| 藏北冈塘错地区OIB型和E-MORB型玄武岩组合及大地构造意义 |
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| 引用本文： | 鲁庆伟,王根厚.藏北冈塘错地区OIB型和E-MORB型玄武岩组合及大地构造意义[J].新疆地质,2011,29(3):332-336. |
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| 作者姓名： | 鲁庆伟 王根厚 |
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| 作者单位： | 1. 中国地质大学,北京 100083;天津华北地质勘查局地质研究所,天津300170
2. 中国地质大学,北京,100083 |
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| 基金项目： | 中国地质调查局西藏1:5万双湖角木日地区4幅区域地质调查项目(1212010818014)项目资助 |
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| 摘 要： | 通过对西藏羌塘中部冈塘错地区玄武岩地球化学特征研究,发现该区有OIB型和E-MORB型两类玄武岩.对两类玄武岩进行主量元素、稀土元素和微量元素地球化学图解分析及大地构造意义探讨,结合区域地质背景,认为冈塘错地区玄武岩形成于洋岛环境,可能受地幔柱岩浆活动影响,E-MORB型玄武岩的出现说明该区可能存在洋底高原.
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| 关 键 词： | 西藏 羌塘 玄武岩 地球化学 构造环境 |
OIB-TYPE BASALT AND E-MORB-TYPE BASALT EXIST IN THE GANGTANGCUO AREA, CENTRAL QIANGTANG, TIBET, CHINA, AND ITS TECTONIC SIGNIFICANCE |
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| LU Qing-wei,WANG Gen-hou.OIB-TYPE BASALT AND E-MORB-TYPE BASALT EXIST IN THE GANGTANGCUO AREA, CENTRAL QIANGTANG, TIBET, CHINA, AND ITS TECTONIC SIGNIFICANCE[J].Xinjiang Geology,2011,29(3):332-336. |
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| Authors: | LU Qing-wei WANG Gen-hou |
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| Institution: | LU Qing-wei1,2,WANG Gen-hou1(1.China University of Geoscinces,Beijing,100083,China,2.Tianjin North China Geological Exploration Bureau,Tianjin,300170,China) |
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| Abstract: | By means of studying the geochemistry of basalt in the Gangtangcuo area,central Qiangtang,Tibetan.Found that there are two types of basalt: OIB-type basalt and E-MORB-type basalt.And based on geochemical diagram analysis to study major elements,rare earth elements,trace element and tectonic significance of the two types basalt,combined with regional geological background,I think Permian basalt in the area formed in an oceanic island environment,and may be subject to mantle plume magmatism response.E-MORB-ty... |
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| Keywords: | Tibet Qingtang Basalt Geochemistry Tectonic setting |
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