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。
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.
出处
《金属矿山》
CAS
北大核心
2011年第10期109-112,共4页
Metal Mine
基金
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)
关键词
斑岩铜矿
雄村
元素比值
成矿温度
成矿深度
Porphyry copper
Xiongcun
Element ratios
Ore-forming temperature
Depth of mineralization
