Science Advances

Supplementary Materials

This PDF file includes:

  • Supplementary Materials and Methods
  • Supplementary Text
  • fig. S1. Comparison between our measured Eu/Eu* in glass standards BCR-2G, BIR-1G, KL2-G, ML3B-G, and StHs6/80-G.
  • fig. S2. Long-term (8 months) reproducibility in the analysis of glass standards BIR-1G and BCR-2G.
  • fig. S3. Chondrite-normalized REE/FeO values for clinopyroxene.
  • fig. S4. Chondrite-normalized REE/FeO values for garnet.
  • fig. S5. Mean Eu/Eu* versus MgO in global arc lavas.
  • fig. S6. Calculated logfO2 as a function of optical basicity assuming Eu/Eu* = 0.8 in garnet.
  • fig. S7. Mineral Mg# versus whole-rock Mg# in the cumulates documented in this work.
  • fig. S8. Melt-cumulate Mg# correlation simulated by pMELTS at 2 GPa, 4 wt % H2O, and various oxygen fugacities.
  • fig. S9. Observed K2O-Mg# correlation in arc magmas, parameterized by an exponential function shown in the figure.
  • fig. S10. Error propagation by Monte Carlo resampling.
  • fig. S11. Sensitivity test of calculated DEu/DEu* and redox paths to the value of DEu* used in the crystal fractionation model.
  • fig. S12. Calculated optical basicity (Λ) as a function of Mg# in arc magmas.
  • References (60–64)

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Other Supplementary Material for this manuscript includes the following:

  • data file S1 (Microsoft Excel format). In-situ mineral composition data and cumulate whole-rock data.
  • data file S2 (Microsoft Excel format). Primitive arc magma compositions.
  • data file S3 (Microsoft Excel format). Global arc igneous rock compilation.

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