Supplemental Material: Oceanic serpentinites: A potentially critical reservoir for deep nitrogen recycling

Detailed sample descriptions (S1), description of high-temperature and low-temperature serpentinization (S2), analytical methods (S3), two-component mixing model (S4), estimation of nitrogen input flux of the serpentinized slab mantle (S5), Figure S1 (compilation of nitrogen concentration data of altered oceanic crust), Figure S2 (two-component mixing model), and Figure S3 (temperature and pressure conditions of meta-basalts, meta-gabbros and meta-serpentinites).