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This research aims to derive a shear-wave velocity model of the upper mantle beneath Southeast Asia, focusing on plate-plume interactions.

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

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

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.

Li et al. (2026) studied this question.

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