Earth's volatile element depletion pattern inherited from a carbonaceous chondrite-like source.

ABSTRACT: Earth's volatile element abundances (e.g., sulfur, zinc, indium and lead) provide constraints on fundamental processes such as planetary accretion, differentiation, and the delivery of volatile species, like water, which contributed to Earth becoming a habitable planet. The composition of the silicate Earth suggests chemical affinity but isotopic disparity to carbonaceous chondrites, meteorites that record the earliest element fractionations in the protoplanetary disk. However, the volatile element depletion pattern of the silicate Earth is obscured by core formation. Another key problem is the overabundance of indium, which could not be reconciled with any known chondrite group. Here we complement recently published volatile element abundances for carbonaceous chondrites with high precisi

SUBMITTER: Braukmuller N 

PROVIDER: S-EPMC6597353 | biostudies-literature | 2019 Jun

REPOSITORIES: biostudies-literature