Helium isotopes reveal a ubiquitous recycled component in the MORB mantle

Jonathan Tucker1, Charles H Langmuir1, Sujoy Mukhopadhyay2, Cedric Hamelin3 and Jocelyn Fuentes4, (1)Harvard University, Earth and Planetary Sciences, Cambridge, United States, (2)University of California Davis, Department of Earth and Planetary Sciences, Davis, United States, (3)Independant scholar, Bergen, Norway, (4)Harvard University, Department of Earth and Planetary Sciences, Cambridge, MA, United States