赣南茅坪钨矿床黄玉单晶流体包裹体研究

发布时间：2018-03-09 19:19

  本文选题：地球化学　切入点：黄玉单晶　出处：《矿床地质》2017年04期 　论文类型：期刊论文

【摘要】：文章以赣南茅坪大型钨矿床成矿早阶段形成的黄玉单晶为研究对象,对其中的流体包裹体开展了岩相学、显微测温以及激光拉曼光谱研究。结果显示,茅坪钨矿床黄玉单晶中的流体包裹体以富液两相包裹体为主,同时发育有单相包裹体、富二氧化碳的三相包裹体以及含子矿物包裹体。其中,含子矿物包裹体发育是本矿床黄玉中包裹体的重要特征,子矿物成分有方解石、石英、石盐等;流体包裹体的均一温度介于200~509℃之间,峰值位于420~500℃之间,盐度w(NaCl_(eq))为4.32%~19.22%,峰值介于17%~19%,较前人获得的石英脉型钨矿床成矿温度和盐度均高出许多,其峰值(420~500℃)在一定程度上衔接了石英脉型黑钨矿高温阶段的演化历史;黄玉单晶中包裹体还具有富含CO_2、CH_4、N_2等挥发分的特征。综上所述,笔者认为石英脉型钨矿的成矿流体在早阶段具有高温、中高盐度、富挥发分、富含多种离子的特征。
[Abstract]:Taking the Topaz single crystal formed in the early stage of mineralization of Maoping large tungsten deposit in southern Jiangxi as the object of study, the petrography, microthermometry and laser Raman spectroscopy of fluid inclusions were carried out. The fluid inclusions in Topaz single crystals of Maoping tungsten deposit are mainly liquid-rich two-phase inclusions with single-phase inclusions, carbon-rich three-phase inclusions and submineral inclusions. The development of submineral inclusions is an important feature of inclusions in topaz of the deposit. The submineral compositions include calcite, quartz, rock salt, etc. The homogenization temperature of fluid inclusions is between 200 鈩，

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