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June 1, 2026Journal of Geophysical Research Solid Earth

Plate‐Plume Interactions in Southeast Asia: New Insight From Sn‐Wave Tomography

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Authors

YLYuan LiJLJianshe LeiJHJinli Huang

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Overview

Randomized trial reveals new geodynamic insights from shear-wave velocity model in Southeast Asia, suggesting complex mantle interactions.

Key Points

  • This research aims to derive a shear-wave velocity model of the upper mantle beneath Southeast Asia, focusing on plate-plume interactions.
  • Derived a shear-wave velocity model using Sn-wave arrival times from the ISC-EHB Bulletin.
  • Identified high and low-velocity anomalies linked to tectonics and mantle conditions.
  • Integrated previous anisotropy and shear-wave measurements to analyze geodynamic flow.
  • Average Sn-wave velocity in Southeast Asia is 4.55 km/s, revealing significant lateral variations.
  • High-velocity anomalies (up to +0.40 km/s) found at trenches and collision zones indicate dense lithospheric materials.
  • Low-velocity anomalies (as low as -0.40 km/s) beneath volcanic areas suggest a hot, partially melting mantle wedge.

Cite This Study

Li et al. (2026) studied this question.

synapsesocial.com/papers/6a1d234302fbce9130638df1https://doi.org/10.1029/2025jb032374
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