Fig. 1: Subduction carbon fluxes and chemical compositions of starting materials.
From: Massive carbon storage in convergent margins initiated by subduction of limestone
a The constructed carbon budget in global subduction zones at forearc depths3,8 and subarc depths6. The carbon emission flux in arc volcanos is shown for comparison4. b The compositions of the limestone and dunite used as the starting materials in this study compared to natural marine limestones and arc peridotites (including harzburgites and dunites). The global weighted average composition of subducted sediments (GLOSS-II) is shown for comporison65. Data sources of natural marine limestones and arc peridotites are provided in the supplementary information. c The comparison of the water content of the limestone used as the starting material with marbles from the S.W. Tianshan UHP subduction zone (>2.1 GPa)32.
