| 华北克拉通中元古代A型花岗岩的成因及其构造意义 |
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| 引用本文： | 陈杰, 杨明慧, 贾会冲, 张威, 刘鑫, 田刚, 白东来, 邢舟, 李竞赢. 2024. 华北克拉通中元古代A型花岗岩的成因及其构造意义. 地质科学, 59(1): 1-20. doi: 10.12017/dzkx.2024.001 |
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| 作者姓名： | 陈杰 杨明慧 贾会冲 张威 刘鑫 田刚 白东来 邢舟 李竞赢 |
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| 作者单位： | 1. 中国石油大学(北京)地球科学学院 北京 102249; 2. 中国石油大学(北京)油气资源与工程全国重点实验室 北京 102249; 3. 中国石化华北油气分公司 郑州 450006; 4. 中国石油天然气集团公司东方地球物理勘探有限责任公司研究院资料处理中心 河北涿州 072750; 5. 中国地质调查局自然资源综合调查指挥中心 北京 100055 |
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| 基金项目： | 国家自然科学基金项目（编号：41572102）和中国石化科技部项目群课题（编号：P20062-4）资助 |
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| 摘 要： | 华北克拉通保存有与Columbia超大陆裂解相关的中元古代岩浆记录。本文综述了华北克拉通中元古代A型花岗岩的时空分布、岩石学和地球化学等特征, 讨论了各期次A型花岗岩的成因及构造背景, 论述了其对华北克拉通中元古代裂解事件的指示意义。华北克拉通主要发育4期A型花岗岩: 1)~1.78 Ga A型花岗岩主要分布于南缘熊耳裂陷槽和晋陕地区; 2)~1.70 Ga A型花岗岩主要分布于北缘渣尔泰-白云鄂博和燕辽裂陷槽; 3)~1.60 Ga A型花岗岩主要分布于南缘熊耳裂陷槽; 4)~1.32 Ga A型花岗岩主要分布于北缘渣尔泰-白云鄂博和燕辽裂陷槽。这4期A型花岗岩均来源于地壳物质的部分熔融, 可能与同期伸展作用导致岩浆底侵提供热源有关。整体具有造山后伸展到陆内裂谷环境的演化序列, 且存在明显的时空差异。华北克拉通中元古代A型花岗岩记录了4期主要的裂解事件, 为华北克拉通参与了Columbia超大陆裂解提供了依据。
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| 关 键 词： | Columbia超大陆 A型花岗岩 华北克拉通 中元古代 构造背景 |
| 收稿时间： | 2023-05-10 |
| 修稿时间： | 2023-10-18 |
Genesis and tectonic significance of Mesoproterozoic A-type granites in North China Craton |
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| Chen Jie, Yang Minghui, Jia Huichong, Zhang Wei, Liu Xin, Tian Gang, Bai Donglai, Xing Zhou, Li Jingying. 2024. Genesis and tectonic significance of Mesoproterozoic A-type granites in North China Craton. Chinese Journal of Geology, 59(1): 1-20. doi: 10.12017/dzkx.2024.001 |
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| Authors: | Chen Jie Yang Minghui Jia Huichong Zhang Wei Liu Xin Tian Gang Bai Donglai Xing Zhou Li Jingying |
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| Affiliation: | 1. College of Geosciences, China University of Petroleum, Beijing 102249; 2. National Key Laboratory of Petroleum Resources and Engineering, China University of Petroleum, Beijing 102249; 3. North China Company, SINOPEC, Zhengzhou 450006; 4. Data Processing Center of Geophysical Research Institute, BGP, CNPC, Zhuozhou, Hebei 072750; 5. Command Center of Natural Resource Comprehensive Survey, CGS, Beijing 100055 |
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| Abstract: | The North China Craton preserves Mesoproterozoic magmatic records related to the breakup of the Columbia supercontinent. In this paper, the temporal and spatial distribution, petrological and geochemical characteristics of the A-type granites in the main rifts and their surrounding areas of the North China Craton in the Mesoproterozoic are reviewed. The genesis and tectonic background of the A-type granites in each period are discussed, and their indicative significance for the breakup events of the North China Craton in the Mesoproterozoic is discussed. Four stages of A-type granites are mainly developed in the North China Craton: 1)~1.78 Ga A-type granites are mainly distributed in the Xiong'er Rift and Shanxi-Shaanxi area; 2)~1.70 Ga A-type granites are mainly distributed in the northern Zha'ertai-Bayan Obo and Yanliao rifts; 3)~1.60 Ga A-type granites are mainly distributed in the southern Xiong'er Rift; 4)~1.32 Ga A-type granites are mainly distributed in the northern Zha'ertai-Bayan Obo and Yanliao rifts. These four A-type granites are derived from the partial melting of crustal materials, which may be related to the heat source provided by the crustal melting of magma underplating caused by the same period of extension. As a whole, there is an evolution sequence from post-orogenic extension to intracontinental rift environment, and there are obvious spatial and temporal differences in the region. The A-type granites of the Mesoproterozoic in the North China Craton recorded four major breakup events, providing evidence that the North China Craton might have participated in the breakup of the Columbia supercontinent. |
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| Keywords: | Columbia supercontinent A-type granite North China Craton Mesoproterozoic Tectonic background |
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