| 阿尔金断裂带中段现今构造形变模式的InSAR研究 |
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| 引用本文： | 邱江涛,朱良玉,王随随.阿尔金断裂带中段现今构造形变模式的InSAR研究[J].大地测量与地球动力学,2018,38(8):783-786. |
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| 作者姓名： | 邱江涛 朱良玉 王随随 |
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| 摘 要： | 利用2007～2010年间14景ALOS PALSAR数据及SBAS InSAR技术，获取阿尔金断裂带中段91°E附近现今地壳形变速率场，并反演该地区断层的滑动速率和闭锁深度。结果表明，阿尔金断裂中段地区的形变速率自北向南呈3个线性梯度变化区，分别为阿尔金山东段8～12 mm/a、索尔库里盆地6～7 mm/a、阿尔金断裂带以南约0 mm/a。3个速率梯度变化区主要集中在喀腊达坂断裂和阿尔金主断裂上；拟合的断层就位于金雁山南缘、喀腊达坂断裂南邻，走滑速率从西（7.1 mm/a）向东（14.0 mm/a）逐渐增大，闭锁深度自西(4.5 km)向东(10.6 km)逐渐趋深。结合前人研究推测，金雁山（阿尔金山链东部）与索尔库里拉分盆地组成的复合破裂构造模式，是转换断层运动时应力和应变调整的主要驱动机制。
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| 关 键 词： | InSAR 阿尔金断裂带 滑动速率 大地测量反演 构造形变 |
Study on the Contemporary Tectonic Deformation Pattern of the Middle Altyn Tagh Fault Zone as Revealed by InSAR Measurements |
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| QIU Jiangtao,ZHU Liangyu,WANG Suisui.Study on the Contemporary Tectonic Deformation Pattern of the Middle Altyn Tagh Fault Zone as Revealed by InSAR Measurements[J].Journal of Geodesy and Geodynamics,2018,38(8):783-786. |
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| Authors: | QIU Jiangtao ZHU Liangyu WANG Suisui |
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| Abstract: | The present-day crustal deformation rates near 91° E in the middle section of the Altyn Tagh fault zone are obtained using SBAS InSAR based on 14 ALOS PALSAR scene imagery from 2007 to 2010, and the slip velocities and the locked depth in different segments are calculated as well. The results show that the deformation pattern from north to south is characterized by linear decrease with three different rate gradients. The rates are 8~12 mm/a in the eastern part of the Altyn mountains, 6~7 mm/a in the Xorkol basin, and 0 mm/a in the south of the Altyn Tagh fault, respectively. The significant rate changes of the three sections are concentrated on the two fractured zones of the Kaladaban fault and the Altyn Tagh fault. The best fitted fault is located at the southern margin of Jinyan mountains. The strike-slip rates increase from 7.1 mm/a in the west to 14.0 mm/a in the east. The locking depth is increased from 4.5 km in the west to 10.6 km in the east. Referring to previous research results, it is inferred that the Jinyan mountain and the Xorkol basin form a composite fault structure, which is the main adjustment model of strain and stress during the transition fault movements. |
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| Keywords: | InSAR Altyn Tagh fault slip rate geodetic inversion crustal deformation |
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