A halogen budget of the bulk silicate Earth points to a history of early halogen degassing followed by net regassing.

ABSTRACT: Halogens are important tracers of various planetary formation and evolution processes, and an accurate understanding of their abundances in the Earth's silicate reservoirs can help us reconstruct the history of interactions among mantle, atmosphere, and oceans. The previous studies of halogen abundances in the bulk silicate Earth (BSE) are based on the assumption of constant ratios of element abundances, which is shown to result in a gross underestimation of the BSE halogen budget. Here we present a more robust approach using a log-log linear model. Using this method, we provide an internally consistent estimate of halogen abundances in the depleted mid-ocean ridge basalts (MORB)-source mantle, the enriched ocean island basalts (OIB)-source mantle, the depleted mantle, and BSE. Unlike prev

SUBMITTER: Guo M 

PROVIDER: S-EPMC8713964 | biostudies-literature | 2021 Dec

REPOSITORIES: biostudies-literature