| 华北克拉通北缘显生宙四次底侵作用及其构造-岩浆活动与深部背景 |
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| 引用本文： | 邵济安,周新华,张履桥.华北克拉通北缘显生宙四次底侵作用及其构造-岩浆活动与深部背景[J].地学前缘,2020,27(4):124-134. |
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| 作者姓名： | 邵济安 周新华 张履桥 |
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| 作者单位： | 1.造山带与地壳演化教育部重点实验室; 北京大学 地球与空间科学学院, 北京 1008712.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 1000293.中国科学院大学 地球与行星科学学院, 北京 1000494.内蒙古地质研究所, 内蒙古 呼和浩特 010020 |
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| 基金项目： | 中国地质调查局地质调查项目(121201102000150009) |
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| 摘 要： | 通过对华北克拉通北缘显生宙四次(P1,T3,J1,K1)底侵作用的研究,将华北克拉通的活化与岩石圈深部地幔物质的底辟体上涌联系起来。不同阶段底侵作用在岩浆来源深度、与构造格局关系、对地壳垂向增生的贡献、幔源物质脉动式上涌等方面的差异与变化,显示它们是一个分阶段连续热演化的深部过程,其动力学机制是深部的高热流和地幔物质的向上运移。对应于地幔物质上涌,必然存在同期的地幔底辟体隆起的岩石圈结构变化。通过对华北中生代盆山系形成机制的讨论,认为该区高分辨率面波层析成像所显示的地幔底辟体上涌的特征可以反映中生代岩石圈底侵作用的深部背景。
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| 关 键 词： | 华北克拉通北缘 显生宙 底侵作用 地幔底辟体上涌 |
| 收稿时间： | 2019-12-08 |
Phanerozoic multiple underplatings beneath the north margin of the North China Craton and the implications for tectono-magmatism and deep dynamics |
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| SHAO Ji'an,ZHOU Xinhua,ZHANG Lü,qiao.Phanerozoic multiple underplatings beneath the north margin of the North China Craton and the implications for tectono-magmatism and deep dynamics[J].Earth Science Frontiers,2020,27(4):124-134. |
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| Authors: | SHAO Ji'an ZHOU Xinhua ZHANG Lü qiao |
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| Institution: | 1. The Key Laboratory of Orogenic Belts and Crustal Evolution, Ministry of Education; School of Earth and Space Sciences, Peking University, Beijing 100871, China2. State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China3. College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing 100049, China4. Geological Bureau of Inner Mongolia, Huhhot 010020, China |
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| Abstract: | Based on the study of underplating activities beneath the north margin of the North China Craton (NCC) in the Early Permian (P1), Late Triassic (T3), Early Jurassic (J1) and Early Cretaceous (K1), we demonstrated here that the reactivation of the NCC is caused by diapiric upwelling of deep lithospheric mantle. As revealed by comparative research, underplating in each stage shows difference and variation in its magma source depth, relationship to the tectonic framework, contribution to the vertical crustal accretion, and impulse upwelling of mantle magma, indicating a series of step by step continuous deep-seated thermal evolutionary processes and its dynamic mechanism is the deep high heat flux and upward migration of mantle materials. Mantle material upwelling must accompanied by a lithospheric structural change in mantle diapir uplift. Through discussion on the formation mechanism of the Mesozoic North China basin-range system, we suggest that the current upwelling characteristics of mantle diapirs, revealed by high resolution surface wave tomography in this area, could reflect the deep settings of the Mesozoic lithospheric intrusion. |
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| Keywords: | north margin of the North China Craton Phanerozoic underplating diapiric upwelling of mantle |
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