中条山铜矿峪变石英二长斑岩的锆石U-Pb年龄和Hf同位素特征及其地质意义

李宁波, 罗勇, 郭双龙, 姜玉航, 曾令君, 牛贺才. 2013. 中条山铜矿峪变石英二长斑岩的锆石U-Pb年龄和Hf同位素特征及其地质意义. 岩石学报, 29(7): 2416-2424.
引用本文: 李宁波, 罗勇, 郭双龙, 姜玉航, 曾令君, 牛贺才. 2013. 中条山铜矿峪变石英二长斑岩的锆石U-Pb年龄和Hf同位素特征及其地质意义. 岩石学报, 29(7): 2416-2424.
LI NingBo, LUO Yong, GUO ShuangLong, JIANG YuHang, ZENG LingJun, NIU HeCai. 2013. Zircon U-Pb geochronology and Hf isotope geochemistry of metamorphic quartz-monzonite porphyry from Tongkuangyu area, Zhongtiao Mountain and its geological implications. Acta Petrologica Sinica, 29(7): 2416-2424.
Citation: LI NingBo, LUO Yong, GUO ShuangLong, JIANG YuHang, ZENG LingJun, NIU HeCai. 2013. Zircon U-Pb geochronology and Hf isotope geochemistry of metamorphic quartz-monzonite porphyry from Tongkuangyu area, Zhongtiao Mountain and its geological implications. Acta Petrologica Sinica, 29(7): 2416-2424.

中条山铜矿峪变石英二长斑岩的锆石U-Pb年龄和Hf同位素特征及其地质意义

  • 基金项目:

    本文受国家重点基础研究发展计划"973"项目(2012CB416603) 资助.

详细信息
    作者简介:

    李宁波 ,男,1985 年生,博士生,地球化学专业,E-mail: liningbo@gig.ac.cn

    通讯作者: 牛贺才,男,1963年生,博士,研究员,地球化学专业,E-mail: niuhc@gig.ac.cn
  • 中图分类号: P588.132; P597.3

Zircon U-Pb geochronology and Hf isotope geochemistry of metamorphic quartz-monzonite porphyry from Tongkuangyu area, Zhongtiao Mountain and its geological implications

More Information
  • 中条山铜矿峪斑岩型矿床的成矿斑岩形成时代一直存在争议。本文通过对铜矿峪矿床中变石英二长斑岩的U-Pb年代学研究发现:铜矿峪变石英二长斑岩的36颗锆石的上交点年龄为2121±10Ma,207Pb/206Pb年龄从2065Ma到2196Ma,加权平均年龄为2117±13Ma,这与铜矿峪矿床的Re-Os同位素年龄(2108Ma)在误差范围内一致,暗示了成岩成矿的一致性。锆石的Hf同位素特征显示,样品的εHf(t)值介于-7.79~0.39,显示出斑岩的形成与古老地壳的部分熔融有关。同时,铜矿峪变石英二长斑岩的形成时代与华北地区的一些A型花岗岩,双峰式火山岩等与伸展有关的火成岩的形成时代大体一致,同时也与中条裂谷的活动一致,说明铜矿峪变石英二长斑岩形成于一个伸展的动力学背景下。因此,本文认为铜矿峪矿床是与大陆伸展环境的斑岩型矿床。

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  • 图 1 

    铜矿峪地区地质简图(a)、铜矿峪矿区地质简图(b)和铜矿峪铜矿剖面图(c)(据孙大中和胡维兴, 1993)

    Figure 1. 

    Geological map of the Zhongtiao area(a), briefly geological map of Tongkuangyu mining area(b)and geological section map of Tongkuangyu mineral deposit(c)(after Sun and Hu, 1993)

    图 2 

    铜矿峪变石英二长斑岩显微照片

    Figure 2. 

    Microphotographs of the metamorphic quartz-monzonite porphyry from Tongkuangyu area

    图 3 

    铜矿峪变石英二长斑岩的锆石年龄谐和图(a)和加权平均图(b)

    Figure 3. 

    U-Pb concordia diagrams(a)and weighted average diagrams(b)for the samples of the BF6

    图 4 

    变石英二长斑岩锆石的稀土配分曲线(球粒陨石值据Sun and McDonough, 1989)

    Figure 4. 

    Zircon chondrite-normalized REE diagram(chondritic values are after Sun and McDonough, 1989)

    图 5 

    变石英二长斑岩的锆石Hf同位素特征

    Figure 5. 

    Hf isotopic characteristics of the zircons from Tongkuangyu metamorphic quartz-monzonite porphyry

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出版历程
收稿日期:  2013-02-01
修回日期:  2013-05-04
刊出日期:  2013-07-01

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