| 华南中生代变质核杂岩构造及其与岩石圈减薄机制的关系初探 |
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| 引用本文： | 沈晓明,张海祥,张伯友.华南中生代变质核杂岩构造及其与岩石圈减薄机制的关系初探[J].大地构造与成矿学,2008,32(1):11-19. |
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| 作者姓名： | 沈晓明 张海祥 张伯友 |
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| 作者单位： | 1. 中国科学院广州地球化学研究所,广东,广州,510640;中国科学院研究生院,北京,1000493
2. 中国科学院广州地球化学研究所,广东,广州,510640 |
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| 摘 要： | 变质核杂岩是岩石圈伸展减薄的典型构造形式,也是研究岩石圈减薄机制的"窗口"。在大量前人研究的基础上,对华南中生代岩石圈减薄的时间与机制和华南变质核杂岩的研究现状进行了综述。变质核杂岩是华南中生代岩石圈伸展与减薄的重要产物,它在华南地区的广泛出现为讨论岩石圈伸展与减薄作用提供了重要约束。同位素地质年代统计表明,华南地区变质核杂岩主体形成与剥露的峰期介于140~120Ma的早白垩世,它们的出现与华南大规模岩石圈减薄、岩浆活动及大规模成矿作用的时间非常吻合。本文还介绍了一些关于变质核杂岩和岩石圈减薄机制研究的最新进展,这些研究进展表明,加强对变质核杂岩等伸展构造的研究,对研究岩石圈板块演化的时间、机制、运动学,进而建立更加完善的岩石圈演化模型具有重要意义。
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| 关 键 词： | 变质核杂岩 岩石圈减薄 中生代 华南 |
| 文章编号： | 1001-1552（2008）01-0011-09 |
| 收稿时间： | 2007-06-06 |
| 修稿时间： | 2007-07-20 |
A PRELIMINARY STUDY OF RELATIONSHIP BETWEEN, METAMORPHIC CORE COMPLEXES AND LITHOSPHERIC THINNING OVER THE MESOZOIC IN SOUTH CHINA |
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| SHEN Xiaoming,ZHANG Haixiang,ZHANG Boyou.A PRELIMINARY STUDY OF RELATIONSHIP BETWEEN, METAMORPHIC CORE COMPLEXES AND LITHOSPHERIC THINNING OVER THE MESOZOIC IN SOUTH CHINA[J].Geotectonica et Metallogenia,2008,32(1):11-19. |
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| Authors: | SHEN Xiaoming ZHANG Haixiang ZHANG Boyou |
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| Abstract: | The metamorphic core complex is a typical pattern of lithospheric extending and thinning.It is also a window through which we may reveal the thinning mechanism of a lithosphere.This paper will review the geochronology and mechanism of lithospheric thinning and the metamorphic core complexes,an important product of lithospheric processes(extending and thinning)during the Mesozoic in South China.The statistics of isotope geochronology of the metamorphic core complexes in South China indicates that the peak time of its formation and erosion is at 140-120Ma.This is well consistent with the time of lithospheric thinning,magma activity and mineralization.Some advanced studies on the topic suggest that it is of important significance to study the history,mechanism and kinematics of the lithospheric evolution for better understanding metamorphic core complexes. |
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| Keywords: | metamorphic core complexes lithospheric thinning Mesozoic era South China |
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