Rubidium isotopic compositions of angrites controlled by extensive evaporation and partial recondensation.

ABSTRACT: The planetesimals in the solar system exhibit varying degrees of moderately volatile elements (MVEs) depletion compared to the protosolar composition. Revealing the relevant mechanisms is crucial for exploring early solar system evolution. Most volatile-depleted materials in the solar system exhibit enrichments in the heavier isotopes of MVEs, which have traditionally been attributed to the loss of volatiles through partial evaporation. Angrites are so far an exception as they are enriched in the lighter isotopes of K. This has been interpreted as reflecting condensation processes. Here, we present Rb isotopic data of angrites and find that they have lighter Rb isotopic compositions than Vesta, Mars, and the Moon. The δ⁸⁷Rb value of the angrite parent body (APB) is estimated to

SUBMITTER: Wang B 

PROVIDER: S-EPMC10769822 | biostudies-literature | 2024 Jan

REPOSITORIES: biostudies-literature