金川Cu-Ni(PGE)硫化物矿床中西岩体和东岩体的成因联系  

The Cause Connections for Western Rock Body and East Rock Body of the Jinchuan Cu-Ni Sulfide Deposit,NW China

作　　者：彭璐 赖健清[1,2] 王玉华 PENG Lu;LAI Jian-qing;WANG Yu-hua(MOE Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environment Monitoring,Changsha,410083,P.R.China;School of Geosciences and Info-physics,Central South University,Changsha,410083,P.R.China)

机构地区：[1]中南大学地球科学与信息物理学院,湖南长沙410083 [2]中南大学有色金属成矿预测与地质环境监测教育部重点实验室,湖南长沙410083

出　　处：《南方金属》2023年第5期14-18,共5页Southern Metals

摘　　要：金川Cu-Ni(PGE)硫化物矿床以F_(16-1)断层为界,主要划分为西岩体(III、I矿区)和东岩体(II-W,II-E和IV矿区),由于西岩体III矿区研究较少,使得这两个岩体在成因上存在争议。文章根据最新采集的III矿区钻孔样品并结合前人其他矿区的钻孔数据,对东西岩体的岩相学和全岩地球化学特征进行研究。东西岩体在岩石类型上十分类似,但岩相分布特征具有明显差别。主、微量元素特征指示东西岩体经历了不同的岩浆演化过程及不同程度的地壳混染。铂族元素含量和比值均高于原始地幔,暗示东西岩体在深部经历了不同程度的硫化物熔离,而块状矿石则指示经历硫化物结晶分异。Jinchuan Cu-Ni(PGE)sulfide deposit is mainly divided into the west portion(III,I mining areas)and the east portion(II-W,II-E and IV mining areas).There are fewer studies in the III mining area,which makes these two portions controversial in the cause.Based on the latest collected III mining area drilling samples and combined with drilling data of other predecessors,the rock phase science and full rock gexic characteristics of the east-west portions are studied.The east and west portions are very similar in rock type,but the characteristics of rock phase distribution are significantly different.The characteristics of the main and trace elements indicate that the east and west portions have gone through different magma evolutionary processes and different degrees of crustal dyeing.The content and ratio of the platinum elements are higher than the original mantle,suggesting that the east and west portions have gained from different degrees of sulfide in the deep,while the block of the ore indicates that the sulfide crystals are different.

关 键 词：金川矿床 岩石学特征 岩性序列 全岩地球化学 

分 类 号：P595[天文地球—地球化学]