Mineral compositions determined using electron-probe microanalysis (EPMA) for oxidized metasedimentary rocks from the islands of Andros, Crete, Naxos, and Tinos, Aegean region, Greece. The analyses were done using the JEOL JXA-8530F field-emission gun EPMA in the Department of Earth and Planetary Sciences, Yale University. Mineral composition results are tabulated as follows. Table 1: Fe-Ti oxides; Table 2: Garnet; Table 3: Epidote; Table 4: Amphibole; Table 5: Clinopyroxene; and Table 6: Phengite. The general analytical and formula calculation procedures are described in Ague et al. (2022; see References).

{"references": ["Ague, J.J., Tassara, S., Holycross, M.E., Li, J.-L., Cottrell, E., Schwarzenbach, E.M., Fassoulas, C. & John, T. (2022). Slab-derived devolatilization fluids oxidized by subducted metasedimentary rocks. Nature Geoscience, https://doi.org/10.1038/s41561-022-00904-7."]}