Fluid-assisted, temperature-dependent weakening of a nascent plate interface during subduction initiation: Evidence from the basal peridotites of the central Palawan Ophiolite [Dataset]

This dataset contains the electron backscatter diffraction (EBSD) data and mineral chemical composition data used in Hirauchi et al. (2026), “Fluid-assisted, temperature-dependent weakening of a nascent plate interface during subduction initiation: Evidence from the basal peridotites of the central Palawan Ophiolite,” submitted to Journal of Geophysical Research: Solid Earth. The dataset supports the microstructural and geochemical analyses presented in the manuscript.