Early planetesimal differentiation and late accretion shaped Earth’s nitrogen budget
Wenzhong Wang,
Michael J. Walter,
John P. Brodholt
et al.
Abstract:The relative roles of protoplanetary differentiation versus late accretion in establishing Earth’s life-essential volatile element inventory are being hotly debated. To address this issue, we employ first-principles calculations to investigate nitrogen (N) isotope fractionation during Earth’s accretion and differentiation. We find that segregation of an iron core would enrich heavy N isotopes in the residual silicate, while evaporation within a H2-dominated nebular gas produces an enrichment of light N isotope… Show more
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