A revised trapped melt model for iron meteorites applied to the IIIAB group.

ABSTRACT: As the largest magmatic iron meteorite group, the IIIAB group is often used to investigate the process of core crystallization in asteroid-sized bodies. However, previous IIIAB crystallization models have not succeeded in both explaining the scatter among IIIAB irons around the main crystallization trends and using elemental partitioning behavior consistent with experimental determinations. This study outlines a revised approach for modeling the crystallization of irons that uses experimentally determined partition coefficients and can reproduce the IIIAB trends and their associated scatter for 12 siderophile elements simultaneously. A key advancement of this revised trapped melt model is the inclusion of an effect on the resulting solid metal composition due to the formation of troilite.

SUBMITTER: Chabot NL 

PROVIDER: S-EPMC9298042 | biostudies-literature | 2022 Feb

REPOSITORIES: biostudies-literature