ANIONIC Pt IN SILICATE MELTS AT LOW OXYGEN FUGACITY: SPECIATION, PARTITIONING AND IMPLICATIONS FOR CORE FORMATION PROCESSES

Abstract

Introduction: Most siderophile element concentrations in planetary mantles can be explained by metal/silicate equilibration at high temperature and pressure during core formation. Highly siderophile elements (HSE = Au, Re, and the Pt-group elements), however, usually have higher mantle abundances than predicted by partitioning models, suggesting that their… (More)

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