河南洛宁段河金矿流体包裹体研究和矿床成因

河南省洛宁县段河石英脉型金矿主要包括石寨沟和岭东两个矿区，分别由3～4条含金石英脉构成。矿化过程从早到晚包括石英-黄铁矿、石英-多金属硫化物和石英-碳酸盐等3个阶段．其中中阶段金矿化最强，次为早阶段。各阶段石英中流体包裹体以气液两相包裹体为主．次为纯液体包裹体。激光拉曼测试表明，气液两相包裹体的液相为H2O，气相主要为Ho和CO2混合、纯H2O，次为纯CO2；纯液体包裹体为纯H2O。石寨沟矿区包裹体均一温度从早到晚依次为240．9～315．9℃．188．7～304．5℃，137．3～259．3℃：流体盐度变化依次为（6．74～12．85）wt%NaCl．eq，（2．41～8．68）wt％NaCl．eq，（2．24-7．86）wt%NaCl．eq。岭东矿区均一温度从早到晚依次为303．7-343．1℃，251．8-325．4℃，305．7～355．0℃：流体盐度变化依次为（5．11～11．70）wt％NaCl．eq，（2．74-10．11）wt％NaCl．eq，（0．53-6．74）wt％NaCl．eq。两矿区主成矿期流体均为中温、低盐度，早阶段流体为改造热液和变质热液的混合体，含一定量CO2，且流体CO2含量和盐度从早到晚逐渐降低。石寨沟矿区包裹体均一温度逐渐降低，而岭东矿区包裹体均一温度先降后升，加之岭东矿区各阶段成矿温度均高于石寨沟矿区．表明成矿流体系统主要受岩浆热驱动，岭东矿区更靠近岩体，且在晚阶段又有脉动性的岩浆加热．段河金矿区南部存在隐伏岩体。

Study of fluid inclusions and ore genesis of the Duanhe gold deposit in Luoning County, Henan Province

The Duanhe gold deposit is a quartz -vein type gold deposit,located in Luoning County,Henan Province.The gold deposit mainly includes Shizhaigou and Lingdong mining areas that comprise of three to four gold-bearing quartz veins,respectively.The ore-forming process includes three stages,i.e.the early,middle and late stages,characterized by mineral assemblages of quartz -pyrite,quartz -polymetallic sulfides and quartz -carbonate,respectively.The most intensive gold mineralization is developed in the middle st...