| 内蒙古赤峰北部下二叠统于家北沟组碎屑沉积岩地球化学特征 |
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| 引用本文： | 郭伟,杨欣德,张娟,郝彬.内蒙古赤峰北部下二叠统于家北沟组碎屑沉积岩地球化学特征[J].地质力学学报,2011,17(3):295-302. |
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| 作者姓名： | 郭伟 杨欣德 张娟 郝彬 |
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| 作者单位： | 1.中国地质大学地球科学与资源学院，北京 100083 |
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| 基金项目： | 中国地质调查局“内蒙古1∶50000炒米房幅(K50E006017),土城子幅(K50E006018),新开地幅(K50E007017),大黑水幅(K50E007018)区调”项目资助 |
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| 摘 要： | 内蒙古赤峰北部下二叠统于家北沟组碎屑沉积岩主要分布于华北克拉通北缘的内蒙古隆起。碎屑沉积岩主要以杂砂岩为主, 源区岩石没有经过充分的搬运、分选, 成熟度比较低。常量及稀土元素分析结果显示, 轻重稀土元素分异明显, 轻稀土元素富集, 重稀土元素含量稳定, δEu的值在0.72~0.99之间, 表现出一定的负Eu异常, 与NASC或PAAS配分模式相似, 说明物源来自于上地壳。结合前人的研究成果, 认为其母岩原岩可能以沉积岩和花岗岩为主, 或有少量的玄武岩; 物源区大地构造背景为活动大陆边缘或者大陆岛弧, 说明研究区在早二叠世或更早处于西伯利亚板块与华北克拉通缝合阶段。
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| 关 键 词： | 下二叠统 碎屑沉积岩 地球化学特征 活动大陆边缘 大陆岛弧 |
| 收稿时间： | 2011/4/28 0:00:00 |
GEOCHEMICAL CHARACTERISTICS OF CLASTIC SEDIMENTARY ROCKS FROM LOWER PERMIAN YUJIABEIGOU FORMATION IN NORTHERN CHIFENG,INNER MONGOLIA |
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| GUO Wei,YANG Xin-de,ZHANG Juan and HAO Bin.GEOCHEMICAL CHARACTERISTICS OF CLASTIC SEDIMENTARY ROCKS FROM LOWER PERMIAN YUJIABEIGOU FORMATION IN NORTHERN CHIFENG,INNER MONGOLIA[J].Journal of Geomechanics,2011,17(3):295-302. |
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| Authors: | GUO Wei YANG Xin-de ZHANG Juan and HAO Bin |
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| Institution: | 1.School of Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China2.Institute of Geomechanics, Chinese Academy of Geological Sciencses, Beijing 100081, China |
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| Abstract: | Located in northern Chifeng,Inner Mongolia,the clastic sedimentary rocks of Lower Permian Yujiabeigou Formation is mainly distributed at the Inner Mongolia uplift in the northern margin of North China craton.These clastic sedimentary rocks are dominated by graywackes,and their source rocks have not been fully handling and sorting,with relatively low maturity.The studying results have shown that light and heavy rare earth elements differentiate distinctly,and that light rare earth elements are obvious enrich... |
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| Keywords: | Lower Permian clastic sedimentary rock geochemical characteristics active continental margin continent island arc |
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