# Decoding the formation of barred olivine chondrules: Realization of numerical replication

## TL;DR

Scientists used numerical simulations to study how chondrules, ancient space rocks, formed, revealing they cooled much faster than previously thought.

## Contribution

A novel numerical simulation approach was used to replicate barred olivine chondrule textures under rapid cooling conditions.

## Key findings

- Barred olivine chondrule textures were successfully simulated under rapid cooling exceeding 10⁴ K/hour.
- The cooling rates found are much higher than previously estimated from experiments.
- This suggests previous theories of chondrule formation may need to be reevaluated.

## Abstract

Millimeter-sized silicate spherules embedded in primitive meteorites, namely, “chondrules,” are the primary solid component of the early solar nebula. They exhibit distinctive solidification textures, formed through rapid cooling from a molten state. The formation conditions of these textures have primarily been inferred on the basis of dynamic crystallization experiments; however, the theoretical verification of the solidification process has been largely neglected. Here, we conducted numerical simulations of the solidification of chondrule melt and successfully reproduced a crystal growth pattern resembling a typical barred olivine chondrule texture. This pattern emerged under conditions of rapid cooling, exceeding 104 kelvins hour−1, which is substantially larger than those inferred experimentally. These results suggest that theories of chondrule formation in the nebula, which have been developed based on experimental results, should be reexamined.

The solidification process of chondrules, the building blocks of planets, was mimicked by sophisticated numerical simulations.