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Present-Day Tectonic Stress Field Inversion of the Qinghai-Xizang Plateau Based on Seismic Focal Mechanisms
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Mingming ZHANG1, 2, Xinsuo ZHOU1, 2, Xiaohui LI1, 2, Feng YUAN1, 2, Jing DING1, 2, Liang WANG3
Journal of Geodesy and Geodynamics | 2026, 46(5) : 522 - 529
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Journal of Geodesy and Geodynamics | 2026, 46(5): 522-529
Present-Day Tectonic Stress Field Inversion of the Qinghai-Xizang Plateau Based on Seismic Focal Mechanisms
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Mingming ZHANG1, 2, Xinsuo ZHOU1, 2, Xiaohui LI1, 2, Feng YUAN1, 2, Jing DING1, 2, Liang WANG3
Affiliations
  • 1 School of Resources and Environmental Engineering, Hefei University of Technology, Hefei 230009, China
  • 2 Anhui Provincial Key Laboratory for Deep Exploration, Evaluation and Utilization of Strategic Mineral Resources, Hefei 230009, China
  • 3 Anhui Institute of Geological Surveying and Mapping Technology, Hefei 230022, China
Published: 2026-05-15 doi: 10.14075/j.jgg.2025.06.210
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Based on the MSATSI method with 1°×1° grid resolution, we inverted the present-day tectonic stress field of the Qinghai-Xizang plateau. The results show that: 1) The focal mechanisms are predominantly strike-slip and thrust types, with 72.70% of P-axes and 58.97% of T-axes plunging less than 30°, indicating that the Qinghai-Xizang plateau is dominated by horizontal compression and shear stress. 2) The stress shape ratio R is significantly higher at the plateau margins than in the interior, with 76.21% of maximum principal compressive stress axes (σ1) plunging less than 15° and trending overall NNE-SSW. 3) The maximum horizontal stress (SHmax) of Qinghai-Xizang plateau rotates clockwise around the eastern syntaxis. In the shallow crust (0 to 10 km), SHmax direction aligns with GPS velocity fields and is controlled by active tectonics. SHmax of the northeast margin of Qinghai-Xizang plateau, northeast of the Longmenshan, rotates counterclockwise by 20° to 30° at 10 to 20 km depth, indicating decoupling between shallow and deep stress fields, likely associated with differential deformation mechanisms of upper strike-slip and deep thrust thickening.

Qinghai-Xizang plateau  /  focal mechanism  /  stress field inversion  /  MSATSI  /  maximum horizontal stress
张明明, 周新锁, 李晓晖, 袁峰, 丁静, 王亮. 基于地震震源机制的青藏高原现今构造应力场反演. 大地测量与地球动力学, 2026 , 46 (5) : 522 -529 . DOI: 10.14075/j.jgg.2025.06.210
Mingming ZHANG, Xinsuo ZHOU, Xiaohui LI, Feng YUAN, Jing DING, Liang WANG. Present-Day Tectonic Stress Field Inversion of the Qinghai-Xizang Plateau Based on Seismic Focal Mechanisms[J]. Journal of Geodesy and Geodynamics, 2026 , 46 (5) : 522 -529 . DOI: 10.14075/j.jgg.2025.06.210
Appendix
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Year 2026 volume 46 Issue 5
32
12
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Article Info
doi: 10.14075/j.jgg.2025.06.210
  • Receive Date：2025-06-24
  • Online Date：2026-10-29
  • Published：2026-05-15
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  • Received：2025-06-24
Funding
Affiliations
    1 School of Resources and Environmental Engineering, Hefei University of Technology, Hefei 230009, China
    2 Anhui Provincial Key Laboratory for Deep Exploration, Evaluation and Utilization of Strategic Mineral Resources, Hefei 230009, China
    3 Anhui Institute of Geological Surveying and Mapping Technology, Hefei 230022, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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