Petrology, mineralogy and olivine fabric of acapulcoites and lodranites

Abstract

Acapulcoites have fine-grained textures and chondritic modal abundances. There is no development of olivine LPO in acapulcoites.
Lodranites have coarser-grained textures. We obtained ~970-1100°C from pyroxene thermometer. Two lodranites poor in plagioclase show olivine LPOs. It seems that these lodranites suffered deformation. We suggest that deformation occurred at the evolved and high temperature region in the parent body. On the other hand, it seems that acapulcoite formation region did not suffer deformation.