| Abstract |
Chondritic meteorites contain rock-forming minerals in which the chemical compositions are not uniform. The inhomogeneity is termed as zoning profile, which is considered to reflect the growth condition (cooling rate, closed- or open-system, supercooling, and so forth) when they were formed in early solar system. We invesitigated the zoning profile, growth rate, and mineral morphology formed under a constant cooling rate based on a numerical scheme. We derived a new analytic expression to predict the growth rate and zoning profile with respect to the cooling rate. The analytic formula can be used as a diagnostic tool to evaluate the growth condition of solid-solution minerals, (e.g., olivine) from its zoning profile. |
