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金属矿山 ›› 2011, Vol. 40 ›› Issue (10): 109-112.

• 地质与测量 • 上一篇    下一篇

雄村斑岩型铜(金)矿床成矿元素原子比值分析

周宇雄,汪雄武,雷传扬,张俊成   

  1. 成都理工大学地球科学学院
  • 出版日期:2011-10-11 发布日期:2011-10-12
  • 基金资助:

    * 中央级公益性行业科研专项(编号:200911007-02),国土资源地质大调查项目(编号:1212010733803),国土资源部全国矿产资源潜力评价项目(编号:1212010813025),教育部岩石学矿床学国家重点(培育)学科建设项目(编号:SZD0407)。

Analysis on the Atomic Ratios of Ore-forming Elements in Xiongcun Porphyry Cu-Au Deposit

Zhou Yuxiong,Wang Xiongwu,Lei Chuanyang,Zhang Juncheng   

  1. College of Earth Sciences,Chengdu University of Technology
  • Online:2011-10-11 Published:2011-10-12

摘要: 通过对西藏雄村斑岩铜(金)矿床成矿元素含量的分析,结果表明Au的含量相对较高,铜矿石中Cu、Au原子比值低于25 000,Au、Mo原子比值高于30,表明其为富金斑岩铜矿床。雄村斑岩铜(金)矿床Cu与Au、Ag的关系比较密切,Au与Mo之间则基本没有关系。矿体主要分布在强烈的绢云母和硅化蚀变带中,Au、Ag 主要赋存于黄铜矿中。雄村斑岩型铜(金)矿床成矿深度较浅,而富金斑岩矿床的一般成矿深度为0.4~1.5 km,雄村铜(金)矿床中Mo主要赋存于辉钼矿中,Mo元素多集中在矿体的边缘,含量较低,仅为驱龙斑岩铜矿的1/10。雄村斑岩型铜(金)矿床的形成环境为岛弧或似岛弧环境。  

关键词: 斑岩铜矿, 雄村, 元素比值, 成矿温度, 成矿深度

Abstract: The analysis on the ore-forming contents of Xiongcun porphyry copper deposits in Tibet showed that Gold content are relatively high.The copper ores exhibit Cu/Au atomic ratios much smaller than 25 000,Au/Mo atomic ratios greater than 30,which signify them as gold-rich porphyry copper deposits.There is a close correlation between Au,Cu and Ag in Xiongcun porphyry Cu-Au deposits,but poor correlation between Au and Mo.The ore-body is widespread in the phyllic and siliconization alterations zone,and Au and Ag mainly occur in chalcopyrite.Xiongcun porphyry mineralization is generally low in depth,and gold-rich porphyry copper deposits tend to be emplaced at levels of 0.4~1.5 km.Mo in Xiongcun copper(gold) deposit mainly occur in molybdenite and more concentrated in the edge of the ore body with a lower content of only one-tenth of Qulong porphyry copper deposit.Xiongcun porphyry deposits are formed in an environment of island arc or similar island arc.

Key words: Porphyry copper, Xiongcun, Element ratios, Ore-forming temperature, Depth of mineralization