Scholarlink

<p>The Indian, Arabian and Eurasian continental plate collision zones are tectonically active regions on Earth, characterized by intense seismicity and complex faulting patterns. In this study, teleseismic body-waveform inversion is applied to determine source parameters of 98 moderate to large earthquakes distributed across the Indian and Eurasian (IE) plates collision zone, the Arabian and Eurasian (AE) plates collision zone, and the transitional Makran accretionary wedge. The IE collision, initiated during the Paleocene-Eocene following closure of the Neo-Tethys Ocean, and the younger AE collision, active since the Early Miocene, exhibit contrasting tectonic styles. Earthquakes in both collision zones are dominated by reverse faulting within the upper and middle crust. However, the average dip of north-dipping thrust faults in the AE zone (∼35°) is much steeper than that in the IE zone (∼15°), indicating differences in lithospheric structure and mechanical coupling during continental convergence. In contrast, the Makran transition zone exhibits a mixture of reverse, strike-slip, and normal faulting mechanisms, with seismicity extending to depths of ∼70 km, reflecting deformation within the subducting Arabian slab and complex stress partitioning within the accretionary wedge. These results provide improved regional constraints on earthquake depth distributions and faulting styles, offering new insights into tectonic processes and seismic hazard potential across collision subduction transition systems.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Source parameters of shallow earthquakes in the Indian-Arabian-Eurasian plate collision zone

  • 期刊论文

  • 发表日期：

    2026年7月29日

查看全文
  • Surih Sibaghatullah Jagirani,
  • Ling Bai,
  • Guohui Li,
  • Huili Zhan,
  • Zhiwen Chen,
  • Chaoya Liu,
  • Hongru Li

摘要

The Indian, Arabian and Eurasian continental plate collision zones are tectonically active regions on Earth, characterized by intense seismicity and complex faulting patterns. In this study, teleseismic body-waveform inversion is applied to determine source parameters of 98 moderate to large earthquakes distributed across the Indian and Eurasian (IE) plates collision zone, the Arabian and Eurasian (AE) plates collision zone, and the transitional Makran accretionary wedge. The IE collision, initiated during the Paleocene-Eocene following closure of the Neo-Tethys Ocean, and the younger AE collision, active since the Early Miocene, exhibit contrasting tectonic styles. Earthquakes in both collision zones are dominated by reverse faulting within the upper and middle crust. However, the average dip of north-dipping thrust faults in the AE zone (∼35°) is much steeper than that in the IE zone (∼15°), indicating differences in lithospheric structure and mechanical coupling during continental convergence. In contrast, the Makran transition zone exhibits a mixture of reverse, strike-slip, and normal faulting mechanisms, with seismicity extending to depths of ∼70 km, reflecting deformation within the subducting Arabian slab and complex stress partitioning within the accretionary wedge. These results provide improved regional constraints on earthquake depth distributions and faulting styles, offering new insights into tectonic processes and seismic hazard potential across collision subduction transition systems.