Geochemical, N concentration and N isotopic data of U1502B basalts and veins

Supplementary Table 1. Mineral assemblages of altered basalts and veins from IODP Hole U1502B. Supplementary Table 2. Nitrogen concentration (ppm), δ15NAir (‰), major elements (wt%) and trace elements (ppm) of altered basalts and veins from IODP Hole U1502B. Supplementary Table 3. Partition coefficients (KD ) between minerals and hydrothermal fluids. Supplementary Table 4. Compilation of aqueous geochemical data for deep hydrothermal fluids.