云南都龙Sn-Zn多金属矿床成矿物质来源--硫、碳、氧稳定同位素证据
Ore-Forming Materials Sources of the Dulong Sn-Zn Polymetallic Deposit, Yunnan, Evidences from S-C-O Stable Isotopes
查看参考文献39篇
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文摘
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为进一步探讨都龙锡锌多金属矿床的成矿物质来源,本文开展了硫、碳、氧同位素研究。结果表明,58件硫化物单矿物的δ~(34)S值变化小,靠近零值,具岩浆硫特性,说明该矿床的硫主要来自岩浆分异作用;23件含矿方解石样品的δ~(13)C值为-3.09‰~-8.57‰,均值-6.57‰,与岩浆碳同位素组成一致,且明显偏离大理岩分布范围。相对于早期含矿方解石,晚期不含矿方解石的δ~(13)C基本未变化,但δ~(18)O降低,显示后期有大气降水加入;大理岩的δ~(13)C值变化不大,近地表浅部的大理岩较深部、重结晶明显的大理岩的δ~(18)O更小。说明碳、氧主要来自岩浆,晚期则有大气降水的混合。 |
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其他语种文摘
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There are only a few reports regarding the source of ore-forming materials of the Dulong Sn-Zn polymetallic deposit, and their results are inconsistent. This paper systematically analyzed S-C-O isotopes of the ores to confirm ore-forming materials sources. The study suggested that S in the deposit came from magmatic differentiation, since the δ~(34)S values of 58 sulfide minerals, which are all closed to 0 with little variation, are similar to those of magma sulfurs; the δ~(13)C values of 23 calcite bearing ore minerals range from -3.09‰ to -8.57‰, with an average of -6.57‰, which are coincident with magma C isotope composition and deviate obliviously from the marble area. Compared with those of the early ore-containing-calcites, the δ~(13)C values change little in the late calcite, but the δ~(18)O values are lower, indicating precipitation was involved in the late stage; the δ~(13)C values of marbles change little, while the δ~(18)O values of deeper marble with clear recrystallization are remarkably lower. All of the above indicated that C and O mainly came from magma and mixed with precipitation in the late stage. |
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来源
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矿物岩石地球化学通报
,2014,33(6):900-907 【核心库】
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关键词
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S-C-O同位素
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成矿物质来源
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都龙锡锌多金属矿床
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云南
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地址
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1.
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, 贵阳, 550002
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云南华联矿产勘探有限责任公司, 云南, 曲靖, 655000
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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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云南华联锌铟股份有限公司科研项目
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中国科学院西部之光人才培养计划
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矿床地球化学国家重点实验室"十二五"项目群
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文献收藏号
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CSCD:5302169
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