| 华北中生代岩浆作用与去克拉通化 |
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| 引用本文： | 孙金凤,杨进辉.华北中生代岩浆作用与去克拉通化[J].岩石矿物学杂志,2013,32(5):577-592. |
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| 作者姓名： | 孙金凤 杨进辉 |
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| 作者单位： | 中国科学院大学 中国科学院计算地球动力学重点实验室, 北京 100049;中国科学院地质 与地球物理研究所 岩石圈演化国家重点实验室, 北京 100029 |
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| 基金项目： | 国家自然科学基金项目(40925007,41202046) |
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| 摘 要： | 华北是全球古老克拉通遭受破坏最明显和最典型的地区,其去克拉通化作用的时间、范围和机制等重要科学问题是国内外研究的热点。大规模岩浆作用是去克拉通化作用的地质表现之一,通过对华北地区侵入岩侵位时代、源区、成岩过程的研究,可有效反演其去克拉通化作用的时空范围、过程及可能的动力学机制。华北东部广泛发育大面积的中生代侵入岩,本文在作者近十年研究的基础上,通过总结华北东部中生代侵入岩的锆石U-Pb年代学资料,厘定了华北东部中生代岩浆活动主要分为三叠纪、侏罗纪和早白垩世三期;通过岩浆源区、岩石成因研究,探讨不同时期岩石圈(地幔和大陆地壳)性质和厚度的转变及破坏的空间范围;在此基础上,结合区域地质特征初步探讨了华北去克拉通化的地球动力学机制。
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| 关 键 词： | 华北克拉通 去克拉通化作用 中生代 花岗岩 |
| 收稿时间： | 2013/7/8 0:00:00 |
| 修稿时间： | 2013/8/8 0:00:00 |
Mesozoic magmatism related to decratonization of the North China Craton |
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| SUN Jin-feng and YANG Jin-hui.Mesozoic magmatism related to decratonization of the North China Craton[J].Acta Petrologica Et Mineralogica,2013,32(5):577-592. |
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| Authors: | SUN Jin-feng and YANG Jin-hui |
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| Institution: | Key Laboratory of Computational Geodynamics, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Beijing 100049, China;State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China |
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| Abstract: | The North China Craton is the most obvious and most typical area for the study of the destruction of the craton. The timing, scale and geodynamics of decratonization are hot issues among the geoscientists both in China and abroad. Large-scale magmatism is one of the geological responses to decratonization. The ages, sources of magmas and petrogenetic processes of magmatic rocks can be used to constrain the timing, scale and possible geodynamics of decratonization. Mesozoic intrusive rocks are widely distributed in the eastern North China Craton. Based on research works conducted in the past ten years or so, the authors summarize zircon U-Pb ages of the Mesozoic intrusive rocks in eastern North China Craton, which show mainly three stages of magmatism in eastern North China Craton, i.e., Triassic, Jurassic and Early Cretaceous. Geochemical features were used to trace their magma sources and petrogenesis, and the transition of the nature and thickness of the lithosphere and the spatial scale of decratonization were further constrained. On such a basis, the possible geodynamic mechanism of decratonization of the North China Craton is discussed in combination with regional geology. |
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| Keywords: | North China Craton decratonization Mesozoic granitoids |
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