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Crystallization histories of the group IIF iron meteorites and Eagle Station pallasites

dc.contributor.authorHilton, Connor
dc.contributor.authorAsh, Richard
dc.contributor.authorWalker, Richard
dc.identifier.citationdoi: 10.1111/maps.13602en_US
dc.description.abstractThe group IIF iron meteorites and Eagle Station pallasites (PES) have highly siderophile element abundances (HSE; Re, Os, Ir, Ru, Pt, and Pd) of metal that are consistent with formation in planetesimal cores by fractional crystallization with minor to major solid metal–liquid metal mixing. Modeling of HSE abundances of the IIF irons indicates a complex formation history that included the mixing of primitive and evolved solid and liquid metals. By contrast, modeling of HSE abundances of PES metal suggests these meteorites formed mainly as equilibrium solids from a common liquid. Abundances of some of the siderophile elements in the IIF irons and PES are permissive of a common core origin; however, the abundances of W and Ni indicate the PES ultimately formed on a more oxidized body. The PES most likely formed by the injection of olivine present at the core–mantle boundary into a metallic core liquid as a result of impact. The core then crystallized inward, trapping the olivine.en_US
dc.description.sponsorshipNASA Emerging Worlds grants NNX16AN07G and 80NSSC20K0335en_US
dc.publisherWiley - Meteoritics & Planetary Scienceen_US
dc.subjectGroup IIF iron meteorites, Eagle Station Pallasitesen_US
dc.titleCrystallization histories of the group IIF iron meteorites and Eagle Station pallasitesen_US
dc.relation.isAvailableAtCollege of Computer, Mathematical & Natural Sciencesen_us
dc.relation.isAvailableAtDigital Repository at the University of Marylanden_us
dc.relation.isAvailableAtUniversity of Maryland (College Park, MD)en_us

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