江西银山铜多金属矿床矿石特征研究及成因意义  

CHARACTERISTICS OF ORES AND GENESIS OF YINSHAN COPPER-POLYMETALLIC DEPOSIT,JIANGXI PROVINCE

作　　者：王良果 肖渊甫[1] 白海铃 王瑜亮[1] 张杰[1] 杨开睿[1] 郑琅 

机构地区：[1]成都理工大学地球科学学院,四川成都610059

出　　处：《矿物岩石》2015年第1期39-48,共10页Mineralogy and Petrology

基　　金：中国地质调查局计划项目(1212011120846)资助

摘　　要：江西银山矿床是一个大型的铜多金属矿床。通过对野外地质调查及结合室内显微镜鉴定,利用扫描电镜和X射线能谱分析技术对矿石矿物组分及赋存状态进行了深入研究。在银山矿床新发现铋铬合金、锌铜（镍）合金、自然镍3种罕见矿物。能谱分析显示铋铬合金中铬质量百分含量普遍在8%-10%之间。锌铜（镍）合金中Cu质量分数53.93%-65.85%,Zn质量分数30.67%-41.03%,部分合金含镍。自然镍中Ni质量分数高达96.19%。此外,在银山矿床中发现了与次火山热液有关的碲银矿矿物和地下水热液有关的银金矿,能谱分析显示碲银矿中Ag质量分数约36%-42%,银金矿中Au质量分数约为67.96%-81.45%,银金矿主要以裂隙充填式赋存于碲银矿裂隙内。结合本次在银山矿床矿石样品中新发现了黄铁矿的显微霉群构造,认为银山矿床成矿后期可能有地下水热液的参与。综上,根据银山矿床中矿石矿物共生组合特征,划分出该矿床成矿过程经历了3个成矿期和3个成矿阶段,重新厘定银山矿床可能经历了岩浆期成矿作用。岩浆热液期中的中低温热液阶段是期主要成矿期,矿床成因类型为次火山热液矿床。Through field geological sampling and microscopic observation,scanning electron microscopy and X-ray energy spectrum analysis on the large scale copper-polymetallic deposit of Yinshan,three kinds of rare minerals of Bismuth-Chromium alloys,Zinc Copper-Nickel alloys and Nickel are found.The quality percentage content of Chromium in Bismuth-Chromium accounts for8%-10%,the content of Cu in Zinc Copper-Nickel alloys makes up of 53.93%-65.85%and Zn accounts for The electrum occurs in crack of the Hessite.The appearance of microscopic organism of pyrite indicates that the Yinshan deposits probably links to underground thermal water.3metallogenic epoch and 3mineralization stages are classified based on the characteristics of ore mineral paragenetic association.Accordingly,the magmatic mineralization of copper-polymetallic deposit of Yinshan is determined as mid-low hydrothermal stage is the major metallogenic epoch and subvolcano hydrothermal ore deposit as its main genetic type.

关 键 词：锌铜(镍)合金 显微霉群构造 岩浆期成矿作用 次火山热液矿床 银山 江西 

分 类 号：P618.4[天文地球—矿床学]