新疆忠宝钨矿床成矿流体特征与演化  

Characteristics and evolution of ore-forming fluids in Zhongbao tungsten deposit,Xinjiang

作　　者：张振杰[1] 吕新彪[1,2] 陈超[1] 

机构地区：[1]中国地质大学资源学院,湖北武汉430074 [2]地质过程与矿产资源国家重点实验室,中国地质大学,湖北武汉430074

出　　处：《矿床地质》2011年第6期1058-1068,共11页Mineral Deposits

基　　金：“十一五”国家支撑计划项目(305)课题“东天山-北山成矿带整体研究与找矿靶区优选评价”(2007BA25B04)资助

摘　　要：文章对忠宝钨矿床矽卡岩和石英脉中白钨矿、石英、透辉石、萤石、方解石等矿物中的流体包裹体进行了研究，明确了成矿流体对其成矿的有利温度、盐度、压力及成矿深度，并佐证了划分的成矿期和成矿阶段，对每个阶段的成矿特征进行了对比，从而确定了流体的演化特征。最终判断忠宝钨矿床的最佳成矿温度区间为250～360℃，盐度w（NaClcq）区间为12％～15％，平均均一压力为90．73×10^5Pa，成矿深度为约1500～500m，显示出中高温矽卡岩型钨矿床的特征。Based on a study of the fluid inclusions of such minerals as scheelite, quartz, diopside, tluorite and calcite m skarn and quartz veins, the authors studied the favorable temperature, salinity, pressure and depth of the ore fluids in the Zhongbao tungsten deposit, and comparatively investigated ore-forming phases and stages and geo logical characteristics, thus determining the evolution features of the fluid. On such a basis, the authors finally ascertained that the best ore-forming temperature was from 250℃ to 360℃, the best ore-forming salinity was in the range from w（NaCleq）12% to w（NaCleq）15%, the homogenization stress was 90.73 × 10^5 Pa, and the ore-forming depth ranged from 1 500 m to 500 m. All of these data indicate that this ore deposit is a middle-high temperature skarn tungsten deposit.

关 键 词：地球化学 流体包裹体 均一法 流体演化 忠宝钨矿床 新疆 

分 类 号：P618.67[天文地球—矿床学]