| 阿尔金断裂：几何学、性质和生长方式 |
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| 引用本文： | 崔军文,张晓卫,李朋武.阿尔金断裂：几何学、性质和生长方式[J].地球学报,2002,23(6):509-516. |
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| 作者姓名： | 崔军文 张晓卫 李朋武 |
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| 作者单位： | 中国科学院地质与地球物理研究所，北京，100029;中国科学院地质与地球物理研究所，北京，100029;中国科学院地质与地球物理研究所，北京，100029;中国科学院地质与地球物理研究所，北京，100029;中国科学院地质与地球物理研究所，北京，100029;中国科学院地质与地球物理研究所，北京，100029 |
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| 基金项目： | 中国科学院知识创新工程重要方向项目（KZCX2-SW-119）；中国科学院卢嘉锡基金资助项目；国家自然科学基金（批准号:49872077和49572153） |
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| 摘 要： | 中央造山带范围内的诸多新元古代晚期-早古生长代蛇绿岩带可视为一个系统--昆祁秦缝合系。大致可分西、中、东3段。西段包括库地-苏巴什和麻扎-康西瓦2条缝合带及西昆中微地块；中段包括阿尔金、北祁连、柴达木北缘、祁漫塔格-乌妥及东昆仑南缘5条缝合带和中-南祁连、柴达木、阿牙克库木及玛沁4个较大的微地块及诸多较小的微地块；东段为商丹缝合带和勉略缝合带及其所夹持的秦中-大别微地块。昆祁秦缝合是Rodinia超大陆经历了早-中震旦世（约780-600Ma）初期裂解阶段，晚震旦世-奥陶纪（约600-440Ma）昆祁秦多
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| 关 键 词： | 蛇绿岩 缝合系 新元古代-早古生代 中央造山带 |
The Altun Fault: Its Geometry, Nature and Mode of Growth |
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| CUI Jun-wen,ZHANG Xiao-wei and LI Peng-wu.The Altun Fault: Its Geometry, Nature and Mode of Growth[J].Acta Geoscientia Sinica,2002,23(6):509-516. |
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| Authors: | CUI Jun-wen ZHANG Xiao-wei and LI Peng-wu |
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| Institution: | Institute of Geology and Geophysics, CAS, Beijing 100029;Institute of Geology and Geophysics, CAS, Beijing 100029;Institute of Geology and Geophysics, CAS, Beijing 100029;Institute of Geology and Geophysics, CAS, Beijing 100029;Institute of Geology and Geophysics, CAS, Beijing 100029;Institute of Geology and Geophysics, CAS, Beijing 100029 |
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| Abstract: | The Altun (or Altyn) fault displays a geometry of overlapping of linear and arcuate segments and shows strong inhomo-geneity in time and space. It is a gigantic fault system with complex mechanical behaviors including thrusting,sinistral stike slip and normal slip. The strike slip and normal slip mainly occurred in the Cretaceous-Cenozoic and Plio-Quaternary respectively, whereas the thrusting was a deformation event that has played a dominant role since the late Paleozoic (for a duration of about 305 Ma). The formation of the Altun fault was related to strong inhomogeneous deformation of the massifs on its two sides (in the hinterland of the Alun Mountains contractional deformation predominated and in the Qilian massif thrust propagation was dominant). The fault experienced a dynamic process of successive break-up and connection of its segments and gradual propagation, which was synchronous with the development of an overstep thrust sequence in the Qilian massif and the uplift of the Qinghai-Tibet plateau. With southward propagation of the thrust sequence and continued uplift of the plateau, the NE tip of the Altun fault moved in a NE direction, while the SW tip grew in a SW direction. |
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| Keywords: | ophiolite suture system Sinian-Early Paleozoic Central Orogenic Belt of China |
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