Mantle pyroxenites transformed from decarbonated altered oceanic crust controls the low-δ26Mg central-eastern Asian diffuse basaltic province

This dataset includes 1) Major, trace-element and Sr-Nd-Pb-Mg isotope data for Langshan basalts and lamprophyres, 2) Compilation of major, trace-element and Mg isotope data for the post-110 Ma intraplate basaltic magmatic province in central-eastern Asia, 3) Compiled experimental melt compositions from carbonated and uncarbonated rocks, 4) Details for the partial melting modeling of this study, and 5) Modelled δ26Mg and pyroxenitic mass contributions for adiabatic melts from mantle sources containing variable fractions of silica-deficient pyroxenite