| 青藏高原北缘新构造运动特征 |
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| 引用本文： | 唐哲民,崔军文.青藏高原北缘新构造运动特征[J].新疆地质,1996(3). |
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| 作者姓名： | 唐哲民 崔军文 |
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| 作者单位： | 中国地质科学院地质研究所岩石圈中心 |
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| 摘 要： | ＮＥＥ向阿尔金主断裂带的新构造运动以左旋压扭性活动为特征，仅西端发育张性构造，并可划分出两期变形，新构造运动强度在时间上自上新世晚期开始至第四纪断裂活动强度增大，在空间上自ＳＷＷ向ＮＥＥ方向断裂活动强度逐渐减弱；柴达木北缘的新构造运动可划分为两期，其主要构造特征表现为向柴达木盆地逆冲的前进式叠瓦道冲带，柴达木盆地第四纪时的北界相对于第三纪时的北界向南迁移了数十公里；河西走廊盆地的新构造运动主要表现为盆地边缘断裂的逆冲兼走滑，盆地接受新生代沉积、盆地内第三系的轴面南倾的褶皱；ＮＥＥ向阿尔金主断裂带与其南侧的ＮＷＷ向断裂带是在统一构造应力场作用下相互协调、同时活动的两组关系紧密的构造带，两者的共同活动构成了断块运动。
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| 关 键 词： | 青藏高原，阿尔金主断裂带，柴达木北缘，河西走廊盆地，新构造运动 |
KINEMATIC CHARACTER OF NEOTECTONIC MOVEMENT IN NORTHERN MARGIN OF QINGHAI-TIBET PLATEAU |
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| Tang Zhemin, Cui Junwen.KINEMATIC CHARACTER OF NEOTECTONIC MOVEMENT IN NORTHERN MARGIN OF QINGHAI-TIBET PLATEAU[J].Xinjiang Geology,1996(3). |
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| Authors: | Tang Zhemin Cui Junwen |
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| Abstract: | Neotectonic movement of NEE trend Altun main fault zone has character of sinistral transpression ,extensional structure only in the west end, and has two phase deformations. Neotectonic movements got enhanced from late Pliocene to Quaternary,and weakened gradually in SWW orientation. Neotectonic movement at northern margin of Qaidam basin is divided into two phases, mainly characterized by progressive imbricated thrust fault zone whichis thrusted to Qaidam basin. Northern boundary of Qaidam basin moves several tens of kilometers towards south relative to the boundary during Quaternary. Neotectonic movement of Hexi Corridor basin is charsacterized by thrusting and strike-slip movement of basin margin faults,Cenozoic deposition in basin,folding with south - dipping axial plane of Tertiary. NEE trend Altun main fault zone and NEW trend fault zone in the south side are closely related,influenced by same structural stress field and activeted at the same time. Their coherent movement caused the motion of faulted blocks. |
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| Keywords: | Qinghai-Tibet plateau Altun main fault zone northern margin of Qaidam basin Hexi Corridor basin neotectonic movement |
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