Deformation partitioning in continental intraplate regions: Insights from improved GNSS observations of the Datong Basin–Range system, North China

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ID: 323054
2026
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Abstract
Summary Continental intraplate regions exhibit slow deformation yet host destructive earthquakes, posing fundamental questions about strain partitioning far from plate boundaries. Here we combine a refined GNSS velocity field and elastic block modeling to investigate the Datong basin–range system in North China, a key intraplate deformation zone at the intersection of major fault systems and Quaternary volcanism. We find that left-lateral shear (∼2 mm/yr) and NW–SE extension (∼1 mm/yr) are accommodated across multiple faults and coherent block rotations, indicating broadly distributed deformation rather than localization on a single structure. Integration with mantle tomography reveals a low-velocity anomaly beneath Datong, suggesting that upwelling-driven thermal weakening augments far-field stresses from India–Asia collision and Pacific plate rollback. This deep–shallow coupling implies non-negligible seismic hazard and highlights the role of mantle dynamics in intraplate deformation.
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Authors Xinnan Li, Zhuqi Zhang, W. C. Hammond, Ian K D Pierce, Quanxing Luo, Weiqian Yu, Wei Wei, Youjuan Li, Jingxing Yu, Chuanyou Li, Huiping Zhang, Dewen Zheng, Peizhen Zhang
Journal geophysical journal international
Year 2026
DOI
10.1093/gji/ggag308
URL
https://doi.org/10.1093/gji/ggag308
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