| 承德大北沟组玄武的岩石学特征及年代学特征(增刊) |
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| 引用本文： | 南燕云,王瑜,周丽云,吴成.承德大北沟组玄武的岩石学特征及年代学特征(增刊)[J].中国矿业,2017,26(S2). |
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| 作者姓名： | 南燕云 王瑜 周丽云 吴成 |
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| 作者单位： | 中国地质大学北京科学研究院,中国地质大学北京科学研究院,中国地质大学北京科学研究院,中国地质大学北京科学研究院 |
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| 摘 要： | 承德大北沟组火山岩的下部由柱状节理玄武岩组成,其岩性为橄榄玄武岩,对其进行LA-ICP-MS 锆石U-Pb 年代学测试。结果表明,玄武岩中的锆石均为典型的岩浆告示,206Pb/238Pb加权平均年龄117 Ma-144 Ma,属早白垩世岩浆活动的产物。球粒陨石标准化配分模式图上表现为轻稀土亏损、重稀土富集的左倾配分模式,表现出明显的铈正异常和铕负异常特征.
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| 关 键 词： | 大北沟组玄武岩 岩石学特征 年代学特征 |
| 收稿时间： | 2017/9/25 0:00:00 |
| 修稿时间： | 2017/9/25 0:00:00 |
Discussion on the metallogenic model of Baogasidaban copper deposit in Nileke County, Xinjiang |
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| Affiliation: | Institute of Earth Sciences,China University of GeosciencesBeijing,Institute of Earth Sciences,China University of GeosciencesBeijing,Institute of Earth Sciences,China University of GeosciencesBeijing,Institute of Earth Sciences,China University of GeosciencesBeijing |
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| Abstract: | The Dabeigou Goup consist of olivine basalt in the lower part. The analysis of LA-ICP-MS zircon U-Pb dating and trace element show that the zircons of the mafic dykes are typical magmatic zircons, and the weighted average age of 206Pb / 238Pb is 117 Ma-144Ma, which is the product of the Early Cretaceous magmatism. Chondrite-normalized REE patterns reveals LREEs losses, HREEs enrichment, and left-wing type with positive Ce anomalies and negative europium anomalies. |
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| Keywords: | Dabeigou Group basalt petrological characteristics geological characteristics |
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