地学前缘 ›› 2019, Vol. 26 ›› Issue (3): 202-210.DOI: 10.13745/j.esf.sf.2019.3.5

• 非主题来稿选登 • 上一篇    下一篇

不同类型热液金矿床主成矿期黄铁矿成分标型特征

李洪梁，李光明   

  1. 1. 成都理工大学 地球科学学院, 四川 成都 610059
    2. 中国地质调查局 成都地质调查中心, 四川 成都 610081
  • 收稿日期:2019-02-14 修回日期:2019-04-15 出版日期:2019-05-25 发布日期:2019-05-25
  • 通讯作者: 李光明(1965—)，男，博士，研究员，从事青藏高原区域成矿学研究。
  • 作者简介:李洪梁(1990—)，男，博士研究生，矿物学、岩石学、矿床学专业。
  • 基金资助:
    国家重点研发计划项目(2016YFC0600308，2018YFC0604103)；中国地质调查局基础性公益性地质矿产调查项目(DD20160015)

Compositional characteristics of pyrite ore formed in the main metallogenic period of various types of hydrothermal gold deposits

LI Hongliang,LI Guangming   

  1. 1. College of Earth Sciences, Chengdu University of Technology, Chengdu 610059, China
    2. Chengdu Center, China Geological Survey, Chengdu 610081, China
  • Received:2019-02-14 Revised:2019-04-15 Online:2019-05-25 Published:2019-05-25
  • Supported by:
     

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摘要： 黄铁矿作为成矿热液活动的产物，是热液金矿床中最为重要的载金矿物，其成分标型特征记录了大量矿床成因信息。在分类总结了各类型热液金矿床关键地质特征的基础上，采用比较矿床学的研究思路，较为系统地分析了不同类型热液金矿床中主成矿期或与金矿化同期的黄铁矿的主微量元素及组合特征、(Fe+S)As特征、δFeδS特征、AsCoNi特征以及热电性特征。结果表明，不同类型热液金矿床中的黄铁矿成分特征具有显著差异，彼此显示出特征性的成因标型特征，可作为判别热液金矿床成因的依据。结合各类热液金矿床形成的构造背景，提出热液金矿床是研究大陆动力学的理想对象。通过这些研究，初步建立了不同类型热液金矿床地质与黄铁矿成分标型特征之间的耦合关系，为今后热液金矿床成因的判别和黄铁矿标型特征的进一步研究提供一定的参考。

 

关键词: 黄铁矿, 成分, 标型, 矿床地质, 热液金矿床, 矿床成因

Abstract: Pyrite ore, a product of metallogenic hydrothermal activity, is one of the most important gold-bearing ores in hydrothermal gold deposits, with a wealth of genetic information recorded in its chemical composition. Based on the classification and summary of key geological features of different types of hydrothermal gold deposits, and adopting the research methodology of comparative metallogeny, we systematically analyzed the compositional characteristics of major and trace elements and their combinations and that of (Fe+S)-As, δFeδS, As-Co-Ni, as well as thermoelectricity of pyrite ore formed during the main metallogenic period of various gold deposits or by co-deposition with gold. The results show that the chemical compositions of pyrite ores from different type of hydrothermal gold deposit are significantly different, and the compositional characteristics can be used to identify the genesis of hydrothermal gold deposits. We also proposed that hydrothermal gold deposits are ideal objects for studying continental dynamics when tectonic settings are also taken into consideration. Through these studies, we established preliminarily a coupling relationship between geological features and compositional characteristics of pyrite ore. This relationship will help future identification of the the genesis of hydrothermal gold deposits and further typomorphic characterization of pyrite ores.

Key words: pyrite, composition, typomorphic, ore deposit geology, hydrothermal gold deposit, genesis

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