Martian differentiation history inferred from copper isotopes.

ABSTRACT: Sulfide segregation plays an important role in redistributing chalcophile elements during planetary differentiation, yet its efficiency on Mars remains poorly constrained. Here, we report the Cu isotopic evidence for planetary-scale sulfide segregation during martian differentiation. We find that the bulk silicate Mars exhibits a measurable enrichment in isotopically heavy Cu (δ⁶⁵Cu_BSMa = -0.03 ± 0.08‰, 2 SD) compared with its chondritic precursors (δ⁶⁵Cu = -0.30 ± 0.09‰). This isotopic offset cannot be explained by magma ocean devolatilization alone and instead requires preferential incorporation of isotopically light Cu into the core via sulfide segregation. A two-stage core formation model, constrained by established martian building blocks, yields an up

SUBMITTER: Wang DL 

PROVIDER: S-EPMC12540747 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature