| 华北北部中生代岩墙群 |
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| 引用本文： | 邵济安,张履桥.华北北部中生代岩墙群[J].岩石学报,2002,18(3):312-318. |
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| 作者姓名： | 邵济安 张履桥 |
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| 作者单位： | 1. 北京大学地质系,北京,100871
2. 内蒙古地质研究所,呼和浩特,010020 |
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| 基金项目： | 国家自然科学基金项目 (49872 0 79, 40 0 72 0 73 )，中国科学院知识创新工程重大项目 (KZCX1 -0 7)研究成果 |
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| 摘 要： | 岩墙群是深源岩浆浅侵位的产物，它可提供有关壳-幔演化的重要信息。通过华北北部大同早中生代碳酸岩-煌斑岩岩墙群、赤峰早中生代闪长玢岩岩墙群、林西中生代辉绿岩岩墙群、京北晚中生代双峰式岩墙群的对比研究，揭示了华北中生代存在的两次底侵作用及其相关的伸展作用。华北早、晚中生代岩墙群与晋北地区元古代岩墙群的初步对比，从一个侧面反映了华北壳幔的演变。
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| 关 键 词： | 中生代 岩墙群 形成机制 底侵作用 华北地区 伸展作用 |
| 文章编号： | 1000-0569/2002/018(03)-0312-18 |
| 修稿时间： | 2001年12月20 |
Mesozoic dyke swarms in the north of North China. |
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| Shao JA and Zhang LQ. ..Mesozoic dyke swarms in the north of North China.[J].Acta Petrologica Sinica,2002,18(3):312-318. |
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| Authors: | Shao JA and Zhang LQ |
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| Institution: | Shao JA and Zhang LQ. . . Department of Geology,Peking University,Beijing,China . Geological Bureau of Inner Mongoli,Huhhot,China |
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| Abstract: | Dyke swarms are products of typhonic magma which may provide important information about the crust mantle evolution. This work studies comparatively several dyke swarms in the north of North China, including the Early Mesozoic Datong carbonatite lamprophyre dyke swarms, Early Mesozoic Chifeng dioritic porphyrite diabasic dyke swarms, Mesozoic Linxi diabasic dyke swarms, and North Beijing Late Mesozoic bimodal dyke swarms.Thus it is revealed that there were two successive processes of underplating and accompanying extension in the Mesozoic in North China.Comparison of the Early Mesozoic, Late Mesozoic, and Protozoic dyke swarms in North in certain extent reflects revolution of the mantle composition in North China. |
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| Keywords: | North China Mesozoic Dyke swarms Formation mechanism Comparative research |
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