Upper Mantle beneath the Myanmar and Surrounding Tomography: New Insight into Plate Subduction and Volcanism

Myanmar and its surrounding areas have complex topography strong tectonic movement, which has always been a challenge to most geoscientists. We used teleseismic tomography study the subsurface velocity structure in this area. present new P-wave tomographic model beneath by inverting 129,788 arrival-time data recorded 372 stations. found an inclined high-velocity subducting plate central Myanmar, where dip angle becomes smaller near 25°~26°N, seismic depth is limited below 200 km. The Indian oceanic lithosphere being detached from continental lithosphere, limits of earthquake. active Tengchong volcano underlain prominent low-velocity (low-V) anomaly shallow mantle, may be caused subduction dehydration Burma microplate (or plate). formation Singu related mantle flow Qinghai–Tibet plateau tearing plate. Yangtze craton (beneath Sichuan Basin) shows anomaly, both deep parts destroyed, upwelling heat flow.