO_(2)-SO_(4)^(2-)fluids,containing Zn^(2+),Pb^(2+),Fe^(3+)and Ag^(+).The homogenization temperature of three-phase fluid inclusions varies from 107℃ to 287℃ with the salinity of 0.41 wt% NaCl equiv.to 12.05 wt%NaCl equiv.The homogenization temperature of three-phase CO_(2)inclusion is 30.2℃.The homogenization temperature of fluid-rich inclusion varies from 95℃ to 248℃ with the salinity of 2.07 wt% NaCl equiv.to 23.18 wt% NaCl equiv.

关 键 词：流体包裹体 二人山 卫宁北山 宁夏 

分 类 号：P595[天文地球—地球化学]