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首页> 外文期刊>Journal of Asian earth sciences >Active deformation to the north of the Altyn Tagh Fault: Constraints on the northward growth of the northern Tibetan Plateau
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Active deformation to the north of the Altyn Tagh Fault: Constraints on the northward growth of the northern Tibetan Plateau

机译：在Altyn Tagh的北部的主动变形故障：北北北方高原北方增长的限制

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摘要

Sinistral transpressive deformation occurs in the region north of the Altyn Tagh fault due to the Indo-Eurasian collision. In this region, several late Cenozoic faults have developed, and the Sanweishan fault is the key feature with clear landforms. In this study, slip rate measurements combined with several dating methods imply that the Sanweishan fault has been active with sinistral strike-slip rates of 0.33 +/- 0.04 mm/a since 14 ka BP and 0.28 +/- 0.03 mm/a since 20 ka BP, which are more than an order of magnitude smaller than that of the ATF to the south. The horizontal displacements are 1.7-5.5 m in the eastern segment and 25.0-76.0 m in the middle and western segments of the Sanweishan fault. The increment of horizontal displacement along the main Sanweishan fault is 3.0-4.0 m between paleoearthquakes, and the magnitude of the latest paleoearthquake on the middle and eastern segments of the fault is up to M = 7.2-7.5. The whole length of the Sanweishan fault is similar to 360 km or longer, which include active faults in the Yangguan and Danghe Reservoirs in the west. More components of thrusting occur on the western and eastern segments of the Sanweishan fault. The growth of the Sanweishan fault is similar to that of the ATF, but the former fault is younger, and its slip rate is much smaller. The differential slip rates on the Sanweishan fault and ATF may result in the clockwise rotation and eastward movement of the intervening block, which compresses regions to the northeast.
机译：由于印度欧洲碰撞，在阿拉尼亚塔哈故障北部地区发生尖锐变形变形。在该地区，已经开发了几个晚年的新生代断层，并且三维故障是具有清晰地貌的关键功能。在本研究中，滑动速率测量与几种约会方法相结合，意味着三维故障自23 ka BP自14kp +/- 0.04 mm / a的初始防滑速率为0.33 +/- 0.04 mm / a KA BP，比南部的ATF小于尺寸的数量级。水平位移位于东部段中的1.7-5.5米，在三维山故障的中西部和西部分段中的25.0-76.0米。沿着三维山故障的水平位移的增量在古老地震之间是3.0-4.0米，故障中间和东部段的最新古地点的大小均高达M = 7.2-7.5。三维山故障的整个长度类似于360公里或更长时间，其中包括在西部的yangguan和danghe水库中的积极故障。在三维山故障的西部和东部分段上发生了更多的推进组件。三维故障的增长与ATF的增长相似，但前者的故障更年轻，其滑动速度要小得多。三维故障和ATF上的差分滑动率可能导致中间块的顺时针旋转和向东运动，从而将区域压缩到东北部。

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