Significant nitrogen enrichment in altered upper oceanic crust from marginal seas: Insights into global subducting nitrogen budget

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Supplemental Table S1. Major elements (wt%), trace elements (ppm), N concentration and N-Sr isotopes analyses of standard reference material. Supplemental Table S2. Major elements (wt%), trace elements (ppm), Sr isotopes, N concentrations (ppm) and δ15N date of the oceanic crust basalts from SCS. Supplemental Table S3. Bulk mineral concentrations of Hole U1503A basalts. Supplemental Table S4. Nitrogen concentrations and input fluxes of upper oceanic crust of world’s major subduction zones.

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