Reconstructing Ocean?Plate Stratigraphy (OPS) to Understand Accretionary Style and Mélange Fabric: Insights From the Bangong?Nujiang Suture (Tibet, China)

Ocean-plate stratigraphy (OPS) refers to the lithostratigraphic column atop an ocean plate, which becomes scraped off during subduction and preserved in accretionary complex (AC). Herein, based on structural, stratigraphic, geochronological studies of ACs from Bangong-Nujiang suture, we demonstrate that OPS can facilitate interpreting structural compositional heterogeneities ACs. Carefully correlated OPSs reveal that, overall sediment-rich lower different types basement topography correspond accretion distinct litho-structural assemblages. In particular, major, high-relief Zhonggang seamount eroded earlier margin was subsequently accreted as coherent slices. contrast, lower-relief, Gaize halted frontal trailing sediments, were dragged downward seismogenic depth underplated pervasive, shear-related broken formations. Such formations may fingerprint past lower-relief-seamount other fossil