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内蒙古格鲁其堆山铅锌矿床地质特征及流体包裹体研究

  • 刘丽君|张悦|闫永生
  • 作者单位:
  • 中国地质调查局哈尔滨自然资源综合调查中心&自然资源部哈尔滨黑土地地球关键带野外科学观测研究站|中国地质调查局哈尔滨自然资源综合调查中心&自然资源部哈尔滨黑土地地球关键带野外科学观测研究站|中国地质调查局哈尔滨自然资源综合调查中心&自然资源部哈尔滨黑土地地球关键带野外科学观测研究站
  • 基金项目:

  • 中国地质调查局项目(12120115041801);原武警黄金指挥部黄金工作专项(2008-20140301)
  • 详细信息:

  • 作者简介:
  • 刘丽君(1996—),女,助理工程师,从事地质信息及地质资料管理工作;E-mail:3478236160@qq.com
  • 通讯作者:
  • isnull
  • PDF下载

Study of geological characteristics and fluid inclusions of Geluqiduishan Pb-Zn Deposit in Inner Mongolia

  • English Author:
  • Harbin Center for Integrated Natural Resources Survey,China Geological Survey&Observation and Research Station of Earth Critical Zone in Black Soil,Harbin,Ministry of Natural Resources|Harbin Center for Integrated Natural Resources Survey,China Geological Survey&Observation and Research Station of Earth Critical Zone in Black Soil,Harbin,Ministry of Natural Resources|Harbin Center for Integrated Natural Resources Survey,China Geological Survey&Observation and Research Station of Earth Critical Zone in Black Soil,Harbin,Ministry of Natural Resources
  • Unit:
  • 摘要
  • 在线预览
  • 参考文献

摘要:

格鲁其堆山铅锌矿床是近年来新发现具有较大找矿潜力的铅锌矿床,位于得尔布干断裂中段西侧,矿化体赋存于额尔古纳河组、佳疙疸组等地层中,铅锌矿化与闪长岩、闪长玢岩具有密切的生成关系,受北东向断裂控制。热液期成矿作用大致可划分为黄铁矿±方铅矿-石英阶段(Ⅰ),方铅矿、闪锌矿±黄铜矿-石英阶段(Ⅱ),少硫化物-碳酸盐阶段(Ⅲ)。流体包裹体研究结果表明,石英中仅发育气液两相包裹体,成矿流体为简单中低温、低盐度的NaCl-H2O热液体系,早期成矿流体应以岩浆热液为主。主成矿阶段(Ⅱ)完全均一温度峰值集中在200 ℃~250 ℃,平均值230.2 ℃,盐度峰集中在2 %~6 %,捕获时静水压力集中在14.00~25.27 MPa,估算成矿深度为1.40~2.53 km。综合分析认为,格鲁其堆山铅锌矿床与中酸性浅成侵入体具有密切时空关系,成因类型属中温热液脉型。

关键词:

铅锌矿床;地质特征;流体包裹体;成矿机制;格鲁其堆山;内蒙古

Abstract:

Geluqiduishan Pb-Zn Deposit is a newly discovered Pb-Zn deposit with great exploration potential in recent years.It is located on the west side of the Derbugan fault section,with mineralization occurring in the strata of the Ergune River Formation,Jiageda Formation,and other formations.The lead-zinc mineralization has a close genetic relationship with diorite and diorite porphyry and is controlled by NE faults.The mineralization during the hydrothermal period can be roughly pided into pyrite±galena-quartz stage (Ⅰ),galena,sphalerite±chalcopyrite-quartz stage (Ⅱ),and low sulfide-carbonate stage (Ⅲ).Fluid inclusion studies show that only gas-liquid two-phase inclusions are developed in quartz.The ore-forming fluid is a simple,medium low temperature,low salinity NaCl-H2O hydrothermal system,with early ore-forming fluids composed mainly of magmatic hydrothermal fluids.The peak full homogenization temperatures of the main mineralization stage (Ⅱ) are concentrated in the range of 200 ℃ to 250 ℃,with an average of 230.2 ℃,and salinity peaks concentrated in the range of 2 % to 6 %.The estimated formation depth is between 1.40 km and 2.53 km,with the static hydro-pressure concentrated around 14.00-25.27 MPa.Preliminary comprehensive analysis suggests that the Geluqiduishan Pb-Zn Deposit has a close spatiotemporal relationship with medium acidic shallow intrusive bodies,and the genetic type belongs to the medium temperature hydrothermal vein type.

Keywords:

Pb-Zn deposit;geological characteristics;fluid inclusions;mineralization mechanism;Geruqiduishan;Inner Mongolia