河南省东沟钼矿的成矿流体性质及沉淀机制探讨  

Properties of ore-forming fluid and the precipitation of Mo of Donggou deposit,Henan province

作　　者：游水凤 柳汉丰[1] 刘素楠[1] 

机构地区：[1]江西应用技术职业学院,江西赣州341000

出　　处：《中国矿业》2014年第5期90-93,共4页China Mining Magazine

摘　　要：东沟斑岩钼矿的成矿流体早期具有高温、高盐度,晚期温度及盐度均降低的特征。主成矿阶段石英-辉钼矿阶段的形成压力为18M^95MPa,对应的成矿深度为0.7~3.7km。东沟钼矿的成矿流体含有CH4、C6H6等还原性气体,且流体的氧逸度及pH值从成矿早阶段到晚阶段具有依次降低的趋势,表明东沟钼矿的主成矿阶段,成矿流体处于一种相对还原的环境,且流体的沸腾作用是导致钼矿沉淀的重要机制之一。The ore-forming fluids of Donggou Mo deposit physical-chemically changed from high temperature and salinity of the earlier stages to low temperature and salinity of the later stages .The mineralization pressure and depth of the quartz-molybdenite stage are from 18 to 95M Pa and from 0 .7 to 3.7km .The low content of CH4 and C6 H6 ,and the oxygen fugacity ,pH values and Eh values decreased from early stage to the late stage ,suggesting a weak reducing environment when the Mo elements precipitating . The boiling of the fluid may change the physicochemical properties of ore-forming fluid and resulted in the precipitation of Mo .

关 键 词：东沟 成矿流体 成矿压力 氧逸度 pH值 沸腾作用 

分 类 号：P618.51[天文地球—矿床学]