文档介绍：世界地质
第 31 卷第 3 期 Vol. 31 No. 3
2012 年 9 月 GLOBAL GEOLOGY Sept. 2012
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文章编号 1004—5589 2012 03—0493—12
金川镍铜铂硫化物矿床矿石成因
———来自铂族元素地球化学的证据
徐刚1 ,汤中立1 ,钱壮志1 ,焦建刚1 ,魏翔1 ,王硕2
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1. 长安大学地球科学与资源学院西安 710054 2. 吉林大学地球科学学院长春 130061
摘要: 对金川镍铜铂硫化物矿床Ⅰ、Ⅱ矿区主矿体典型钻孔中的不同类型矿石进行了系统观察和铂族
元素分布特征研究。金川矿床中星点状矿石、网状矿石、块状矿石 PGE 总量依次降低,由西至东 24
号、1 号、2 号矿体的 PGE 总量亦具渐次降低趋势。形成块状矿石的硫化物熔体 PGE 分异作用较星点
状和网状矿石更充分; 块状矿石铂族元素分布特征显示其受晚期硫化物熔体分离结晶和单硫化物固溶
体( MSS) 分离作用控制。研究结果表明: 星点状矿石是岩浆分离结晶过程中较快速度冷凝和就地硫
化物熔离的结果; 而网状矿石可能是硫化物熔体经深部熔离但未经充分的硫化物分离结晶作用贯入的
产物; 块状矿石成因定量模拟结果排除了 R 因子控制作用,不同矿体中块状矿石由不同程度的单硫
化物固溶体( MSS) 分离结晶所形成。
关键词: 镍铜铂硫化物矿床; 矿石成因; 铂族元素; 金川
中图分类号: P611. 1 + 1 文献标识码: A doi: 10. 3969 /j. issn. 1004-5589. 2012. 03. 006
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Ores genesis in Jinchuan Ni--Cu-- PGE sulfide deposit
evidence from geochemistry of platinum group elements
1 , 1 , 1 , 1 , 1 , 2
XU Gang TANG Zhong-li QIAN Zhuang-zhi JIAO Jian-gang WEI Xiang WANG Shuo
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1. College of Earth Sciences and Resources Chang'an University Xi'an 710054 China
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2. College of Earth Sciences Jilin University Changchun 130061 China
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Abstract The authors studied the different types of ores in I and II mining areas of Jinchuan Ni--Cu-- PGE
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sulfide deposit and particularly the distribution pattern of platinum group elements. The ∑PGE in disseminated
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-textured ores and massive ores reduced gradually with the same trend in the mining area of orebodies Nos.
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24 1 and 2 from the west to the east. The sulfide melt of massive ores had fuller PGE differentiation than dissemi-
nated ores -textured ores. The distribution of platinum group elements in massive ores showed that they were
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controlled by sulfide melt fractional crystallization and the separation of monosulfide solid solution MSS . The
study showed that the disseminated ores were the results of rapid condensation and the in situ sulfide melting from
the magma fractional crystallization. -textured ores formed by the