| 新疆忠宝钨矿床成矿流体特征与演化 |
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| 引用本文：张振杰,吕新彪,陈超.2011.Characteristics and evolution of ore-forming fluids in Zhongbao tungsten deposit, Xinjiang[J].Mineral Deposits,30(6):1058~1068 |
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| 基金项目:本文得到“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 |
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| 中文摘要: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(NaCleq) 区间为12%～15%，平均均一压力为90.73×105 Pa，成矿深度为约1 500～500 m，显示出中-高温矽卡岩型钨矿床的特征。 |
| 中文关键词:地球化学 流体包裹体 均一法 流体演化 忠宝钨矿床 新疆 |
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| Characteristics and evolution of ore-forming fluids in Zhongbao tungsten deposit, Xinjiang |
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| Abstract:Based on a study of the fluid inclusions of such minerals as scheelite, quartz, diopside, fluorite and calcite in 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 geological 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 90.73×105 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. |
| keywords:geochemistry, fluid inclusions, uniform temperature method, fluid evolution, Zhongbao tungsten deposit, Xinjiang |
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