河南刘山岩铜锌型块状硫化物矿床流体包裹体研究  

FLUID INCLUSIONS OF THE COPPER-ZINC TYPE MASSIVE SULFIDE DEPOSIT IN LIUSHANYAN,HENAN PROVINCE

作　　者：韦昌山[1] 杨振强[1] 战明国[1] 

机构地区：[1]宜昌地质矿产研究所,湖北宜昌443003

出　　处：《华南地质与矿产》2002年第2期47-53,共7页Geology and Mineral Resources of South China

基　　金：国家自然科学基金项目 ( 4 980 2 0 0 9)

摘　　要：应用显微测温技术所获得的石英流体包裹体资料 ,揭示刘山岩铜锌型硫化物矿床喷流成因的流体包裹体特点。测试结果表明 ,矿石中含有丰富的CO2 气、液包裹体 ,均一温度变化范围较大。块状矿石流体包裹体均一温度为 12 5～ 2 85℃ ,属中 -低盐度 (9.9%～ 12 .6 % ) ,而糜棱岩化浸染状矿石流体包裹体的均一温度为 135～ 2 5 0℃ ,也属中 -低盐度。少数浸染状矿石流体包裹体均一温度为 2 75～ 310℃ ,属中 -高盐度 (17.7%～ 2 2 .3% ) ,其似乎指示热卤水系统中网脉状矿体形成于热卤水供给筒或喷溢口附近 ,而块状矿石则是层状矿体部分。然而 ,不含矿的脉石英所含流体包裹体的均一温度仅限于 145～ 175℃ ,盐度 10 .2 %～ 12 .9% ,不含CO2 气、液包裹体。资料显示 ,该矿床与成矿作用有关的热卤水为中至中 -高盐度 ,属中至中 -高温的NaCl-H2 O -CO2 体系。Research of fluid inclusions within quartz shows that the Liushanyan Cu-Zn deposit is a submarine volcano-exhalative type of massive sulfide deposit. Microthermometric data reveals that fluid inclusions usually contain abundant gas and liquid phase of CO_2 inclusions in ores with larger range of homogenization temperatures: fluid inclusions in massive ores yield homogenization temperatures ranging from 125 to 285℃ with mid-low salinity (9.9%～12.6%), while mylonitized disseminate ores have a homogenization temperatures from 135 to 250℃ and some minor disseminate ores have a higher homogenization temperatures ranging from 275 to 315℃ with moderate salinity(17.7%～22.3%), which seem to indicate that the disseminated stockwork ore-bodies formed at the feeder pipes or near discharge vents of hot-brine system and the massive ores seem to represent the layered ore-bodies above the discharge vents. However, the homogenization temperature of fluid inclusions in the non-mineralized quartz veins range from 145 to 175℃ and their salinity change from 10.2% to 12.9% with no gas phase or liquid phase CO_2 inclusions. Therefore, the hot-brines related to mineralization have moderate to mid-high temperatures and moderate to mid-high salinity belonging to NaCl-H_2O-CO_2 brine system.

关 键 词：流体包裹体 铜锌矿床 块状硫化物矿床 河南 显微测湿技术 成矿作用 

分 类 号：P618.41[天文地球—矿床学] P618.43[天文地球—地质学]