Experimentally Determined Subsolidus Metal-Olivine Element Partitioning with Applications to Pallasites.

ABSTRACT: Pallasite meteorites, which consist primarily of olivine and metal, may be remnants of disrupted core-mantle boundaries of differentiated asteroids or planetesimals. The early thermal histories of pallasites are potentially recorded by minor- and trace-element zonation in olivine. However, constraining this history requires knowledge of element behavior under the conditions of pallasite formation, which is lacking for many of the main elements of interest (e.g., Co, Cr, Mn). In this study, we experimentally determined metal/olivine partition coefficients for Fe, Ni, Co, Cr, and Mn in a pallasite analogue at subsolidus temperatures. Metal/olivine partition coefficients (K_M ) increase in the order K_Mn < K_Cr < 1 < K_Fe < <

SUBMITTER: Donohue PH 

PROVIDER: S-EPMC5932634 | biostudies-literature | 2018 Feb

REPOSITORIES: biostudies-literature