| 黑龙江三道湾子碲化物型金矿床流体包裹体及硫同位素研究 |
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| 引用本文：刘俊来,白相东,赵海滨,吕军,陈越,陈美勇.2010.Fluid inclusions and sulfur isotopes of Sandaowanzi gold telluride deposit, Heilongjiang Province[J].Mineral Deposits,29(3):476~488 |
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| 基金项目:国家自然科学基金项目（90814006）和黑龙江省地质调查院合作项目 |
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| 中文摘要:三道湾子金矿床是新近发现的一个典型的碲化物型浅成热液金矿床，金银以碲化物形式赋存于石英脉中。含矿石英脉中石英内流体包裹体的主要类型为液体包裹体，其气相分数大多集中在5%～15%。对应于早矿化阶段、主成矿阶段、晚矿化阶段的流体包裹体的均一温度分别为230～396℃；220～320℃（峰值260～280℃）；140～300℃（峰值180～240℃）。激光拉曼探针原位成分分析表明，各阶段流体包裹体的气、液相成分主要为H2O，部分气相含有甲烷、丙烷、丁炔等烃类；主成矿阶段的纯气体包裹体的成分为甲烷，其次为丙烷、丁炔等，可能是深源流体的启示。δ34S值在0附近，为较小的正值或负值，具有地幔硫的特征。上述分析揭示出，三道湾子金矿床是中低温热液矿床。伴随着早白垩世区域伸展作用期间的亚碱性火山作用，深源流体与大气水混合，促使热液携带的成矿物质在浅部地壳卸载、沉淀和结晶，并以裂隙充填占主导的成矿作用方式多阶段成矿。 |
| 中文关键词:地球化学 碲化物型金矿床 浅成中低温热液矿床 流体包裹体 硫同位素 三道湾子 黑龙江省 |
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| Fluid inclusions and sulfur isotopes of Sandaowanzi gold telluride deposit, Heilongjiang Province |
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| Abstract:The Sandaowanzi gold deposit is a newly discovered gold telluride deposit, in which gold and silver occur as tellurides in quartz veins. Liquid inclusions in quartz from the gold-bearing quartz vein are the dominant type of fluid inclusions. The gas-liquid ratio is mainly concentrated in the range of 5%～15%. The fluid inclusion homogenization temperatures are grouped into the early mineraliztion stage of 230～396℃, the main mineralization stage of 220～320℃ with the peak temperature at 260～280℃ and the late minealization stage of 140～300℃ with the peak temperature at 180～240℃. Laser Raman spectroscopy shows that the compositions of fluid inclusions are mainly H2O, partly with methane, propane, acetylene and other hydrocarbons. The pure gas inclusions of the main ore-forming stage are characterized by the dominant presence of methane, followed by propane, acetylene and other hydrocarbons, which may suggest mantle-derived fluids. The δ34S values of sulfur isotopes fall near 0, characteristic of mantle sulfur. The above data show that the Sandaowanzi gold deposit is an epithermal-mesothermal deposit. Ore-forming fluids genetically with mixed meteoritic and mantle sources contributed to gold telluride mineralization during sub-alkaline volcanism in an extensional tectonic setting. Open space filling and crack-sealing constitute the dominant mechanism of multi-stage mineralization. |
| keywords:geochemistry, gold telluride deposit, epithermal-mesothermal mineralization, fluid inclusions,sulfur isotope, Sandaowanzi, Heilongjiang Province |
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