Possible meteoroid impact origin of formation of highly-silicic glass inclusion on the HED parent asteroid

Abstract

We have examined the glass inclusions in Dhofar007 cumulate eucrite and Johnstown, Tatahouine diogenites. So the glass inclusions are revealed to be high silica and incompatible elements poor from the measurement of major and trace elements abundances by using EPMA and LAM-ICP-MS. These results may imply that the original melts for the glass inclusions were formed by incongruent melting of orthopyroxenes. And we performed a shock experiment on orthopyroxene. The sample material was a high-quality single crystal enstatite from Tanzania.