Extended Data Fig. 1: The compositions of starting materials in this study compared with previous high-pressure experiments and natural sediments and altered basalts.
From: Carbonate-rich crust subduction drives the deep carbon and chlorine cycles
a, CO2 and H2O contents of starting materials from this study (CS2, CS1 and CS5) and from previous high-pressure experiments on carbonated sediments26,27,50,60,61 and oceanic crust12,14,62,63,64. The model CaO–Al2O3–SiO2–CO2–H2O system is shown for comparison13. b–f, Chemical compositions of sedimentary columns subducting at global trenches17, the Lesser Antilles sediments from DODP Site 144 (ref. 77), altered oceanic crust18 and starting materials in this study. The global weighted average composition of subducted sediments (GLOSS-II)17 is shown for comparison.
