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现代地质 ›› 2011, Vol. 25 ›› Issue (5): 832-845.

• 矿床学与岩石学 • 上一篇    下一篇

湖南龙山金锑矿黄铁矿微量元素特征及其对成矿过程的指示

 庞保成1,2,杨东生3 ,周志4,刘义茂3,刘鹏程4,刘远栋2   

  1. 1桂林理工大学 广西地质工程中心重点实验室,广西 桂林541004;2桂林理工大学 地球科学学院,广西 桂林541004;
    3中国科学院 广州地球化学研究所,广东 广州510640;4湖南新龙矿业有限责任公司,湖南 新邵422927
  • 收稿日期:2011-04-22 修回日期:2011-08-13 出版日期:2011-10-26 发布日期:2011-11-03
  • 作者简介:庞保成,男,教授,1968年出生,矿产普查与勘探专业,主要从事矿产勘查与评价、矿床学研究。 Email:pangbaocheng@glite.edu.cn。
  • 基金资助:

    国家自然科学基金项目(40772056);广西地质工程中心重点实验室项目(11-031-20-3)。

Trace Elements in Pyrites and Their Implication for Hydrothermal Ore forming Process in Longshan Gold antimony Deposits, Hunan, China

 LONG  Bao-Cheng-1, 2 , YANG  Dong-Sheng-3 , ZHOU  Zhi-4, LIU  Xi-Mao-3, LIU  Feng-Cheng-4, LIU  Yuan-Dong-2   

  1. 1Key Laboratory of Geological Engineering Center of Guangxi, Guilin University of Technology, Guilin, Guangxi541004, China;
     2 College of Earth Sciences, Guilin University of Technology, Guilin, Guangxi541004, China; 3 Guangzhou Institute of Geochemistry,
    Chinese Academy of Sciences, Guangzhou, Guangdong510640, China; 4 Xinlong Mining Company, Xinshao, Hunan422927, China
  • Received:2011-04-22 Revised:2011-08-13 Online:2011-10-26 Published:2011-11-03

摘要:

黄铁矿中的微量元素含量既可提供元素赋存状态的信息,又可示踪热液成矿过程。利用电子探针对龙山金锑矿赋矿地层新鲜板岩、蚀变围岩以及矿石中黄铁矿的多种微量元素进行了分析,研究结果表明:沉积黄铁矿中Au主要以纳米颗粒形式存在;热液黄铁矿中既有固溶体金,也有纳米金。沉积黄铁矿中Co、Ni、Sb、Mn、Te可能以固溶体形式存在,As、Pb、Zn、Cu、Ag以包裹体形式存在;热液黄铁矿中As、Sb、Mn、Te可能以固溶体的形式存在,Co、Ni、Pb、Zn、Cu、Ag以矿物包裹体形式存在。龙山金锑矿至少经历了两个成矿期:早期是由深部的富Ni岩浆流体引发的金、铅、铜、钨矿化,该期矿化强度不大;晚期是以大气降水循环引起的金、锑矿化,是龙山金锑矿的主要成矿期,并大致可分为显微金阶段、次显微金辉锑矿阶段、可见金辉锑矿阶段和辉锑矿阶段4个成矿阶段。

关键词: 黄铁矿, 微量元素, 赋存状态, 成矿过程, 龙山金锑矿, 湖南

Abstract:

Trace elements content in pyrite can give information of element occurrence and trace hydrothermal oreforming processes. Many kinds of trace elements in pyrites from slate, altered slate and ore in Longshan goldantimony deposits were measured using EPMA. The analysis data suggest that Au in sedimentary pyrites are mainly nano particles, whereas Au in hydrothermal pyrites are solid solution as well as nano. In sedimentary pyrites, Ni, Sb, Mn, Te might be in form of solid solution, but As, Pb, Zn, Cu, Ag mineral inclusions. In hydrothermal pyrites, As, Sb, Mn, Te might be in form of solid solution, but Co, Ni, Pb, Zn, Cu, Ag mineral inclusions. Longshan goldantimony deposits had been underwent two mineralization epochs. During earlier epoch, it occured lower intensity AuPbCuW mineralization related to deep high Ni magmatic fluids. During later epoch, it occured AuSb mineralization closely related to meteoric circulation. The later mineralization epoch, as the main mineralization period, can be divided into four stages: micro gold stage, submicro goldstibnite stage, invisible goldstibnite stage, and stibnite stage.

Key words: pyrite, trace element, occurrence, oreforming process, Longshan goldantimony deposit, Hunan