Lithospheric structure of the xuefengshan belt, South China: Evidence from a seismic reflection profile

•A deep fault cutting through the Moho surface is identified in the Xuefengshan belt.•Collisional belt of the Yangtze and Cathaysia Blocks is revealed based on identification of geophysical relicts.•Boundary between the Yangtze and Cathaysia Blocks is deduced based on the crustal structure.•Two groups of layered narrow slip belts in the middle crust of the Yangtz and Cathaysia Blocks are identified.•A narrow velocity gradient belt at a depth of ∼90 km in the upper mantle lithosphere is distinguished.