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新疆东天山二红洼岩体岩浆演化特征与成矿潜力分析

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段星星, 杜辉, 刘拓, 李文明, 夏明哲. 新疆东天山二红洼岩体岩浆演化特征与成矿潜力分析[J]. 西北地质, 2016, 49(3): 50-60.
引用本文: 段星星, 杜辉, 刘拓, 李文明, 夏明哲. 新疆东天山二红洼岩体岩浆演化特征与成矿潜力分析[J]. 西北地质, 2016, 49(3): 50-60.
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DUAN Xingxing, DU Hui, LIU Tuo, LI Wenming, XIA Mingzhe. Magmatic Evolution and Mineralization Potential of the Erhongwa Intrusion in East Tianshan Mountains, Xinjiang[J]. Northwestern Geology, 2016, 49(3): 50-60.
Citation: DUAN Xingxing, DU Hui, LIU Tuo, LI Wenming, XIA Mingzhe. Magmatic Evolution and Mineralization Potential of the Erhongwa Intrusion in East Tianshan Mountains, Xinjiang[J]. Northwestern Geology, 2016, 49(3): 50-60.
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新疆东天山二红洼岩体岩浆演化特征与成矿潜力分析

  • 1.

    中国地质地质调查局西安地质调查中心, 陕西 西安 710054

  • 2.

    长安大学地球科学与资源学院, 陕西 西安 710054;西部矿产资源与地质工程教育部重点实验室, 陕西 西安 710054

  • 基金项目: 国家自然基金项目（41102045）和中央高校基本科研业务费专项资金（2013G1271100）资助

Magmatic Evolution and Mineralization Potential of the Erhongwa Intrusion in East Tianshan Mountains, Xinjiang

  • 1.

    Xi'an Center of Geological Survey, China Geological Survey, Xi'an 710054, Shaanxi, China

  • 2.

    College of Earth Science and Resources, Chang'an University, Xi'an 710054, Shaanxi, China;Key Laboratory of Western China's Mineral Resources and Geological Engineering, Ministry of Education, Xi'an 710054, Shaanxi, China

    摘要
  • 二红洼岩体位于康古尔-黄山韧性剪切带东段，主要由含长二辉橄榄岩、橄榄辉长岩、辉长苏长岩和淡色辉长岩组成。岩石相对富集LREE，亏损高场强元素（Nb、Ta、Ti）。岩体原生岩浆为普通拉斑玄武岩（MgO=7.3%）。通过对元素地球化学和Nd、Sr、Pb同位素体系研究证明，岩浆源区以软流圈物质为主，混入了少量富集岩石圈地幔组分，岩浆遭受了约5%上地壳物质的混染。与同岩带典型含矿岩体对比研究表明，岩体在岩石组合、原生岩浆性质、同化混染程度等方面存在显著差异，这些因素可能制约了成矿潜力。
    Erhongwa intrusion lies in the eastern part of Kongguer-Huangshan fault belt. It consists of pl-bearing iherzolite, olivine gabbro,gabbronorite and leucogabbro. Most of these rocks are slightly enriched in LREE and depleted in HFSE(Nb, Ta and Ti).The primary magma of this intrusion may be ordinary tholeiite (MgO=7.3%). Element geochemistry and Nb, Sr, Pb isotope characters suggest that this magma source is composed of asthenosphere components, mixed with a small amount of lithospheric mantle components, and this magma was subjected to becontaminated about 5% by contiental crust. Compared with others intrusion in this mafic-ultrumafic belt, the Erhongwa intrusion has some significant differences in rock association, primary magma nature and assimilation,which may restrict the mineralization potential in this area.
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收稿日期:  2015-12-02
修回日期:  2016-05-16
刊出日期:  2016-09-15

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