Pseudotachylytes and chondrules appear to be reliable materials for paleomagnetic study because of their melt-quenched regimes in terrestrial and extraterrestrial environments. However, they show different magnetic stabilities due to protolith variation, cooling history and an ambient chemical environment. Here, we present rock magnetic and microtextural examinations of Sudbury pseudotachylytes and artificial chondrules, suggesting that the presence of finegrained ferromagnetic crystals embedded within silicate crystals is responsible for the thermal and chemical stability of magnetic remanence information.
