Petrologic and chemical data on the Shergotty meteorite are presented. It is found that Shergotty formed in a diabaselike intrusion where crystallization was rather rapid but where crystal settling and accumulation could occur. Shergotty later was subjected to strong shock, causing the plagioclase to be converted to a dense plagioclase glass (maskelynite) without melting. Heating experiments carried out on individual maskelynite grains indicate that the meteorite was never heated above about 400 C following the shock.
IN: Shock metamorphism of natural materials. Baltimore
- Pub Date:
- Metamorphism (Geology);
- Crystal Structure;
- Meteoritic Composition;