投稿时间：2014-06-10
修订日期：2014-07-09
网络发布日期：2014-09-15
中文摘要:系统分析了金川Ⅱ号岩体中2号矿体西端、中部和东端的硫化物矿石中的铂族元素（PGE）和亲铜元素地球化学特征，以期探讨这些元素的空间变化规律及其成因，以及对金川矿床成矿过程的指示意义。研究结果表明：100%硫化物中，PGE（Ir、Ru、Rh、Pt、Pd）总体从西端到东端逐渐降低，且浸染状矿石和海绵陨铁状矿石的100%硫化物中PGE和亲铜元素含量的变化特征相似。表明金川2号矿体硫化物矿石的PGE和亲铜元素的含量主要受硫化物熔离作用的约束，硫化物熔体分离结晶和后期热液蚀变影响不明显。2号矿体浸染状矿石的100%硫化物中，PGE和亲铜元素含量总体低于1号矿体浸染状矿石的含量，但是前者西端的样品与后者东端的样品，上述元素特征相似，暗示二者是同一岩浆通道系统中硫化物熔离的产物，并且硫化物熔离形成2号矿体时具有比1号矿体低的R值，这也暗示了含矿岩浆是自1号矿体向2号矿体流动的。
Abstract:Geochemical characteristics of the platinum-group and chalcophile elements of sulfide ores sampled from the western, middle and eastern part of the No. 2 ore body in the Ⅱ segments of Jinchuan intrusion were systematically analyzed with the purpose of investigating their spatial variation regularity and genesis as well as their indicative significance for the ore-forming process of the Jinchuan deposit. The results imply that the values of PGE(Ir, Ru, Rh, Pt, Pd)on a 100% sulfide basis decrease gradually from the west to the east in general, and there is a similar variation of the concentrations of PGE and chalcophile elements on a 100% sulfide basis in both disseminated and net-textured sulfide ores. The characteristics indicate that the concentrations of PGE and chalcophile elements were restrained by the segregation of sulfides but little affected by fractional crystallization of sulfide melts and late-stage alteration. The concentrations of PGE and chalcophile elements of disseminated ores on a 100% sulfide basis in No. 2 orebody are lower than those in No. 1 orebody, but the values of these elements in the western part of No. 2 orebody are similar to those in the eastern part of the No. 1 orebody, which implies that both of the orebodies resulted from the segregation of sulfides in the same magma conduit, and during the rock-forming process the ore-bearing magma flowed from No. 1 to No. 2 orebody because of the lower R value of No. 2 than that of No. 1 in the process of segregation of sulfide melts.
文章编号：
中图分类号：P618.41;P618.63
文献标志码：
基金项目:本文受到中国科学院地球化学研究所矿床地球化学国家重点实验室项目（编号：SKLODG- ZY125-06）、中国科学院国家外国专家局创新团队国际合作伙伴计划“陆内成矿作用研究团队”（KZZD-EW-TZ-20）与国家自然科学基金（编号：40973038、41003022和41172090）资助
引用文本：
王亮,陈列锰,宋谢炎,江金进,符志强,王玉山,潘小平.2014.金川铜镍硫化物矿床2号矿体铂族及亲铜元素地球化学特征[J].矿床地质,33(4):727~741WANG Liang,CHEN LieMeng,SONG XieYan,JIANG JinJin,FU ZhiQiang,WANG YuShan,PAN XiaoPing.2014.Geochemical characteristics of platinum-group and chalcophile elements in No.2 orebody of Jinchuan Cu-Ni sulfide deposit[J].Mineral Deposits33(4):727~741
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