Enigmatic carbon isotopic variability in the oceanic upper mantle - Yves Moussallam; Estelle F. Rose-Koga; Cyril Aubaud; Guillaume Georgeais; Pierre Cartigny; Kenneth T. Koga; Jean-Luc Devidal; Peter J. Michael; Kei Shimizu; Alberto E. Saal (Proceedings of the National Academy of Sciences, 2025)