Tectonic evolution of the eastern margin of the Tibetan plateau: Insight from crustal structures using P wave receiver functions

•We study crustal thickness and velocities in the eastern margin of the Tibetan plateau.•There is a significant Moho step beneath the Longmenshan fault zone.•Low velocity anomalies are notable in the mid-lower crust beneath the plateau.•Ancient deformation is clear in the crust beneath the Sichuan Basin.