| 中国东南部中生代基性岩脉时空分布与形成机理 |
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| 引用本文： | 娄峰,马浩明,刘延勇,李宏卫,杨燕娜,陈耀均.中国东南部中生代基性岩脉时空分布与形成机理[J].地学前缘,2011,18(1):15-23. |
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| 作者姓名： | 娄峰 马浩明 刘延勇 李宏卫 杨燕娜 陈耀均 |
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| 作者单位： | 中山大学地球科学系;广东省地震局;广州市地质调查院;广东省佛山地质局; |
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| 基金项目： | 高等学校博士学科点基金项目(20070558033) |
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| 摘 要： | 中国东南部发育的基性岩脉见于中生代各个时期,其年龄从内陆至沿海逐渐变新,与区内花岗岩年龄有相同的变化趋势,但两者活动高峰期不重合。基性岩脉主要发育于花岗岩体内部的拉裂带,鲜见穿过花岗岩上方或周围的沉积变质盖层。中生代各时期的基性岩脉与相应时期的中酸性和基性火山岩浆活动具有清晰的分带现象。进一步研究表明,基性岩脉与同期基性火山岩应是同源不同相的产物,而中酸性喷发的岩浆与基性喷发(侵入)的岩浆,则可能分别来自壳内熔融层和壳下(地幔)熔融层或壳内岩浆层的上部和下部。中酸性与基性岩浆活动的"错峰"现象和基性岩脉带的"迁移"现象,均与本区中生代陆壳系统的内能变化有关。
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| 关 键 词： | 基性岩脉 花岗岩 壳内熔融层 岩浆喷发带 |
Time-space distribution and formation mechanism of the Mesozoic mafic dikes in Southeast China |
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| Lou Feng,Ma Haoming,Liu Yanyong,Li Hongwei,Yang Yanna,Chen Yaojun.Time-space distribution and formation mechanism of the Mesozoic mafic dikes in Southeast China[J].Earth Science Frontiers,2011,18(1):15-23. |
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| Authors: | Lou Feng Ma Haoming Liu Yanyong Li Hongwei Yang Yanna Chen Yaojun |
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| Institution: | Lou Feng1,Ma Haoming2,Liu Yanyong3,Li Hongwei1,Yang Yanna1,Chen Yaojun4 1.Department of Earth Sciences,Sun Yat-Sen University,Guangzhou 510275,China2.Earthquake Administration of Guangdong Province,Guangzhou 510070,China3.Guangzhou Institute of Geological Survey,Guangzhou 510440,China4.Foshan Geological Bureau of Guangdong Province,Foshan 528000,China |
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| Abstract: | Mafic dikes are found forming in different periods of the Mesozoic in Southeast China.Ages of the dikes show a spatial variation as that of the Mesozoic granites of this area,i.e.becoming younger from inland to coastal region,but the activity-fastigia of mafic dikes and granites are not synchronous,and that of the former occurred relatively behind.Mafic dikes usually occurred limited in tensional cracks developed within granite bodies,seldom to perforate into the fractures in the country rocks of granite bo... |
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| Keywords: | mafic dikes granite crustal melting layer magma eruption belts |
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