| 迁安紫苏花岗岩的稀土元素地球化学 |
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| 引用本文： | 王凯怡,白益良,杨瑞英,黄忠祥.迁安紫苏花岗岩的稀土元素地球化学[J].地质科学,1984,0(3):330-340. |
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| 作者姓名： | 王凯怡 白益良 杨瑞英 黄忠祥 |
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| 作者单位： | 1. 中国科学院地质研究所;2. 武汉地质学院;3. 中国科学院高能物理研究所 |
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| 摘 要： | 迁安断块隆起或称迁安花岗岩片麻岩穹隆是冀东高级变质地体的一个重要组成部分,它的四周为大型古断裂所切割,仅在西侧保留了边缘褶皱束,在褶皱束内有同构造的或构造后的纵向断裂(钱祥麟,1981)。本文讨论的紫苏花岗岩,大致沿西部边缘褶皱束的纵向断裂分布。
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| 关 键 词： | , |
| 收稿时间： | 1983-01-31 |
| 修稿时间： | 1983-01-31; |
RARE EARTH ELEMENT GEOCHEMISTRY OF QIANAN CHARNOCKITE |
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| Wang Kaiyi,Bai Yiliang,Yang Kuiying,Huang Zhongxiang.RARE EARTH ELEMENT GEOCHEMISTRY OF QIANAN CHARNOCKITE[J].Chinese Journal of Geology,1984,0(3):330-340. |
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| Authors: | Wang Kaiyi Bai Yiliang Yang Kuiying Huang Zhongxiang |
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| Institution: | 1. Institute of Geology, Academia Sinica, Beijing;2. Wuhan Institute of Geology, Wuhan;3. Institute of High Energy Physics, Academia Sinka, Beijing |
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| Abstract: | The charnockites from Qianan block-uplift, estern Hebei Province, China have been investigated for their isotopic and trace element geochemistry.Most charnockites are granodioritic and adamellitic in composition, only a few samples have composition corresponding to leuconoritic. The charnoekites belong to post-kinematic intrusions. Whole rock Rb/Sr isochron of the charnockites give an age of 2647±53(2σ) Ma. Highly fractionated REE patterns and variable (Ce/Yb)N ratios in the rocks are interpreted to be a result of igneous processes. The relation between total REE content, (Ce/Yb)N ratios and magnitude of the Eu anomalies clearly implies that the charnockites are related to the fractional crystallization under high temperature and low PH2O condition, the major cumulate phases are orthopyroxene and pla-gioclase.The charnockites were generated at longitudinal fault. The magma could be related to in-situ dry anatexis. |
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| Keywords: | , |
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