Estimation of the dynamic processes for the lodranite parent body from an olivine fabric of Y-791491

Abstract

Lodranite meteorites are one group of primitive achondrite. We examined a fabric of Y-791491 lodranite. Results show that Y-791491 have olivine fabric with concentration of b-axis and girdle of other axes. Equilibration temperature of Y-791491 obtained by two-pyroxene thermometry is about 1050°C. On the basis of olivine shock feature, Y-791491 suffered shock event. All these lines of mineralogical indicate that fabric of Y-791491 formed by solid-state deformation process with partial melt.