| 桂北元宝山镁铁超镁铁岩类岩石地球化学及成因研究 |
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| 引用本文： | 韩宗珠,衣伟虹,丁蒙蒙,来志庆,周艳芝.桂北元宝山镁铁超镁铁岩类岩石地球化学及成因研究[J].中国海洋大学学报(自然科学版),2011,41(9):71-76. |
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| 作者姓名： | 韩宗珠 衣伟虹 丁蒙蒙 来志庆 周艳芝 |
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| 作者单位： | 中国海洋大学海洋地球科学学院,山东青岛,266100 |
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| 摘 要： | 桂北元宝山地区镁铁超镁铁质岩主要属于钙碱性和拉斑岩系,岩石的SiO2和MgO含量变化范围较大。在原始地慢标准化曲线上显示右倾特征,Sr,Hf元素中等亏损。元素的稀土配分曲线亦显示右倾,具有Yb正异常特征,这是弧火山岩的明显特征。从主元素及微量元素分析岩石的构造环境并不单一,其成因可能与小型洋中脊闭合有关,即板块会聚岩浆作用的产物,而非地慢柱岩浆作用的产物。
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| 关 键 词： | 岩石地球化学 镁铁-超镁铁质岩 桂北 成因 |
Lithogeochemistry and Formation of Mafic-Ultramafic Rocks from Yuanbaoshan Area of Northern Guangxi |
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| HAN Zong-Zhu,YI Wei-Hong,DING Meng-Meng,LAI Zhi-Qing,ZHOU Yan-Zhi.Lithogeochemistry and Formation of Mafic-Ultramafic Rocks from Yuanbaoshan Area of Northern Guangxi[J].Periodical of Ocean University of China,2011,41(9):71-76. |
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| Authors: | HAN Zong-Zhu YI Wei-Hong DING Meng-Meng LAI Zhi-Qing ZHOU Yan-Zhi |
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| Institution: | HAN Zong-Zhu,YI Wei-Hong,DING Meng-Meng,LAI Zhi-Qing,ZHOU Yan-Zhi(College of Marine Geoscience,Ocean University of China,Qingdao 266100,China) |
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| Abstract: | The mafic-ultramafic rocks from northern Guangxi have been dominantly classified as calc-alkaline and tholeiite series.The content of SiO2 and MgO change a wider range.The mafic-ultramafic rocks show steep right-dipping and the depletion of Sr and Hf in primitively mantle normalized patterns.The REE distribution patterns of the rocks also show steep right-dipping and positive Yb anomaly.These show features of island arc volcanic.The rock tectonic environment is analysed.The results show that it is not a sin... |
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| Keywords: | lithogeochemistry mafic-ultramafic rocks northern Guangxi petrogenesis |
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