Slab remnants beneath the Myanmar terrane evidencing double subduction of the Neo-Tethyan Ocean.

ABSTRACT: Closure of the Neo-Tethyan Ocean is one of the most significant tectonic events of the Cenozoic, forming the longest continental collision belt on Earth and influencing global climate and biodiversity. However, whether late Mesozoic subduction of the Neo-Tethyan Ocean occurred along one single or a double subduction system remains controversial. Here, upper mantle imaging from seismic tomography and waveform modeling in the Myanmar region reveals two prominent, parallel, slab-like structures with high seismic velocities that trend to the north-south and dip to the east. The western high-velocity zone has been observed previously and represents the modern subducting slab. The eastern zone has not been previously reported and exhibits high-velocity anomalies of 1.0 to 2.5% to a depth of ~300

SUBMITTER: Yang S 

PROVIDER: S-EPMC9417170 | biostudies-literature | 2022 Aug

REPOSITORIES: biostudies-literature