嘉黎断裂带易贡-察隅段第四纪活动性特征

陆诗铭; 吴中海; 韩帅; 胡渊; 凡福新

doi:10.3799/dqkx.2025.065

Volume 50 Issue 8

Aug. 2025

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Lu Shiming, Wu Zhonghai, Han Shuai, Hu Yuan, Fan Fuxin, 2025. Quaternary Activity Characteristics of the Yiong-Zayu Segment of the Jiali Fault Zone. Earth Science, 50(8): 3052-3069. doi: 10.3799/dqkx.2025.065

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Lu Shiming, Wu Zhonghai, Han Shuai, Hu Yuan, Fan Fuxin, 2025. Quaternary Activity Characteristics of the Yiong-Zayu Segment of the Jiali Fault Zone. Earth Science, 50(8): 3052-3069. doi: 10.3799/dqkx.2025.065

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Quaternary Activity Characteristics of the Yiong-Zayu Segment of the Jiali Fault Zone

doi: 10.3799/dqkx.2025.065

Lu Shiming^{1, 2
,
,},
Wu Zhonghai^{1, 2
,
,
,},
Han Shuai^{1, 2},
Hu Yuan^{1, 3},
Fan Fuxin^{1, 4}

1.
Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, China
2.
Key Laboratory of Active Tectonics and Geological Safety, Ministry of Natural Resources, Beijing 100081, China
3.
School of Earth and Resources, China University of Geosciences, Beijing 100083, China
4.
Faculty of Earth Sciences, China University of Geosciences, Wuhan 430074, China

Received Date: 2025-04-15
Publish Date: 2025-08-25

Abstract

Abstract

The Jiali Fault Zone is one of the major active tectonic structures along the southeastern margin of the Tibetan Plateau, playing a crucial role in regional seismicity and geomorphic evolution. This study systematically analyzes the tectonic activity of the Yiong-Zayu segment of the Jiali Fault Zone by integrating high-resolution remote sensing imagery, DEM data, field investigations, and focal mechanism solutions.The results indicate that the Jiali Fault Zone has exhibited weak tectonic activity since the Quaternary, with no significant evidence of right-lateral strike-slip motion. Instead, localized NW- and nearly E-W-trending normal faulting has been observed along certain segments, and seismic activity is predominantly characterized by local normal-faulting earthquakes. GPS velocity analysis reveals that the fault exhibits low horizontal slip rates, with deformation primarily characterized by extension, suggesting that it does not function as a major boundary fault.By integrating previous studies, we further infer that the formation of local normal faults is primarily influenced by localized shear stress or post-glacial rebound. Moreover, the kinematic model of southeastern Tibet is more consistent with a clockwise rotational extrusion mechanism.
- Jiali Fault Zone,
- Tibetan Plateau,
- tectonic geomorphology,
- normal fault,
- clockwise rotational extrusion model,
- tectonics

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References(61)

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Quaternary Activity Characteristics of the Yiong-Zayu Segment of the Jiali Fault Zone

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