Jupiter's influence on the building blocks of Mars and Earth
R. Brasser, N. Dauphas, S. J. Mojzsis

TL;DR
This study investigates how Jupiter's formation and migration influenced Mars' building blocks, using dynamical simulations and isotopic data, revealing significant mixing of materials but with uncertainties requiring further measurements.
Contribution
It combines dynamical modeling with isotopic analysis to assess Jupiter's impact on Mars' accretion, highlighting the need for more precise isotopic data.
Findings
Jupiter's migration caused late-stage accretion to be dominated by EC-type material.
Mars' isotopic composition is approximately 68% EC and 32% OC by mass, with large uncertainties.
Current isotopic data are too imprecise to definitively determine Mars' accretion history.
Abstract
Radiometric dating indicates that Mars accreted in the first ~4 Myr of solar system formation, which coincides with the formation and possible migration of Jupiter. While nebular gas from the protoplanetary disk was still present, Jupiter may have migrated inwards and tacked at 1.5 AU in a 3:2 resonance with Saturn. This migration excited planetary building blocks in the inner solar system, resulting in extensive mixing and planetesimal removal. Here we evaluate the plausible nature of Mars' building blocks, focusing in particular on how its growth was influenced by the formation and migration of Jupiter. We use a combination of dynamical simulations and an isotopic mixing model that traces the accretion of elements with different affinities for metal. Dynamical simulations show that Jupiter's migration causes the late stages of Earth's and Mars' accretion to be dominated by EC-type…
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