金宝山岩体铂族元素特征及成因意义
PGE in Jinbaoshan Intrusion: Possible Evidence of Mantle Plume Origin
查看参考文献20篇
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文摘
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金宝山岩体是西南暗色岩系中的一个典型铂族元素矿化岩体,本文通过对岩体铂族元素地球化学特征的分析,探讨了岩体的成因属性.研究表明,金宝山岩体铂族元素特征与西南暗色岩区大部分铜镍硫化物型铂族元素含矿岩体基本相同,类似于典型地幔柱源的冰岛玄武岩及俄罗斯诺里尔斯克岩体,是地幔柱活动类OIB源部分熔融作用产物,成因上与峨眉山地幔柱活动相联系. |
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其他语种文摘
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The Jinbaoshan intrusion, situated in Midu county, Yunnan, is a classic mafic-ultraniafic intrusion with PGE mineralization in Southwestern Trap. This paper discussed the characteristics of PGE geochemistry of the intrusion. For the strong fractionated distribution patterns of PGE, it s clear that the intrusion originated from basic magma rather than ultra-mafic, and it's from OIB-like mantle source for its lower ratio in Pd relative to Ir. In general, the distribution patterns of PGE in Jinbaoshan intrusion are the same as the other intrusions in Southwestern Trap, and similar with that of Iceland basalts and Noril sk intrsion, which are believed to be the mantle plume products. Thus, Jinbaoshan intrusion can be linked genetically with Emeishan mantle plume. |
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来源
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矿物岩石地球化学通报
,2004,23(1):28-31 【扩展库】
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关键词
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铂族元素
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基性-超基性岩
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峨眉山地幔柱
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云南
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地址
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1.
中科院地球化学所, 矿床地球化学重点实验室, 贵阳, 550002
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云南云宝铂钯矿业有限公司, 云南, 大理, 671000
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1007-2802 |
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学科
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地质学 |
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基金
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中国科学院知识创新工程项目
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文献收藏号
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CSCD:1512197
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