| 郯庐断裂带的平移运动与成因 |
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| 引用本文： | 朱光,刘国生,牛漫兰,宋传中,王道轩.郯庐断裂带的平移运动与成因[J].地质通报,2003,22(3):200-207. |
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| 作者姓名： | 朱光 刘国生 牛漫兰 宋传中 王道轩 |
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| 作者单位： | 合肥工业大学资源与环境工程学院,安徽,合肥,230009 |
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| 基金项目： | 国家自然科学基金项目(49872074、40272094)，教育部骨干教师项目资助。 |
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| 摘 要： | 在华北、华南板块碰撞期间，郯庐断裂带究竟是何种边界仍是没有解决的重大地学问题，许多学者对此提出了不同的构造解释模式。关于郯庐断裂的平移距离仍存在着较大的分歧与有待深入研究之处。在华北、华南板块拼合之后，郯庐断裂带发生了一次大规模的左行平移，其糜棱岩的^40Ar／^39Ar年龄为132～119Ma，指示为早白垩世的平移活动，平移活动中伴生了强烈的岩浆活动。这期左行平移标志着中国东部构造的重大转折，是滨太平洋构造对前期古特提斯构造的叠加，其动力学机制为太平洋区伊侨奈岐板块突然出现的高速斜向俯冲。
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| 关 键 词： | 郯庐断裂带 大别-苏鲁造山带 左行平移 构造模式 伊佐奈岐板块 |
| 文章编号： | 1671-2552(2003)03-0200-08 |
| 修稿时间： | 2002年6月17日 |
Transcurrent movement and genesis of the Tan-Lu fault zone |
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| ZHU Guang,LIU Guosheng,NIU Manlan,SONG Chuanzhong,WANG Daoxuan.Transcurrent movement and genesis of the Tan-Lu fault zone[J].Geologcal Bulletin OF China,2003,22(3):200-207. |
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| Authors: | ZHU Guang LIU Guosheng NIU Manlan SONG Chuanzhong WANG Daoxuan |
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| Abstract: | It is still an outstanding major scientific issue what type of boundary the Tan-Lu fault was dur-ing collision of the North and South China plates.Different interpretative tectonic models have been pro-posed.Divergent views exist as to the magnitude of displacement of the fault zone and more studies are needed.The fault zone experienced a large-scale left-lateral displacement after the collage of the North and South China plates. 40 Ar / 39 Ar ages of relative mylonites range from132to119Ma ,indicating Early Creta-ceous wrench faulting.The Early Cretaceous wrench faulting was accompanied by intense magmatism.The left-lateral displacement of the Tan-Lu fault zone in the Early Cretaceous marks very important tectonic turning in eastern China,which shows overprinting of circum-Pacific tectonics on pre-existing Tethys tec-tonics.Its dynamic mechanism is the sudden onset of high-speed oblique subduction of the Izanagi plate in the Pacific region. |
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| Keywords: | Tan-Lu fault zone Dabie-Sulu orogenic belt left-lateral displacement tectonic model Izanagi plate |
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