Science Advances

Supplementary Materials

This PDF file includes:

  • table S1. Isotopic compositions of the starting materials, standards, and samples.
  • table S2. Description of the studied samples.
  • table S3. Mass balance calculations of isotopic compositions of the bulk composition for the starting materials and the high-pressure and high-temperature carbonate fluid.
  • fig. S1. SEM images of the FIB preparation, cut on one side of the seed and on the other side to obtain the final slices.
  • fig. S2. Details of the samples analyzed with the NanoSIMS.
  • fig. S3. NanoSIMS maps of 12C for each investigated sample showing the locations of the areas of interest (red squares) corresponding to the location of the measurements reported in table S1 and Fig. 1.
  • Reference (33)

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