Silicon isotope constraints on terrestrial planet accretion.

ABSTRACT: Understanding the nature and origin of the precursor material to terrestrial planets is key to deciphering the mechanisms and timescales of planet formation¹. Nucleosynthetic variability among rocky Solar System bodies can trace the composition of planetary building blocks^2-5. Here we report the nucleosynthetic composition of silicon (μ³⁰Si), the most abundant refractory planet-building element, in primitive and differentiated meteorites to identify terrestrial planet precursors. Inner Solar System differentiated bodies, including Mars, record μ³⁰Si deficits of -11.0 ± 3.2 parts per million to -5.8 ± 3.0 parts per million whereas non-carbonaceous and carbonaceous chondrites show μ³⁰Si excesses from 7.4 ± 4.3 parts per million to 32.8 ±

SUBMITTER: Onyett IJ 

PROVIDER: S-EPMC10356600 | biostudies-literature | 2023 Jul

REPOSITORIES: biostudies-literature